三个结合在一起，使用c语言

好的，以下是一个基于C语言的示例代码，结合了手动模式和自动模式的功能，可以通过电脑键盘输入控制三色灯，也可以循环进行AD采样，根据采样结果控制蜂鸣器、三色灯和继电器实现超限报警：

#include <stdio.h>
#include <stdlib.h>
#include <wiringPi.h>

#define RED_PIN 0
#define GREEN_PIN 1
#define BLUE_PIN 2
#define ADC_PIN 3
#define BUZZER_PIN 4
#define RELAY_PIN 5

int main(void)
{
    wiringPiSetup();

    pinMode(RED_PIN, OUTPUT);
    pinMode(GREEN_PIN, OUTPUT);
    pinMode(BLUE_PIN, OUTPUT);
    pinMode(ADC_PIN, INPUT);
    pinMode(BUZZER_PIN, OUTPUT);
    pinMode(RELAY_PIN, OUTPUT);

    int adc_value;
    char command[10];

    while (1) {
        printf("Enter command (red, green, blue, off, auto): ");
        scanf("%s", command);

        if (strcmp(command, "red") == 0) {
            digitalWrite(RED_PIN, HIGH);
            digitalWrite(GREEN_PIN, LOW);
            digitalWrite(BLUE_PIN, LOW);
        } else if (strcmp(command, "green") == 0) {
            digitalWrite(RED_PIN, LOW);
            digitalWrite(GREEN_PIN, HIGH);
            digitalWrite(BLUE_PIN, LOW);
        } else if (strcmp(command, "blue") == 0) {
            digitalWrite(RED_PIN, LOW);
            digitalWrite(GREEN_PIN, LOW);
            digitalWrite(BLUE_PIN, HIGH);
        } else if (strcmp(command, "off") == 0) {
            digitalWrite(RED_PIN, LOW);
            digitalWrite(GREEN_PIN, LOW);
            digitalWrite(BLUE_PIN, LOW);
        } else if (strcmp(command, "auto") == 0) {
            while (1) {
                adc_value = digitalRead(ADC_PIN);
                if (adc_value > 1000) {
                    digitalWrite(RED_PIN, HIGH);
                    digitalWrite(GREEN_PIN, LOW);
                    digitalWrite(BLUE_PIN, LOW);
                    digitalWrite(BUZZER_PIN, HIGH);
                    digitalWrite(RELAY_PIN, HIGH);
                    delay(1000);
                    digitalWrite(BUZZER_PIN, LOW);
                    digitalWrite(RELAY_PIN, LOW);
                } else {
                    digitalWrite(RED_PIN, LOW);
                    digitalWrite(GREEN_PIN, LOW);
                    digitalWrite(BLUE_PIN, LOW);
                    digitalWrite(BUZZER_PIN, LOW);
                    digitalWrite(RELAY_PIN, LOW);
                }
            }
        } else {
            printf("Invalid command\n");
        }
    }

    return 0;
}

以上代码使用了WiringPi库来控制树莓派的GPIO引脚。程序会循环读取用户从键盘输入的命令，根据命令控制三色灯的亮灭，或者进入自动模式循环采样ADC值，根据采样结果控制灯光、蜂鸣器和继电器的开关。