Send Periodic Messages

Signal Functions are created within the µVision Debugger and can periodically send messages to the application.

The following signal function sends a message with two bytes 10 times per second. The function receives an info value that gets incremented and transmitted to the application:

SIGNAL void sendCAN (unsigned int info)  {
 while (1)  {
    CAN0ID = 0x4510;          // CAN message ID
    CAN0L  = 2;               // message length 2 bytes
    CAN0B0 = (info & 0xFF);   // message data byte 0
    CAN0B1 = (info >> 8);     // message data byte 1
    CAN0IN = 2;               // send CAN message with 29-bit ID
    twatch (CLOCK / 10);      // send message 10 times per second
    info++;                   // increment info value
  }
}

>sendCAN (500);    // invoke sendCAN function