I am trying to write a simple program in TinyOS to implement 2 timers, one a periodic timer, and the other a oneshot timer. The periodic timer has to fire every 2 seconds and the oneshot timer should fire at 5th, 7th and 9th second respectively. I have written the program, but the oneshot timer doesn't work. Please help me find the issue.
#include "Timer.h"
module MyTimerC @safe()
{
uses interface Timer<TMilli> as Timer0;
uses interface Timer<TMilli> as Timer1;
uses interface Leds;
uses interface Boot;
}
implementation
{
event void Boot.booted()
{
call Timer0.startOneShot( 5120 );
call Timer0.startOneShot( 7168 );
call Timer0.startOneShot( 9216 );
call Timer1.startPeriodic( 2048 );
}
task void TogLed0()
{
dbg("MyTimerC", "LED 0 Toggle \n");
call Leds.led0Toggle();
}
task void TogLed1()
{
dbg("MyTimerC", "LED 1 Toggle \n");
call Leds.led1Toggle();
}
event void Timer0.fired()
{
dbg("MyTimerC", "One shot Timer 0 fired @ %s \n", sim_time_string());
call Leds.led2Toggle();
}
event void Timer1.fired()
{
dbg("MyTimerC", "Periodic Timer 1 fired @ %s.\n", sim_time_string());
post TogLed0();
post TogLed1();
}
}
You're only supposed to call startOneShot once on a timer - you should only call startOneShot again on the same timer after it has fired. I would suggest either using 3 separate timers for your one shots, or call startOneShot(5 seconds) on boot, then when it fires, call startOneShot again for 2 seconds, then a third time. Use a counter to keep track of how many times it has fired.