Added demo for PIC18F6720 with MS/TP datalink layer. Untested.

bacnet-stack/demo/handler/h_rp.c

@@ -54,7 +54,8 @@ static uint8_t Temp_Buf[MAX_APDU] = { 0 };
 
 void handler_read_property(uint8_t * service_request,
     uint16_t service_len,
-    BACNET_ADDRESS * src, BACNET_CONFIRMED_SERVICE_DATA * service_data)
+    BACNET_ADDRESS * src, 
+    BACNET_CONFIRMED_SERVICE_DATA * service_data)
 {
     BACNET_READ_PROPERTY_DATA data;
     int len = 0;
@@ -76,14 +77,15 @@ void handler_read_property(uint8_t * service_request,
     if (len <= 0)
         fprintf(stderr, "Unable to decode Read-Property Request!\n");
 #endif
-    /* bad decoding - send an abort */
     if (len < 0) {
+        /* bad decoding - send an abort */
         len = abort_encode_apdu(&Handler_Transmit_Buffer[pdu_len],
             service_data->invoke_id, ABORT_REASON_OTHER, true);
 #if PRINT_ENABLED
         fprintf(stderr, "Sending Abort!\n");
 #endif
     } else if (service_data->segmented_message) {
+        /* we don't support segmentation - send an abort */
         len = abort_encode_apdu(&Handler_Transmit_Buffer[pdu_len],
             service_data->invoke_id,
             ABORT_REASON_SEGMENTATION_NOT_SUPPORTED, true);