esp-idf/examples/system/light_sleep/main/gpio_wakeup.c
2022-01-25 17:43:02 +08:00

59 lines
1.8 KiB
C

/*
* SPDX-FileCopyrightText: 2021-2022 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Unlicense OR CC0-1.0
*/
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "esp_check.h"
#include "esp_sleep.h"
#include "driver/gpio.h"
/* Most development boards have "boot" button attached to GPIO0.
* You can also change this to another pin.
*/
#if CONFIG_IDF_TARGET_ESP32C3 || CONFIG_IDF_TARGET_ESP32C2 || CONFIG_IDF_TARGET_ESP32H2
#define BOOT_BUTTON_NUM 9
#else
#define BOOT_BUTTON_NUM 0
#endif
/* Use boot button as gpio input */
#define GPIO_WAKEUP_NUM BOOT_BUTTON_NUM
/* "Boot" button is active low */
#define GPIO_WAKEUP_LEVEL 0
static const char *TAG = "gpio_wakeup";
void example_wait_gpio_inactive(void)
{
printf("Waiting for GPIO%d to go high...\n", GPIO_WAKEUP_NUM);
while (gpio_get_level(GPIO_WAKEUP_NUM) == GPIO_WAKEUP_LEVEL) {
vTaskDelay(pdMS_TO_TICKS(10));
}
}
esp_err_t example_register_gpio_wakeup(void)
{
/* Initialize GPIO */
gpio_config_t config = {
.pin_bit_mask = BIT64(GPIO_WAKEUP_NUM),
.mode = GPIO_MODE_INPUT,
.pull_down_en = false,
.pull_up_en = false,
.intr_type = GPIO_INTR_DISABLE
};
ESP_RETURN_ON_ERROR(gpio_config(&config), TAG, "Initialize GPIO%d failed", GPIO_WAKEUP_NUM);
/* Enable wake up from GPIO */
ESP_RETURN_ON_ERROR(gpio_wakeup_enable(GPIO_WAKEUP_NUM, GPIO_WAKEUP_LEVEL == 0 ? GPIO_INTR_LOW_LEVEL : GPIO_INTR_HIGH_LEVEL),
TAG, "Enable gpio wakeup failed");
ESP_RETURN_ON_ERROR(esp_sleep_enable_gpio_wakeup(), TAG, "Configure gpio as wakeup source failed");
/* Make sure the GPIO is inactive and it won't trigger wakeup immediately */
example_wait_gpio_inactive();
ESP_LOGI(TAG, "gpio wakeup source is ready");
return ESP_OK;
}