From ee12581a3545c6e950b4a2b5322167eb73326928 Mon Sep 17 00:00:00 2001 From: puuu Date: Sat, 4 Jun 2016 00:21:26 +0900 Subject: esp8266: Let RTC work correctly after deepsleep. By design, at wake up from deepsleep, the RTC timer will be reset, but the data stored in RTC memory will not [1]. Therefore, we have to adjust delta in RTC memory before going into deepsleep to get almost correct time after waking up. [1] http://bbs.espressif.com/viewtopic.php?t=1184#p4082 --- esp8266/modpybrtc.c | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'esp8266/modpybrtc.c') diff --git a/esp8266/modpybrtc.c b/esp8266/modpybrtc.c index 484d0d82fd..9685248034 100644 --- a/esp8266/modpybrtc.c +++ b/esp8266/modpybrtc.c @@ -120,6 +120,12 @@ uint64_t pyb_rtc_get_us_since_2000() { return (((uint64_t)rtc_ticks * cal) >> 12) + delta; }; +void rtc_prepare_deepsleep(uint64_t sleep_us) { + // RTC time will reset at wake up. Let's be preared for this. + int64_t delta = pyb_rtc_get_us_since_2000() + sleep_us; + system_rtc_mem_write(MEM_DELTA_ADDR, &delta, sizeof(delta)); +} + STATIC mp_obj_t pyb_rtc_datetime(mp_uint_t n_args, const mp_obj_t *args) { if (n_args == 1) { // Get time -- cgit v1.2.3