esp32: replace port with PlatformIO implementation and add CI build (#1292)

.github/workflows/gcc.yml

@@ -328,3 +328,15 @@ jobs:
         gcc --version
         make clean
         make gtk-discover
+
+  ports-esp32:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v6
+    - name: Install PlatformIO
+      run: |
+        python3 -m pip install --upgrade pip
+        pip3 install platformio
+    - name: Build ESP32 Port
+      run: |
+        pio run -d ports/esp32

ports/esp32/.gitignore

@@ -0,0 +1,5 @@
+.pio
+.vscode/.browse.c_cpp.db*
+.vscode/c_cpp_properties.json
+.vscode/launch.json
+.vscode/ipch

ports/esp32/README.md

@@ -0,0 +1,132 @@
+# ESP32 Port
+
+Date: 2026-04-04
+Author: Kato Gangstad
+
+This folder contains the ESP32 BACnet port built with PlatformIO.
+It targets multiple ESP32-family boards and covers BACnet MS/TP, BACnet/IP, and BACnet Gateway (based on apps/gateway2) profiles.
+It is based on the current lwIP port and Pico port patterns in this repository.
+
+## Current Scope
+
+- BACnet MS/TP transport for ESP32 boards with RS485
+- BACnet/IP transport for compact WiFi and Ethernet ESP32 targets
+- BACnet routing between BACnet/IP and BACnet MS/TP
+
+## Port Identity
+
+It is the ESP32 BACnet port for the current PlatformIO-based targets in this repository.
+
+## Supported Board Profiles
+
+The current board coverage includes:
+
+- Seeed Studio XIAO ESP32C3 for ultra-compact BACnet/IP
+- M5StamPLC for BACnet MS/TP and BACnet router builds
+- Olimex ESP32-POE for BACnet/IP
+
+The upstream BACnet stack has a broad source set and multiple app profiles.
+This port selects the ESP32-specific transport, board, and application wiring needed for the environments documented below.
+
+## Files
+
+- src/main.cpp: Application loop, BACnet object table, and PLC I/O sync
+- src/mstimer_init.c: millisecond timer hook used by mstimer
+- src/rs485.c: ESP32 RS485 low-level driver for MS/TP
+- src/dlenv.c: MS/TP datalink environment setup and port wiring
+- src/bip_socket.cpp: BACnet/IP UDP socket bridge for WiFi and Ethernet targets
+- extra_script.py: Injects BACnet core/basic sources into the PlatformIO build
+
+## Build Notes
+
+1. Open this folder as a PlatformIO project root, or run PlatformIO with this folder as cwd.
+2. Start with the environment that matches your board and transport profile.
+3. The `platformio.ini` file defines all tested board environments for this port.
+4. Ensure PlatformIO CLI is available in your shell (`pio --version`).
+5. Build with `pio run -e <environment-name>`.
+
+## Tested Environments
+
+The following PlatformIO environments have been built and uploaded successfully:
+
+- `xiao-esp32c3-wifi-bip` on Seeed Studio XIAO ESP32C3
+- `m5stamplc-mstp` on M5StamPLC
+- `m5stamplc-gateway-bip-mstp` on M5StamPLC
+- `esp32-poe-wifi-bip` on Olimex ESP32-POE
+
+## Validation Tools
+
+Interoperability and functional verification have been tested with:
+
+- YABE
+- Honeywell Eaglehawk 4.15
+- Tridium Niagara 4.15
+
+## Board Pictures
+
+The following board photos document the hardware used for the tested environments.
+
+### Seeed Studio XIAO ESP32C3
+
+Used for:
+
+- `xiao-esp32c3-wifi-bip`
+
+Why this board stands out:
+
+- Extremely compact form factor for a BACnet/IP target
+- Physical size: 21 x 17.8 mm
+- Strong candidate for one of the smallest BACnet/IP device ever !
+
+Hardware summary:
+
+- MCU: ESP32-C3
+- CPU type: 32-bit single-core RISC-V
+- CPU clock: 160 MHz
+- RAM: 320 KB
+- Flash: 4 MB
+
+![XIAO ESP32C3](docs/board-photos/Xiao.webp)
+
+### M5StamPLC
+
+- BACnet server object model with Device + Binary Input + Binary Output objects
+- Runtime mapping:
+  - BI 0..7 <- PLC inputs 1..8
+  - BO 0..3 -> PLC relays 1..4
+- RS485 pin mapping aligned with the M5StamPLC hardware profile:
+  - TX: GPIO0
+  - RX: GPIO39
+  - DIR: GPIO46
+
+Used for:
+
+- `m5stamplc-mstp`
+- `m5stamplc-bip`
+- `m5stamplc-gateway-bip-mstp`
+- soon to come `m5stamplc-poe-bip`
+
+Hardware summary:
+
+- MCU: ESP32-S3
+- CPU clock: 240 MHz
+- RAM: 320 KB
+- Flash: 8 MB
+
+![M5StamPLC](docs/board-photos/M5-StamPlc.webp)
+
+### Olimex ESP32-POE
+
+Used for:
+
+- `esp32-poe-wifi-bip`
+- `esp32-poe-eth-bip`
+
+Hardware summary:
+
+- MCU: ESP32
+- CPU clock: 240 MHz
+- RAM: 320 KB
+- Flash: 4 MB
+
+![Olimex ESP32-POE](docs/board-photos/Olimex-ESP32-POE.jpg)

ports/esp32/boards/m5stamplc.json

@@ -0,0 +1,21 @@
+{
+    "build": {
+        "core": "esp32",
+        "mcu": "esp32s3",
+        "variant": "esp32s3",
+        "f_cpu": "240000000L",
+        "f_flash": "80000000L",
+        "flash_mode": "dio"
+    },
+    "frameworks": [
+        "arduino"
+    ],
+    "name": "M5Stack StamPLC",
+    "url": "https://m5stack.com/products/m5stamplc",
+    "vendor": "M5Stack",
+    "upload": {
+        "speed": 460800,
+        "maximum_size": 8388608,
+        "maximum_ram_size": 327680
+    }
+}

ports/esp32/extra_script.py

@@ -0,0 +1,120 @@
+# @file
+# @brief Build-time BACnet source wiring for PlatformIO environments
+# @author Kato Gangstad
+
+Import("env")
+
+from pathlib import Path
+
+PIOENV = env.get("PIOENV", "")
+if PIOENV not in (
+    "m5stamplc-mstp",
+    "m5stamplc-bip",
+    "esp32-poe-wifi-bip",
+    "esp32-poe-eth-bip",
+    "xiao-esp32c3-wifi-bip",
+    "m5stamplc-gateway-bip-mstp",
+):
+    Return()
+
+project_dir = Path(env.subst("$PROJECT_DIR")).resolve()
+bacnet_src_root = (project_dir / ".." / ".." / "src").resolve()
+
+bacnet_common_sources = [
+    "bacnet/basic/binding/address.c",
+    "bacnet/basic/server/bacnet_device.c",
+    "bacnet/basic/object/ai.c",
+    "bacnet/basic/object/bi.c",
+    "bacnet/basic/object/bo.c",
+    "bacnet/basic/npdu/h_npdu.c",
+    "bacnet/basic/service/h_apdu.c",
+    "bacnet/basic/service/h_dcc.c",
+    "bacnet/basic/service/h_noserv.c",
+    "bacnet/basic/service/h_rd.c",
+    "bacnet/basic/service/h_rp.c",
+    "bacnet/basic/service/h_rpm.c",
+    "bacnet/basic/service/h_whohas.c",
+    "bacnet/basic/service/h_whois.c",
+    "bacnet/basic/service/h_wp.c",
+    "bacnet/basic/service/s_iam.c",
+    "bacnet/basic/service/s_ihave.c",
+    "bacnet/basic/sys/datetime_mstimer.c",
+    "bacnet/basic/sys/days.c",
+    "bacnet/basic/sys/dst.c",
+    "bacnet/basic/sys/debug.c",
+    "bacnet/basic/sys/ringbuf.c",
+    "bacnet/basic/sys/fifo.c",
+    "bacnet/basic/sys/mstimer.c",
+    "bacnet/basic/tsm/tsm.c",
+    "bacnet/abort.c",
+    "bacnet/bacaction.c",
+    "bacnet/bacaddr.c",
+    "bacnet/bacapp.c",
+    "bacnet/bacdcode.c",
+    "bacnet/bacdest.c",
+    "bacnet/bacdevobjpropref.c",
+    "bacnet/bacerror.c",
+    "bacnet/bacint.c",
+    "bacnet/bacreal.c",
+    "bacnet/bacstr.c",
+    "bacnet/datetime.c",
+    "bacnet/dcc.c",
+    "bacnet/hostnport.c",
+    "bacnet/iam.c",
+    "bacnet/ihave.c",
+    "bacnet/indtext.c",
+    "bacnet/memcopy.c",
+    "bacnet/npdu.c",
+    "bacnet/proplist.c",
+    "bacnet/rd.c",
+    "bacnet/reject.c",
+    "bacnet/rp.c",
+    "bacnet/rpm.c",
+    "bacnet/timestamp.c",
+    "bacnet/whohas.c",
+    "bacnet/whois.c",
+    "bacnet/wp.c",
+    "bacnet/cov.c",
+    "bacnet/basic/sys/keylist.c",
+]
+
+bacnet_transport_sources = {
+    "m5stamplc-mstp": [
+        "bacnet/datalink/cobs.c",
+        "bacnet/datalink/crc.c",
+        "bacnet/datalink/dlmstp.c",
+        "bacnet/datalink/mstp.c",
+        "bacnet/datalink/mstptext.c",
+    ],
+    "m5stamplc-bip": [
+        "bacnet/datalink/bvlc.c",
+    ],
+    "esp32-poe-wifi-bip": [
+        "bacnet/datalink/bvlc.c",
+    ],
+    "esp32-poe-eth-bip": [
+        "bacnet/datalink/bvlc.c",
+    ],
+    "xiao-esp32c3-wifi-bip": [
+        "bacnet/datalink/bvlc.c",
+    ],
+    "m5stamplc-gateway-bip-mstp": [
+        "bacnet/datalink/bvlc.c",
+        "bacnet/datalink/cobs.c",
+        "bacnet/datalink/crc.c",
+        "bacnet/datalink/dlmstp.c",
+        "bacnet/datalink/mstp.c",
+        "bacnet/datalink/mstptext.c",
+    ],
+}
+
+bacnet_sources = bacnet_common_sources + bacnet_transport_sources.get(PIOENV, [])
+
+env.Append(CPPPATH=[str(project_dir / "src"), str(bacnet_src_root)])
+
+for rel in bacnet_sources:
+    env.BuildSources(
+        str(Path("$BUILD_DIR") / "bacnet"),
+        str(bacnet_src_root),
+        src_filter=f"+<{rel}>",
+    )

ports/esp32/lib/readme.txt

@@ -1,36 +0,0 @@
-
-This directory is intended for the project specific (private) libraries.
-PlatformIO will compile them to static libraries and link to executable file.
-
-The source code of each library should be placed in separate directory, like
-"lib/private_lib/[here are source files]".
-
-For example, see how can be organized `Foo` and `Bar` libraries:
-
-|--lib
-|  |--Bar
-|  |  |--docs
-|  |  |--examples
-|  |  |--src
-|  |     |- Bar.c
-|  |     |- Bar.h
-|  |--Foo
-|  |  |- Foo.c
-|  |  |- Foo.h
-|  |- readme.txt --> THIS FILE
-|- platformio.ini
-|--src
-   |- main.c
-
-Then in `src/main.c` you should use:
-
-#include <Foo.h>
-#include <Bar.h>
-
-// rest H/C/CPP code
-
-PlatformIO will find your libraries automatically, configure preprocessor's
-include paths and build them.
-
-More information about PlatformIO Library Dependency Finder
-- http://docs.platformio.org/page/librarymanager/ldf.html

ports/esp32/platformio.ini

@@ -6,14 +6,155 @@
 ;   Advanced options: extra scripting
 ;
 ; Please visit documentation for the other options and examples
-; http://docs.platformio.org/page/projectconf.html
+; https://docs.platformio.org/page/projectconf.html
 
-[env:esp32thing]
+[platformio]
+default_envs = m5stamplc-mstp
+
+[wifi_common]
+build_flags =
+    -DWIFI_SSID=\"REPLACE_WITH_WIFI_SSID\"
+    -DWIFI_PASS=\"REPLACE_WITH_WIFI_PASSWORD\"
+
+[bip_common]
+build_flags =
+    -UBACDL_MSTP
+    -DBACDL_BIP
+    -DBACNET_IP_PORT=47808
+    -DMAX_APDU=1476
+
+[env]
 platform = espressif32
-board = esp32thing
+framework = arduino
-framework = espidf
+monitor_speed = 115200
+upload_speed = 921600
+extra_scripts = pre:extra_script.py
+lib_deps =
+    m5stack/M5StamPLC@^1.2.0
+build_unflags =
+    -std=gnu++11
+build_flags =
+    -std=gnu11
+    -std=gnu++17
+    -I src
+    -I ../../src
+    -DBACDL_MSTP
+    -DMAX_TSM_TRANSACTIONS=1
+    -DPRINT_ENABLED=0
+    -DBACNET_BIG_ENDIAN=0
+    -DCRC_USE_TABLE
+    -DBACAPP_MINIMAL
+    -DBACAPP_TIMESTAMP
+    -DBACNET_STACK_DEPRECATED_DISABLE
+    -DBACNET_PROTOCOL_REVISION=16
+    -DCONFIG_BACNET_BASIC_OBJECT_ANALOG_INPUT
+    -DCONFIG_BACNET_BASIC_OBJECT_BINARY_INPUT
+    -DCONFIG_BACNET_BASIC_OBJECT_BINARY_OUTPUT
 
-upload_port = COM7
+[env:m5stamplc-mstp]
-upload_speed = 1152000
+board = m5stamplc
+build_flags =
+    ${env.build_flags}
+    -DMAX_APDU=480
+build_src_filter =
+    +<main.cpp>
+    +<bacnet_app.c>
+    +<mstimer_init.c>
+    +<rs485.c>
+    +<dlenv.c>
+lib_deps = m5stack/M5StamPLC@^1.2.0
 
-monitor_baud = 115200
+[env:m5stamplc-bip]
+board = m5stamplc
+build_flags =
+    ${env.build_flags}
+    ${bip_common.build_flags}
+    ${wifi_common.build_flags}
+    -DUSE_M5STAMPLC_IO=1
+build_src_filter =
+    +<main_bip.cpp>
+    +<bacnet_app.c>
+    +<bip.c>
+    +<bip_init.c>
+    +<bvlc.c>
+    +<bip_socket.cpp>
+    +<mstimer_init.c>
+lib_deps = m5stack/M5StamPLC@^1.2.0
+
+[env:esp32-poe-wifi-bip]
+board = esp32-poe
+build_flags =
+    ${env.build_flags}
+    ${bip_common.build_flags}
+    ${wifi_common.build_flags}
+    -DUSE_M5STAMPLC_IO=0
+    -DUSE_ETH_INTERFACE=0
+build_src_filter =
+    +<main_bip.cpp>
+    +<bacnet_app.c>
+    +<bip.c>
+    +<bip_init.c>
+    +<bvlc.c>
+    +<bip_socket.cpp>
+    +<mstimer_init.c>
+lib_deps =
+
+[env:esp32-poe-eth-bip]
+board = esp32-poe
+build_flags =
+    ${env.build_flags}
+    ${bip_common.build_flags}
+    -DUSE_M5STAMPLC_IO=0
+    -DUSE_ETH_INTERFACE=1
+build_src_filter =
+    +<main_bip.cpp>
+    +<bacnet_app.c>
+    +<bip.c>
+    +<bip_init.c>
+    +<bvlc.c>
+    +<bip_socket.cpp>
+    +<mstimer_init.c>
+lib_deps =
+
+[env:xiao-esp32c3-wifi-bip]
+board = seeed_xiao_esp32c3
+build_flags =
+    ${env.build_flags}
+    ${bip_common.build_flags}
+    ${wifi_common.build_flags}
+    -DUSE_M5STAMPLC_IO=0
+    -DUSE_ETH_INTERFACE=0
+build_src_filter =
+    +<main_bip.cpp>
+    +<bacnet_app.c>
+    +<bip.c>
+    +<bip_init.c>
+    +<bvlc.c>
+    +<bip_socket.cpp>
+    +<mstimer_init.c>
+lib_deps =
+
+[env:m5stamplc-gateway-bip-mstp]
+board = m5stamplc
+build_flags =
+    ${env.build_flags}
+    ${wifi_common.build_flags}
+    -DMAX_APDU=480
+    -UBACDL_MSTP
+    -DBACDL_MSTP
+    -DBACDL_BIP
+    -DBACNET_IP_PORT=47808
+    -DROUTER_BIP_NET=1
+    -DROUTER_MSTP_NET=200
+    -DROUTER_MSTP_MAC=2
+build_src_filter =
+    +<main_gateway_router.cpp>
+    +<bacnet_app.c>
+    +<bip.c>
+    +<bip_init.c>
+    +<bvlc.c>
+    +<bip_socket.cpp>
+    +<mstimer_init.c>
+    +<rs485.c>
+    +<dlenv.c>
+lib_deps = m5stack/M5StamPLC@^1.2.0

ports/esp32/readme.txt

@@ -1,67 +0,0 @@
-Bacnet Server for Espressif ESP32
-    Steve Karg Bacnet stack using PlatformIO open source ecosystem for IoT development on VSCode or Atom
-    F. Chaxel 2017
-
-TODO list :
-
-(Install VSCode or Atom and add the PlatformIO extension)
-
-Edit platformio.ini to adjust board, Com Port, ...
-
-Goto lib/stack and copy the requested files from Steve code :
-
-   all .h from include directory (not all required by it's simple)
-
-   these .c files from src or demo/handlers
-    abort.c
-    address.c
-    apdu.c
-    bacaddr.c
-    bacapp.c
-    bacdcode.c
-    bacerror.c
-    bacint.c
-    bacreal.c
-    bacstr.c
-    bip.c
-    bvlc.c
-    cov.c
-    datetime.c
-    bacdevobjpropref.c
-    dcc.c
-    debug.c
-    h_cov.c
-    h_ucov.c
-    h_npdu.c
-    h_rp.c
-    h_rpm.c
-    h_whois.c
-    h_wp.c
-    iam.c
-    hostnport.c
-    lighting.c
-    memcopy.c
-    noserv.c
-    npdu.c
-    proplist.c
-    reject.c
-    rp.c
-    rpm.c
-    s_iam.c
-    tsm.c
-    whois.c
-    wp.c
-
-Modify
-    in config.h
-        MAX_TSM_TRANSACTIONS 255, set the value to 10 for instances
-    in main.c
-        wifi_config to fit your wifi network
-        BACNET_LED 5, set another IO number depending of your board
-
-A lot of Warning will be issued at compile time due to the redefinition of BIT macros.
-Could be removes by placing a #ifndef #BIT0 .. #endif arround the BIT macro in bits.h,
-and moving to the top of include list
-    #include "bacnet/datalink/datalink.h" in tsm.c, s_iam and in device.c
-    #include "bacport.h" in bip.c and in bip.h (redondant include in bip.c)
-    #include "bacnet/datalink/bvlc.h" in bvlc.c

ports/esp32/src/.clang-format

@@ -1,7 +0,0 @@
----
-# Disable formatting for now as there is external code. We should move external
-# code to a separate directory and enable formatting for our code.
-DisableFormat: true
-
-# DisableFormat will not disable include sorting with some versions.
-SortIncludes: Never

ports/esp32/src/ai.h

@@ -1,151 +0,0 @@
-/**************************************************************************
-*
-* Copyright (C) 2005 Steve Karg <skarg@users.sourceforge.net>
-* Copyright (C) 2011 Krzysztof Malorny <malornykrzysztof@gmail.com>
-*
-* SPDX-License-Identifier: MIT
-*
-*********************************************************************/
-#ifndef AI_H
-#define AI_H
-
-#include <stdbool.h>
-#include <stdint.h>
-#include "bacnet/bacdef.h"
-#include "bacnet/rp.h"
-#include "bacnet/wp.h"
-#if defined(INTRINSIC_REPORTING)
-#include "bacnet/basic/object/nc.h"
-#include "bacnet/getevent.h"
-#include "bacnet/alarm_ack.h"
-#include "bacnet/get_alarm_sum.h"
-#endif
-
-#ifdef __cplusplus
-extern "C" {
-#endif /* __cplusplus */
-
-    typedef struct analog_input_descr {
-        unsigned Event_State:3;
-        float Present_Value;
-        BACNET_RELIABILITY Reliability;
-        bool Out_Of_Service;
-        uint8_t Units;
-        float Prior_Value;
-        float COV_Increment;
-        bool Changed;
-#if defined(INTRINSIC_REPORTING)
-        uint32_t Time_Delay;
-        uint32_t Notification_Class;
-        float High_Limit;
-        float Low_Limit;
-        float Deadband;
-        unsigned Limit_Enable:2;
-        unsigned Event_Enable:3;
-        unsigned Notify_Type:1;
-        ACKED_INFO Acked_Transitions[MAX_BACNET_EVENT_TRANSITION];
-        BACNET_DATE_TIME Event_Time_Stamps[MAX_BACNET_EVENT_TRANSITION];
-        /* time to generate event notification */
-        uint32_t Remaining_Time_Delay;
-        /* AckNotification informations */
-        ACK_NOTIFICATION Ack_notify_data;
-#endif
-    } ANALOG_INPUT_DESCR;
-
-    void Analog_Input_Property_Lists(
-        const int32_t **pRequired,
-        const int32_t **pOptional,
-        const int32_t **pProprietary);
-
-    bool Analog_Input_Valid_Instance(
-        uint32_t object_instance);
-    unsigned Analog_Input_Count(
-        void);
-    uint32_t Analog_Input_Index_To_Instance(
-        unsigned index);
-    unsigned Analog_Input_Instance_To_Index(
-        uint32_t instance);
-    bool Analog_Input_Object_Instance_Add(
-        uint32_t instance);
-
-    bool Analog_Input_Object_Name(
-        uint32_t object_instance,
-        BACNET_CHARACTER_STRING * object_name);
-    bool Analog_Input_Name_Set(
-        uint32_t object_instance,
-        const char *new_name);
-
-    const char *Analog_Input_Description(
-        uint32_t instance);
-    bool Analog_Input_Description_Set(
-        uint32_t instance,
-        const char *new_name);
-
-    bool Analog_Input_Units_Set(
-        uint32_t instance,
-        uint16_t units);
-    uint16_t Analog_Input_Units(
-        uint32_t instance);
-
-    int Analog_Input_Read_Property(
-        BACNET_READ_PROPERTY_DATA * rpdata);
-    bool Analog_Input_Write_Property(
-        BACNET_WRITE_PROPERTY_DATA * wp_data);
-
-    float Analog_Input_Present_Value(
-        uint32_t object_instance);
-    void Analog_Input_Present_Value_Set(
-        uint32_t object_instance,
-        float value);
-
-    bool Analog_Input_Out_Of_Service(
-        uint32_t object_instance);
-    void Analog_Input_Out_Of_Service_Set(
-        uint32_t object_instance,
-        bool oos_flag);
-
-    bool Analog_Input_Change_Of_Value(
-        uint32_t instance);
-    void Analog_Input_Change_Of_Value_Clear(
-        uint32_t instance);
-    bool Analog_Input_Encode_Value_List(
-        uint32_t object_instance,
-        BACNET_PROPERTY_VALUE * value_list);
-    float Analog_Input_COV_Increment(
-        uint32_t instance);
-    void Analog_Input_COV_Increment_Set(
-        uint32_t instance,
-        float value);
-
-    /* note: header of Intrinsic_Reporting function is required
-       even when INTRINSIC_REPORTING is not defined */
-    void Analog_Input_Intrinsic_Reporting(
-        uint32_t object_instance);
-
-#if defined(INTRINSIC_REPORTING)
-    int Analog_Input_Event_Information(
-        unsigned index,
-        BACNET_GET_EVENT_INFORMATION_DATA * getevent_data);
-
-    int Analog_Input_Alarm_Ack(
-        BACNET_ALARM_ACK_DATA * alarmack_data,
-        BACNET_ERROR_CODE * error_code);
-
-    int Analog_Input_Alarm_Summary(
-        unsigned index,
-        BACNET_GET_ALARM_SUMMARY_DATA * getalarm_data);
-#endif
-
-    uint32_t Analog_Input_Create(
-        uint32_t object_instance);
-    bool Analog_Input_Delete(
-        uint32_t object_instance);
-    void Analog_Input_Cleanup(
-        void);
-    void Analog_Input_Init(
-        void);
-
-#ifdef __cplusplus
-}
-#endif /* __cplusplus */
-#endif

ports/esp32/src/bacnet_app.c

@@ -0,0 +1,365 @@
+/**
+ * @file
+ * @brief BACnet application glue for the PlatformIO ESP32 port
+ * @author Kato Gangstad
+ */
+
+#include <stdbool.h>
+#include <stdint.h>
+
+#include "bacnet_app.h"
+#include "mstimer_init.h"
+
+#if defined(BACDL_MSTP)
+#include "dlenv.h"
+#include "bacnet/datalink/datalink.h"
+#elif defined(BACDL_BIP)
+#include "bip.h"
+#endif
+
+#include "bacnet/basic/binding/address.h"
+#include "bacnet/basic/object/ai.h"
+#include "bacnet/basic/object/bi.h"
+#include "bacnet/basic/object/bo.h"
+#include "bacnet/basic/object/device.h"
+#include "bacnet/basic/services.h"
+#include "bacnet/basic/tsm/tsm.h"
+#include "bacnet/npdu.h"
+
+#ifndef BACNET_IP_PORT
+#define BACNET_IP_PORT 47808
+#endif
+
+#if defined(BACDL_BIP)
+static uint8_t PDUBuffer[BIP_MPDU_MAX];
+#else
+static uint8_t PDUBuffer[MAX_MPDU + 16];
+#endif
+
+#define PLC_INPUT_COUNT 8
+#define PLC_RELAY_COUNT 4
+#define PLC_ANALOG_COUNT 2
+
+#define PLC_AI_INSTANCE_TEMPERATURE 100
+#define PLC_AI_INSTANCE_FREE_HEAP_KB 101
+
+static uint32_t Plc_Input_Instances[PLC_INPUT_COUNT];
+static uint32_t Plc_Relay_Instances[PLC_RELAY_COUNT];
+static uint32_t Plc_Analog_Instances[PLC_ANALOG_COUNT];
+
+static const char *const Plc_Input_Names[PLC_INPUT_COUNT] = {
+    "PLC Input 1", "PLC Input 2", "PLC Input 3", "PLC Input 4",
+    "PLC Input 5", "PLC Input 6", "PLC Input 7", "PLC Input 8",
+};
+
+static const char *const Plc_Input_Descriptions[PLC_INPUT_COUNT] = {
+    "PLC Input 1", "PLC Input 2", "PLC Input 3", "PLC Input 4",
+    "PLC Input 5", "PLC Input 6", "PLC Input 7", "PLC Input 8",
+};
+
+static const char *const Plc_Relay_Names[PLC_RELAY_COUNT] = {
+    "PLC Relay 1",
+    "PLC Relay 2",
+    "PLC Relay 3",
+    "PLC Relay 4",
+};
+
+static const char *const Plc_Relay_Descriptions[PLC_RELAY_COUNT] = {
+    "PLC Relay 1",
+    "PLC Relay 2",
+    "PLC Relay 3",
+    "PLC Relay 4",
+};
+
+static const char *const Plc_Analog_Names[PLC_ANALOG_COUNT] = {
+    "PLC Temperature",
+    "Free Heap KB",
+};
+
+static const char *const Plc_Analog_Descriptions[PLC_ANALOG_COUNT] = {
+    "Internal PLC temperature in C",
+    "Free heap memory in kilobytes",
+};
+
+static object_functions_t My_Object_Table[] = {
+    { OBJECT_DEVICE,
+      NULL,
+      Device_Count,
+      Device_Index_To_Instance,
+      Device_Valid_Object_Instance_Number,
+      Device_Object_Name,
+      Device_Read_Property_Local,
+      Device_Write_Property_Local,
+      Device_Property_Lists,
+      DeviceGetRRInfo,
+      NULL,
+      NULL,
+      NULL,
+      NULL,
+      NULL,
+      NULL,
+      NULL,
+      NULL,
+      NULL,
+      NULL,
+      Device_Writable_Property_List },
+
+    { OBJECT_BINARY_INPUT,
+      Binary_Input_Init,
+      Binary_Input_Count,
+      Binary_Input_Index_To_Instance,
+      Binary_Input_Valid_Instance,
+      Binary_Input_Object_Name,
+      Binary_Input_Read_Property,
+      NULL,
+      Binary_Input_Property_Lists,
+      NULL,
+      NULL,
+      Binary_Input_Encode_Value_List,
+      Binary_Input_Change_Of_Value,
+      Binary_Input_Change_Of_Value_Clear,
+      NULL,
+      NULL,
+      NULL,
+      Binary_Input_Create,
+      Binary_Input_Delete,
+      NULL,
+      Binary_Input_Writable_Property_List },
+
+    { OBJECT_ANALOG_INPUT,
+      Analog_Input_Init,
+      Analog_Input_Count,
+      Analog_Input_Index_To_Instance,
+      Analog_Input_Valid_Instance,
+      Analog_Input_Object_Name,
+      Analog_Input_Read_Property,
+      Analog_Input_Write_Property,
+      Analog_Input_Property_Lists,
+      NULL,
+      NULL,
+      Analog_Input_Encode_Value_List,
+      Analog_Input_Change_Of_Value,
+      Analog_Input_Change_Of_Value_Clear,
+      Analog_Input_Intrinsic_Reporting,
+      NULL,
+      NULL,
+      Analog_Input_Create,
+      Analog_Input_Delete,
+      NULL,
+      Analog_Input_Writable_Property_List },
+
+    { OBJECT_BINARY_OUTPUT,
+      Binary_Output_Init,
+      Binary_Output_Count,
+      Binary_Output_Index_To_Instance,
+      Binary_Output_Valid_Instance,
+      Binary_Output_Object_Name,
+      Binary_Output_Read_Property,
+      Binary_Output_Write_Property,
+      Binary_Output_Property_Lists,
+      NULL,
+      NULL,
+      Binary_Output_Encode_Value_List,
+      Binary_Output_Change_Of_Value,
+      Binary_Output_Change_Of_Value_Clear,
+      NULL,
+      NULL,
+      NULL,
+      Binary_Output_Create,
+      Binary_Output_Delete,
+      NULL,
+      Binary_Output_Writable_Property_List },
+
+    { MAX_BACNET_OBJECT_TYPE,
+      NULL,
+      NULL,
+      NULL,
+      NULL,
+      NULL,
+      NULL,
+      NULL,
+      NULL,
+      NULL,
+      NULL,
+      NULL,
+      NULL,
+      NULL,
+      NULL,
+      NULL,
+      NULL,
+      NULL,
+      NULL,
+      NULL,
+      NULL }
+};
+
+/**
+ * @brief Create and initialize the BACnet objects exposed by this port
+ */
+static void init_server_objects(void)
+{
+    uint32_t instance;
+
+    Device_Init(My_Object_Table);
+
+    for (uint8_t i = 0; i < PLC_INPUT_COUNT; i++) {
+        instance = Binary_Input_Create(i);
+        Plc_Input_Instances[i] = instance;
+        (void)Binary_Input_Name_Set(instance, Plc_Input_Names[i]);
+        (void)Binary_Input_Description_Set(instance, Plc_Input_Descriptions[i]);
+    }
+
+    for (uint8_t i = 0; i < PLC_RELAY_COUNT; i++) {
+        instance = Binary_Output_Create(i);
+        Plc_Relay_Instances[i] = instance;
+        (void)Binary_Output_Name_Set(instance, Plc_Relay_Names[i]);
+        (void)Binary_Output_Description_Set(
+            instance, Plc_Relay_Descriptions[i]);
+        (void)Binary_Output_Present_Value_Set(
+            instance, BINARY_INACTIVE, BACNET_MAX_PRIORITY);
+    }
+
+    Plc_Analog_Instances[0] = Analog_Input_Create(PLC_AI_INSTANCE_TEMPERATURE);
+    Plc_Analog_Instances[1] = Analog_Input_Create(PLC_AI_INSTANCE_FREE_HEAP_KB);
+
+    (void)Analog_Input_Name_Set(Plc_Analog_Instances[0], Plc_Analog_Names[0]);
+    (void)Analog_Input_Description_Set(
+        Plc_Analog_Instances[0], Plc_Analog_Descriptions[0]);
+    (void)Analog_Input_Units_Set(
+        Plc_Analog_Instances[0], UNITS_DEGREES_CELSIUS);
+
+    (void)Analog_Input_Name_Set(Plc_Analog_Instances[1], Plc_Analog_Names[1]);
+    (void)Analog_Input_Description_Set(
+        Plc_Analog_Instances[1], Plc_Analog_Descriptions[1]);
+    (void)Analog_Input_Units_Set(Plc_Analog_Instances[1], UNITS_NO_UNITS);
+}
+
+/**
+ * @brief Initialize the BACnet application and selected datalink
+ */
+void bacnet_app_init(void)
+{
+    systimer_init();
+
+    address_init();
+    Device_Set_Object_Instance_Number(12345);
+    init_server_objects();
+
+#if defined(BACDL_MSTP)
+    if (!m5_dlenv_init(2)) {
+        for (;;) { }
+    }
+#elif defined(BACDL_BIP)
+    if (!bip_init((uint16_t)BACNET_IP_PORT)) {
+        for (;;) { }
+    }
+#endif
+
+    apdu_set_unrecognized_service_handler_handler(handler_unrecognized_service);
+    apdu_set_unconfirmed_handler(SERVICE_UNCONFIRMED_WHO_IS, handler_who_is);
+    apdu_set_unconfirmed_handler(SERVICE_UNCONFIRMED_WHO_HAS, handler_who_has);
+    apdu_set_confirmed_handler(
+        SERVICE_CONFIRMED_READ_PROPERTY, handler_read_property);
+    apdu_set_confirmed_handler(
+        SERVICE_CONFIRMED_READ_PROP_MULTIPLE, handler_read_property_multiple);
+    apdu_set_confirmed_handler(
+        SERVICE_CONFIRMED_WRITE_PROPERTY, handler_write_property);
+    apdu_set_confirmed_handler(
+        SERVICE_CONFIRMED_DEVICE_COMMUNICATION_CONTROL,
+        handler_device_communication_control);
+
+    Send_I_Am(&Handler_Transmit_Buffer[0]);
+}
+
+/**
+ * @brief Process one BACnet polling cycle and advance timers
+ */
+void bacnet_app_tick(void)
+{
+    BACNET_ADDRESS src = { 0 };
+    uint16_t pdu_len = 0;
+
+#if defined(BACDL_BIP)
+    pdu_len = bip_receive(&src, &PDUBuffer[0], sizeof(PDUBuffer), 0);
+#else
+    pdu_len = datalink_receive(&src, &PDUBuffer[0], MAX_MPDU, 0);
+#endif
+    if (pdu_len) {
+        npdu_handler(&src, &PDUBuffer[0], pdu_len);
+    }
+
+    tsm_timer_milliseconds(1);
+}
+
+/**
+ * @brief Get the number of exposed PLC binary inputs
+ * @return number of binary inputs
+ */
+uint8_t bacnet_app_input_count(void)
+{
+    return PLC_INPUT_COUNT;
+}
+
+/**
+ * @brief Get the number of exposed PLC relay outputs
+ * @return number of binary outputs
+ */
+uint8_t bacnet_app_relay_count(void)
+{
+    return PLC_RELAY_COUNT;
+}
+
+/**
+ * @brief Update a BACnet binary input from PLC state
+ * @param index zero-based PLC input index
+ * @param active input state to publish
+ */
+void bacnet_app_input_set(uint8_t index, bool active)
+{
+    uint32_t instance;
+
+    if (index >= PLC_INPUT_COUNT) {
+        return;
+    }
+
+    instance = Plc_Input_Instances[index];
+
+    (void)Binary_Input_Present_Value_Set(
+        instance, active ? BINARY_ACTIVE : BINARY_INACTIVE);
+}
+
+/**
+ * @brief Read the commanded state of a BACnet relay output
+ * @param index zero-based relay index
+ * @return true if the relay should be active
+ */
+bool bacnet_app_relay_get(uint8_t index)
+{
+    uint32_t instance;
+
+    if (index >= PLC_RELAY_COUNT) {
+        return false;
+    }
+
+    instance = Plc_Relay_Instances[index];
+
+    return (Binary_Output_Present_Value(instance) == BINARY_ACTIVE);
+}
+
+/**
+ * @brief Update the analog input that reports PLC temperature
+ * @param value_celsius temperature in degrees Celsius
+ */
+void bacnet_app_temperature_set(float value_celsius)
+{
+    Analog_Input_Present_Value_Set(Plc_Analog_Instances[0], value_celsius);
+}
+
+/**
+ * @brief Update the analog input that reports free heap memory
+ * @param value_kb free heap in kilobytes
+ */
+void bacnet_app_free_heap_kb_set(float value_kb)
+{
+    Analog_Input_Present_Value_Set(Plc_Analog_Instances[1], value_kb);
+}

ports/esp32/src/bacnet_app.h

@@ -0,0 +1,69 @@
+/**
+ * @file
+ * @brief Public BACnet application hooks for the PlatformIO ESP32 port
+ * @author Kato Gangstad
+ */
+
+#ifndef M5STAMPLC_BACNET_APP_H
+#define M5STAMPLC_BACNET_APP_H
+
+#include <stdbool.h>
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @brief Initialize the BACnet application and datalink bindings
+ */
+void bacnet_app_init(void);
+
+/**
+ * @brief Run one BACnet processing cycle
+ */
+void bacnet_app_tick(void);
+
+/**
+ * @brief Get the number of published PLC inputs
+ * @return number of PLC inputs
+ */
+uint8_t bacnet_app_input_count(void);
+
+/**
+ * @brief Get the number of published PLC relays
+ * @return number of PLC relays
+ */
+uint8_t bacnet_app_relay_count(void);
+
+/**
+ * @brief Push a PLC input state into the BACnet object model
+ * @param index zero-based input index
+ * @param active input state
+ */
+void bacnet_app_input_set(uint8_t index, bool active);
+
+/**
+ * @brief Read the requested state for a PLC relay
+ * @param index zero-based relay index
+ * @return true if the relay should be active
+ */
+bool bacnet_app_relay_get(uint8_t index);
+
+/**
+ * @brief Update the published PLC temperature value
+ * @param value_celsius temperature in degrees Celsius
+ */
+void bacnet_app_temperature_set(float value_celsius);
+
+/**
+ * @brief Update the published free heap value
+ * @param value_kb free heap in kilobytes
+ */
+void bacnet_app_free_heap_kb_set(float value_kb);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif

ports/esp32/src/bip.c

@@ -0,0 +1,350 @@
+/**
+ * @file
+ * @brief BACnet/IP datalink implementation for the PlatformIO ESP32 port
+ * @author Kato Gangstad
+ */
+
+#include <stdbool.h>
+#include <stdint.h>
+#include <string.h>
+
+#include "bacnet/bacdcode.h"
+#include "bacnet/bacint.h"
+#include "bacnet/datalink/bvlc.h"
+
+#include "bip.h"
+#include "bvlc.h"
+
+#if PRINT_ENABLED || DEBUG
+#include <stdio.h>
+#endif
+
+#define MAX_SOCK_NUM 8
+
+static uint8_t BIP_Socket = MAX_SOCK_NUM;
+static uint16_t BIP_Port = 0;
+static uint8_t BIP_Address[4] = { 0, 0, 0, 0 };
+static uint8_t BIP_Broadcast_Address[4] = { 0, 0, 0, 0 };
+
+/**
+ * @brief Convert a 4-byte IP address into a uint32_t value
+ * @param bip_address pointer to the 4-byte address
+ * @return 32-bit packed address
+ */
+uint32_t convertBIP_Address2uint32(const uint8_t *bip_address)
+{
+    return ((uint32_t)bip_address[0] << 24) | ((uint32_t)bip_address[1] << 16) |
+        ((uint32_t)bip_address[2] << 8) | ((uint32_t)bip_address[3]);
+}
+
+/**
+ * @brief Convert a uint32_t IP address into a 4-byte array
+ * @param ip packed IP address
+ * @param address destination buffer for the 4-byte address
+ */
+void convertUint32Address_2_uint8Address(uint32_t ip, uint8_t *address)
+{
+    address[0] = (uint8_t)(ip >> 24);
+    address[1] = (uint8_t)(ip >> 16);
+    address[2] = (uint8_t)(ip >> 8);
+    address[3] = (uint8_t)(ip >> 0);
+}
+
+/**
+ * @brief Store the active socket identifier used by the BACnet/IP layer
+ * @param sock_fd socket identifier
+ */
+void bip_set_socket(uint8_t sock_fd)
+{
+    BIP_Socket = sock_fd;
+}
+
+/**
+ * @brief Get the stored BACnet/IP socket identifier
+ * @return socket identifier
+ */
+uint8_t bip_socket(void)
+{
+    return BIP_Socket;
+}
+
+/**
+ * @brief Check whether the BACnet/IP socket state is valid
+ * @return true if the stored socket identifier is valid
+ */
+bool bip_valid(void)
+{
+    return (BIP_Socket < MAX_SOCK_NUM);
+}
+
+/**
+ * @brief Store the local IPv4 address used by BACnet/IP
+ * @param net_address pointer to the 4-byte local address
+ */
+void bip_set_addr(const uint8_t *net_address)
+{
+    uint8_t i;
+
+    for (i = 0; i < 4; i++) {
+        BIP_Address[i] = net_address[i];
+    }
+}
+
+/**
+ * @brief Get the stored local IPv4 address
+ * @return pointer to the 4-byte local address
+ */
+uint8_t *bip_get_addr(void)
+{
+    return BIP_Address;
+}
+
+/**
+ * @brief Store the broadcast IPv4 address used by BACnet/IP
+ * @param net_address pointer to the 4-byte broadcast address
+ */
+void bip_set_broadcast_addr(const uint8_t *net_address)
+{
+    uint8_t i;
+
+    for (i = 0; i < 4; i++) {
+        BIP_Broadcast_Address[i] = net_address[i];
+    }
+}
+
+/**
+ * @brief Get the stored broadcast IPv4 address
+ * @return pointer to the 4-byte broadcast address
+ */
+uint8_t *bip_get_broadcast_addr(void)
+{
+    return BIP_Broadcast_Address;
+}
+
+/**
+ * @brief Store the UDP port used by BACnet/IP
+ * @param port UDP port number
+ */
+void bip_set_port(uint16_t port)
+{
+    BIP_Port = port;
+}
+
+/**
+ * @brief Get the UDP port used by BACnet/IP
+ * @return UDP port number
+ */
+uint16_t bip_get_port(void)
+{
+    return BIP_Port;
+}
+
+/**
+ * @brief Decode a BACnet/IP MAC address into IPv4 address and port parts
+ * @param bac_addr source BACnet address
+ * @param address destination IPv4 address buffer
+ * @param port destination UDP port pointer
+ * @return number of bytes decoded from the MAC address
+ */
+static int bip_decode_bip_address(
+    const BACNET_ADDRESS *bac_addr, uint8_t *address, uint16_t *port)
+{
+    int len = 0;
+
+    if (bac_addr) {
+        memcpy(address, &bac_addr->mac[0], 4);
+        memcpy(port, &bac_addr->mac[4], 2);
+        len = 6;
+    }
+
+    return len;
+}
+
+/**
+ * @brief Send a BACnet NPDU over BACnet/IP
+ * @param dest destination BACnet address
+ * @param npdu_data NPDU metadata
+ * @param pdu payload buffer
+ * @param pdu_len payload length in bytes
+ * @return number of bytes sent, or -1 on error
+ */
+int bip_send_pdu(
+    BACNET_ADDRESS *dest,
+    BACNET_NPDU_DATA *npdu_data,
+    uint8_t *pdu,
+    unsigned pdu_len)
+{
+    uint8_t mtu[BIP_MPDU_MAX] = { 0 };
+    int mtu_len = 0;
+    int bytes_sent = 0;
+    uint8_t address[] = { 0, 0, 0, 0 };
+    uint16_t port = 0;
+    uint8_t i;
+
+    (void)npdu_data;
+
+    if (BIP_Socket >= MAX_SOCK_NUM) {
+        return -1;
+    }
+
+    mtu[0] = BVLL_TYPE_BACNET_IP;
+    if ((dest->net == BACNET_BROADCAST_NETWORK) ||
+        ((dest->net > 0) && (dest->len == 0)) || (dest->mac_len == 0)) {
+        for (i = 0; i < 4; i++) {
+            address[i] = BIP_Broadcast_Address[i];
+        }
+        port = BIP_Port;
+        mtu[1] = BVLC_ORIGINAL_BROADCAST_NPDU;
+    } else if (dest->mac_len == 6) {
+        bip_decode_bip_address(dest, address, &port);
+        mtu[1] = BVLC_ORIGINAL_UNICAST_NPDU;
+    } else {
+        return -1;
+    }
+
+    mtu_len = 2;
+    mtu_len += encode_unsigned16(&mtu[mtu_len], (uint16_t)(pdu_len + 4));
+    memcpy(&mtu[mtu_len], pdu, pdu_len);
+    mtu_len += (int)pdu_len;
+
+    bytes_sent = bip_socket_send(address, port, mtu, (uint16_t)mtu_len);
+
+    return bytes_sent;
+}
+
+/**
+ * @brief Receive a BACnet/IP NPDU and strip BVLC framing
+ * @param src source BACnet address
+ * @param pdu receive buffer for NPDU data
+ * @param max_pdu receive buffer size
+ * @param timeout receive timeout in milliseconds
+ * @return NPDU length in bytes, or 0 if no valid frame was received
+ */
+uint16_t bip_receive(
+    BACNET_ADDRESS *src, uint8_t *pdu, uint16_t max_pdu, unsigned timeout)
+{
+    int received_bytes = 0;
+    int max = 0;
+    uint16_t pdu_len = 0;
+    uint8_t src_addr[] = { 0, 0, 0, 0 };
+    uint16_t src_port = 0;
+    uint16_t i = 0;
+    int function = 0;
+
+    (void)timeout;
+
+    if (BIP_Socket >= MAX_SOCK_NUM) {
+        return 0;
+    }
+
+    received_bytes = bip_socket_receive(pdu, max_pdu, src_addr, &src_port);
+    if (received_bytes <= 0) {
+        return 0;
+    }
+
+    if (pdu[0] != BVLL_TYPE_BACNET_IP) {
+        return 0;
+    }
+
+    max = (int)max_pdu - received_bytes;
+    if (max > 0) {
+        if (max > 16) {
+            max = 16;
+        }
+        memset(&pdu[received_bytes], 0, (size_t)max);
+    }
+
+    if (bvlc_for_non_bbmd(src_addr, &src_port, pdu, (uint16_t)received_bytes) >
+        0) {
+        return 0;
+    }
+
+    function = pico_bvlc_get_function_code();
+    if ((function == BVLC_ORIGINAL_UNICAST_NPDU) ||
+        (function == BVLC_ORIGINAL_BROADCAST_NPDU)) {
+        if ((convertBIP_Address2uint32(src_addr) ==
+             convertBIP_Address2uint32(BIP_Address)) &&
+            (src_port == BIP_Port)) {
+            pdu_len = 0;
+        } else {
+            src->mac_len = 6;
+            memcpy(&src->mac[0], &src_addr, 4);
+            memcpy(&src->mac[4], &src_port, 2);
+            (void)decode_unsigned16(&pdu[2], &pdu_len);
+            pdu_len -= 4;
+            if (pdu_len < max_pdu) {
+                for (i = 0; i < pdu_len; i++) {
+                    pdu[i] = pdu[4 + i];
+                }
+            } else {
+                pdu_len = 0;
+            }
+        }
+    } else if (function == BVLC_FORWARDED_NPDU) {
+        memcpy(&src_addr, &pdu[4], 4);
+        memcpy(&src_port, &pdu[8], 2);
+        if ((convertBIP_Address2uint32(src_addr) ==
+             convertBIP_Address2uint32(BIP_Address)) &&
+            (src_port == BIP_Port)) {
+            pdu_len = 0;
+        } else {
+            src->mac_len = 6;
+            memcpy(&src->mac[0], &src_addr, 4);
+            memcpy(&src->mac[4], &src_port, 2);
+            (void)decode_unsigned16(&pdu[2], &pdu_len);
+            pdu_len -= 10;
+            if (pdu_len < max_pdu) {
+                for (i = 0; i < pdu_len; i++) {
+                    pdu[i] = pdu[10 + i];
+                }
+            } else {
+                pdu_len = 0;
+            }
+        }
+    }
+
+    return pdu_len;
+}
+
+/**
+ * @brief Build the local BACnet/IP address structure
+ * @param my_address destination BACnet address
+ */
+void bip_get_my_address(BACNET_ADDRESS *my_address)
+{
+    if (my_address) {
+        my_address->mac_len = 6;
+        memcpy(&my_address->mac[0], &BIP_Address[0], 4);
+        memcpy(&my_address->mac[4], &BIP_Port, 2);
+        my_address->net = 0;
+        my_address->len = 0;
+    }
+}
+
+/**
+ * @brief Build the BACnet/IP broadcast address structure
+ * @param dest destination BACnet address
+ */
+void bip_get_broadcast_address(BACNET_ADDRESS *dest)
+{
+    if (dest) {
+        dest->mac_len = 6;
+        memcpy(&dest->mac[0], &BIP_Broadcast_Address[0], 4);
+        memcpy(&dest->mac[4], &BIP_Port, 2);
+        dest->net = BACNET_BROADCAST_NETWORK;
+        dest->len = 0;
+    }
+}
+
+/**
+ * @brief Send a raw BACnet/IP MPDU to a specific host and port
+ * @param dest destination IPv4 address and port
+ * @param mtu raw BVLC/NPDU buffer
+ * @param mtu_len buffer length in bytes
+ * @return number of bytes sent, or -1 on error
+ */
+int bip_send_mpdu(
+    const BACNET_IP_ADDRESS *dest, const uint8_t *mtu, uint16_t mtu_len)
+{
+    return bip_socket_send(dest->address, dest->port, mtu, mtu_len);
+}

ports/esp32/src/bip.h

@@ -0,0 +1,226 @@
+/**
+ * @file
+ * @brief BACnet/IP datalink interface for the PlatformIO ESP32 port
+ * @author Kato Gangstad
+ */
+
+#ifndef M5STAMPLC_BIP_H
+#define M5STAMPLC_BIP_H
+
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+
+#include "bacnet/bacdef.h"
+#include "bacnet/npdu.h"
+#include "bacnet/datalink/bvlc.h"
+
+#define BIP_HEADER_MAX (1 + 1 + 2)
+#ifndef BIP_MPDU_MAX
+#define BIP_MPDU_MAX (BIP_HEADER_MAX + MAX_PDU)
+#endif
+
+#define BVLL_TYPE_BACNET_IP (0x81)
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @brief Initialize the UDP socket backend used by BACnet/IP
+ * @param port UDP port to bind
+ * @return true if the socket backend was initialized
+ */
+bool bip_socket_init(uint16_t port);
+
+/**
+ * @brief Send a raw UDP payload for BACnet/IP
+ * @param dest_addr destination IPv4 address
+ * @param dest_port destination UDP port
+ * @param mtu payload buffer
+ * @param mtu_len payload length
+ * @return number of bytes sent, or -1 on error
+ */
+int bip_socket_send(
+    const uint8_t *dest_addr,
+    uint16_t dest_port,
+    const uint8_t *mtu,
+    uint16_t mtu_len);
+/**
+ * @brief Receive a raw UDP payload for BACnet/IP
+ * @param buf receive buffer
+ * @param buf_len receive buffer size
+ * @param src_addr source IPv4 address
+ * @param src_port source UDP port
+ * @return number of bytes received
+ */
+int bip_socket_receive(
+    uint8_t *buf, uint16_t buf_len, uint8_t *src_addr, uint16_t *src_port);
+
+/**
+ * @brief Close the UDP socket backend used by BACnet/IP
+ */
+void bip_socket_cleanup(void);
+
+/**
+ * @brief Read the current local IP address and subnet mask
+ * @param local_addr destination for the local IPv4 address
+ * @param netmask destination for the subnet mask
+ * @return true if the network information was available
+ */
+bool bip_get_local_network_info(uint8_t *local_addr, uint8_t *netmask);
+
+/**
+ * @brief Initialize the BACnet/IP datalink
+ * @param port UDP port to use
+ * @return true if initialization succeeded
+ */
+bool bip_init(uint16_t port);
+
+/**
+ * @brief Refresh the local and broadcast interface addresses
+ */
+void bip_set_interface(void);
+
+/**
+ * @brief Shut down the BACnet/IP datalink
+ */
+void bip_cleanup(void);
+
+/**
+ * @brief Convert a 4-byte address into a 32-bit value
+ * @param bip_address pointer to IPv4 address bytes
+ * @return packed address value
+ */
+uint32_t convertBIP_Address2uint32(const uint8_t *bip_address);
+
+/**
+ * @brief Convert a 32-bit address into a 4-byte array
+ * @param ip packed address value
+ * @param address destination buffer
+ */
+void convertUint32Address_2_uint8Address(uint32_t ip, uint8_t *address);
+
+/**
+ * @brief Store the current socket identifier
+ * @param sock_fd socket identifier
+ */
+void bip_set_socket(uint8_t sock_fd);
+
+/**
+ * @brief Get the current socket identifier
+ * @return socket identifier
+ */
+uint8_t bip_socket(void);
+
+/**
+ * @brief Check whether the BACnet/IP datalink is valid
+ * @return true if the datalink is ready to use
+ */
+bool bip_valid(void);
+
+/**
+ * @brief Build the broadcast BACnet/IP address
+ * @param dest destination address structure
+ */
+void bip_get_broadcast_address(BACNET_ADDRESS *dest);
+
+/**
+ * @brief Build the local BACnet/IP address
+ * @param my_address destination address structure
+ */
+void bip_get_my_address(BACNET_ADDRESS *my_address);
+
+/**
+ * @brief Send a BACnet NPDU over BACnet/IP
+ * @param dest destination BACnet address
+ * @param npdu_data NPDU metadata
+ * @param pdu payload buffer
+ * @param pdu_len payload length in bytes
+ * @return number of bytes sent, or -1 on error
+ */
+int bip_send_pdu(
+    BACNET_ADDRESS *dest,
+    BACNET_NPDU_DATA *npdu_data,
+    uint8_t *pdu,
+    unsigned pdu_len);
+
+/**
+ * @brief Send a raw BACnet/IP MPDU
+ * @param dest destination IP address and port
+ * @param mtu raw buffer to send
+ * @param mtu_len buffer length in bytes
+ * @return number of bytes sent, or -1 on error
+ */
+int bip_send_mpdu(
+    const BACNET_IP_ADDRESS *dest, const uint8_t *mtu, uint16_t mtu_len);
+
+/**
+ * @brief Receive a BACnet/IP NPDU
+ * @param src source BACnet address
+ * @param pdu receive buffer
+ * @param max_pdu receive buffer size
+ * @param timeout receive timeout in milliseconds
+ * @return number of NPDU bytes received
+ */
+uint16_t bip_receive(
+    BACNET_ADDRESS *src, uint8_t *pdu, uint16_t max_pdu, unsigned timeout);
+
+/**
+ * @brief Store the UDP port used by BACnet/IP
+ * @param port UDP port number
+ */
+void bip_set_port(uint16_t port);
+
+/**
+ * @brief Get the UDP port used by BACnet/IP
+ * @return UDP port number
+ */
+uint16_t bip_get_port(void);
+
+/**
+ * @brief Store the local IPv4 address
+ * @param net_address pointer to the 4-byte address
+ */
+void bip_set_addr(const uint8_t *net_address);
+
+/**
+ * @brief Get the local IPv4 address
+ * @return pointer to the stored address
+ */
+uint8_t *bip_get_addr(void);
+
+/**
+ * @brief Store the IPv4 broadcast address
+ * @param net_address pointer to the 4-byte broadcast address
+ */
+void bip_set_broadcast_addr(const uint8_t *net_address);
+
+/**
+ * @brief Get the stored IPv4 broadcast address
+ * @return pointer to the stored broadcast address
+ */
+uint8_t *bip_get_broadcast_addr(void);
+
+/**
+ * @brief Resolve a host name into an address when supported
+ * @param host_name host name to resolve
+ * @return resolved address value, or 0 when unsupported
+ */
+long bip_getaddrbyname(const char *host_name);
+
+/**
+ * @brief Enable BACnet/IP debug behavior
+ */
+void bip_debug_enable(void);
+
+/**
+ * @brief Disable BACnet/IP debug behavior
+ */
+void bip_debug_disable(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif

ports/esp32/src/bip_init.c

@@ -1,56 +1,96 @@
-//
+/**
-// Copyleft  F.Chaxel 2017
+ * @file
-//
+ * @brief BACnet/IP initialization helpers for the PlatformIO ESP32 port
+ * @author Kato Gangstad
+ */
 
-#include "esp_log.h"
+#include <stdbool.h>
-#include "esp_wifi.h"
+#include <stdint.h>
 
-#include "lwip/sockets.h"
+#include "bip.h"
-#include "lwip/netdb.h"
 
-#include "bacnet/datalink/bip.h"
+static bool BIP_Debug = false;
 
-long bip_get_addr_by_name(const char *host_name)
+/**
+ * @brief Enable BACnet/IP debug mode
+ */
+void bip_debug_enable(void)
 {
+    BIP_Debug = true;
+}
+
+/**
+ * @brief Disable BACnet/IP debug mode
+ */
+void bip_debug_disable(void)
+{
+    BIP_Debug = false;
+}
+
+/**
+ * @brief Resolve a host name into an address when supported
+ * @param host_name host name to resolve
+ * @return resolved address, or 0 when unsupported by this port
+ */
+long bip_getaddrbyname(const char *host_name)
+{
+    (void)host_name;
     return 0;
 }
 
-void bip_set_interface(const char *ifname)
+/**
+ * @brief Refresh the local and broadcast BACnet/IP addresses
+ */
+void bip_set_interface(void)
 {
+    uint8_t local_address[] = { 0, 0, 0, 0 };
+    uint8_t broadcast_address[] = { 0, 0, 0, 0 };
+    uint8_t netmask[] = { 0, 0, 0, 0 };
+    uint8_t inverted_netmask[] = { 0, 0, 0, 0 };
+    int i;
+
+    if (!bip_get_local_network_info(local_address, netmask)) {
+        return;
     }
 
-void bip_cleanup(void)
+    bip_set_addr(local_address);
-{
+
-    close(bip_socket());
+    for (i = 0; i < 4; i++) {
-    bip_set_socket(-1);
+        inverted_netmask[i] = (uint8_t)~netmask[i];
+        broadcast_address[i] =
+            (uint8_t)(local_address[i] | inverted_netmask[i]);
     }
 
-bool bip_init(char *ifname)
+    bip_set_broadcast_addr(broadcast_address);
+}
+
+/**
+ * @brief Initialize the BACnet/IP datalink for the selected UDP port
+ * @param port UDP port number
+ * @return true if initialization succeeded
+ */
+bool bip_init(uint16_t port)
 {
-    tcpip_adapter_ip_info_t ip_info = { 0 };
+    (void)BIP_Debug;
 
-    int value = 1;
+    if (!bip_socket_init(port)) {
+        return false;
+    }
 
-    tcpip_adapter_get_ip_info(TCPIP_ADAPTER_IF_STA, &ip_info);
+    bip_set_interface();
+    bip_set_port(port);
 
-    bip_set_interface(ifname);
+    bip_set_socket(0);
-    bip_set_port(0xBAC0U);
-    bip_set_addr(ip_info.ip.addr);
-    bip_set_broadcast_addr(
-        (ip_info.ip.addr & ip_info.netmask.addr) | (~ip_info.netmask.addr));
-
-    int sock = socket(PF_INET, SOCK_DGRAM, IPPROTO_IP);
-    struct sockaddr_in saddr = { 0 };
-
-    saddr.sin_family = PF_INET;
-    saddr.sin_port = htons(0xBAC0U);
-    saddr.sin_addr.s_addr = htonl(INADDR_ANY);
-    bind(sock, (struct sockaddr *)&saddr, sizeof(struct sockaddr_in));
-
-    setsockopt(sock, SOL_SOCKET, SO_BROADCAST, (char *)&value, sizeof(value));
-    setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (char *)&value, sizeof(value));
-
-    bip_set_socket(sock);
 
     return true;
 }
+
+/**
+ * @brief Shut down the BACnet/IP datalink
+ */
+void bip_cleanup(void)
+{
+    if (bip_valid()) {
+        bip_socket_cleanup();
+    }
+}

ports/esp32/src/bip_socket.cpp

@@ -0,0 +1,178 @@
+/**
+ * @file
+ * @brief UDP socket bridge used by BACnet/IP on the PlatformIO ESP32 port
+ * @author Kato Gangstad
+ */
+
+#include <Arduino.h>
+#include <WiFi.h>
+#include <WiFiUdp.h>
+#if defined(USE_ETH_INTERFACE) && (USE_ETH_INTERFACE)
+#include <ETH.h>
+#endif
+
+extern "C" {
+#include "bip.h"
+}
+
+static WiFiUDP BipUdp;
+static bool BipSocketOpen = false;
+
+/**
+ * @brief Check whether the selected network interface is up
+ * @return true if the interface is connected
+ */
+static bool network_connected(void)
+{
+#if defined(USE_ETH_INTERFACE) && (USE_ETH_INTERFACE)
+    return ETH.linkUp();
+#else
+    return (WiFi.status() == WL_CONNECTED);
+#endif
+}
+
+/**
+ * @brief Get the local IP address for the selected network interface
+ * @return local IP address
+ */
+static IPAddress network_local_ip(void)
+{
+#if defined(USE_ETH_INTERFACE) && (USE_ETH_INTERFACE)
+    return ETH.localIP();
+#else
+    return WiFi.localIP();
+#endif
+}
+
+/**
+ * @brief Get the subnet mask for the selected network interface
+ * @return subnet mask
+ */
+static IPAddress network_subnet_mask(void)
+{
+#if defined(USE_ETH_INTERFACE) && (USE_ETH_INTERFACE)
+    return ETH.subnetMask();
+#else
+    return WiFi.subnetMask();
+#endif
+}
+
+/**
+ * @brief Initialize the UDP socket used by BACnet/IP
+ * @param port UDP port to bind
+ * @return true if the socket was opened successfully
+ */
+extern "C" bool bip_socket_init(uint16_t port)
+{
+    if (!network_connected()) {
+        return false;
+    }
+
+    BipUdp.stop();
+    BipSocketOpen = (BipUdp.begin(port) == 1);
+    return BipSocketOpen;
+}
+
+/**
+ * @brief Send a UDP packet for BACnet/IP
+ * @param dest_addr destination IPv4 address
+ * @param dest_port destination UDP port
+ * @param mtu payload buffer
+ * @param mtu_len payload length in bytes
+ * @return number of bytes sent, or -1 on error
+ */
+extern "C" int bip_socket_send(
+    const uint8_t *dest_addr,
+    uint16_t dest_port,
+    const uint8_t *mtu,
+    uint16_t mtu_len)
+{
+    if (!BipSocketOpen || !dest_addr || !mtu || (mtu_len == 0U)) {
+        return -1;
+    }
+
+    IPAddress ip(dest_addr[0], dest_addr[1], dest_addr[2], dest_addr[3]);
+    if (!BipUdp.beginPacket(ip, dest_port)) {
+        return -1;
+    }
+
+    size_t written = BipUdp.write(mtu, mtu_len);
+    if (!BipUdp.endPacket()) {
+        return -1;
+    }
+
+    return (written == mtu_len) ? (int)written : -1;
+}
+
+/**
+ * @brief Receive a UDP packet for BACnet/IP
+ * @param buf receive buffer
+ * @param buf_len receive buffer size
+ * @param src_addr source IPv4 address
+ * @param src_port source UDP port
+ * @return number of bytes received
+ */
+extern "C" int bip_socket_receive(
+    uint8_t *buf, uint16_t buf_len, uint8_t *src_addr, uint16_t *src_port)
+{
+    if (!BipSocketOpen || !buf || !src_addr || !src_port || (buf_len == 0U)) {
+        return 0;
+    }
+
+    int packet_size = BipUdp.parsePacket();
+    if (packet_size <= 0) {
+        return 0;
+    }
+
+    IPAddress remote = BipUdp.remoteIP();
+    src_addr[0] = remote[0];
+    src_addr[1] = remote[1];
+    src_addr[2] = remote[2];
+    src_addr[3] = remote[3];
+    *src_port = BipUdp.remotePort();
+
+    int to_read = packet_size;
+    if (to_read > (int)buf_len) {
+        to_read = (int)buf_len;
+    }
+
+    int len = BipUdp.read(buf, to_read);
+    return (len > 0) ? len : 0;
+}
+
+/**
+ * @brief Close the UDP socket used by BACnet/IP
+ */
+extern "C" void bip_socket_cleanup(void)
+{
+    BipUdp.stop();
+    BipSocketOpen = false;
+}
+
+/**
+ * @brief Get the local network address and subnet mask
+ * @param local_addr destination IPv4 address buffer
+ * @param netmask destination subnet mask buffer
+ * @return true if network information was available
+ */
+extern "C" bool
+bip_get_local_network_info(uint8_t *local_addr, uint8_t *netmask)
+{
+    if (!local_addr || !netmask || !network_connected()) {
+        return false;
+    }
+
+    IPAddress ip = network_local_ip();
+    IPAddress mask = network_subnet_mask();
+    local_addr[0] = ip[0];
+    local_addr[1] = ip[1];
+    local_addr[2] = ip[2];
+    local_addr[3] = ip[3];
+
+    netmask[0] = mask[0];
+    netmask[1] = mask[1];
+    netmask[2] = mask[2];
+    netmask[3] = mask[3];
+
+    return true;
+}

ports/esp32/src/bo.c

@@ -1,433 +0,0 @@
-/**************************************************************************
- *
- * Copyright (C) 2005 Steve Karg <skarg@users.sourceforge.net>
- *
- * SPDX-License-Identifier: MIT
- *
- *********************************************************************/
-
-/* Binary Output Objects - customize for your use */
-
-#include <stdbool.h>
-#include <stdint.h>
-#include <stdio.h>
-#include "bacnet/bacdef.h"
-#include "bacnet/bacdcode.h"
-#include "bacnet/bacenum.h"
-#include "bacnet/bacapp.h"
-#include "bacnet/config.h" /* the custom stuff */
-#include "bacnet/rp.h"
-#include "bacnet/wp.h"
-#include "bacnet/basic/object/bo.h"
-#include "bacnet/basic/services.h"
-
-#ifndef MAX_BINARY_OUTPUTS
-#define MAX_BINARY_OUTPUTS 1
-#endif
-
-/* When all the priorities are level null, the present value returns */
-/* the Relinquish Default value */
-#define RELINQUISH_DEFAULT BINARY_INACTIVE
-/* Here is our Priority Array.*/
-static BACNET_BINARY_PV Binary_Output_Level[MAX_BINARY_OUTPUTS]
-                                           [BACNET_MAX_PRIORITY];
-/* Writable out-of-service allows others to play with our Present Value */
-/* without changing the physical output */
-static bool Out_Of_Service[MAX_BINARY_OUTPUTS];
-
-/* These three arrays are used by the ReadPropertyMultiple handler */
-static const int32_t Binary_Output_Properties_Required[] = { PROP_OBJECT_IDENTIFIER,
-    PROP_OBJECT_NAME, PROP_OBJECT_TYPE, PROP_PRESENT_VALUE, PROP_STATUS_FLAGS,
-    PROP_EVENT_STATE, PROP_OUT_OF_SERVICE, PROP_POLARITY, PROP_PRIORITY_ARRAY,
-    PROP_RELINQUISH_DEFAULT, -1 };
-
-static const int32_t Binary_Output_Properties_Optional[] = { PROP_DESCRIPTION,
-    PROP_ACTIVE_TEXT, PROP_INACTIVE_TEXT, -1 };
-
-static const int32_t Binary_Output_Properties_Proprietary[] = { -1 };
-
-void Binary_Output_Property_Lists(
-    const int32_t **pRequired, const int32_t **pOptional, const int32_t **pProprietary)
-{
-    if (pRequired)
-        *pRequired = Binary_Output_Properties_Required;
-    if (pOptional)
-        *pOptional = Binary_Output_Properties_Optional;
-    if (pProprietary)
-        *pProprietary = Binary_Output_Properties_Proprietary;
-
-    return;
-}
-
-void Binary_Output_Init(void)
-{
-    unsigned i, j;
-    static bool initialized = false;
-
-    if (!initialized) {
-        initialized = true;
-
-        /* initialize all the analog output priority arrays to NULL */
-        for (i = 0; i < MAX_BINARY_OUTPUTS; i++) {
-            for (j = 0; j < BACNET_MAX_PRIORITY; j++) {
-                Binary_Output_Level[i][j] = BINARY_NULL;
-            }
-        }
-    }
-
-    return;
-}
-
-/* we simply have 0-n object instances.  Yours might be */
-/* more complex, and then you need validate that the */
-/* given instance exists */
-bool Binary_Output_Valid_Instance(uint32_t object_instance)
-{
-    if (object_instance < MAX_BINARY_OUTPUTS)
-        return true;
-
-    return false;
-}
-
-/* we simply have 0-n object instances.  Yours might be */
-/* more complex, and then count how many you have */
-unsigned Binary_Output_Count(void)
-{
-    return MAX_BINARY_OUTPUTS;
-}
-
-/* we simply have 0-n object instances.  Yours might be */
-/* more complex, and then you need to return the instance */
-/* that correlates to the correct index */
-uint32_t Binary_Output_Index_To_Instance(unsigned index)
-{
-    return index;
-}
-
-/* we simply have 0-n object instances.  Yours might be */
-/* more complex, and then you need to return the index */
-/* that correlates to the correct instance number */
-unsigned Binary_Output_Instance_To_Index(uint32_t object_instance)
-{
-    unsigned index = MAX_BINARY_OUTPUTS;
-
-    if (object_instance < MAX_BINARY_OUTPUTS)
-        index = object_instance;
-
-    return index;
-}
-
-BACNET_BINARY_PV Binary_Output_Present_Value(uint32_t object_instance)
-{
-    BACNET_BINARY_PV value = RELINQUISH_DEFAULT;
-    unsigned index = 0;
-    unsigned i = 0;
-
-    index = Binary_Output_Instance_To_Index(object_instance);
-    if (index < MAX_BINARY_OUTPUTS) {
-        for (i = 0; i < BACNET_MAX_PRIORITY; i++) {
-            if (Binary_Output_Level[index][i] != BINARY_NULL) {
-                value = Binary_Output_Level[index][i];
-                break;
-            }
-        }
-    }
-
-    return value;
-}
-
-bool Binary_Output_Out_Of_Service(uint32_t object_instance)
-{
-    bool value = false;
-    unsigned index = 0;
-
-    index = Binary_Output_Instance_To_Index(object_instance);
-    if (index < MAX_BINARY_OUTPUTS) {
-        value = Out_Of_Service[index];
-    }
-
-    return value;
-}
-
-/* note: the object name must be unique within this device */
-
-bool Binary_Output_Object_Name(
-    uint32_t object_instance, BACNET_CHARACTER_STRING *object_name)
-{
-    static char text[32] = "";
-    bool status = false;
-
-    if (object_instance == 0)
-        status = characterstring_init_ansi(object_name, "Led");
-    else {
-        if (object_instance < MAX_BINARY_OUTPUTS) {
-            snprintf(text, sizeof(text), "BINARY OUTPUT %lu",
-                (unsigned long)object_instance);
-            status = characterstring_init_ansi(object_name, text);
-        }
-    }
-    return status;
-}
-
-/* return apdu len, or BACNET_STATUS_ERROR on error */
-int Binary_Output_Read_Property(BACNET_READ_PROPERTY_DATA *rpdata)
-{
-    int len = 0;
-    int apdu_len = 0; /* return value */
-    BACNET_BIT_STRING bit_string;
-    BACNET_CHARACTER_STRING char_string;
-    BACNET_BINARY_PV present_value = BINARY_INACTIVE;
-    BACNET_POLARITY polarity = POLARITY_NORMAL;
-    unsigned object_index = 0;
-    unsigned i = 0;
-    bool state = false;
-    uint8_t *apdu = NULL;
-
-    if ((rpdata == NULL) || (rpdata->application_data == NULL) ||
-        (rpdata->application_data_len == 0)) {
-        return 0;
-    }
-    apdu = rpdata->application_data;
-    switch (rpdata->object_property) {
-        case PROP_OBJECT_IDENTIFIER:
-            apdu_len = encode_application_object_id(
-                &apdu[0], OBJECT_BINARY_OUTPUT, rpdata->object_instance);
-            break;
-            /* note: Name and Description don't have to be the same.
-               You could make Description writable and different */
-        case PROP_OBJECT_NAME:
-        case PROP_DESCRIPTION:
-            Binary_Output_Object_Name(rpdata->object_instance, &char_string);
-            apdu_len =
-                encode_application_character_string(&apdu[0], &char_string);
-            break;
-        case PROP_OBJECT_TYPE:
-            apdu_len =
-                encode_application_enumerated(&apdu[0], OBJECT_BINARY_OUTPUT);
-            break;
-        case PROP_PRESENT_VALUE:
-            present_value =
-                Binary_Output_Present_Value(rpdata->object_instance);
-            apdu_len = encode_application_enumerated(&apdu[0], present_value);
-            break;
-        case PROP_STATUS_FLAGS:
-            /* note: see the details in the standard on how to use these */
-            bitstring_init(&bit_string);
-            bitstring_set_bit(&bit_string, STATUS_FLAG_IN_ALARM, false);
-            bitstring_set_bit(&bit_string, STATUS_FLAG_FAULT, false);
-            bitstring_set_bit(&bit_string, STATUS_FLAG_OVERRIDDEN, false);
-            bitstring_set_bit(&bit_string, STATUS_FLAG_OUT_OF_SERVICE, false);
-            apdu_len = encode_application_bitstring(&apdu[0], &bit_string);
-            break;
-        case PROP_EVENT_STATE:
-            /* note: see the details in the standard on how to use this */
-            apdu_len =
-                encode_application_enumerated(&apdu[0], EVENT_STATE_NORMAL);
-            break;
-        case PROP_OUT_OF_SERVICE:
-            object_index =
-                Binary_Output_Instance_To_Index(rpdata->object_instance);
-            state = Out_Of_Service[object_index];
-            apdu_len = encode_application_boolean(&apdu[0], state);
-            break;
-        case PROP_POLARITY:
-            apdu_len = encode_application_enumerated(&apdu[0], polarity);
-            break;
-        case PROP_PRIORITY_ARRAY:
-            /* Array element zero is the number of elements in the array */
-            if (rpdata->array_index == 0)
-                apdu_len =
-                    encode_application_unsigned(&apdu[0], BACNET_MAX_PRIORITY);
-            /* if no index was specified, then try to encode the entire list */
-            /* into one packet. */
-            else if (rpdata->array_index == BACNET_ARRAY_ALL) {
-                object_index =
-                    Binary_Output_Instance_To_Index(rpdata->object_instance);
-                for (i = 0; i < BACNET_MAX_PRIORITY; i++) {
-                    /* FIXME: check if we have room before adding it to APDU */
-                    if (Binary_Output_Level[object_index][i] == BINARY_NULL)
-                        len = encode_application_null(&apdu[apdu_len]);
-                    else {
-                        present_value = Binary_Output_Level[object_index][i];
-                        len = encode_application_enumerated(
-                            &apdu[apdu_len], present_value);
-                    }
-                    /* add it if we have room */
-                    if ((apdu_len + len) < MAX_APDU)
-                        apdu_len += len;
-                    else {
-                        rpdata->error_code =
-                            ERROR_CODE_ABORT_SEGMENTATION_NOT_SUPPORTED;
-                        apdu_len = BACNET_STATUS_ABORT;
-                        break;
-                    }
-                }
-            } else {
-                object_index =
-                    Binary_Output_Instance_To_Index(rpdata->object_instance);
-                if (rpdata->array_index <= BACNET_MAX_PRIORITY) {
-                    if (Binary_Output_Level[object_index][rpdata->array_index -
-                            1] == BINARY_NULL)
-                        apdu_len = encode_application_null(&apdu[apdu_len]);
-                    else {
-                        present_value =
-                            Binary_Output_Level[object_index]
-                                               [rpdata->array_index - 1];
-                        apdu_len = encode_application_enumerated(
-                            &apdu[apdu_len], present_value);
-                    }
-                } else {
-                    rpdata->error_class = ERROR_CLASS_PROPERTY;
-                    rpdata->error_code = ERROR_CODE_INVALID_ARRAY_INDEX;
-                    apdu_len = BACNET_STATUS_ERROR;
-                }
-            }
-
-            break;
-        case PROP_RELINQUISH_DEFAULT:
-            present_value = RELINQUISH_DEFAULT;
-            apdu_len = encode_application_enumerated(&apdu[0], present_value);
-            break;
-        case PROP_ACTIVE_TEXT:
-            characterstring_init_ansi(&char_string, "on");
-            apdu_len =
-                encode_application_character_string(&apdu[0], &char_string);
-            break;
-        case PROP_INACTIVE_TEXT:
-            characterstring_init_ansi(&char_string, "off");
-            apdu_len =
-                encode_application_character_string(&apdu[0], &char_string);
-            break;
-        default:
-            rpdata->error_class = ERROR_CLASS_PROPERTY;
-            rpdata->error_code = ERROR_CODE_UNKNOWN_PROPERTY;
-            apdu_len = BACNET_STATUS_ERROR;
-            break;
-    }
-    /*  only array properties can have array options */
-    if ((apdu_len >= 0) && (rpdata->object_property != PROP_PRIORITY_ARRAY) &&
-        (rpdata->array_index != BACNET_ARRAY_ALL)) {
-        rpdata->error_class = ERROR_CLASS_PROPERTY;
-        rpdata->error_code = ERROR_CODE_PROPERTY_IS_NOT_AN_ARRAY;
-        apdu_len = BACNET_STATUS_ERROR;
-    }
-
-    return apdu_len;
-}
-
-/* returns true if successful */
-bool Binary_Output_Write_Property(BACNET_WRITE_PROPERTY_DATA *wp_data)
-{
-    bool status = false; /* return value */
-    unsigned int object_index = 0;
-    unsigned int priority = 0;
-    BACNET_BINARY_PV level = BINARY_NULL;
-    int len = 0;
-    BACNET_APPLICATION_DATA_VALUE value = { 0 };
-
-    /* decode the some of the request */
-    len = bacapp_decode_application_data(
-        wp_data->application_data, wp_data->application_data_len, &value);
-    /* FIXME: len < application_data_len: more data? */
-    if (len < 0) {
-        /* error while decoding - a value larger than we can handle */
-        wp_data->error_class = ERROR_CLASS_PROPERTY;
-        wp_data->error_code = ERROR_CODE_VALUE_OUT_OF_RANGE;
-        return false;
-    }
-    if ((wp_data->object_property != PROP_PRIORITY_ARRAY) &&
-        (wp_data->array_index != BACNET_ARRAY_ALL)) {
-        /*  only array properties can have array options */
-        wp_data->error_class = ERROR_CLASS_PROPERTY;
-        wp_data->error_code = ERROR_CODE_PROPERTY_IS_NOT_AN_ARRAY;
-        return false;
-    }
-    switch (wp_data->object_property) {
-        case PROP_PRESENT_VALUE:
-            if (value.tag == BACNET_APPLICATION_TAG_ENUMERATED) {
-                priority = wp_data->priority;
-                /* Command priority 6 is reserved for use by Minimum On/Off
-                   algorithm and may not be used for other purposes in any
-                   object. */
-                if (priority && (priority <= BACNET_MAX_PRIORITY) &&
-                    (priority != 6 /* reserved */) &&
-                    (value.type.Enumerated <= MAX_BINARY_PV)) {
-                    level = (BACNET_BINARY_PV)value.type.Enumerated;
-                    object_index = Binary_Output_Instance_To_Index(
-                        wp_data->object_instance);
-                    priority--;
-                    Binary_Output_Level[object_index][priority] = level;
-                    /* Note: you could set the physical output here if we
-                       are the highest priority.
-                       However, if Out of Service is TRUE, then don't set the
-                       physical output.  This comment may apply to the
-                       main loop (i.e. check out of service before changing
-                       output) */
-                    status = true;
-                } else if (priority == 6) {
-                    /* Command priority 6 is reserved for use by Minimum On/Off
-                       algorithm and may not be used for other purposes in any
-                       object. */
-                    wp_data->error_class = ERROR_CLASS_PROPERTY;
-                    wp_data->error_code = ERROR_CODE_WRITE_ACCESS_DENIED;
-                } else {
-                    wp_data->error_class = ERROR_CLASS_PROPERTY;
-                    wp_data->error_code = ERROR_CODE_VALUE_OUT_OF_RANGE;
-                }
-            } else {
-                status = write_property_type_valid(wp_data, &value,
-                    BACNET_APPLICATION_TAG_NULL);
-                if (status) {
-                    level = BINARY_NULL;
-                    object_index = Binary_Output_Instance_To_Index(
-                        wp_data->object_instance);
-                    priority = wp_data->priority;
-                    if (priority && (priority <= BACNET_MAX_PRIORITY)) {
-                        priority--;
-                        Binary_Output_Level[object_index][priority] = level;
-                        /* Note: you could set the physical output here to the
-                           next highest priority, or to the relinquish default
-                           if no priorities are set. However, if Out of Service
-                           is TRUE, then don't set the physical output.  This
-                           comment may apply to the
-                           main loop (i.e. check out of service before changing
-                           output) */
-                    } else {
-                        status = false;
-                        wp_data->error_class = ERROR_CLASS_PROPERTY;
-                        wp_data->error_code = ERROR_CODE_VALUE_OUT_OF_RANGE;
-                    }
-                }
-            }
-            break;
-        case PROP_OUT_OF_SERVICE:
-            status = write_property_type_valid(wp_data, &value,
-                BACNET_APPLICATION_TAG_BOOLEAN);
-            if (status) {
-                object_index =
-                    Binary_Output_Instance_To_Index(wp_data->object_instance);
-                Out_Of_Service[object_index] = value.type.Boolean;
-            }
-            break;
-        case PROP_OBJECT_IDENTIFIER:
-        case PROP_OBJECT_NAME:
-        case PROP_OBJECT_TYPE:
-        case PROP_STATUS_FLAGS:
-        case PROP_RELIABILITY:
-        case PROP_EVENT_STATE:
-        case PROP_POLARITY:
-        case PROP_PRIORITY_ARRAY:
-        case PROP_RELINQUISH_DEFAULT:
-        case PROP_ACTIVE_TEXT:
-        case PROP_INACTIVE_TEXT:
-            wp_data->error_class = ERROR_CLASS_PROPERTY;
-            wp_data->error_code = ERROR_CODE_WRITE_ACCESS_DENIED;
-            break;
-        default:
-            wp_data->error_class = ERROR_CLASS_PROPERTY;
-            wp_data->error_code = ERROR_CODE_UNKNOWN_PROPERTY;
-            break;
-    }
-
-    return status;
-}

ports/esp32/src/bo.h

@@ -1,118 +0,0 @@
-/**************************************************************************
-*
-* Copyright (C) 2005 Steve Karg <skarg@users.sourceforge.net>
-*
-* SPDX-License-Identifier: MIT
-*
-*********************************************************************/
-#ifndef BO_H
-#define BO_H
-
-#include <stdbool.h>
-#include <stdint.h>
-#include "bacnet/bacdef.h"
-#include "bacnet/bacerror.h"
-#include "bacnet/rp.h"
-#include "bacnet/wp.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif /* __cplusplus */
-
-    void Binary_Output_Init(
-        void);
-
-    void Binary_Output_Property_Lists(
-        const int32_t **pRequired,
-        const int32_t **pOptional,
-        const int32_t **pProprietary);
-
-    bool Binary_Output_Valid_Instance(
-        uint32_t object_instance);
-    unsigned Binary_Output_Count(
-        void);
-    uint32_t Binary_Output_Index_To_Instance(
-        unsigned index);
-    unsigned Binary_Output_Instance_To_Index(
-        uint32_t instance);
-    bool Binary_Output_Object_Instance_Add(
-        uint32_t instance);
-
-    bool Binary_Output_Object_Name(
-        uint32_t object_instance,
-        BACNET_CHARACTER_STRING * object_name);
-    bool Binary_Output_Name_Set(
-        uint32_t object_instance,
-        char *new_name);
-
-    const char *Binary_Output_Description(
-        uint32_t instance);
-    bool Binary_Output_Description_Set(
-        uint32_t instance,
-        const char *new_name);
-
-    const char *Binary_Output_Inactive_Text(
-        uint32_t instance);
-    bool Binary_Output_Inactive_Text_Set(
-        uint32_t instance,
-        char *new_name);
-    char *Binary_Output_Active_Text(
-        uint32_t instance);
-    bool Binary_Output_Active_Text_Set(
-        uint32_t instance,
-        char *new_name);
-
-    BACNET_BINARY_PV Binary_Output_Present_Value(
-        uint32_t instance);
-    bool Binary_Output_Present_Value_Set(
-        uint32_t instance,
-        BACNET_BINARY_PV binary_value,
-        unsigned priority);
-    bool Binary_Output_Present_Value_Relinquish(
-        uint32_t instance,
-        unsigned priority);
-    unsigned Binary_Output_Present_Value_Priority(
-        uint32_t object_instance);
-
-    BACNET_POLARITY Binary_Output_Polarity(
-        uint32_t instance);
-    bool Binary_Output_Polarity_Set(
-        uint32_t object_instance,
-        BACNET_POLARITY polarity);
-
-    bool Binary_Output_Out_Of_Service(
-        uint32_t instance);
-    void Binary_Output_Out_Of_Service_Set(
-        uint32_t object_instance,
-        bool value);
-
-    BACNET_BINARY_PV Binary_Output_Relinquish_Default(
-        uint32_t object_instance);
-    bool Binary_Output_Relinquish_Default_Set(
-        uint32_t object_instance,
-        BACNET_BINARY_PV value);
-
-    bool Binary_Output_Encode_Value_List(
-        uint32_t object_instance,
-        BACNET_PROPERTY_VALUE * value_list);
-    bool Binary_Output_Change_Of_Value(
-        uint32_t instance);
-    void Binary_Output_Change_Of_Value_Clear(
-        uint32_t instance);
-
-    int Binary_Output_Read_Property(
-        BACNET_READ_PROPERTY_DATA * rpdata);
-    bool Binary_Output_Write_Property(
-        BACNET_WRITE_PROPERTY_DATA * wp_data);
-
-    uint32_t Binary_Output_Create(
-        uint32_t object_instance);
-    bool Binary_Output_Delete(
-        uint32_t object_instance);
-    void Binary_Output_Cleanup(
-        void);
-
-#ifdef __cplusplus
-}
-#endif /* __cplusplus */
-#endif

ports/esp32/src/bvlc.c

@@ -0,0 +1,164 @@
+/**
+ * @file
+ * @brief BACnet Virtual Link Control implementation for the PlatformIO ESP32
+ * port
+ * @author Kato Gangstad
+ */
+
+#include <stdbool.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "bip.h"
+#include "bvlc.h"
+#include "bacnet/bacint.h"
+
+#define BVLC_RESULT 0
+#define BVLC_WRITE_BROADCAST_DISTRIBUTION_TABLE 1
+#define BVLC_READ_BROADCAST_DIST_TABLE 2
+#define BVLC_READ_BROADCAST_DIST_TABLE_ACK 3
+#define BVLC_FORWARDED_NPDU 4
+#define BVLC_REGISTER_FOREIGN_DEVICE 5
+#define BVLC_READ_FOREIGN_DEVICE_TABLE 6
+#define BVLC_READ_FOREIGN_DEVICE_TABLE_ACK 7
+#define BVLC_DELETE_FOREIGN_DEVICE_TABLE_ENTRY 8
+#define BVLC_DISTRIBUTE_BROADCAST_TO_NETWORK 9
+#define BVLC_ORIGINAL_UNICAST_NPDU 10
+#define BVLC_ORIGINAL_BROADCAST_NPDU 11
+#define BVLC_SECURE_BVLL 12
+
+#define BVLC_RESULT_WRITE_BROADCAST_DISTRIBUTION_TABLE_NAK 0x0010
+#define BVLC_RESULT_READ_BROADCAST_DISTRIBUTION_TABLE_NAK 0x0020
+#define BVLC_RESULT_REGISTER_FOREIGN_DEVICE_NAK 0X0030
+#define BVLC_RESULT_READ_FOREIGN_DEVICE_TABLE_NAK 0x0040
+#define BVLC_RESULT_DELETE_FOREIGN_DEVICE_TABLE_ENTRY_NAK 0x0050
+#define BVLC_RESULT_DISTRIBUTE_BROADCAST_TO_NETWORK_NAK 0x0060
+
+static BACNET_BVLC_RESULT BVLC_Result_Code = BVLC_RESULT_SUCCESSFUL_COMPLETION;
+static BACNET_BVLC_FUNCTION BVLC_Function_Code = BVLC_RESULT;
+
+/**
+ * @brief Encode a BVLC result message
+ * @param pdu destination buffer, or NULL for length-only use
+ * @param result_code BVLC result code to encode
+ * @return encoded BVLC message length
+ */
+static int bvlc_encode_bvlc_result(uint8_t *pdu, BACNET_BVLC_RESULT result_code)
+{
+    if (pdu) {
+        pdu[0] = BVLL_TYPE_BACNET_IP;
+        pdu[1] = BVLC_RESULT;
+        encode_unsigned16(&pdu[2], 6);
+        encode_unsigned16(&pdu[4], (uint16_t)result_code);
+    }
+
+    return 6;
+}
+
+/**
+ * @brief Send a raw BVLC frame to the destination host
+ * @param dest_addr destination IPv4 address
+ * @param dest_port destination UDP port
+ * @param mtu raw BVLC frame buffer
+ * @param mtu_len frame length in bytes
+ * @return number of bytes sent, or -1 on error
+ */
+static int bvlc_send_mpdu(
+    const uint8_t *dest_addr,
+    const uint16_t *dest_port,
+    uint8_t *mtu,
+    uint16_t mtu_len)
+{
+    int bytes_sent = 0;
+
+    if (!bip_valid()) {
+        return -1;
+    }
+
+    bytes_sent = bip_socket_send(dest_addr, *dest_port, mtu, mtu_len);
+
+    return bytes_sent;
+}
+
+/**
+ * @brief Send a BVLC result response
+ * @param dest_addr destination IPv4 address
+ * @param dest_port destination UDP port
+ * @param result_code BVLC result code to report
+ */
+static void bvlc_send_result(
+    const uint8_t *dest_addr,
+    const uint16_t *dest_port,
+    BACNET_BVLC_RESULT result_code)
+{
+    uint8_t mtu[BIP_MPDU_MAX] = { 0 };
+    uint16_t mtu_len = 0;
+
+    mtu_len = (uint16_t)bvlc_encode_bvlc_result(&mtu[0], result_code);
+    bvlc_send_mpdu(dest_addr, dest_port, mtu, mtu_len);
+}
+
+/**
+ * @brief Handle non-BBMD BVLC functions for this port
+ * @param addr source IPv4 address
+ * @param port source UDP port
+ * @param npdu received BVLC frame buffer
+ * @param received_bytes frame length in bytes
+ * @return non-zero when the frame was consumed by BVLC handling
+ */
+uint16_t bvlc_for_non_bbmd(
+    uint8_t *addr, uint16_t *port, uint8_t *npdu, uint16_t received_bytes)
+{
+    uint16_t result_code = 0;
+
+    if (received_bytes >= 1) {
+        BVLC_Function_Code = npdu[1];
+        switch (BVLC_Function_Code) {
+            case BVLC_RESULT:
+                if (received_bytes >= 6) {
+                    (void)decode_unsigned16(&npdu[4], &result_code);
+                    BVLC_Result_Code = (BACNET_BVLC_RESULT)result_code;
+                    fprintf(stderr, "BVLC: Result Code=%d\n", BVLC_Result_Code);
+                    result_code = 0;
+                }
+                break;
+            case BVLC_WRITE_BROADCAST_DISTRIBUTION_TABLE:
+                result_code =
+                    BVLC_RESULT_WRITE_BROADCAST_DISTRIBUTION_TABLE_NAK;
+                break;
+            case BVLC_READ_BROADCAST_DIST_TABLE:
+                result_code = BVLC_RESULT_READ_BROADCAST_DISTRIBUTION_TABLE_NAK;
+                break;
+            case BVLC_REGISTER_FOREIGN_DEVICE:
+                result_code = BVLC_RESULT_REGISTER_FOREIGN_DEVICE_NAK;
+                break;
+            case BVLC_READ_FOREIGN_DEVICE_TABLE:
+                result_code = BVLC_RESULT_READ_FOREIGN_DEVICE_TABLE_NAK;
+                break;
+            case BVLC_DELETE_FOREIGN_DEVICE_TABLE_ENTRY:
+                result_code = BVLC_RESULT_DELETE_FOREIGN_DEVICE_TABLE_ENTRY_NAK;
+                break;
+            case BVLC_DISTRIBUTE_BROADCAST_TO_NETWORK:
+                result_code = BVLC_RESULT_DISTRIBUTE_BROADCAST_TO_NETWORK_NAK;
+                break;
+            default:
+                break;
+        }
+    }
+
+    if (result_code > 0) {
+        bvlc_send_result(addr, port, result_code);
+        fprintf(stderr, "BVLC: NAK code=%d\n", result_code);
+    }
+
+    return result_code;
+}
+
+/**
+ * @brief Get the last decoded BVLC function code
+ * @return BVLC function code
+ */
+BACNET_BVLC_FUNCTION pico_bvlc_get_function_code(void)
+{
+    return BVLC_Function_Code;
+}

ports/esp32/src/bvlc.h

@@ -0,0 +1,46 @@
+/**
+ * @file
+ * @brief BACnet Virtual Link Control interfaces for the PlatformIO ESP32 port
+ * @author Kato Gangstad
+ */
+
+#ifndef M5STAMPLC_BVLC_H
+#define M5STAMPLC_BVLC_H
+
+#include <stdint.h>
+
+#include "bacnet/datalink/bvlc.h"
+
+#define BACNET_BVLC_RESULT uint8_t
+#define BACNET_BVLC_FUNCTION uint8_t
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifndef BIP_MPDU_MAX
+#define BIP_MPDU_MAX 1506
+#endif
+
+/**
+ * @brief Handle non-BBMD BVLC functions for a received frame
+ * @param addr source IPv4 address
+ * @param port source UDP port
+ * @param npdu received frame buffer
+ * @param received_bytes frame length in bytes
+ * @return non-zero when the frame was consumed by BVLC handling
+ */
+uint16_t bvlc_for_non_bbmd(
+    uint8_t *addr, uint16_t *port, uint8_t *npdu, uint16_t received_bytes);
+
+/**
+ * @brief Get the most recently decoded BVLC function code
+ * @return BVLC function code
+ */
+BACNET_BVLC_FUNCTION pico_bvlc_get_function_code(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif

ports/esp32/src/device.h

@@ -1,461 +0,0 @@
-/**************************************************************************
-*
-* Copyright (C) 2005 Steve Karg <skarg@users.sourceforge.net>
-*
-* SPDX-License-Identifier: MIT
-*
-*********************************************************************/
-
-/** @file device.h Defines functions for handling all BACnet objects belonging
- *                 to a BACnet device, as well as Device-specific properties. */
-
-#ifndef DEVICE_H
-#define DEVICE_H
-
-#include <stdbool.h>
-#include <stdint.h>
-#include "bacnet/bacdef.h"
-#include "bacnet/bacenum.h"
-#include "bacnet/wp.h"
-#include "bacnet/rd.h"
-#include "bacnet/rp.h"
-#include "bacnet/rpm.h"
-#include "bacnet/readrange.h"
-
-/** Called so a BACnet object can perform any necessary initialization.
- * @ingroup ObjHelpers
- */
-typedef void (
-    *object_init_function) (
-    void);
-
-/** Counts the number of objects of this type.
- * @ingroup ObjHelpers
- * @return Count of implemented objects of this type.
- */
-typedef unsigned (
-    *object_count_function) (
-    void);
-
-/** Maps an object index position to its corresponding BACnet object instance number.
- * @ingroup ObjHelpers
- * @param index [in] The index of the object, in the array of objects of its type.
- * @return The BACnet object instance number to be used in a BACNET_OBJECT_ID.
- */
-typedef uint32_t(
-    *object_index_to_instance_function)
-        (
-    unsigned index);
-
-/** Provides the BACnet Object_Name for a given object instance of this type.
- * @ingroup ObjHelpers
- * @param object_instance [in] The object instance number to be looked up.
- * @param object_name [in,out] Pointer to a character_string structure that
- *         will hold a copy of the object name if this is a valid object_instance.
- * @return True if the object_instance is valid and object_name has been
- *         filled with a copy of the Object's name.
- */
-typedef bool(
-    *object_name_function)
-        (
-    uint32_t object_instance,
-    BACNET_CHARACTER_STRING * object_name);
-
-/** Look in the table of objects of this type, and see if this is a valid
- *  instance number.
- * @ingroup ObjHelpers
- * @param [in] The object instance number to be looked up.
- * @return True if the object instance refers to a valid object of this type.
- */
-typedef bool(
-    *object_valid_instance_function) (
-    uint32_t object_instance);
-
-/** Helper function to step through an array of objects and find either the
- * first one or the next one of a given type. Used to step through an array
- * of objects which is not necessarily contiguious for each type i.e. the
- * index for the 'n'th object of a given type is not necessarily 'n'.
- * @ingroup ObjHelpers
- * @param [in] The index of the current object or a value of ~0 to indicate
- * start at the beginning.
- * @return The index of the next object of the required type or ~0 (all bits
- * == 1) to indicate no more objects found.
- */
-typedef unsigned (
-    *object_iterate_function) (
-    unsigned current_index);
-
-/** Look in the table of objects of this type, and get the COV Value List.
- * @ingroup ObjHelpers
- * @param [in] The object instance number to be looked up.
- * @param [out] The value list
- * @return True if the object instance supports this feature, and has changed.
- */
-typedef bool(
-    *object_value_list_function) (
-    uint32_t object_instance,
-    BACNET_PROPERTY_VALUE * value_list);
-
-/** Look in the table of objects for this instance to see if value changed.
- * @ingroup ObjHelpers
- * @param [in] The object instance number to be looked up.
- * @return True if the object instance has changed.
- */
-typedef bool(
-    *object_cov_function) (
-    uint32_t object_instance);
-
-/** Look in the table of objects for this instance to clear the changed flag.
- * @ingroup ObjHelpers
- * @param [in] The object instance number to be looked up.
- */
-typedef void (
-    *object_cov_clear_function) (
-    uint32_t object_instance);
-
-/** Intrinsic Reporting funcionality.
- * @ingroup ObjHelpers
- * @param [in] Object instance.
- */
-typedef void (
-    *object_intrinsic_reporting_function) (
-    uint32_t object_instance);
-
-
-/** Defines the group of object helper functions for any supported Object.
- * @ingroup ObjHelpers
- * Each Object must provide some implementation of each of these helpers
- * in order to properly support the handlers.  Eg, the ReadProperty handler
- * handler_read_property() relies on the instance of Object_Read_Property
- * for each Object type, or configure the function as NULL.
- * In both appearance and operation, this group of functions acts like
- * they are member functions of a C++ Object base class.
- */
-typedef struct object_functions {
-    BACNET_OBJECT_TYPE Object_Type;
-    object_init_function Object_Init;
-    object_count_function Object_Count;
-    object_index_to_instance_function Object_Index_To_Instance;
-    object_valid_instance_function Object_Valid_Instance;
-    object_name_function Object_Name;
-    read_property_function Object_Read_Property;
-    write_property_function Object_Write_Property;
-    rpm_property_lists_function Object_RPM_List;
-    rr_info_function Object_RR_Info;
-    object_iterate_function Object_Iterator;
-    object_value_list_function Object_Value_List;
-    object_cov_function Object_COV;
-    object_cov_clear_function Object_COV_Clear;
-    object_intrinsic_reporting_function Object_Intrinsic_Reporting;
-} object_functions_t;
-
-/* String Lengths - excluding any nul terminator */
-#define MAX_DEV_NAME_LEN 32
-#define MAX_DEV_LOC_LEN  64
-#define MAX_DEV_MOD_LEN  32
-#define MAX_DEV_VER_LEN  16
-#define MAX_DEV_DESC_LEN 64
-
-/** Structure to define the Object Properties common to all Objects. */
-typedef struct commonBacObj_s {
-
-    /** The BACnet type of this object (ie, what class is this object from?).
-     * This property, of type BACnetObjectType, indicates membership in a
-     * particular object type class. Each inherited class will be of one type.
-     */
-    BACNET_OBJECT_TYPE mObject_Type;
-
-    /** The instance number for this class instance. */
-    uint32_t Object_Instance_Number;
-
-    /** Object Name; must be unique.
-     * This property, of type CharacterString, shall represent a name for
-     * the object that is unique within the BACnet Device that maintains it.
-     */
-    char Object_Name[MAX_DEV_NAME_LEN];
-
-} COMMON_BAC_OBJECT;
-
-
-/** Structure to define the Properties of Device Objects which distinguish
- *  one instance from another.
- *  This structure only defines fields for properties that are unique to
- *  a given Device object.  The rest may be fixed in device.c or hard-coded
- *  into the read-property encoding.
- *  This may be useful for implementations which manage multiple Devices,
- *  eg, a Gateway.
- */
-typedef struct devObj_s {
-    /** The BACnet Device Address for this device; ->len depends on DLL type. */
-    BACNET_ADDRESS bacDevAddr;
-
-    /** Structure for the Object Properties common to all Objects. */
-    COMMON_BAC_OBJECT bacObj;
-
-    /** Device Description. */
-    char Description[MAX_DEV_DESC_LEN];
-
-    /** The upcounter that shows if the Device ID or object structure has changed. */
-    uint32_t Database_Revision;
-} DEVICE_OBJECT_DATA;
-
-
-#ifdef __cplusplus
-extern "C" {
-#endif /* __cplusplus */
-
-    void Device_Init(
-        object_functions_t * object_table);
-
-    bool Device_Reinitialize(
-        BACNET_REINITIALIZE_DEVICE_DATA * rd_data);
-    bool Device_Reinitialize_State_Set(BACNET_REINITIALIZED_STATE state);
-    BACNET_REINITIALIZED_STATE Device_Reinitialized_State(
-        void);
-
-    rr_info_function Device_Objects_RR_Info(
-        BACNET_OBJECT_TYPE object_type);
-
-    void Device_getCurrentDateTime(
-        BACNET_DATE_TIME * DateTime);
-
-    int32_t Device_UTC_Offset(void);
-    void Device_UTC_Offset_Set(int16_t offset);
-
-    bool Device_Daylight_Savings_Status(void);
-    bool Device_Align_Intervals(void);
-    bool Device_Align_Intervals_Set(bool flag);
-    uint32_t Device_Time_Sync_Interval(void);
-    bool Device_Time_Sync_Interval_Set(uint32_t value);
-    uint32_t Device_Interval_Offset(void);
-    bool Device_Interval_Offset_Set(uint32_t value);
-
-    void Device_Property_Lists(
-        const int32_t **pRequired,
-        const int32_t **pOptional,
-        const int32_t **pProprietary);
-    void Device_Objects_Property_List(
-        BACNET_OBJECT_TYPE object_type,
-        uint32_t object_instance,
-        struct special_property_list_t *pPropertyList);
-    /* functions to support COV */
-    bool Device_Encode_Value_List(
-        BACNET_OBJECT_TYPE object_type,
-        uint32_t object_instance,
-        BACNET_PROPERTY_VALUE * value_list);
-    bool Device_Value_List_Supported(
-        BACNET_OBJECT_TYPE object_type);
-    bool Device_COV(
-        BACNET_OBJECT_TYPE object_type,
-        uint32_t object_instance);
-    void Device_COV_Clear(
-        BACNET_OBJECT_TYPE object_type,
-        uint32_t object_instance);
-
-    uint32_t Device_Object_Instance_Number(
-        void);
-    bool Device_Set_Object_Instance_Number(
-        uint32_t object_id);
-    bool Device_Valid_Object_Instance_Number(
-        uint32_t object_id);
-    unsigned Device_Object_List_Count(
-        void);
-    bool Device_Object_List_Identifier(
-        uint32_t array_index,
-        BACNET_OBJECT_TYPE *object_type,
-        uint32_t * instance);
-
-    unsigned Device_Count(
-        void);
-    uint32_t Device_Index_To_Instance(
-        unsigned index);
-
-    bool Device_Object_Name(
-        uint32_t object_instance,
-        BACNET_CHARACTER_STRING * object_name);
-    bool Device_Set_Object_Name(
-        const BACNET_CHARACTER_STRING * object_name);
-    /* Copy a child object name, given its ID. */
-    bool Device_Object_Name_Copy(
-        BACNET_OBJECT_TYPE object_type,
-        uint32_t object_instance,
-        BACNET_CHARACTER_STRING * object_name);
-    bool Device_Object_Name_ANSI_Init(const char * object_name);
-    char * Device_Object_Name_ANSI(void);
-
-    BACNET_DEVICE_STATUS Device_System_Status(
-        void);
-    int Device_Set_System_Status(
-        BACNET_DEVICE_STATUS status,
-        bool local);
-
-    const char *Device_Vendor_Name(
-        void);
-
-    uint16_t Device_Vendor_Identifier(
-        void);
-    void Device_Set_Vendor_Identifier(
-        uint16_t vendor_id);
-
-    const char *Device_Model_Name(
-        void);
-    bool Device_Set_Model_Name(
-        const char *name,
-        size_t length);
-
-    const char *Device_Firmware_Revision(
-        void);
-
-    const char *Device_Application_Software_Version(
-        void);
-    bool Device_Set_Application_Software_Version(
-        const char *name,
-        size_t length);
-
-    const char *Device_Description(
-        void);
-    bool Device_Set_Description(
-        const char *name,
-        size_t length);
-
-    const char *Device_Location(
-        void);
-    bool Device_Set_Location(
-        const char *name,
-        size_t length);
-
-    /* some stack-centric constant values - no set methods */
-    uint8_t Device_Protocol_Version(
-        void);
-    uint8_t Device_Protocol_Revision(
-        void);
-    BACNET_SEGMENTATION Device_Segmentation_Supported(
-        void);
-
-    uint32_t Device_Database_Revision(
-        void);
-    void Device_Set_Database_Revision(
-        uint32_t revision);
-    void Device_Inc_Database_Revision(
-        void);
-
-    bool Device_Valid_Object_Name(
-        const BACNET_CHARACTER_STRING * object_name,
-        BACNET_OBJECT_TYPE *object_type,
-        uint32_t * object_instance);
-    bool Device_Valid_Object_Id(
-        BACNET_OBJECT_TYPE object_type,
-        uint32_t object_instance);
-
-    int Device_Read_Property(
-        BACNET_READ_PROPERTY_DATA * rpdata);
-    bool Device_Write_Property(
-        BACNET_WRITE_PROPERTY_DATA * wp_data);
-
-    bool DeviceGetRRInfo(
-        BACNET_READ_RANGE_DATA * pRequest,      /* Info on the request */
-        RR_PROP_INFO * pInfo);  /* Where to put the information */
-
-    int Device_Read_Property_Local(
-        BACNET_READ_PROPERTY_DATA * rpdata);
-    bool Device_Write_Property_Local(
-        BACNET_WRITE_PROPERTY_DATA * wp_data);
-
-#if defined(INTRINSIC_REPORTING)
-    void Device_local_reporting(
-        void);
-#endif
-
-/* Prototypes for Routing functionality in the Device Object.
- * Enable by defining BAC_ROUTING in config.h and including gw_device.c
- * in the build (lib/Makefile).
- */
-    void Routing_Device_Init(
-        uint32_t first_object_instance);
-
-    uint16_t Add_Routed_Device(
-        uint32_t Object_Instance,
-        const BACNET_CHARACTER_STRING * Object_Name,
-        const char *Description);
-    DEVICE_OBJECT_DATA *Get_Routed_Device_Object(
-        int idx);
-    BACNET_ADDRESS *Get_Routed_Device_Address(
-        int idx);
-
-    void routed_get_my_address(
-        BACNET_ADDRESS * my_address);
-
-    bool Routed_Device_Address_Lookup(
-        int idx,
-        uint8_t address_len,
-        const uint8_t * mac_adress);
-    bool Routed_Device_GetNext(
-        const BACNET_ADDRESS * dest,
-        const int32_t *DNET_list,
-        int *cursor);
-    bool Routed_Device_Is_Valid_Network(
-        uint16_t dest_net,
-        const int32_t *DNET_list);
-
-    uint32_t Routed_Device_Index_To_Instance(
-        unsigned index);
-    bool Routed_Device_Valid_Object_Instance_Number(
-        uint32_t object_id);
-    bool Routed_Device_Name(
-        uint32_t object_instance,
-        BACNET_CHARACTER_STRING * object_name);
-    uint32_t Routed_Device_Object_Instance_Number(
-        void);
-    bool Routed_Device_Set_Object_Instance_Number(
-        uint32_t object_id);
-    bool Routed_Device_Set_Object_Name(
-        uint8_t encoding,
-        const char *value,
-        size_t length);
-    bool Routed_Device_Set_Description(
-        const char *name,
-        size_t length);
-    void Routed_Device_Inc_Database_Revision(
-        void);
-    int Routed_Device_Service_Approval(
-        BACNET_CONFIRMED_SERVICE service,
-        int service_argument,
-        uint8_t * apdu_buff,
-        uint8_t invoke_id);
-
-
-
-#ifdef __cplusplus
-}
-#endif /* __cplusplus */
-/** @defgroup ObjFrmwk Object Framework
- * The modules in this section describe the BACnet-stack's framework for
- * BACnet-defined Objects (Device, Analog Input, etc). There are two submodules
- * to describe this arrangement:
- *  - The "object helper functions" which provide C++-like common functionality
- *    to all supported object types.
- *  - The interface between the implemented Objects and the BAC-stack services,
- *    specifically the handlers, which are mediated through function calls to
- *    the Device object.
- */
-/** @defgroup ObjHelpers Object Helper Functions
- * @ingroup ObjFrmwk
- * This section describes the function templates for the helper functions that
- * provide common object support.
- */
-/** @defgroup ObjIntf Handler-to-Object Interface Functions
- * @ingroup ObjFrmwk
- * This section describes the fairly limited set of functions that link the
- * BAC-stack handlers to the BACnet Object instances.  All of these calls are
- * situated in the Device Object, which "knows" how to reach its child Objects.
- *
- * Most of these calls have a common operation:
- *  -# Call Device_Objects_Find_Functions( for the desired Object_Type )
- *   - Gets a pointer to the object_functions for this Type of Object.
- *  -# Call the Object's Object_Valid_Instance( for the desired object_instance )
- *     to make sure there is such an instance.
- *  -# Call the Object helper function needed by the handler,
- *     eg Object_Read_Property() for the RP handler.
- *
- */
-#endif

ports/esp32/src/dlenv.c

@@ -0,0 +1,81 @@
+/**
+ * @file
+ * @brief BACnet MS/TP datalink environment setup for the PlatformIO ESP32 port
+ * @author Kato Gangstad
+ */
+
+#include "dlenv.h"
+
+#include "bacnet/datalink/dlmstp.h"
+#include "rs485.h"
+
+volatile struct mstp_port_struct_t MSTP_Port;
+
+static struct dlmstp_user_data_t MSTP_User_Data;
+static uint8_t Input_Buffer[DLMSTP_MPDU_MAX];
+static uint8_t Output_Buffer[DLMSTP_MPDU_MAX];
+
+static struct dlmstp_rs485_driver RS485_Driver = {
+    .init = rs485_init,
+    .send = rs485_bytes_send,
+    .read = rs485_byte_available,
+    .transmitting = rs485_rts_enabled,
+    .baud_rate = rs485_baud_rate,
+    .baud_rate_set = rs485_baud_rate_set,
+    .silence_milliseconds = rs485_silence_milliseconds,
+    .silence_reset = rs485_silence_reset
+};
+
+/**
+ * @brief Initialize the BACnet MS/TP datalink environment
+ * @param mac_address local MS/TP MAC address
+ * @return true if the datalink initialized successfully
+ */
+bool m5_dlenv_init(uint8_t mac_address)
+{
+    RS485_Driver.init();
+
+    MSTP_Port.Nmax_info_frames = BACNET_MSTP_MAX_INFO_FRAMES;
+    MSTP_Port.Nmax_master = BACNET_MSTP_MAX_MASTER;
+
+    MSTP_Port.InputBuffer = Input_Buffer;
+    MSTP_Port.InputBufferSize = sizeof(Input_Buffer);
+    MSTP_Port.OutputBuffer = Output_Buffer;
+    MSTP_Port.OutputBufferSize = sizeof(Output_Buffer);
+
+    MSTP_Port.ZeroConfigEnabled = false;
+    MSTP_Port.SlaveNodeEnabled = false;
+    MSTP_Port.CheckAutoBaud = false;
+
+    MSTP_Zero_Config_UUID_Init((struct mstp_port_struct_t *)&MSTP_Port);
+
+    MSTP_User_Data.RS485_Driver = &RS485_Driver;
+    MSTP_Port.UserData = &MSTP_User_Data;
+
+    if (!dlmstp_init((char *)&MSTP_Port)) {
+        return false;
+    }
+
+    dlmstp_set_mac_address(mac_address);
+    dlmstp_set_baud_rate(RS485_BAUD_RATE);
+    dlmstp_set_max_master(BACNET_MSTP_MAX_MASTER);
+    dlmstp_set_max_info_frames(BACNET_MSTP_MAX_INFO_FRAMES);
+
+    return true;
+}
+
+/**
+ * @brief Run any periodic MS/TP maintenance hooks
+ * @param seconds elapsed seconds since the last call
+ */
+void dlenv_maintenance_timer(uint16_t seconds)
+{
+    (void)seconds;
+}
+
+/**
+ * @brief Shut down the MS/TP datalink environment
+ */
+void dlenv_cleanup(void)
+{
+}

ports/esp32/src/dlenv.h

@@ -0,0 +1,48 @@
+/**
+ * @file
+ * @brief BACnet MS/TP datalink environment declarations for the PlatformIO
+ * ESP32 port
+ * @author Kato Gangstad
+ */
+
+#ifndef M5STAMPLC_DLENV_H
+#define M5STAMPLC_DLENV_H
+
+#include <stdbool.h>
+#include <stdint.h>
+
+#include "bacnet/bacdef.h"
+#include "bacnet/datalink/dlenv.h"
+#include "bacnet/datalink/dlmstp.h"
+#include "bacnet/datalink/mstp.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define BACNET_MSTP_MAX_MASTER 127
+#define BACNET_MSTP_MAX_INFO_FRAMES 1
+
+/**
+ * @brief Initialize the BACnet MS/TP datalink environment
+ * @param mac_address local MS/TP MAC address
+ * @return true if initialization succeeded
+ */
+bool m5_dlenv_init(uint8_t mac_address);
+
+/**
+ * @brief Run periodic MS/TP maintenance work
+ * @param seconds elapsed seconds since the last call
+ */
+void dlenv_maintenance_timer(uint16_t seconds);
+
+/**
+ * @brief Shut down the MS/TP datalink environment
+ */
+void dlenv_cleanup(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif

ports/esp32/src/main.c

@@ -1,218 +0,0 @@
-//
-// Copyleft  F.Chaxel 2017
-//
-
-#include "bacnet/config.h"
-#include "bacnet/basic/tsm/tsm.h"
-#include "bacnet/basic/services.h"
-
-#include "bacnet/basic/services.h"
-#include "bacnet/datalink/datalink.h"
-#include "bacnet/dcc.h"
-#include "bacnet/basic/tsm/tsm.h"
-// conflict filename address.h with another file in default include paths
-#include "../lib/stack/address.h"
-#include "bacnet/datalink/bip.h"
-
-#include "bacnet/basic/object/device.h"
-#include "bacnet/basic/object/ai.h"
-#include "bacnet/basic/object/bo.h"
-
-#include "esp_log.h"
-#include "esp_wifi.h"
-#include "esp_event_loop.h"
-#include "nvs_flash.h"
-
-#include "driver/gpio.h"
-
-#include "lwip/sockets.h"
-#include "lwip/netdb.h"
-
-#include "freertos/FreeRTOS.h"
-#include "freertos/task.h"
-#include "freertos/event_groups.h"
-
-// hidden function not in any .h files
-extern uint8_t temprature_sens_read();
-extern uint32_t hall_sens_read();
-
-// Wifi params
-wifi_config_t wifi_config = {
-    .sta = {
-        .ssid = "myWifi",
-        .password = "myPass",
-    },
-};
-
-// GPIO 5 has a Led on Sparkfun ESP32 board
-#define BACNET_LED 5
-
-uint8_t Handler_Transmit_Buffer[MAX_PDU] = { 0 };
-
-/** Static receive buffer, initialized with zeros by the C Library Startup Code. */
-
-uint8_t Rx_Buf[MAX_MPDU + 16 /* Add a little safety margin to the buffer,
-                              * so that in the rare case, the message
-                              * would be filled up to MAX_MPDU and some
-                              * decoding functions would overrun, these
-                              * decoding functions will just end up in
-                              * a safe field of static zeros. */] = { 0 };
-
-EventGroupHandle_t wifi_event_group;
-const static int CONNECTED_BIT = BIT0;
-
-/* BACnet handler, stack init, IAm */
-void StartBACnet()
-{
-    /* we need to handle who-is to support dynamic device binding */
-    apdu_set_unconfirmed_handler(SERVICE_UNCONFIRMED_WHO_IS, handler_who_is);
-
-    /* set the handler for all the services we don't implement */
-    /* It is required to send the proper reject message... */
-    apdu_set_unrecognized_service_handler_handler(handler_unrecognized_service);
-    /* Set the handlers for any confirmed services that we support. */
-    /* We must implement read property - it's required! */
-    apdu_set_confirmed_handler(
-        SERVICE_CONFIRMED_READ_PROPERTY, handler_read_property);
-    apdu_set_confirmed_handler(
-        SERVICE_CONFIRMED_READ_PROP_MULTIPLE, handler_read_property_multiple);
-
-    apdu_set_confirmed_handler(
-        SERVICE_CONFIRMED_WRITE_PROPERTY, handler_write_property);
-    apdu_set_confirmed_handler(
-        SERVICE_CONFIRMED_SUBSCRIBE_COV, handler_cov_subscribe);
-
-    address_init();
-    bip_init(NULL);
-    Send_I_Am(&Handler_Transmit_Buffer[0]);
-}
-
-/* wifi events handler : start & stop bacnet with an event  */
-esp_err_t wifi_event_handler(void *ctx, system_event_t *event)
-{
-    switch (event->event_id) {
-        case SYSTEM_EVENT_STA_START:
-            esp_wifi_connect();
-            break;
-        case SYSTEM_EVENT_STA_CONNECTED:
-            break;
-        case SYSTEM_EVENT_STA_GOT_IP:
-            if (xEventGroupGetBits(wifi_event_group) != CONNECTED_BIT) {
-                xEventGroupSetBits(wifi_event_group, CONNECTED_BIT);
-                StartBACnet();
-            }
-            break;
-        case SYSTEM_EVENT_STA_DISCONNECTED:
-            /* This is a workaround as ESP32 WiFi libs don't currently
-               auto-reassociate. */
-            esp_wifi_connect();
-            xEventGroupClearBits(wifi_event_group, CONNECTED_BIT);
-            bip_cleanup();
-            break;
-        default:
-            break;
-    }
-    return ESP_OK;
-}
-
-/* tcpip & wifi station start */
-
-void wifi_init_station(void)
-{
-    tcpip_adapter_init();
-    wifi_event_group = xEventGroupCreate();
-    esp_event_loop_init(wifi_event_handler, NULL);
-
-    wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
-    esp_wifi_init(&cfg);
-
-    esp_wifi_set_storage(WIFI_STORAGE_RAM);
-    esp_wifi_set_mode(WIFI_MODE_STA);
-
-    esp_wifi_set_config(ESP_IF_WIFI_STA, &wifi_config);
-
-    esp_wifi_start();
-}
-
-/* setup gpio & nv flash, call wifi init code */
-void setup()
-{
-    gpio_pad_select_gpio(BACNET_LED);
-    gpio_set_direction(BACNET_LED, GPIO_MODE_OUTPUT);
-
-    gpio_set_level(BACNET_LED, 0);
-
-    esp_err_t ret = nvs_flash_init();
-    if (ret == ESP_ERR_NVS_NO_FREE_PAGES) {
-        nvs_flash_erase();
-        ret = nvs_flash_init();
-    }
-    wifi_init_station();
-}
-
-/* Bacnet Task */
-void BACnetTask(void *pvParameters)
-{
-    uint16_t pdu_len = 0;
-    BACNET_ADDRESS src = { 0 };
-    unsigned timeout = 1;
-
-    // Init Bacnet objets dictionnary
-    Device_Init(NULL);
-    Device_Set_Object_Instance_Number(12);
-
-    setup();
-
-    uint32_t tickcount = xTaskGetTickCount();
-
-    for (;;) {
-        vTaskDelay(
-            10 / portTICK_PERIOD_MS); // could be remove to speed the code
-
-        // do nothing if not connected to wifi
-        xEventGroupWaitBits(
-            wifi_event_group, CONNECTED_BIT, false, true, portMAX_DELAY);
-        {
-            uint32_t newtick = xTaskGetTickCount();
-
-            // one second elapse at least (maybe much more if Wifi was
-            // deconnected for a long)
-            if ((newtick < tickcount) ||
-                ((newtick - tickcount) >= configTICK_RATE_HZ)) {
-                tickcount = newtick;
-                dcc_timer_seconds(1);
-                bvlc_maintenance_timer(1);
-                handler_cov_timer_seconds(1);
-                tsm_timer_milliseconds(1000);
-
-                // Read analog values from internal sensors
-                Analog_Input_Present_Value_Set(0, temprature_sens_read());
-                Analog_Input_Present_Value_Set(1, hall_sens_read());
-            }
-
-            pdu_len = datalink_receive(&src, &Rx_Buf[0], MAX_MPDU, timeout);
-            if (pdu_len) {
-                npdu_handler(&src, &Rx_Buf[0], pdu_len);
-
-                if (Binary_Output_Present_Value(0) == BINARY_ACTIVE)
-                    gpio_set_level(BACNET_LED, 1);
-                else
-                    gpio_set_level(BACNET_LED, 0);
-            }
-
-            handler_cov_task();
-        }
-    }
-}
-/* Entry point */
-void app_main()
-{
-    // Cannot run BACnet code here, the default stack size is to small : 4096
-    // byte
-    xTaskCreate(BACnetTask, /* Function to implement the task */
-        "BACnetTask", /* Name of the task */
-        10000, /* Stack size in words */
-        NULL, /* Task input parameter */
-        20, /* Priority of the task */
-        NULL); /* Task handle. */
-}

ports/esp32/src/main.cpp

@@ -0,0 +1,57 @@
+/**
+ * @file
+ * @brief BACnet MS/TP application entry point for M5StamPLC
+ * @author Kato Gangstad
+ */
+
+#include <Arduino.h>
+#include <M5StamPLC.h>
+
+#ifndef PLC_INPUT_ACTIVE_LOW
+#define PLC_INPUT_ACTIVE_LOW 0
+#endif
+
+extern "C" {
+#include "bacnet_app.h"
+}
+
+/**
+ * @brief Initialize the MS/TP application and PLC hardware
+ */
+void setup(void)
+{
+    Serial.begin(115200);
+    delay(100);
+    Serial.println("[BOOT] Mode: BACnet MS/TP");
+    Serial.println("[BOOT] Init M5StamPLC...");
+    M5StamPLC.begin();
+    Serial.println("[BOOT] Init BACnet app...");
+    bacnet_app_init();
+    Serial.println("[BOOT] BACnet MS/TP ready");
+}
+
+/**
+ * @brief Run the main MS/TP application loop
+ */
+void loop(void)
+{
+    M5StamPLC.update();
+
+    for (uint8_t i = 0; i < bacnet_app_input_count(); i++) {
+        bool state = M5StamPLC.readPlcInput(i);
+#if PLC_INPUT_ACTIVE_LOW
+        state = !state;
+#endif
+        bacnet_app_input_set(i, state);
+    }
+
+    for (uint8_t i = 0; i < bacnet_app_relay_count(); i++) {
+        M5StamPLC.writePlcRelay(i, bacnet_app_relay_get(i));
+    }
+
+    bacnet_app_temperature_set(M5StamPLC.getTemp());
+    bacnet_app_free_heap_kb_set((float)ESP.getFreeHeap() / 1024.0f);
+
+    bacnet_app_tick();
+    delay(1);
+}

ports/esp32/src/main_bip.cpp

@@ -0,0 +1,152 @@
+/**
+ * @file
+ * @brief BACnet/IP application entry point for ESP32 PlatformIO environments
+ * @author Kato Gangstad
+ */
+
+#include <Arduino.h>
+#include <cstring>
+#if !defined(USE_M5STAMPLC_IO) || (USE_M5STAMPLC_IO)
+#include <M5StamPLC.h>
+#endif
+#include <WiFi.h>
+#if defined(USE_ETH_INTERFACE) && (USE_ETH_INTERFACE)
+#include <ETH.h>
+#endif
+
+#ifndef PLC_INPUT_ACTIVE_LOW
+#define PLC_INPUT_ACTIVE_LOW 0
+#endif
+
+#ifndef USE_M5STAMPLC_IO
+#define USE_M5STAMPLC_IO 1
+#endif
+
+#ifndef USE_ETH_INTERFACE
+#define USE_ETH_INTERFACE 0
+#endif
+
+#ifndef WIFI_SSID
+#define WIFI_SSID ""
+#endif
+
+#ifndef WIFI_PASS
+#define WIFI_PASS ""
+#endif
+
+#ifndef BACNET_IP_PORT
+#define BACNET_IP_PORT 47808
+#endif
+
+extern "C" {
+#include "bacnet_app.h"
+}
+
+/**
+ * @brief Bring up the selected WiFi or Ethernet interface
+ */
+static void wifi_connect(void)
+{
+#if USE_ETH_INTERFACE
+    Serial.println("[ETH] Starting Ethernet...");
+    if (!ETH.begin()) {
+        Serial.println("[ETH] ETH.begin() failed");
+        return;
+    }
+
+    unsigned long start = millis();
+    while (!ETH.linkUp() && ((millis() - start) < 15000UL)) {
+        delay(200);
+        Serial.print('.');
+    }
+    Serial.println();
+
+    if (ETH.linkUp()) {
+        Serial.printf(
+            "[ETH] Link up. IP: %s\n", ETH.localIP().toString().c_str());
+    } else {
+        Serial.println("[ETH] Link timeout");
+    }
+#else
+    if (strlen(WIFI_SSID) == 0) {
+        Serial.println("[WIFI] SSID not configured; skipping WiFi connect");
+        return;
+    }
+
+    Serial.printf("[WIFI] Connecting to SSID: %s\n", WIFI_SSID);
+    WiFi.mode(WIFI_STA);
+    WiFi.begin(WIFI_SSID, WIFI_PASS);
+
+    unsigned long start = millis();
+    while ((WiFi.status() != WL_CONNECTED) && ((millis() - start) < 15000UL)) {
+        delay(200);
+        Serial.print('.');
+    }
+
+    Serial.println();
+    if (WiFi.status() == WL_CONNECTED) {
+        Serial.printf(
+            "[WIFI] Connected. IP: %s\n", WiFi.localIP().toString().c_str());
+    } else {
+        Serial.printf(
+            "[WIFI] Connect timeout. status=%d\n", (int)WiFi.status());
+    }
+#endif
+}
+
+/**
+ * @brief Initialize the BACnet/IP application and selected board profile
+ */
+void setup(void)
+{
+    Serial.begin(115200);
+    delay(100);
+    Serial.println("[BOOT] Mode: BACnet/IP");
+    Serial.printf("[BOOT] BACnet UDP Port: %u\n", (unsigned)BACNET_IP_PORT);
+#if USE_ETH_INTERFACE
+    Serial.println("[BOOT] Network: Ethernet");
+#else
+    Serial.println("[BOOT] Network: WiFi");
+#endif
+#if USE_M5STAMPLC_IO
+    Serial.println("[BOOT] Board profile: M5StamPLC I/O enabled");
+    M5StamPLC.begin();
+#else
+    Serial.println("[BOOT] Board profile: Generic/ESP32-PoE (M5 I/O disabled)");
+#endif
+    wifi_connect();
+    Serial.println("[BOOT] Init BACnet app...");
+    bacnet_app_init();
+    Serial.println("[BOOT] BACnet/IP ready");
+}
+
+/**
+ * @brief Run the main BACnet/IP application loop
+ */
+void loop(void)
+{
+#if USE_M5STAMPLC_IO
+    M5StamPLC.update();
+
+    for (uint8_t i = 0; i < bacnet_app_input_count(); i++) {
+        bool state = M5StamPLC.readPlcInput(i);
+#if PLC_INPUT_ACTIVE_LOW
+        state = !state;
+#endif
+        bacnet_app_input_set(i, state);
+    }
+
+    for (uint8_t i = 0; i < bacnet_app_relay_count(); i++) {
+        M5StamPLC.writePlcRelay(i, bacnet_app_relay_get(i));
+    }
+
+    bacnet_app_temperature_set(M5StamPLC.getTemp());
+    bacnet_app_free_heap_kb_set((float)ESP.getFreeHeap() / 1024.0f);
+#else
+    bacnet_app_temperature_set(0.0f);
+    bacnet_app_free_heap_kb_set((float)ESP.getFreeHeap() / 1024.0f);
+#endif
+
+    bacnet_app_tick();
+    delay(1);
+}

ports/esp32/src/main_gateway_router.cpp

@@ -0,0 +1,332 @@
+/**
+ * @file
+ * @brief BACnet router entry point bridging BACnet/IP and BACnet MS/TP
+ * @author Kato Gangstad
+ */
+
+#include <Arduino.h>
+#include <cstring>
+#include <M5StamPLC.h>
+#include <WiFi.h>
+
+extern "C" {
+#include "bacnet_app.h"
+#include "bip.h"
+#include "dlenv.h"
+#include "bacnet/bacdcode.h"
+#include "bacnet/npdu.h"
+#include "bacnet/apdu.h"
+#include "bacnet/datalink/dlmstp.h"
+#include "bacnet/basic/npdu/h_npdu.h"
+#include "bacnet/basic/tsm/tsm.h"
+}
+
+#ifndef WIFI_SSID
+#define WIFI_SSID ""
+#endif
+
+#ifndef WIFI_PASS
+#define WIFI_PASS ""
+#endif
+
+#ifndef BACNET_IP_PORT
+#define BACNET_IP_PORT 47808
+#endif
+
+#ifndef ROUTER_BIP_NET
+#define ROUTER_BIP_NET 1
+#endif
+
+#ifndef ROUTER_MSTP_NET
+#define ROUTER_MSTP_NET 200
+#endif
+
+#ifndef ROUTER_MSTP_MAC
+#define ROUTER_MSTP_MAC 2
+#endif
+
+#ifndef PLC_INPUT_ACTIVE_LOW
+#define PLC_INPUT_ACTIVE_LOW 0
+#endif
+
+#ifndef GATEWAY_MAX
+#define GATEWAY_MAX(a, b) (((a) > (b)) ? (a) : (b))
+#endif
+
+static uint8_t BipRxBuffer[BIP_MPDU_MAX];
+static uint8_t MstpRxBuffer[DLMSTP_MPDU_MAX];
+static uint8_t TxBuffer[GATEWAY_MAX(BIP_MPDU_MAX, DLMSTP_MPDU_MAX)];
+
+/**
+ * @brief Connect the BACnet/IP side of the router to WiFi
+ */
+static void wifi_connect(void)
+{
+    if (strlen(WIFI_SSID) == 0) {
+        Serial.println("[WIFI] SSID not configured; skipping WiFi connect");
+        return;
+    }
+
+    Serial.printf("[WIFI] Connecting to SSID: %s\n", WIFI_SSID);
+    WiFi.mode(WIFI_STA);
+    WiFi.begin(WIFI_SSID, WIFI_PASS);
+
+    unsigned long start = millis();
+    while ((WiFi.status() != WL_CONNECTED) && ((millis() - start) < 15000UL)) {
+        delay(200);
+        Serial.print('.');
+    }
+    Serial.println();
+
+    if (WiFi.status() == WL_CONNECTED) {
+        Serial.printf(
+            "[WIFI] Connected. IP: %s\n", WiFi.localIP().toString().c_str());
+    } else {
+        Serial.printf(
+            "[WIFI] Connect timeout. status=%d\n", (int)WiFi.status());
+    }
+}
+
+/**
+ * @brief Send a BACnet router network message on the MS/TP segment
+ * @param type network layer message type
+ * @param dnet destination network number, or negative when omitted
+ * @return number of bytes sent, or a negative value on error
+ */
+static int
+send_router_message_on_mstp(BACNET_NETWORK_MESSAGE_TYPE type, int dnet)
+{
+    BACNET_NPDU_DATA npdu_data = { 0 };
+    BACNET_ADDRESS dest = { 0 };
+    int pdu_len = 0;
+
+    dest.mac_len = 0;
+    dest.net = BACNET_BROADCAST_NETWORK;
+    dest.len = 0;
+
+    npdu_encode_npdu_network(&npdu_data, type, false, MESSAGE_PRIORITY_NORMAL);
+    pdu_len = npdu_encode_pdu(TxBuffer, &dest, NULL, &npdu_data);
+    if (dnet >= 0) {
+        pdu_len += encode_unsigned16(&TxBuffer[pdu_len], (uint16_t)dnet);
+    }
+
+    return dlmstp_send_pdu(&dest, &npdu_data, TxBuffer, (unsigned)pdu_len);
+}
+
+/**
+ * @brief Send a BACnet router network message on the BACnet/IP segment
+ * @param type network layer message type
+ * @param dnet destination network number, or negative when omitted
+ * @return number of bytes sent, or a negative value on error
+ */
+static int
+send_router_message_on_bip(BACNET_NETWORK_MESSAGE_TYPE type, int dnet)
+{
+    BACNET_NPDU_DATA npdu_data = { 0 };
+    BACNET_ADDRESS dest = { 0 };
+    int pdu_len = 0;
+
+    bip_get_broadcast_address(&dest);
+
+    npdu_encode_npdu_network(&npdu_data, type, false, MESSAGE_PRIORITY_NORMAL);
+    pdu_len = npdu_encode_pdu(TxBuffer, &dest, NULL, &npdu_data);
+    if (dnet >= 0) {
+        pdu_len += encode_unsigned16(&TxBuffer[pdu_len], (uint16_t)dnet);
+    }
+
+    return bip_send_pdu(&dest, &npdu_data, TxBuffer, (unsigned)pdu_len);
+}
+
+/**
+ * @brief Check whether a received NPDU should be processed by the local device
+ * @param dest decoded destination address
+ * @return true if the packet targets the local device or broadcast
+ */
+static bool should_process_locally(const BACNET_ADDRESS *dest)
+{
+    return (dest->net == 0U) || (dest->net == BACNET_BROADCAST_NETWORK);
+}
+
+/**
+ * @brief Route an NPDU between BACnet/IP and MS/TP segments
+ * @param from_bip true when the frame arrived from BACnet/IP
+ * @param src decoded source address
+ * @param pdu NPDU buffer to route
+ * @param pdu_len NPDU length in bytes
+ */
+static void
+forward_pdu(bool from_bip, BACNET_ADDRESS *src, uint8_t *pdu, uint16_t pdu_len)
+{
+    BACNET_ADDRESS dest = { 0 };
+    BACNET_ADDRESS routed_src = { 0 };
+    BACNET_NPDU_DATA npdu_data = { 0 };
+    int apdu_offset = bacnet_npdu_decode(pdu, pdu_len, &dest, src, &npdu_data);
+    if (apdu_offset <= 0) {
+        return;
+    }
+
+    const uint16_t src_net = from_bip ? ROUTER_BIP_NET : ROUTER_MSTP_NET;
+    const uint16_t dst_net = from_bip ? ROUTER_MSTP_NET : ROUTER_BIP_NET;
+
+    if (npdu_data.network_layer_message) {
+        if (npdu_data.network_message_type ==
+            NETWORK_MESSAGE_WHO_IS_ROUTER_TO_NETWORK) {
+            uint16_t requested = 0;
+            bool has_dnet = (pdu_len - apdu_offset) >= 2;
+            if (has_dnet) {
+                (void)decode_unsigned16(&pdu[apdu_offset], &requested);
+            }
+            if (!has_dnet || (requested == dst_net)) {
+                if (from_bip) {
+                    send_router_message_on_bip(
+                        NETWORK_MESSAGE_I_AM_ROUTER_TO_NETWORK, dst_net);
+                } else {
+                    send_router_message_on_mstp(
+                        NETWORK_MESSAGE_I_AM_ROUTER_TO_NETWORK, dst_net);
+                }
+            }
+        }
+        return;
+    }
+
+    if ((dest.net != 0U) && (dest.net != BACNET_BROADCAST_NETWORK) &&
+        (dest.net != dst_net)) {
+        return;
+    }
+
+    if (npdu_data.hop_count > 0) {
+        npdu_data.hop_count--;
+        if (npdu_data.hop_count == 0) {
+            return;
+        }
+    }
+
+    if (src->net != 0U) {
+        routed_src = *src;
+    } else {
+        memset(&routed_src, 0, sizeof(routed_src));
+        routed_src.net = src_net;
+        routed_src.len = src->mac_len;
+        for (uint8_t i = 0; i < src->mac_len && i < MAX_MAC_LEN; i++) {
+            routed_src.adr[i] = src->mac[i];
+        }
+    }
+
+    BACNET_ADDRESS out_dest = { 0 };
+    if (dest.net == BACNET_BROADCAST_NETWORK ||
+        ((dest.net == dst_net) && (dest.len == 0))) {
+        out_dest.mac_len = 0;
+        out_dest.net = BACNET_BROADCAST_NETWORK;
+        out_dest.len = 0;
+    } else if ((dest.net == dst_net) && (dest.len > 0)) {
+        out_dest.mac_len = dest.len;
+        for (uint8_t i = 0; i < dest.len && i < MAX_MAC_LEN; i++) {
+            out_dest.mac[i] = dest.adr[i];
+        }
+        out_dest.net = 0;
+        out_dest.len = 0;
+    } else {
+        out_dest = dest;
+    }
+
+    int out_len = npdu_encode_pdu(TxBuffer, &out_dest, &routed_src, &npdu_data);
+    if (out_len <= 0) {
+        return;
+    }
+
+    const uint16_t apdu_len = (uint16_t)(pdu_len - apdu_offset);
+    if ((out_len + (int)apdu_len) > (int)sizeof(TxBuffer)) {
+        return;
+    }
+    memcpy(&TxBuffer[out_len], &pdu[apdu_offset], apdu_len);
+    out_len += apdu_len;
+
+    if (from_bip) {
+        (void)dlmstp_send_pdu(
+            &out_dest, &npdu_data, TxBuffer, (unsigned)out_len);
+    } else {
+        (void)bip_send_pdu(&out_dest, &npdu_data, TxBuffer, (unsigned)out_len);
+    }
+}
+
+/**
+ * @brief Initialize the BACnet router and local device services
+ */
+void setup(void)
+{
+    Serial.begin(115200);
+    delay(100);
+    Serial.println("[BOOT] Mode: BACnet Gateway (Router + Local Device)");
+    Serial.printf(
+        "[GATEWAY] BIP NET=%u MSTP NET=%u MSTP MAC=%u\n",
+        (unsigned)ROUTER_BIP_NET, (unsigned)ROUTER_MSTP_NET,
+        (unsigned)ROUTER_MSTP_MAC);
+
+    M5StamPLC.begin();
+    wifi_connect();
+
+    /* Local device + objects run on B/IP side (same logic as existing M5 app).
+     */
+    bacnet_app_init();
+
+    if (!m5_dlenv_init((uint8_t)ROUTER_MSTP_MAC)) {
+        Serial.println("[GATEWAY] ERROR: MSTP init failed");
+        for (;;) {
+            delay(1000);
+        }
+    }
+
+    (void)send_router_message_on_bip(
+        NETWORK_MESSAGE_I_AM_ROUTER_TO_NETWORK, ROUTER_MSTP_NET);
+    (void)send_router_message_on_mstp(
+        NETWORK_MESSAGE_I_AM_ROUTER_TO_NETWORK, ROUTER_BIP_NET);
+
+    Serial.println("[GATEWAY] Ready");
+}
+
+/**
+ * @brief Run the BACnet router main loop
+ */
+void loop(void)
+{
+    BACNET_ADDRESS src = { 0 };
+    BACNET_ADDRESS dest = { 0 };
+    BACNET_NPDU_DATA npdu_data = { 0 };
+    uint16_t pdu_len = 0;
+
+    M5StamPLC.update();
+
+    for (uint8_t i = 0; i < bacnet_app_input_count(); i++) {
+        bool state = M5StamPLC.readPlcInput(i);
+#if PLC_INPUT_ACTIVE_LOW
+        state = !state;
+#endif
+        bacnet_app_input_set(i, state);
+    }
+
+    for (uint8_t i = 0; i < bacnet_app_relay_count(); i++) {
+        M5StamPLC.writePlcRelay(i, bacnet_app_relay_get(i));
+    }
+
+    bacnet_app_temperature_set(M5StamPLC.getTemp());
+    bacnet_app_free_heap_kb_set((float)ESP.getFreeHeap() / 1024.0f);
+
+    pdu_len = bip_receive(&src, BipRxBuffer, sizeof(BipRxBuffer), 0);
+    if (pdu_len > 0) {
+        int apdu_offset =
+            bacnet_npdu_decode(BipRxBuffer, pdu_len, &dest, &src, &npdu_data);
+        if ((apdu_offset > 0) && should_process_locally(&dest)) {
+            npdu_handler(&src, BipRxBuffer, pdu_len);
+        }
+        forward_pdu(true, &src, BipRxBuffer, pdu_len);
+    }
+
+    pdu_len = dlmstp_receive(&src, MstpRxBuffer, sizeof(MstpRxBuffer), 0);
+    if (pdu_len > 0) {
+        forward_pdu(false, &src, MstpRxBuffer, pdu_len);
+    }
+
+    tsm_timer_milliseconds(1);
+
+    delay(1);
+}

ports/esp32/src/mstimer_init.c

@@ -0,0 +1,26 @@
+/**
+ * @file
+ * @brief BACnet millisecond timer hooks for the PlatformIO ESP32 port
+ * @author Kato Gangstad
+ */
+
+#include "mstimer_init.h"
+
+#include "esp_timer.h"
+
+/**
+ * @brief Initialize the system timer services used by BACnet
+ */
+void systimer_init(void)
+{
+    /* esp_timer is available after runtime startup on ESP32. */
+}
+
+/**
+ * @brief Get the current millisecond tick count
+ * @return milliseconds since startup
+ */
+unsigned long mstimer_now(void)
+{
+    return (unsigned long)(esp_timer_get_time() / 1000ULL);
+}

ports/esp32/src/mstimer_init.h

@@ -0,0 +1,32 @@
+/**
+ * @file
+ * @brief BACnet millisecond timer hook declarations for the PlatformIO ESP32
+ * port
+ * @author Kato Gangstad
+ */
+
+#ifndef M5STAMPLC_MSTIMER_INIT_H
+#define M5STAMPLC_MSTIMER_INIT_H
+
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @brief Initialize the system timer services used by BACnet
+ */
+void systimer_init(void);
+
+/**
+ * @brief Get the current millisecond tick count
+ * @return milliseconds since startup
+ */
+unsigned long mstimer_now(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif

ports/esp32/src/rs485.c

@@ -0,0 +1,184 @@
+/**
+ * @file
+ * @brief RS485 UART driver used by BACnet MS/TP on ESP32
+ * @author Kato Gangstad
+ */
+
+#include "rs485.h"
+
+#include <driver/gpio.h>
+#include <driver/uart.h>
+
+/* UART_SCLK_DEFAULT was introduced in ESP-IDF v5.0.
+   Fall back to UART_SCLK_APB for older IDF/Arduino-ESP32 toolchains. */
+#ifndef UART_SCLK_DEFAULT
+#define UART_SCLK_DEFAULT UART_SCLK_APB
+#endif
+
+#include "bacnet/basic/sys/mstimer.h"
+
+static bool Rs485_RTS_Enabled;
+static uint32_t Rs485_Baud_Rate = RS485_BAUD_RATE;
+static volatile uint32_t Rs485_Bytes_Tx;
+static volatile uint32_t Rs485_Bytes_Rx;
+static struct mstimer Silence_Timer;
+
+/**
+ * @brief Initialize the RS485 UART peripheral for BACnet MS/TP
+ */
+void rs485_init(void)
+{
+    uart_config_t cfg = { .baud_rate = (int)Rs485_Baud_Rate,
+                          .data_bits = UART_DATA_8_BITS,
+                          .parity = UART_PARITY_DISABLE,
+                          .stop_bits = UART_STOP_BITS_1,
+                          .flow_ctrl = UART_HW_FLOWCTRL_DISABLE,
+                          .source_clk = UART_SCLK_DEFAULT };
+
+    (void)uart_driver_delete(RS485_UART_NUM);
+    (void)uart_param_config(RS485_UART_NUM, &cfg);
+    (void)uart_set_pin(
+        RS485_UART_NUM, RS485_TX_PIN, RS485_RX_PIN, RS485_DIR_PIN,
+        UART_PIN_NO_CHANGE);
+    (void)uart_driver_install(RS485_UART_NUM, 1024, 0, 0, NULL, 0);
+    (void)uart_set_mode(RS485_UART_NUM, UART_MODE_RS485_HALF_DUPLEX);
+
+    Rs485_RTS_Enabled = false;
+    Rs485_Bytes_Tx = 0;
+    Rs485_Bytes_Rx = 0;
+    rs485_silence_reset();
+}
+
+/**
+ * @brief Update the cached RS485 transmit-enable state
+ * @param enable true when transmit is active
+ */
+void rs485_rts_enable(bool enable)
+{
+    /* Hardware RS485 half-duplex mode drives DIR. Keep state for stack queries.
+     */
+    Rs485_RTS_Enabled = enable;
+}
+
+/**
+ * @brief Check whether the RS485 transmit-enable state is active
+ * @return true if transmit is active
+ */
+bool rs485_rts_enabled(void)
+{
+    return Rs485_RTS_Enabled;
+}
+
+/**
+ * @brief Read one byte from the RS485 receive FIFO when available
+ * @param data_register destination for the received byte, or NULL to probe only
+ * @return true if at least one byte is available
+ */
+bool rs485_byte_available(uint8_t *data_register)
+{
+    size_t buffered = 0;
+    (void)uart_get_buffered_data_len(RS485_UART_NUM, &buffered);
+    if (buffered == 0U) {
+        return false;
+    }
+    if (!data_register) {
+        return true;
+    }
+
+    if (uart_read_bytes(RS485_UART_NUM, data_register, 1, 0) == 1) {
+        Rs485_Bytes_Rx++;
+        rs485_silence_reset();
+        return true;
+    }
+
+    return false;
+}
+
+/**
+ * @brief Report whether an RS485 receive error is pending
+ * @return true if a receive error is detected
+ */
+bool rs485_receive_error(void)
+{
+    /* In Arduino-ESP32 builds, low-level UART error queues are not always
+     * exposed. */
+    return false;
+}
+
+/**
+ * @brief Send a block of RS485 bytes
+ * @param buffer transmit buffer
+ * @param nbytes number of bytes to send
+ */
+void rs485_bytes_send(const uint8_t *buffer, uint16_t nbytes)
+{
+    if (!buffer || (nbytes == 0U)) {
+        return;
+    }
+
+    rs485_rts_enable(true);
+    (void)uart_write_bytes(RS485_UART_NUM, (const char *)buffer, nbytes);
+    (void)uart_wait_tx_done(RS485_UART_NUM, pdMS_TO_TICKS(20));
+    Rs485_Bytes_Tx += nbytes;
+    rs485_rts_enable(false);
+    rs485_silence_reset();
+}
+
+/**
+ * @brief Get the configured RS485 baud rate
+ * @return baud rate in bits per second
+ */
+uint32_t rs485_baud_rate(void)
+{
+    return Rs485_Baud_Rate;
+}
+
+/**
+ * @brief Set the RS485 baud rate
+ * @param baud baud rate in bits per second
+ * @return true if the baud rate was applied
+ */
+bool rs485_baud_rate_set(uint32_t baud)
+{
+    if (baud == 0U) {
+        return false;
+    }
+
+    Rs485_Baud_Rate = baud;
+    return (uart_set_baudrate(RS485_UART_NUM, (int)Rs485_Baud_Rate) == ESP_OK);
+}
+
+/**
+ * @brief Get the elapsed silent time on the RS485 bus
+ * @return milliseconds since the last bus activity
+ */
+uint32_t rs485_silence_milliseconds(void)
+{
+    return mstimer_elapsed(&Silence_Timer);
+}
+
+/**
+ * @brief Reset the RS485 silence timer
+ */
+void rs485_silence_reset(void)
+{
+    mstimer_set(&Silence_Timer, 0);
+}
+
+/**
+ * @brief Get the number of transmitted RS485 bytes
+ * @return transmitted byte count
+ */
+uint32_t rs485_bytes_transmitted(void)
+{
+    return Rs485_Bytes_Tx;
+}
+
+/**
+ * @brief Get the number of received RS485 bytes
+ * @return received byte count
+ */
+uint32_t rs485_bytes_received(void)
+{
+    return Rs485_Bytes_Rx;
+}

ports/esp32/src/rs485.h

@@ -0,0 +1,100 @@
+/**
+ * @file
+ * @brief RS485 UART driver declarations used by BACnet MS/TP on ESP32
+ * @author Kato Gangstad
+ */
+
+#ifndef M5STAMPLC_RS485_H
+#define M5STAMPLC_RS485_H
+
+#include <stdbool.h>
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define RS485_UART_NUM UART_NUM_1
+#define RS485_BAUD_RATE 38400
+#define RS485_TX_PIN 0
+#define RS485_RX_PIN 39
+#define RS485_DIR_PIN 46
+
+/**
+ * @brief Initialize the RS485 UART peripheral
+ */
+void rs485_init(void);
+
+/**
+ * @brief Update the cached RS485 transmit-enable state
+ * @param enable true when transmit is active
+ */
+void rs485_rts_enable(bool enable);
+
+/**
+ * @brief Check whether the RS485 transmit-enable state is active
+ * @return true if transmit is active
+ */
+bool rs485_rts_enabled(void);
+
+/**
+ * @brief Read one byte from the RS485 receive FIFO when available
+ * @param data_register destination for the received byte, or NULL to probe only
+ * @return true if a byte is available
+ */
+bool rs485_byte_available(uint8_t *data_register);
+
+/**
+ * @brief Report whether an RS485 receive error is pending
+ * @return true if a receive error is detected
+ */
+bool rs485_receive_error(void);
+
+/**
+ * @brief Send a block of RS485 bytes
+ * @param buffer transmit buffer
+ * @param nbytes number of bytes to send
+ */
+void rs485_bytes_send(const uint8_t *buffer, uint16_t nbytes);
+
+/**
+ * @brief Get the configured RS485 baud rate
+ * @return baud rate in bits per second
+ */
+uint32_t rs485_baud_rate(void);
+
+/**
+ * @brief Set the RS485 baud rate
+ * @param baud baud rate in bits per second
+ * @return true if the baud rate was applied
+ */
+bool rs485_baud_rate_set(uint32_t baud);
+
+/**
+ * @brief Get the elapsed silent time on the RS485 bus
+ * @return milliseconds since the last bus activity
+ */
+uint32_t rs485_silence_milliseconds(void);
+
+/**
+ * @brief Reset the RS485 silence timer
+ */
+void rs485_silence_reset(void);
+
+/**
+ * @brief Get the number of transmitted RS485 bytes
+ * @return transmitted byte count
+ */
+uint32_t rs485_bytes_transmitted(void);
+
+/**
+ * @brief Get the number of received RS485 bytes
+ * @return received byte count
+ */
+uint32_t rs485_bytes_received(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif

ports/esp32/src/sdkconfig.h

@@ -1,125 +0,0 @@
-/*
- *
- * Automatically generated file; DO NOT EDIT.
- * Espressif IoT Development Framework Configuration
- *
- */
-#define CONFIG_GATTC_ENABLE 1
-#define CONFIG_ESP32_PHY_MAX_TX_POWER 20
-#define CONFIG_PHY_ENABLED 1
-#define CONFIG_TRACEMEM_RESERVE_DRAM 0x0
-#define CONFIG_FREERTOS_MAX_TASK_NAME_LEN 16
-#define CONFIG_BLE_SMP_ENABLE 1
-#define CONFIG_IPC_TASK_STACK_SIZE 1024
-#define CONFIG_ESPTOOLPY_FLASHFREQ "40m"
-#define CONFIG_NEWLIB_STDOUT_ADDCR 1
-#define CONFIG_TASK_WDT_CHECK_IDLE_TASK 1
-#define CONFIG_ESPTOOLPY_FLASHSIZE "2MB"
-#define CONFIG_ESP32_WIFI_DYNAMIC_TX_BUFFER 1
-#define CONFIG_ETHERNET 1
-#define CONFIG_INT_WDT 1
-#define CONFIG_ESPTOOLPY_FLASHFREQ_40M 1
-#define CONFIG_LOG_BOOTLOADER_LEVEL_INFO 1
-#define CONFIG_ESPTOOLPY_FLASHSIZE_2MB 1
-#define CONFIG_AWS_IOT_MQTT_PORT 8883
-#define CONFIG_FREERTOS_THREAD_LOCAL_STORAGE_POINTERS 1
-#define CONFIG_ESP32_WIFI_STATIC_RX_BUFFER_NUM 10
-#define CONFIG_LOG_DEFAULT_LEVEL_INFO 1
-#define CONFIG_BT_RESERVE_DRAM 0x10000
-#define CONFIG_ESP32_PANIC_PRINT_REBOOT 1
-#define CONFIG_CONSOLE_UART_BAUDRATE 115200
-#define CONFIG_LWIP_MAX_SOCKETS 10
-#define CONFIG_EMAC_TASK_PRIORITY 20
-#define CONFIG_TIMER_TASK_STACK_DEPTH 2048
-#define CONFIG_FATFS_CODEPAGE 1
-#define CONFIG_ESP32_DEFAULT_CPU_FREQ_160 1
-#define CONFIG_ULP_COPROC_RESERVE_MEM 0
-#define CONFIG_ESPTOOLPY_BAUD 115200
-#define CONFIG_INT_WDT_CHECK_CPU1 1
-#define CONFIG_FLASHMODE_DIO 1
-#define CONFIG_ESPTOOLPY_AFTER_RESET 1
-#define CONFIG_TOOLPREFIX "xtensa-esp32-elf-"
-#define CONFIG_FREERTOS_IDLE_TASK_STACKSIZE 1024
-#define CONFIG_ESP32_WIFI_AMPDU_ENABLED 1
-#define CONFIG_CONSOLE_UART_NUM 0
-#define CONFIG_ESP32_RTC_CLOCK_SOURCE_INTERNAL_RC 1
-#define CONFIG_ESPTOOLPY_BAUD_115200B 1
-#define CONFIG_LWIP_THREAD_LOCAL_STORAGE_INDEX 0
-#define CONFIG_FOUR_UNIVERSAL_MAC_ADDRESS 1
-#define CONFIG_CONSOLE_UART_DEFAULT 1
-#define CONFIG_MBEDTLS_SSL_MAX_CONTENT_LEN 16384
-#define CONFIG_NUMBER_OF_UNIVERSAL_MAC_ADDRESS 4
-#define CONFIG_ESPTOOLPY_FLASHSIZE_DETECT 1
-#define CONFIG_ESP32_ENABLE_COREDUMP_TO_NONE 1
-#define CONFIG_BTDM_CONTROLLER_RUN_CPU 0
-#define CONFIG_TCPIP_TASK_STACK_SIZE 2560
-#define CONFIG_TASK_WDT 1
-#define CONFIG_MAIN_TASK_STACK_SIZE 4096
-#define CONFIG_TASK_WDT_TIMEOUT_S 5
-#define CONFIG_INT_WDT_TIMEOUT_MS 300
-#define CONFIG_ESPTOOLPY_FLASHMODE "dio"
-#define CONFIG_BTC_TASK_STACK_SIZE 3072
-#define CONFIG_BLUEDROID_ENABLED 1
-#define CONFIG_ESPTOOLPY_BEFORE "default_reset"
-#define CONFIG_LOG_DEFAULT_LEVEL 3
-#define CONFIG_FREERTOS_ASSERT_ON_UNTESTED_FUNCTION 1
-#define CONFIG_TIMER_QUEUE_LENGTH 10
-#define CONFIG_ESP32_WIFI_DYNAMIC_RX_BUFFER_NUM 32
-#define CONFIG_ESP32_PHY_MAX_WIFI_TX_POWER 20
-#define CONFIG_ESP32_RTC_CLK_CAL_CYCLES 1024
-#define CONFIG_ESP32_WIFI_NVS_ENABLED 1
-#define CONFIG_AWS_IOT_SDK 1
-#define CONFIG_DMA_RX_BUF_NUM 10
-#define CONFIG_TCP_SYNMAXRTX 6
-#define CONFIG_PYTHON "python"
-#define CONFIG_ESP32_TIME_SYSCALL_USE_RTC_FRC1 1
-#define CONFIG_ESPTOOLPY_COMPRESSED 1
-#define CONFIG_PARTITION_TABLE_FILENAME "partitions_singleapp.csv"
-#define CONFIG_LWIP_DHCP_MAX_NTP_SERVERS 1
-#define CONFIG_PARTITION_TABLE_SINGLE_APP 1
-#define CONFIG_WIFI_ENABLED 1
-#define CONFIG_LWIP_DHCP_DOES_ARP_CHECK 1
-#define CONFIG_SYSTEM_EVENT_TASK_STACK_SIZE 4096
-#define CONFIG_ESP32_DEEP_SLEEP_WAKEUP_DELAY 2000
-#define CONFIG_ESP32_APPTRACE_DEST_NONE 1
-#define CONFIG_PARTITION_TABLE_CUSTOM_APP_BIN_OFFSET 0x10000
-#define CONFIG_ESP32_WIFI_DYNAMIC_TX_BUFFER_NUM 32
-#define CONFIG_FATFS_CODEPAGE_ASCII 1
-#define CONFIG_TASK_WDT_CHECK_IDLE_TASK_CPU1 1
-#define CONFIG_ESP32_DEFAULT_CPU_FREQ_MHZ 160
-#define CONFIG_FREERTOS_HZ 100
-#define CONFIG_LOG_COLORS 1
-#define CONFIG_ESP32_PHY_CALIBRATION_AND_DATA_STORAGE 1
-#define CONFIG_FREERTOS_ASSERT_FAIL_ABORT 1
-#define CONFIG_ESP32_XTAL_FREQ 0
-#define CONFIG_MONITOR_BAUD_115200B 1
-#define CONFIG_LOG_BOOTLOADER_LEVEL 3
-#define CONFIG_SMP_ENABLE 1
-#define CONFIG_ESPTOOLPY_BEFORE_RESET 1
-#define CONFIG_ESPTOOLPY_BAUD_OTHER_VAL 115200
-#define CONFIG_ESP32_XTAL_FREQ_AUTO 1
-#define CONFIG_TCP_MAXRTX 12
-#define CONFIG_ESPTOOLPY_AFTER "hard_reset"
-#define CONFIG_DMA_TX_BUF_NUM 10
-#define CONFIG_ESP32_DEBUG_OCDAWARE 1
-#define CONFIG_TIMER_TASK_PRIORITY 1
-#define CONFIG_BT_ENABLED 1
-#define CONFIG_MONITOR_BAUD 115200
-#define CONFIG_FREERTOS_CORETIMER_0 1
-#define CONFIG_PARTITION_TABLE_CUSTOM_FILENAME "partitions.csv"
-#define CONFIG_MBEDTLS_HAVE_TIME 1
-#define CONFIG_FREERTOS_CHECK_STACKOVERFLOW_CANARY 1
-#define CONFIG_GATTS_ENABLE 1
-#define CONFIG_FREERTOS_ISR_STACKSIZE 1536
-#define CONFIG_OPENSSL_ASSERT_DO_NOTHING 1
-#define CONFIG_AWS_IOT_MQTT_HOST ""
-#define CONFIG_SYSTEM_EVENT_QUEUE_SIZE 32
-#define CONFIG_BT_ACL_CONNECTIONS 4
-#define CONFIG_FATFS_MAX_LFN 255
-#define CONFIG_ESP32_WIFI_TX_BUFFER_TYPE 1
-#define CONFIG_APP_OFFSET 0x10000
-#define CONFIG_MEMMAP_SMP 1
-#define CONFIG_SPI_FLASH_ROM_DRIVER_PATCH 1
-#define CONFIG_MONITOR_BAUD_OTHER_VAL 115200
-#define CONFIG_ESPTOOLPY_PORT "/dev/ttyUSB0"
-#define CONFIG_OPTIMIZATION_LEVEL_RELEASE 1