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Merge pull request #18920 from jue89/fix/sam0_rtt_rtc

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sam0/rtc_rtt: optimizations to get around the painful long syncwaits
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Juergen Fitschen 2022-11-22 18:12:06 +01:00 committed by GitHub
commit 97bc8252d9
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1 changed files with 38 additions and 28 deletions
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66
cpu/sam0_common/periph/rtc_rtt.c
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@ -588,10 +588,22 @@ int rtc_get_time(struct tm *time)
return 0;
}
static void _rtc_clear_alarm(void)
{
/* disable alarm interrupt */
RTC->MODE2.INTENCLR.reg = RTC_MODE2_INTENCLR_ALARM0;
}
void rtc_clear_alarm(void)
{
_rtc_clear_alarm();
_pm_unblock(&_pm_alarm);
}
int rtc_set_alarm(struct tm *time, rtc_alarm_cb_t cb, void *arg)
{
/* prevent old alarm from ringing */
rtc_clear_alarm();
_rtc_clear_alarm();
/* normalize input */
rtc_tm_normalize(time);
@ -600,18 +612,18 @@ int rtc_set_alarm(struct tm *time, rtc_alarm_cb_t cb, void *arg)
(time->tm_year > (reference_year + 63))) {
return -2;
}
else {
RTC->MODE2.Mode2Alarm[0].ALARM.reg = RTC_MODE2_ALARM_YEAR(time->tm_year - reference_year)
| RTC_MODE2_ALARM_MONTH(time->tm_mon + 1)
| RTC_MODE2_ALARM_DAY(time->tm_mday)
| RTC_MODE2_ALARM_HOUR(time->tm_hour)
| RTC_MODE2_ALARM_MINUTE(time->tm_min)
| RTC_MODE2_ALARM_SECOND(time->tm_sec);
RTC->MODE2.Mode2Alarm[0].MASK.reg = RTC_MODE2_MASK_SEL(6);
}
/* make sure that preceding changes have been applied */
_wait_syncbusy();
RTC->MODE2.Mode2Alarm[0].ALARM.reg = RTC_MODE2_ALARM_YEAR(time->tm_year - reference_year)
| RTC_MODE2_ALARM_MONTH(time->tm_mon + 1)
| RTC_MODE2_ALARM_DAY(time->tm_mday)
| RTC_MODE2_ALARM_HOUR(time->tm_hour)
| RTC_MODE2_ALARM_MINUTE(time->tm_min)
| RTC_MODE2_ALARM_SECOND(time->tm_sec);
RTC->MODE2.Mode2Alarm[0].MASK.reg = RTC_MODE2_MASK_SEL(6);
/* Enable IRQ */
alarm_cb.cb = cb;
alarm_cb.arg = arg;
@ -650,14 +662,6 @@ int rtc_set_time(struct tm *time)
return 0;
}
void rtc_clear_alarm(void)
{
/* disable alarm interrupt */
RTC->MODE2.INTENCLR.reg = RTC_MODE2_INTENCLR_ALARM0;
_pm_unblock(&_pm_alarm);
}
void rtc_poweron(void)
{
_poweron();
@ -713,18 +717,32 @@ uint32_t rtt_get_alarm(void)
return RTC->MODE0.COMP[0].reg;
}
static void _rtt_clear_alarm(void)
{
/* disable compare interrupt */
RTC->MODE0.INTENCLR.reg = RTC_MODE0_INTENCLR_CMP0;
}
void rtt_clear_alarm(void)
{
_rtt_clear_alarm();
_pm_unblock(&_pm_alarm);
}
void rtt_set_alarm(uint32_t alarm, rtt_cb_t cb, void *arg)
{
/* disable interrupt to avoid race */
rtt_clear_alarm();
_rtt_clear_alarm();
/* setup callback */
alarm_cb.cb = cb;
alarm_cb.arg = arg;
/* make sure that preceding changes have been applied */
_wait_syncbusy();
/* set COMP register */
RTC->MODE0.COMP[0].reg = alarm;
_wait_syncbusy();
/* enable compare interrupt and clear flag */
RTC->MODE0.INTFLAG.reg = RTC_MODE0_INTFLAG_CMP0;
@ -736,14 +754,6 @@ void rtt_set_alarm(uint32_t alarm, rtt_cb_t cb, void *arg)
}
}
void rtt_clear_alarm(void)
{
/* disable compare interrupt */
RTC->MODE0.INTENCLR.reg = RTC_MODE0_INTENCLR_CMP0;
_pm_unblock(&_pm_alarm);
}
void rtt_poweron(void)
{
_poweron();