【esp32-s3】4.按键key

1 前言

尝试使用按键控制led灯亮灭。

2 硬件

led

key

按键0

3 代码

/* Hello World ExampleThis example code is in the Public Domain (or CC0 licensed, at your option.)Unless required by applicable law or agreed to in writing, thissoftware is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES ORCONDITIONS OF ANY KIND, either express or implied. */
#include <stdio.h>
#include "sdkconfig.h"
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "esp_system.h"
#include "esp_spi_flash.h"
#include "driver/gpio.h"#define GPIO_LED4 38 //指定IO口
#define GPIO_LED5 39 //指定IO口#define GPIO_KEY1 0void init_key(void)
{
    gpio_pad_select_gpio(GPIO_KEY1);	//指定IO口gpio_set_direction(GPIO_KEY1,GPIO_MODE_INPUT);
}int get_key_value(void)
{
    int a = gpio_get_level(GPIO_KEY1);printf("key1 gpio07 value:%d\n",a);return a;
}void init_led(void)
{
    gpio_pad_select_gpio(GPIO_LED4);	//指定IO口gpio_set_direction(GPIO_LED4,GPIO_MODE_OUTPUT);gpio_pad_select_gpio(GPIO_LED5);	//指定IO口gpio_set_direction(GPIO_LED5,GPIO_MODE_OUTPUT);gpio_set_level(GPIO_LED4, 0);gpio_set_level(GPIO_LED5, 0);
}void hello_world()
{
    printf("Hello world!\n");/* Print chip information */esp_chip_info_t chip_info;esp_chip_info(&chip_info);printf("This is %s chip with %d CPU core(s), WiFi%s%s, ",CONFIG_IDF_TARGET,chip_info.cores,(chip_info.features & CHIP_FEATURE_BT) ? "/BT" : "",(chip_info.features & CHIP_FEATURE_BLE) ? "/BLE" : "");printf("silicon revision %d, ", chip_info.revision);printf("%dMB %s flash\n", spi_flash_get_chip_size() / (1024 * 1024),(chip_info.features & CHIP_FEATURE_EMB_FLASH) ? "embedded" : "external");printf("Minimum free heap size: %d bytes\n", esp_get_minimum_free_heap_size());for (int i = 10; i >= 0; i--) {
    printf("Restarting in %d seconds...\n", i);vTaskDelay(1000 / portTICK_PERIOD_MS);}printf("Restarting now.\n");fflush(stdout);esp_restart();}void test_led()
{
    printf("Turning off the LED\n");gpio_set_level(GPIO_LED4, 0);	//低电平输出gpio_set_level(GPIO_LED5, 1);vTaskDelay(1000 / portTICK_PERIOD_MS);	//延时1sprintf("Turning on the LED\n");gpio_set_level(GPIO_LED4, 1);	//高电平输出gpio_set_level(GPIO_LED5, 0);vTaskDelay(1000 / portTICK_PERIOD_MS);
}void app_main(void)
{
    init_led();init_key();int temp = 0;int status_led =0;while(1) {
        // test_led()temp = get_key_value();if (temp == 0){
    printf("temp is 0\n");gpio_set_level(GPIO_LED4, status_led);status_led = 1 - status_led;// vTaskDelay(1000 / portTICK_PERIOD_MS);}else{
    printf("temp is 1\n");// gpio_set_level(GPIO_LED4, 1);// vTaskDelay(1000 / portTICK_PERIOD_MS);}// 延时vTaskDelay(1000 / portTICK_PERIOD_MS);}
}

4 结果

按下按键key0，白灯点亮，再次按下则白灯熄灭。