基于树莓派的智能音响【报时】【放歌】【切歌】【开关灯】

#include <wiringSerial.h>
#include <wiringPi.h>
#include <stdio.h>
#include <error.h>
#include <string.h>
#include <unistd.h>
#include <sys/time.h>
#include <stdlib.h>
#include <sys/types.h>
#include <fcntl.h>
#define SWITCHER7 7
#define SWITCHER3 3
#define MUSICSTOP1 11
#define MUSICSTOP2 13
int system(const char *string);
char* cmd_system(const char* command);
char* cmd_system(const char* command)//用于在代码中执行SHELL命令
{
    char* result ="";
    FILE *fpRead;
    fpRead = popen(command,"r");
    char buf[1024];
    memset(buf,'\0',sizeof(buf));
    while(fgets(buf,1024-1,fpRead)!=NULL)
    {
        result = buf;
    }
    if(fpRead!=NULL)
            pclose(fpRead);
    return result;
}
int main()
{
      char cmd[128]={'\0'};
        int fd;
      char buf[128];
        int nread;
        int flags;
        int serial_cmd_type = 0;
        int time_cnt = 0;
        char report[256] = {0};
        char hour_eg[2];
        char min_eg[2];
        char* result;
        wiringPiSetup();
        pinMode(SWITCHER3,OUTPUT);
        pinMode(SWITCHER7,OUTPUT);
        digitalWrite(SWITCHER3,HIGH);
        digitalWrite(SWITCHER7,HIGH);
        memset(buf,'\0',sizeof(buf));
        if(wiringPiSetup() == -1)
        {
        }
        fd = serialOpen("/dev/ttyAMA0",9600);
        if(flags = fcntl(fd, F_GETFL, 0) < 0)//用于串口一直在执行接收数据，而不是阻塞中
        {
                perror("fcntl");
                return -1;
        }
        flags |= O_NONBLOCK;
        if(fcntl(fd, F_SETFL, flags) < 0)
        {
                perror("fcntl");
                return -1;
        }
        while(1)
        {
                nread = read (fd, cmd, sizeof(cmd));//不断的去读取串口接收到的数据
                //if(strlen(cmd)==0)
                //{
                //      printf("chaoShi\n");
                //}
                //printf("nread:%d\n",nread);
                if(strstr(cmd,"kaideng")!=NULL)//当串口接收到到kaideng字符串，就开灯了
                {
                        printf("kaideng\n");
                        digitalWrite(SWITCHER3,LOW);
                        //serial_cmd_type = 1;
                        //time_cnt = 0;
                }
                if(strstr(cmd,"guandeng")!=NULL)//当串口接收到到guandeng字符串，就开灯了
                {
                        printf("guandeng\n");
                        digitalWrite(SWITCHER3,HIGH);
                        //serial_cmd_type = 1;
                        //time_cnt = 0;
                }
                if(strstr(cmd,"fangge")!=NULL)//当串口接收到到fangge字符串，就开灯了
                {
                        printf("fangge\n");
                        system("killall mpg321  1>/dev/null 2>&1");//首先杀死音乐播放当前播放的歌曲的进程
                        system("mpg321 /home/pi/Mylinux/dream.mp3 &");//在后台进行播放歌曲
                        serial_cmd_type = 2;
                        time_cnt = 0;
                } if(strstr(cmd,"baoshi")!=NULL)//串口收到baoshi字符串，进行报时
                {
                        system("killall mpg321  1>/dev/null 2>&1");//杀死放歌的进程
                        system("killall espeak  1>/dev/null 2>&1");//杀死报时的进程
                        printf("baoshi\n");
                        result = cmd_system("date +'%H%M'");//进行读取时间
                        strncpy(hour_eg,result,2);
                        strncpy(min_eg,result+2,2);
                        hour_eg[2]='\0';
                        min_eg[2]='\0';
                        sprintf(report,"espeak -v zh \"现在时间%s点%s分\"",hour_eg,min_eg);
                        printf("time:s%",report);
                        digitalWrite(SWITCHER7,LOW);//报时的时候打开指示灯
                        system(report);//进行报时
                        digitalWrite(SWITCHER7,HIGH);//报完关闭指示灯
                        serial_cmd_type = 3;
                        time_cnt = 0;
                } 
                if(strstr(cmd,"huange")!=NULL)//换一首歌曲播放
                {
                        printf("huange\n");
                        system("killall mpg321  1>/dev/null 2>&1");
                        system("mpg321 /home/pi/Mylinux/xiao.mp3 &");
                        serial_cmd_type = 4;
                        time_cnt = 0;
                }
                memset(cmd,'\0',sizeof(cmd)/sizeof(char));
        }
        switch (serial_cmd_type)
        {
                case 1:
                        printf("case1\n");
                        break;
                case 2://放歌的时候进行指示灯的闪烁
                        printf("case2\n");
                        time_cnt++;
                        printf("time_cnt2:%d\n",time_cnt);
                        if(time_cnt < MUSICSTOP1)
                        {
                                printf("LOW\n");
                                digitalWrite(SWITCHER7,LOW);
                                delay(1000);
                        }
                        break;
                case 3:
                        printf("case3\n");
                        digitalWrite(SWITCHER7,HIGH);
                        break;
                case 4://放歌的时候进行指示灯的闪烁
                        printf("case4\n");
                        time_cnt++;
                        printf("time_cnt4:%d\n",time_cnt);
                        if(time_cnt < MUSICSTOP2)
                        {
                                printf("LOW\n");
                                digitalWrite(SWITCHER7,LOW);
                                delay(1000);
                        }
                        break;
                default:
                        printf("case5\n");
                        break;
        }
        if(serial_cmd_type == 2||serial_cmd_type == 4)//放歌的时候进行指示灯的闪烁
        {
                printf("HIGH\n");
                digitalWrite(SWITCHER7,HIGH);
        }
        delay(1000);
        close(fd);
        return 0;
}