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esp8266/modmachine: Implement simple machine.lightsleep function.

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Use of "waiti 0" reduces power consumption by about 3mA compared to a
time.sleep_ms call.
This commit is contained in:
Damien George 2019-01-30 14:03:43 +11:00
parent 2911e3554a
commit 808dc95ab8
1 changed files with 13 additions and 1 deletions
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14
ports/esp8266/modmachine.c
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@ -97,7 +97,19 @@ STATIC mp_obj_t machine_idle(void) {
STATIC MP_DEFINE_CONST_FUN_OBJ_0(machine_idle_obj, machine_idle);
STATIC mp_obj_t machine_lightsleep(size_t n_args, const mp_obj_t *args) {
printf("Warning: not yet implemented\n");
uint32_t max_us = 0xffffffff;
if (n_args == 1) {
mp_int_t max_ms = mp_obj_get_int(args[0]);
if (max_ms < 0) {
max_ms = 0;
}
max_us = max_ms * 1000;
}
uint32_t start = system_get_time();
while (system_get_time() - start <= max_us) {
ets_event_poll();
asm("waiti 0");
}
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(machine_lightsleep_obj, 0, 1, machine_lightsleep);