Hi all,
Is there a bug in tos/chips/MSP430/timer/MSP430AlarmC.nc? I would really
appreciate it if anyone could help me about this.
async command void Alarm.startAt( uint16_t t0, uint16_t dt )
{
atomic
{
uint16_t now = call Msp430Timer.get();
uint16_t elapsed = now - t0;//if t0 = 65400, now = 340. bug???
if( elapsed >= dt )
{
call Msp430Compare.setEventFromNow(2);
}
else
{
uint16_t remaining = dt - elapsed; //if elapsed = 65400, dt = 340.
bug???
if( remaining <= 2 )
call Msp430Compare.setEventFromNow(2);
else
call Msp430Compare.setEvent( now+remaining );
}
call Msp430TimerControl.clearPendingInterrupt();
call Msp430TimerControl.enableEvents();
}
}
async command void Alarm.startAt( uint16_t t0, uint16_t dt)
{
atomic
{
uint16_t now = call Msp430Timer.get();
uint16_t elapsed;
//uint16_t elapsed = now - t0;//if t0 = 65400, now = 340. bug???
weishen.MODIFY
// t0 ----------- now. t0 <= now
if(now>t0)
elapsed = now - t0;
else
elapsed = 0xffff-t0 + now;
if( elapsed >= dt )
{
call Msp430Compare.setEventFromNow(2);
}
else
{
//uint16_t remaining = dt - elapsed; //if elapsed = 65400, dt = 340.
bug??? weishen.
uint16_t remaining;
if(dt>elapsed)
remaining = dt - elapsed;
else
remaining = 0xffff - elapsed + dt.
if( remaining <= 2 )
call Msp430Compare.setEventFromNow(2);
else
call Msp430Compare.setEvent( now+remaining );
}
call Msp430TimerControl.clearPendingInterrupt();
call Msp430TimerControl.enableEvents();
}
}
--
Wei Shen
PhD Student in Mid Sweden University, Sweden
[email protected]
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