1 /* 2 * Copyright (c) 2024 STMicroelectronics 3 * 4 * SPDX-License-Identifier: Apache-2.0 5 */ 6 7 #include <zephyr/kernel.h> 8 #include <zephyr/device.h> 9 #include <zephyr/devicetree.h> 10 #include <zephyr/drivers/gpio.h> 11 #include <zephyr/sys/printk.h> 12 #include <zephyr/sys/poweroff.h> 13 #include <zephyr/dt-bindings/gpio/stm32-gpio.h> 14 15 #define WAIT_TIME_US 4000000 16 17 #define WKUP_SRC_NODE DT_ALIAS(wkup_src) 18 #if !DT_NODE_HAS_STATUS_OKAY(WKUP_SRC_NODE) 19 #error "Unsupported board: wkup_src devicetree alias is not defined" 20 #endif 21 22 static const struct gpio_dt_spec button = GPIO_DT_SPEC_GET(WKUP_SRC_NODE, gpios); 23 24 static const struct gpio_dt_spec led = GPIO_DT_SPEC_GET(DT_ALIAS(led0), gpios); 25 main(void)26int main(void) 27 { 28 printk("\nWake-up button is connected to %s pin %d\n", button.port->name, button.pin); 29 30 __ASSERT_NO_MSG(gpio_is_ready_dt(&led)); 31 gpio_pin_configure_dt(&led, GPIO_OUTPUT_ACTIVE); 32 gpio_pin_set(led.port, led.pin, 1); 33 34 /* Setup button GPIO pin as a source for exiting Poweroff */ 35 gpio_pin_configure_dt(&button, STM32_GPIO_WKUP); 36 37 printk("Will wait %ds before powering the system off\n", (WAIT_TIME_US / 1000000)); 38 k_busy_wait(WAIT_TIME_US); 39 40 printk("Powering off\n"); 41 printk("Press the user button to power the system on\n\n"); 42 43 sys_poweroff(); 44 /* Will remain powered off until wake-up or reset button is pressed */ 45 46 return 0; 47 } 48
