[Tinyos-help] Cannot turn off the serial port (MicaZ - T2.0.2.2)

[daniel widyanto]

Hi all,

Is there anybody that has the same experience with me ? After the UART
in Micaz is turned off, it cannot be turned on again.

Even though the SplitControl for start and stop returns SUCCESS, I
cannot send anything to the UART.

Here's the sample of my code:
TosUartControlP.nc
-----------------------------------------------------
module TosUartControlP
{
  uses
  {
    interface Boot;
    
    interface Timer<TMilli>;
    
    interface SplitControl as UartControl;
    interface Packet;
    interface AMSend;

    interface Leds;
  }
}
implementation
{
  task void send_packet();
  void blinkLeds();
  void blinkRedLed();
  void blinkGreenLed();
  void blinkYellowLed();

  event void Boot.booted()
  {
    blinkLeds();
    
    // Start sending every 5-sec
    call Timer.startPeriodic(5120);
  }

  event void Timer.fired()
  {
    if (call UartControl.start() == FAIL) {
      blinkRedLed();
    }
  }
  
  event void UartControl.startDone(error_t result)
  {
    if (result == SUCCESS) {
      blinkGreenLed();
      post send_packet();
    }
    else {
      blinkRedLed();
    }
  }

  message_t tosPacket;
  uint8_t messageCounter;
  task void send_packet()
  {
    uint8_t *radioPacket = 
          (uint8_t *) call Packet.getPayload (&tosPacket, NULL);
    
    *radioPacket = messageCounter;
    messageCounter++;
    
    if (call AMSend.send(0x00, &tosPacket, sizeof (uint8_t)) == FAIL)
    {
      blinkRedLed();
    }
  }
  
  event void AMSend.sendDone (message_t * msg, error_t err)
  {
    if ((msg == &tosPacket) && (err == SUCCESS)) {
      call UartControl.stop();
    }
    else {
      blinkRedLed();
    }
  }
  
  event void UartControl.stopDone(error_t error)
  {
    if (error == SUCCESS) {
      blinkYellowLed();
    }
    else {
      blinkRedLed();
    }
  }

  void blinkLeds()
  {
    uint16_t delay;
    
    call Leds.led0On();
    call Leds.led1On();
    call Leds.led2On();
    for (delay = 0; delay < 0xFFFF; delay++);
    call Leds.led0Off();
    call Leds.led1Off();
    call Leds.led2Off(); 
  }

  void blinkRedLed()
  {
    uint16_t delay;

    call Leds.led0On();
    for (delay = 0; delay < 0xFFFF; delay++);
    call Leds.led0Off(); 
  }

  void blinkGreenLed()
  {
    uint16_t delay;

    call Leds.led1On();
    for (delay = 0; delay < 0xFFFF; delay++);
    call Leds.led1Off(); 
  }

  void blinkYellowLed()
  {
    uint16_t delay;

    call Leds.led2On();
    for (delay = 0; delay < 0xFFFF; delay++);
    call Leds.led2Off(); 
  }
}
-----------------------------------------------------
TosUartControlC.nc
configuration TosUartControlC
{
}
implementation
{
  components MainC;
  components TosUartControlP;
  
  TosUartControlP.Boot -> MainC;
  
  components new TimerMilliC() as Timer;
  TosUartControlP.Timer -> Timer;
  
  components SerialActiveMessageC;
  TosUartControlP.UartControl -> SerialActiveMessageC;
  
  components new SerialAMSenderC (0xFF);
  TosUartControlP.Packet -> SerialAMSenderC;
  TosUartControlP.AMSend -> SerialAMSenderC;
  
  components LedsC;
  TosUartControlP.Leds -> LedsC;
}
-----------------------------------------------------
Makefile
COMPONENT=TosUartControlC
include $(MAKERULES)
-----------------------------------------------------

Thanks in advance

Regards,
-daniel



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