Adding MS/TP demo for ATmega168. Not finished yet.

bacnet-stack/ports/atmega168/main.c

@@ -0,0 +1,85 @@
+/**************************************************************************
+*
+* Copyright (C) 2007 Steve Karg <skarg@users.sourceforge.net>
+*
+* Permission is hereby granted, free of charge, to any person obtaining
+* a copy of this software and associated documentation files (the
+* "Software"), to deal in the Software without restriction, including
+* without limitation the rights to use, copy, modify, merge, publish,
+* distribute, sublicense, and/or sell copies of the Software, and to
+* permit persons to whom the Software is furnished to do so, subject to
+* the following conditions:
+*
+* The above copyright notice and this permission notice shall be included
+* in all copies or substantial portions of the Software.
+*
+* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+*
+*********************************************************************/
+
+#include <stdbool.h>
+#include <stdint.h>
+#include "hardware.h"
+#include "timer.h"
+#include "rs485.h"
+
+/* For porting to IAR, see:
+   http://www.avrfreaks.net/wiki/index.php/Documentation:AVR_GCC/IarToAvrgcc*/
+
+static uint16_t Transmit_Timer = 0;
+#define MAX_FRAME 5
+static uint8_t Transmit_Frame[MAX_FRAME] = {0xAA, 0x55, 0x01, 0x45, 0xAB };
+
+void init(void)
+{
+
+    /* Initialize I/O ports */
+    /* For Port DDRx (Data Direction) Input=1, Output=1 */
+    /* For Port PORTx (Bit Value) TriState=0, High=1 */
+
+    DDRB = 0;
+    PORTB = 0;
+    DDRC = 0;
+    PORTC = 0;
+    DDRD = 0;
+    PORTD = 0;
+
+	/* Configure the watchdog timer */
+
+	/* Configure USART */
+    RS485_Set_Baud_Rate(38400);
+    RS485_Initialize();
+
+    /* Configure Timer0 for millisecond timer */
+    timer_initialize();
+}
+
+void task_milliseconds(void)
+{
+    while (Timer_Milliseconds) {
+	    Timer_Milliseconds--;
+		/* add other millisecond timer tasks here */
+        Transmit_Timer++;
+	}
+}
+
+int main(void)
+{
+    init();
+	for (;;) {
+	    task_milliseconds();
+		/* other tasks */
+        if (Transmit_Timer > 1000) {
+            Transmit_Timer = 0;
+            RS485_Send_Frame(NULL,Transmit_Frame, MAX_FRAME);
+        }
+	}
+
+    return 0;
+}