STATIC mp_obj_t machine_deepsleep(void) {
// default to sleep forever
uint32_t sleep_us = 0;
// see if RTC.ALARM0 should wake the device
if (pyb_rtc_alarm0_wake & MACHINE_WAKE_DEEPSLEEP) {
uint64_t t = pyb_rtc_get_us_since_2000();
if (pyb_rtc_alarm0_expiry <= t) {
sleep_us = 1; // alarm already expired so wake immediately
} else {
uint64_t delta = pyb_rtc_alarm0_expiry - t;
if (delta <= 0xffffffff) {
// sleep for the desired time
sleep_us = delta;
} else {
// overflow, just set to maximum sleep time
sleep_us = 0xffffffff;
}
}
}
// prepare for RTC reset at wake up
rtc_prepare_deepsleep(sleep_us);
// put the device in a deep-sleep state
system_deep_sleep_set_option(0); // default power down mode; TODO check this
system_deep_sleep(sleep_us);
for (;;) {
// we must not return
ets_loop_iter();
}
return mp_const_none;
}
STATIC mp_obj_t esp_deepsleep(mp_uint_t n_args, const mp_obj_t *args) {
uint32_t sleep_us = n_args > 0 ? mp_obj_get_int(args[0]) : 0;
// prepare for RTC reset at wake up
rtc_prepare_deepsleep(sleep_us);
system_deep_sleep_set_option(n_args > 1 ? mp_obj_get_int(args[1]) : 0);
system_deep_sleep(sleep_us);
return mp_const_none;
}
