esp32 按钮开关
时间: 2023-10-14 21:08:02 浏览: 219
要实现 ESP32 上的按钮开关,可以通过以下步骤:
1. 连接按钮:将按钮的一个引脚连接到 ESP32 的一个 GPIO 引脚上,另一个引脚连接到 ESP32 的 GND 引脚上。
2. 配置 GPIO 引脚:在代码中,使用 `gpio_config_t` 结构体配置 GPIO 引脚,设置为输入模式,并启用内部上拉电阻。
3. 读取按钮状态:使用 `gpio_get_level()` 函数读取 GPIO 引脚的电平状态,即可得到按钮的状态。
下面是一个示例代码:
```c
#include <stdio.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "driver/gpio.h"
#define BUTTON_GPIO GPIO_NUM_0
void button_task(void *arg)
{
gpio_config_t io_conf;
io_conf.intr_type = GPIO_INTR_DISABLE;
io_conf.mode = GPIO_MODE_INPUT;
io_conf.pin_bit_mask = (1ULL << BUTTON_GPIO);
io_conf.pull_down_en = GPIO_PULLDOWN_DISABLE;
io_conf.pull_up_en = GPIO_PULLUP_ENABLE;
gpio_config(&io_conf);
while (1) {
int button_state = gpio_get_level(BUTTON_GPIO);
printf("Button state: %d\n", button_state);
vTaskDelay(100 / portTICK_PERIOD_MS);
}
}
void app_main()
{
xTaskCreate(button_task, "button_task", 2048, NULL, 10, NULL);
}
```
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