用c语言switch算法写一个esp32的三轮寻迹代码

好的，以下是一个基本的三轮寻迹代码，使用了switch语句：

#include <stdio.h>
#include <stdlib.h>
#include "esp_system.h"
#include "esp_event.h"
#include "esp_log.h"
#include "esp_wifi.h"
#include "esp_netif.h"
#include "nvs_flash.h"
#include "driver/gpio.h"

#define LEFT_SENSOR_GPIO  4
#define MIDDLE_SENSOR_GPIO  5
#define RIGHT_SENSOR_GPIO  6

void app_main(void)
{
    // 初始化GPIO
    gpio_config_t io_conf;
    io_conf.intr_type = GPIO_INTR_DISABLE;
    io_conf.mode = GPIO_MODE_INPUT;
    io_conf.pin_bit_mask = (1ULL<<LEFT_SENSOR_GPIO) | (1ULL<<MIDDLE_SENSOR_GPIO) | (1ULL<<RIGHT_SENSOR_GPIO);
    io_conf.pull_down_en = 0;
    io_conf.pull_up_en = 1;
    gpio_config(&io_conf);

    while(1)
    {
        uint8_t left_sensor = gpio_get_level(LEFT_SENSOR_GPIO);
        uint8_t middle_sensor = gpio_get_level(MIDDLE_SENSOR_GPIO);
        uint8_t right_sensor = gpio_get_level(RIGHT_SENSOR_GPIO);

        switch((left_sensor << 2) | (middle_sensor << 1) | right_sensor)
        {
            case 0b000: // all sensors detect black line
                // stop
                break;
            case 0b001: // only right sensor detect black line
                // turn left
                break;
            case 0b010: // only middle sensor detect black line
                // go straight
                break;
            case 0b011: // right and middle sensors detect black line
                // turn left
                break;
            case 0b100: // only left sensor detect black line
                // turn right
                break;
            case 0b101: // left and right sensors detect black line
                // stop
                break;
            case 0b110: // left and middle sensors detect black line
                // turn right
                break;
            case 0b111: // all sensors detect white ground
                // go straight
                break;
            default:
                // error
                break;
        }
    }
}

这段代码实现了基本的三轮寻迹功能，根据传感器检测到的黑线情况，通过switch语句进行相应的动作。其中，左、中、右传感器检测到黑线的情况分别用1表示，未检测到黑线的情况用0表示。根据这些二进制位的情况，通过switch语句进行判断，并执行相应的动作。