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ESP32: Return correct deep sleep wakeup pin #10513

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Jul 29, 2025
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ESP32: Return correct deep sleep wakeup pin #10513

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12 changes: 11 additions & 1 deletion ports/espressif/common-hal/alarm/pin/PinAlarm.c
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Original file line number Diff line number Diff line change
Expand Up @@ -108,7 +108,17 @@ mp_obj_t alarm_pin_pinalarm_record_wake_alarm(void) {

#ifdef SOC_PM_SUPPORT_EXT0_WAKEUP
if (cause == ESP_SLEEP_WAKEUP_EXT0) {
pin_number = REG_GET_FIELD(RTC_IO_EXT_WAKEUP0_REG, RTC_IO_EXT_WAKEUP0_SEL);
int rtc_io_pin_number = REG_GET_FIELD(RTC_IO_EXT_WAKEUP0_REG, RTC_IO_EXT_WAKEUP0_SEL);
// Look up the GPIO equivalent pin for this RTC GPIO pin. On ESP32, the numbering
// is different for RTC_GPIO and regular GPIO, and there's no mapping table.
// The RTC and GPIO pin numbers match for all other current chips, so we could skip this
// for those chips, but it's not expensive, and maybe there will be another mismatch in the future.
for (gpio_num_t gpio_num = 0; gpio_num < SOC_GPIO_PIN_COUNT; gpio_num++) {
if (rtc_io_number_get(gpio_num) == rtc_io_pin_number) {
pin_number = gpio_num;
break;
}
}
} else {
#endif
#ifdef SOC_PM_SUPPORT_EXT1_WAKEUP
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