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variants: XIAO NRF52: Support power-off via user button

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Add the necessary code to properly power-off the Xiao + Wio
companions. This way we can achieve around 15 microamps of power
consumption in the off state.

Signed-off-by: Frieder Schrempf <frieder@fris.de>
This commit is contained in:
Frieder Schrempf
2025-11-19 17:26:15 +01:00
parent c76d337a00
commit 4a8dcb4906
1 changed files with 18 additions and 0 deletions
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18
variants/xiao_nrf52/XiaoNrf52Board.h
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@@ -46,6 +46,24 @@ public:
NVIC_SystemReset();
}
void powerOff() override {
// set led on and wait for button release before poweroff
digitalWrite(PIN_LED, LOW);
#ifdef PIN_USER_BTN
while(digitalRead(PIN_USER_BTN) == LOW);
#endif
digitalWrite(LED_GREEN, HIGH);
digitalWrite(LED_BLUE, HIGH);
digitalWrite(PIN_LED, HIGH);
#ifdef PIN_USER_BTN
// configure button press to wake up when in powered off state
nrf_gpio_cfg_sense_input(digitalPinToInterrupt(g_ADigitalPinMap[PIN_USER_BTN]), NRF_GPIO_PIN_NOPULL, NRF_GPIO_PIN_SENSE_LOW);
#endif
sd_power_system_off();
}
bool startOTAUpdate(const char* id, char reply[]) override;
};