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cpu/esp32: small fix of rtc_init for light sleep

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`rtc_init` is used after light sleep to update the system time from RTC timer. The fix corrects a small difference of about 230 ms which would sum up with each wakeup from light sleep.
This commit is contained in:
Gunar Schorcht 2020-02-19 10:27:21 +01:00
parent 825b01e8e1
commit 2cbf90d9fe
1 changed files with 4 additions and 6 deletions
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10
cpu/esp32/periph/rtc.c
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@ -101,21 +101,19 @@ static void IRAM_ATTR _rtc_timer_handler(void* arg);
void rtc_init(void)
{
uint64_t _rtc_time_us = _rtc_time_to_us(_rtc_get_time_raw());
uint64_t _rtc_time = _rtc_get_time_raw();
uint64_t _rtc_time_us = _rtc_time_to_us(_rtc_time);
if (_rtc_time_init == 0 && _rtc_time_init_us == 0) {
/* only set it new, if it was not set before */
_rtc_time_init = _rtc_get_time_raw();
_rtc_time_init = _rtc_time;
_rtc_time_init_us = _rtc_time_us;
_sys_time_off_us = 0;
DEBUG("%s saved rtc_init=%lld rtc_init_us=%lld\n",
__func__, _rtc_time_init, _rtc_time_init_us);
}
else {
_sys_time_off_us = _rtc_time_us - _rtc_time_set_us;
}
_sys_time_off_us = _rtc_time_us - _rtc_time_set_us - system_get_time_64();
_sys_time_set_us = 0;
}