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[M487] Add ticker API us_ticker_fire_interrupt and lp_ticker_fire_interrupt

pull/4608/head
ccli8 2017-07-20 10:14:57 +08:00
parent b54e7e9639
commit 0803267eab
2 changed files with 24 additions and 19 deletions
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25
targets/TARGET_NUVOTON/TARGET_M480/lp_ticker.c
View File

@ -149,27 +149,26 @@ void lp_ticker_set_interrupt(timestamp_t 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);
// NOTE: With lp_ticker_fire_interrupt() introduced, upper layer would handle past event case.
// This code fragment gets redundant, but it is still kept here for backward-compatible.
void lp_ticker_fire_interrupt(void);
lp_ticker_fire_interrupt();
}
}
void lp_ticker_fire_interrupt(void)
{
// NOTE: This event was in the past. Set the interrupt as pending, but don't process it here.
// This prevents a recursive loop under heavy load which can lead to a stack overflow.
cd_major_minor_clks = cd_minor_clks = 0;
NVIC_SetPendingIRQ(timer3_modinit.irq_n);
}
void lp_ticker_disable_interrupt(void)
{
TIMER_DisableInt((TIMER_T *) NU_MODBASE(timer3_modinit.modname));

18
targets/TARGET_NUVOTON/TARGET_M480/us_ticker.c
View File

@ -152,15 +152,21 @@ void us_ticker_set_interrupt(timestamp_t timestamp)
cd_major_minor_us = delta * US_PER_TICK;
us_ticker_arm_cd();
} else {
cd_major_minor_us = cd_minor_us = 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(timer1hires_modinit.irq_n);
// NOTE: With us_ticker_fire_interrupt() introduced, upper layer would handle past event case.
// This code fragment gets redundant, but it is still kept here for backward-compatible.
void us_ticker_fire_interrupt(void);
us_ticker_fire_interrupt();
}
}
void us_ticker_fire_interrupt(void)
{
// NOTE: This event was in the past. Set the interrupt as pending, but don't process it here.
// This prevents a recursive loop under heavy load which can lead to a stack overflow.
cd_major_minor_us = cd_minor_us = 0;
NVIC_SetPendingIRQ(timer1hires_modinit.irq_n);
}
static void tmr0_vec(void)
{
TIMER_ClearIntFlag((TIMER_T *) NU_MODBASE(timer0hires_modinit.modname));