Changed ATmega168 port to ATmega328 on Uno R3 with DFR0259 RS485 shield (#784)
* Changed ATmega168 example for ATmega328 on Arduino Uno R3 with DFR0259 RS485 shield. Added ADC interface from BDK port and mapped to some AV objects. Removed MS/TP MAC address DIP switch GPIO and moved MS/TP configuration to AV objects. Added AV units property. Added some Uno R3 Digital Inputs and outputs mapped to some BV. Added AVR EEPROM from BDK port and mapped some non-volatile data including MAC address and max manager and baud rate, device ID and names and description and location.
This commit is contained in:
Steve Karg
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/**
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* @brief This module manages the main C code for the BACnet demo
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* @author Steve Karg <skarg@users.sourceforge.net>
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* @date 2007
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* @copyright SPDX-License-Identifier: MIT
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*/
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#include <stdbool.h>
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#include <stdint.h>
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#include "hardware.h"
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#include "adc.h"
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#include "nvdata.h"
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#include "rs485.h"
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#include "stack.h"
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#include "bacnet/datalink/datalink.h"
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#include "bacnet/npdu.h"
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#include "bacnet/dcc.h"
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#include "bacnet/basic/services.h"
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#include "bacnet/basic/sys/mstimer.h"
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#include "bacnet/basic/tsm/tsm.h"
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#include "bacnet/iam.h"
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#include "bacnet/basic/object/device.h"
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#include "bacnet/basic/object/av.h"
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#include "bacnet/basic/object/bv.h"
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/* From the WhoIs hander - performed by the DLMSTP module */
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extern bool Send_I_Am_Flag;
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/* main loop task timer */
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static struct mstimer Task_Timer;
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/* uptime */
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static uint32_t Uptime_Seconds;
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/* dummy function - so we can use default demo handlers */
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bool dcc_communication_enabled(void)
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{
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return true;
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}
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static void hardware_init(void)
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{
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/* Initialize the Clock Prescaler for ATmega48/88/168 */
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/* The default CLKPSx bits are factory set to 0011 */
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/* Enbable the Clock Prescaler */
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CLKPR = _BV(CLKPCE);
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/* CLKPS3 CLKPS2 CLKPS1 CLKPS0 Clock Division Factor
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------ ------ ------ ------ ---------------------
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0 0 0 0 1
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0 0 0 1 2
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0 0 1 0 4
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0 0 1 1 8
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0 1 0 0 16
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0 1 0 1 32
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0 1 1 0 64
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0 1 1 1 128
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1 0 0 0 256
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1 x x x Reserved
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*/
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/* Set the CLKPS3..0 bits to Prescaler of 1 */
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CLKPR = 0;
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/* Initialize I/O ports */
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/* For Port DDRx (Data Direction) Input=0, Output=1 */
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/* For Port PORTx (Bit Value) TriState=0, High=1 */
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DDRB = 0;
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PORTB = 0;
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DDRC = 0;
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PORTC = 0;
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DDRD = 0;
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PORTD = 0;
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/* Configure the watchdog timer - Disabled for testing */
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BIT_CLEAR(MCUSR, WDRF);
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WDTCSR = 0;
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/* Configure Specialized Hardware */
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RS485_Initialize();
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mstimer_init();
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adc_init();
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/* Enable global interrupts */
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__enable_interrupt();
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}
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/**
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* @brief process some values once per second
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*/
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static void one_second_task(void)
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{
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BACNET_BINARY_PV value;
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float hours;
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/* LED toggling */
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value = Binary_Value_Present_Value(99);
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if (value == BINARY_ACTIVE) {
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value = BINARY_INACTIVE;
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} else {
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value = BINARY_ACTIVE;
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}
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Binary_Value_Present_Value_Set(99, value);
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/* uptime */
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Uptime_Seconds += 1;
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hours = (float)Uptime_Seconds / 3600.0f;
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Analog_Value_Present_Value_Set(99, hours, 0);
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}
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/**
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* Initialize the device's non-volatile data
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*/
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static void device_nvdata_init(void)
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{
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uint8_t value8;
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uint16_t value16;
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uint32_t value32;
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const char *default_name = "AVR Device";
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const char *default_description = "Description";
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const char *default_location = "Location";
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value16 = nvdata_unsigned16(NV_EEPROM_TYPE_0);
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if (value16 != NV_EEPROM_TYPE_ID) {
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/* set to defaults */
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nvdata_unsigned16_set(NV_EEPROM_TYPE_0, NV_EEPROM_TYPE_ID);
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nvdata_unsigned8_set(NV_EEPROM_VERSION, NV_EEPROM_VERSION_ID);
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nvdata_unsigned8_set(NV_EEPROM_MSTP_MAC, 123);
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nvdata_unsigned8_set(NV_EEPROM_MSTP_BAUD_K, 38);
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nvdata_unsigned8_set(NV_EEPROM_MSTP_MAX_MASTER, 127);
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nvdata_unsigned24_set(NV_EEPROM_DEVICE_0, 260123);
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nvdata_name_set(
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NV_EEPROM_DEVICE_NAME, CHARACTER_UTF8, default_name,
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strlen(default_name));
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nvdata_name_set(
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NV_EEPROM_DEVICE_DESCRIPTION, CHARACTER_UTF8, default_description,
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strlen(default_description));
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nvdata_name_set(
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NV_EEPROM_DEVICE_LOCATION, CHARACTER_UTF8, default_location,
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strlen(default_location));
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}
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value8 = nvdata_unsigned8(NV_EEPROM_MSTP_MAC);
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dlmstp_set_mac_address(value8);
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value8 = nvdata_unsigned8(NV_EEPROM_MSTP_BAUD_K);
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value32 = RS485_Baud_Rate_From_Kilo(value8);
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RS485_Set_Baud_Rate(value32);
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value8 = nvdata_unsigned8(NV_EEPROM_MSTP_MAX_MASTER);
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if (value8 > 127) {
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value8 = 127;
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}
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dlmstp_set_max_master(value8);
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dlmstp_set_max_info_frames(1);
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Send_I_Am_Flag = true;
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}
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/**
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* Static receive buffer,
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* initialized with zeros by the C Library Startup Code.
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* Note: Added a little safety margin to the buffer,
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* so that in the rare case, the message would be filled
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* up to MAX_MPDU and some decoding functions would overrun,
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* these decoding functions will just end up in a safe field
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* of static zeros. */
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static uint8_t PDUBuffer[MAX_MPDU + 16];
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/**
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* Main function
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* @return 0, should never reach this
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*/
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int main(void)
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{
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uint16_t pdu_len = 0;
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BACNET_ADDRESS src; /* source address */
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hardware_init();
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Analog_Value_Init();
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Binary_Value_Init();
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device_nvdata_init();
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dlmstp_init(NULL);
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mstimer_set(&Task_Timer, 1000);
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for (;;) {
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/* process */
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if (mstimer_expired(&Task_Timer)) {
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mstimer_reset(&Task_Timer);
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one_second_task();
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}
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/* BACnet handling */
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pdu_len = dlmstp_receive(&src, &PDUBuffer[0], MAX_MPDU, 0);
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if (pdu_len) {
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npdu_handler(&src, &PDUBuffer[0], pdu_len);
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}
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}
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}
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