Add Raspberry Pi Pico port (#1232)

* Add Raspberry Pi Pico port - Adds BACnet/IP with abstracted network layer - Adds BACnet MS/TP support using RS485/UART - Includes README with examples * Add Pico 2 MS/TP demo, CI, and docs
2026-03-25 14:22:09 +01:00
parent 5eda68d381
commit 17e94092a1
17 changed files with 1720 additions and 0 deletions
@@ -0,0 +1,116 @@
+/**************************************************************************
+ *
+ * Copyright (C) 2005 Steve Karg
+ * Copyright (C) 2025 Testimony Adams <adamstestimony@gmail.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later WITH GCC-exception-2.0
+ *
+ *********************************************************************/
+#include <stdint.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <string.h>
+#include "bacnet/bacdcode.h"
+#include "bip.h"
+
+/** @file pico/bip-init.c  Initializes BACnet/IP interface (Pico). */
+
+static bool BIP_Debug = false;
+
+/**
+ * @brief Enabled debug printing of BACnet/IPv4
+ */
+void bip_debug_enable(void)
+{
+    BIP_Debug = true;
+}
+
+/**
+ * @brief Disable debug printing of BACnet/IPv4
+ */
+void bip_debug_disable(void)
+{
+    BIP_Debug = false;
+}
+
+/* gets an IP address by name, where name can be a
+   string that is an IP address in dotted form, or
+   a name that is a domain name
+   returns 0 if not found, or
+   an IP address in network byte order */
+long bip_getaddrbyname(const char *host_name)
+{
+    (void)host_name;
+    return 0;
+}
+
+/** Gets the local IP address and local broadcast address from the system,
+ *  and saves it into the BACnet/IP data structures.
+ */
+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 invertedNetmask[] = { 0, 0, 0, 0 };
+    int i;
+
+    /* Get network info from platform-specific function */
+    if (!bip_get_local_network_info(local_address, netmask)) {
+        return;
+    }
+
+    bip_set_addr(local_address);
+
+    /* setup local broadcast address */
+    for (i = 0; i < 4; i++) {
+        invertedNetmask[i] = ~netmask[i];
+        broadcast_address[i] = (local_address[i] | invertedNetmask[i]);
+    }
+
+    bip_set_broadcast_addr(broadcast_address);
+}
+
+/** Initialize the BACnet/IP services at the given interface.
+ * @ingroup DLBIP
+ * -# Gets the local IP address and local broadcast address from the system,
+ *  and saves it into the BACnet/IP data structures.
+ * -# Opens a UDP socket
+ * -# Configures the socket for sending and receiving
+ * -# Configures the socket so it can send broadcasts
+ * -# Binds the socket to the local IP address at the specified port for
+ *    BACnet/IP (by default, 0xBAC0 = 47808).
+ *
+ * @note For Linux, ifname is eth0, ath0, arc0, and others.
+ *
+ * @param port [in] UDP port to use for BACnet/IP
+ * @return True if the socket is successfully opened for BACnet/IP,
+ *         else False if the socket functions fail.
+ */
+bool bip_init(uint16_t port)
+{
+    /* Initialize the socket using platform-specific function */
+    if (!bip_socket_init(port)) {
+        return false;
+    }
+
+    bip_set_interface();
+    bip_set_port(port);
+
+    /* Mark socket as valid (0 is a valid socket ID for Pico) */
+    bip_set_socket(0);
+
+    return true;
+}
+
+/** Cleanup and close out the BACnet/IP services by closing the socket.
+ * @ingroup DLBIP
+ */
+void bip_cleanup(void)
+{
+    if (bip_valid()) {
+        bip_socket_cleanup();
+    }
+
+    return;
+}