Hi All,
I need a watchdog in my app and I'm using IRIS platform (use atmega1281 as
MPU) . So i want to test the watchdog first. But something strange is: when
run with atmega1281, after the watchdog time-out, software can't start-up
again, which seems like the MPU haven't start. but when the same app run
with atmega128, all things are as expected -- the software run, then
watchdog time-out and reset the MPU, software start again, and loop.
So i come here and ask for help -- what the problem may be? Many Thanks.
Here is my simple test app:
module wdtC
{
uses interface Boot;
uses interface Leds;
uses interface Timer<TMilli> as Timer;
}
implementation
{
uint8_t firstTime;
uint8_t mcusr_mirror;
void get_mcusr(void) \
__attribute__((naked)) \
__attribute__((section(".init3")));
void get_mcusr(void)
{
mcusr_mirror = MCUSR;
MCUSR = 0;
wdt_disable();
}
event void Boot.booted()
{
firstTime = 1;
call Leds.led0On();
call Leds.led1On();
call Timer.startPeriodic(3000);
}
event void Timer.fired()
{
call Leds.led1Off();
if (firstTime)
{
firstTime = 0;
wdt_enable(WDTO_1S); // the watchdog will time-out after 1s
}
else
{
wdt_reset();
}
call Leds.led2On();
}
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