testacksp.nc

无线传感器网络操作系统tinyos下的cc2420测试驱动程序

/*
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/**
 * Test for radio acknowledgements
 * Program all motes up with ID 1
 *   Led0 = Missed an ack
 *   Led1 = Got an ack
 *   Led2 = Sent a message
 * @author David Moss
 */
 
module TestAcksP {
  uses {
    interface Boot;
    interface SplitControl;
    interface AMSend;
    interface Receive;
    interface Leds;
    interface PacketAcknowledgements;
    interface Timer<TMilli>;
  }
}

implementation {
  
  /** Message to transmit */
  message_t myMsg;
  
  enum {  
    DELAY_BETWEEN_MESSAGES = 50,
  };
  
  
  /***************** Prototypes ****************/
  task void send();
  
  /***************** Boot Events ****************/
  event void Boot.booted() {
    call SplitControl.start();
  }
  
  /***************** SplitControl Events ****************/
  event void SplitControl.startDone(error_t error) {
    post send();
  }
  
  event void SplitControl.stopDone(error_t error) {
  }
  
  /***************** Receive Events ****************/
  event message_t *Receive.receive(message_t *msg, void *payload, uint8_t len) {
    call Leds.led2Toggle();
    return msg;
  }
  
  /***************** AMSend Events ****************/
  event void AMSend.sendDone(message_t *msg, error_t error) {
    if(call PacketAcknowledgements.wasAcked(msg)) {
      call Leds.led1Toggle();
      call Leds.led0Off();
    } else {
      call Leds.led0Toggle();
      call Leds.led1Off();
    }
    
    if(DELAY_BETWEEN_MESSAGES > 0) {
      call Timer.startOneShot(DELAY_BETWEEN_MESSAGES);
    } else {
      post send();
    }
  }
  
  /***************** Timer Events ****************/
  event void Timer.fired() {
    post send();
  }
  
  /***************** Tasks ****************/
  task void send() {
    call PacketAcknowledgements.requestAck(&myMsg);
    if(call AMSend.send(1, &myMsg, 0) != SUCCESS) {
      post send();
    }
  }
}