static char
rtimer_task(struct rtimer *t, void *ptr)
{
PT_BEGIN(&pt);
while (1) {
leds_on(LEDS_ALL);
rtimer_set(t, RTIMER_NOW() + LEDS_ON_PERIOD, 0, (rtimer_callback_t)rtimer_task, NULL);
PT_YIELD(&pt);
leds_off(LEDS_ALL);
rtimer_set(t, timesynch_time_to_rtimer(0), 0, (rtimer_callback_t)rtimer_task, NULL);
PT_YIELD(&pt);
}
PT_END(&pt);
}
/*---------------------------------------------------------------------------*/
PROCESS_THREAD(timesync_master_process, ev, data)
{
static struct etimer et;
PROCESS_BEGIN();
timesynch_set_authority_level(0);
PT_INIT(&pt);
// wait until network is synchronized
etimer_set(&et, SYNCH_PERIOD);
PROCESS_WAIT_UNTIL(etimer_expired(&et));
rtimer_set(&rt, timesynch_time_to_rtimer(0), 0, (rtimer_callback_t)rtimer_task, NULL);
PROCESS_END();
}
/*---------------------------------------------------------------------------*/
static char
powercycle(struct rtimer *t, void *ptr)
{
int r;
#if WITH_TIMESYNCH
rtimer_clock_t should_be, adjust;
#endif /* WITH_TIMESYNCH */
CPRINTF("*");
PT_BEGIN(&pt);
while(1) {
/* Only wait for some cycles to pass for someone to start sending */
if(someone_is_sending > 0) {
someone_is_sending--;
}
if(xmac_config.off_time > 0) {
if(waiting_for_packet == 0) {
if(we_are_sending == 0) {
off();
}
} else {
waiting_for_packet++;
if(waiting_for_packet > 2) {
/* We should not be awake for more than two consecutive
power cycles without having heard a packet, so we turn off
the radio. */
waiting_for_packet = 0;
#if WITH_TIMETABLE
TIMETABLE_TIMESTAMP(xmac_timetable, "off waiting");
#endif
off();
}
}
#if WITH_TIMESYNCH
#define NUM_SLOTS 8
should_be = ((timesynch_rtimer_to_time(RTIMER_TIME(t)) +
xmac_config.off_time) &
~(xmac_config.off_time + xmac_config.on_time - 1)) +
(rimeaddr_node_addr.u8[0] % NUM_SLOTS *
((xmac_config.off_time + xmac_config.on_time) / NUM_SLOTS));
should_be = timesynch_time_to_rtimer(should_be);
if(should_be - RTIMER_TIME(t) > xmac_config.off_time) {
adjust = xmac_config.off_time / 2;
} else {
adjust = should_be - RTIMER_TIME(t);
}
r = rtimer_set(t, RTIMER_TIME(t) + adjust, 1,
(void (*)(struct rtimer *, void *))powercycle, ptr);
#else /* WITH_TIMESYNCH */
r = rtimer_set(t, RTIMER_TIME(t) + xmac_config.off_time, 1,
TC(powercycle), ptr);
#endif /* WITH_TIMESYNCH */
if(r) {
PRINTF("xmac: 1 could not set rtimer %d\n", r);
}
PT_YIELD(&pt);
}
if(we_are_sending == 0 &&
waiting_for_packet == 0) {
on();
}
r = rtimer_set(t, RTIMER_TIME(t) + xmac_config.on_time, 1,
TC(powercycle), ptr);
if(r) {
PRINTF("xmac: 3 could not set rtimer %d\n", r);
}
PT_YIELD(&pt);
}
PT_END(&pt);
}