void lp_ticker_set_interrupt(timestamp_t timestamp)
{
uint32_t now = lp_ticker_read();
wakeup_tick = timestamp;
TIMER_Stop((TIMER_T *) NU_MODBASE(timer3_modinit.modname));
/**
* FIXME: Scheduled alarm may go off incorrectly due to wrap around.
* Conditions in which delta is negative:
* 1. Wrap around
* 2. Newly scheduled alarm is behind now
*/
//int delta = (timestamp > now) ? (timestamp - now) : (uint32_t) ((uint64_t) timestamp + 0xFFFFFFFFu - now);
int delta = (int) (timestamp - now);
if (delta > 0) {
cd_major_minor_clks = (uint64_t) delta * US_PER_TICK * TMR3_CLK_PER_SEC / US_PER_SEC;
lp_ticker_arm_cd();
}
else {
cd_major_minor_clks = cd_minor_clks = 0;
/**
* This event was in the past. Set the interrupt as pending, but don't process it here.
* This prevents a recurive loop under heavy load which can lead to a stack overflow.
*/
NVIC_SetPendingIRQ(timer3_modinit.irq_n);
}
}
static void tmr3_vec(void)
{
TIMER_ClearIntFlag((TIMER_T *) NU_MODBASE(timer3_modinit.modname));
TIMER_ClearWakeupFlag((TIMER_T *) NU_MODBASE(timer3_modinit.modname));
cd_major_minor_ms -= cd_minor_ms;
if (cd_major_minor_ms > 0) {
lp_ticker_arm_cd();
}
}
void lp_ticker_set_interrupt(timestamp_t timestamp)
{
uint32_t delta = timestamp - lp_ticker_read();
wakeup_tick = timestamp;
TIMER_Stop((TIMER_T *) NU_MODBASE(timer3_modinit.modname));
cd_major_minor_clks = (uint64_t) delta * US_PER_TICK * TMR3_CLK_PER_SEC / US_PER_SEC;
lp_ticker_arm_cd();
}
void lp_ticker_set_interrupt(uint32_t now, uint32_t time)
{
wakeup_tick = time;
TIMER_Stop((TIMER_T *) NU_MODBASE(timer3_modinit.modname));
int delta = (time > now) ? (time - now) : (uint32_t) ((uint64_t) time + 0xFFFFFFFFu - now);
// NOTE: If this event was in the past, arm an interrupt to be triggered immediately.
cd_major_minor_ms = delta * MS_PER_TICK;
lp_ticker_arm_cd();
}
static void tmr3_vec(void)
{
TIMER_ClearIntFlag((TIMER_T *) NU_MODBASE(timer3_modinit.modname));
TIMER_ClearWakeupFlag((TIMER_T *) NU_MODBASE(timer3_modinit.modname));
cd_major_minor_clks = (cd_major_minor_clks > cd_minor_clks) ? (cd_major_minor_clks - cd_minor_clks) : 0;
if (cd_major_minor_clks == 0) {
// NOTE: lp_ticker_set_interrupt() may get called in lp_ticker_irq_handler();
lp_ticker_irq_handler();
} else {
lp_ticker_arm_cd();
}
}
