diff options
| -rw-r--r-- | stmhal/systick.c | 17 |
1 files changed, 5 insertions, 12 deletions
diff --git a/stmhal/systick.c b/stmhal/systick.c index 71e3d3488..4eac583e2 100644 --- a/stmhal/systick.c +++ b/stmhal/systick.c @@ -51,24 +51,17 @@ void HAL_Delay(uint32_t Delay) { } // Core delay function that does an efficient sleep and may switch thread context. -// Note: Upon entering this function we may or may not have the GIL. +// If IRQs are enabled then we must have the GIL. void mp_hal_delay_ms(mp_uint_t Delay) { if (query_irq() == IRQ_STATE_ENABLED) { // IRQs enabled, so can use systick counter to do the delay uint32_t start = uwTick; // Wraparound of tick is taken care of by 2's complement arithmetic. while (uwTick - start < Delay) { - // Enter sleep mode, waiting for (at least) the SysTick interrupt. - mp_handle_pending(); - #if MICROPY_PY_THREAD - if (pyb_thread_enabled) { - pyb_thread_yield(); - } else { - __WFI(); - } - #else - __WFI(); - #endif + // This macro will execute the necessary idle behaviour. It may + // raise an exception, switch threads or enter sleep mode (waiting for + // (at least) the SysTick interrupt). + MICROPY_EVENT_POLL_HOOK } } else { // IRQs disabled, so need to use a busy loop for the delay. |