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esp8266/modmachine: idle(): Return number of CPU cycles spent idling.

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Useful to better understand esp8266 inner workings and compare behavior
in different cases.
This commit is contained in:
Paul Sokolovsky 2016-10-04 21:20:47 +03:00
parent addd1d3db1
commit 52784bf595
1 changed files with 3 additions and 1 deletions
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esp8266/modmachine.c
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@ -86,8 +86,10 @@ STATIC mp_obj_t machine_unique_id(void) {
STATIC MP_DEFINE_CONST_FUN_OBJ_0(machine_unique_id_obj, machine_unique_id);
STATIC mp_obj_t machine_idle(void) {
uint32_t t = mp_hal_ticks_cpu();
asm("waiti 0");
return mp_const_none;
t = mp_hal_ticks_cpu() - t;
return MP_OBJ_NEW_SMALL_INT(t);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_0(machine_idle_obj, machine_idle);