[Tinyos-help] timer

[roberto pagliari]

I'm having troubles using timer. I wrote something like this

 command result_t StdControl.init() {
   call Leds.init();
   return SUCCESS;
 }


 command result_t StdControl.start() {
    outp(0x00, TCCR3A); // no waveform or output toggle
    outp(0x20, TCCR3B); // clk / 8 --> 1 tick = 1usec
    outp(0x00, TCNT3);  // initial value

    outp(0xC3, OCR3AH); // 0xC350 = 50000 ticks = 50ms
    outp(0x50, OCR3AL);
    sbi(ETIMSK,OCIE3A); // enable output compare timer
   return SUCCESS;
 }

 command result_t StdControl.stop() {
   return SUCCESS;
 }

 TOSH_INTERRUPT(SIG_OUTPUT_COMPARE3A) {
   call Leds.redOn();
   // some code
 }


but I can't see the timer switching on the red led. where is the problem
?

thanbks

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