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wake up on button press

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liquidraver
2026-03-16 14:17:18 +01:00
parent 71684af590
commit feeeabefd0
2 changed files with 58 additions and 8 deletions
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zephcore/boards/common/nrf52_wakeup.dtsi
+13 -6
View File
@@ -1,11 +1,18 @@
/*
* Common: configure the 'buttons' gpio-keys node as a wakeup source.
* Common: mark the 'buttons' gpio-keys node as a wakeup source.
*
* On nRF52840, sys_poweroff() enters System OFF (~1µA). Waking via the user
* button requires GPIO SENSE bits to be set before poweroff. Zephyr's gpio-keys
* driver adds GPIO_INT_WAKEUP to the interrupt flags when wakeup-source is set,
* which causes the nRF52 GPIO driver to call nrf_gpio_cfg_sense_set(). Those
* SENSE bits persist through System OFF and trigger a reset on button press.
* NOTE: On nRF52, this property is currently inert — the nRF GPIO driver
* does not implement GPIO_INT_WAKEUP, so wakeup-source alone does not set
* the GPIO SENSE bits required for System OFF wakeup. Actual SENSE
* configuration is done explicitly in action_deep_sleep() (ui_task.c)
* via nrf_gpio_cfg_sense_input() right before sys_poweroff().
*
* Kept here so that:
* 1. If a future Zephyr nRF GPIO driver gains GPIO_INT_WAKEUP support,
* this will work automatically alongside the HAL call (harmless
* double-set).
* 2. It documents wakeup intent in devicetree for boards that may run
* on other platforms where the driver does honour GPIO_INT_WAKEUP.
*
* Include this in any nRF52 board DTS that defines a 'buttons' gpio-keys node.
* Boards without buttons (e.g. ikoka_nano, rak4631) should NOT include this.
zephcore/helpers/ui/ui_task.c
+45 -2
View File
@@ -48,6 +48,10 @@
#include <zephyr/sys/poweroff.h>
#endif
#if defined(CONFIG_SOC_FAMILY_NORDIC_NRF)
#include <hal/nrf_gpio.h>
#endif
#include <zephyr/sys/reboot.h>
/* GPS control (extern "C" in ZephyrSensorManager.h) */
@@ -577,8 +581,47 @@ static void action_deep_sleep(void)
gps_power_off_for_shutdown();
mesh_disable_power_regulators();
/* 5. Enter System OFF.
* Wake via reset button → full chip reset → clean boot. */
/* 5. Configure GPIO SENSE for button wakeup, then enter System OFF.
*
* The nRF GPIO driver does not implement GPIO_INT_WAKEUP, so the
* wakeup-source DTS property has no effect on nRF52. We must set
* SENSE bits directly via the nRF HAL. sys_poweroff() goes straight
* to nrf_power_system_off() with no device PM suspend, so these bits
* persist into System OFF and trigger a reset on next button press.
*
* Wait for button release first: if we enter System OFF while the
* button is still held (long-press shutdown), DETECT is already
* asserted and the chip cannot enter System OFF cleanly. */
#if defined(CONFIG_SOC_FAMILY_NORDIC_NRF) && DT_NODE_EXISTS(DT_ALIAS(sw0))
{
#define _SW0_NODE DT_ALIAS(sw0)
#define _SW0_PORT DT_PROP(DT_GPIO_CTLR(_SW0_NODE, gpios), port)
#define _SW0_PIN DT_GPIO_PIN(_SW0_NODE, gpios)
#define _SW0_FLAGS DT_GPIO_FLAGS(_SW0_NODE, gpios)
static const struct gpio_dt_spec sw0 =
GPIO_DT_SPEC_GET(DT_ALIAS(sw0), gpios);
gpio_pin_configure_dt(&sw0, GPIO_INPUT);
int64_t deadline = k_uptime_get() + 5000;
while (gpio_pin_get_dt(&sw0) && k_uptime_get() < deadline) {
k_sleep(K_MSEC(10));
}
nrf_gpio_cfg_sense_input(
NRF_GPIO_PIN_MAP(_SW0_PORT, _SW0_PIN),
(_SW0_FLAGS & GPIO_PULL_UP) ? NRF_GPIO_PIN_PULLUP :
(_SW0_FLAGS & GPIO_PULL_DOWN) ? NRF_GPIO_PIN_PULLDOWN :
NRF_GPIO_PIN_NOPULL,
(_SW0_FLAGS & GPIO_ACTIVE_LOW) ? NRF_GPIO_PIN_SENSE_LOW
: NRF_GPIO_PIN_SENSE_HIGH);
#undef _SW0_NODE
#undef _SW0_PORT
#undef _SW0_PIN
#undef _SW0_FLAGS
}
#endif /* CONFIG_SOC_FAMILY_NORDIC_NRF && sw0 */
LOG_INF("deep sleep: entering System OFF");
sys_poweroff();
CODE_UNREACHABLE;