串口通信 PC機向單片機發(fā)送命令啟動或停止蜂鳴器播放音樂

ID:396671 · 發(fā)表于 2018-11-6 21:14

PC機向單片機發(fā)送命令啟動或停止蜂鳴器播放音樂，
當播放音樂時該怎么停止，這時是播放函數運行中，pc輸入數據要等到放完才接受，也就是停不下來
是不是應該換個播放函數？該怎么寫？

#include<reg52.h>
#include<string.h>

unsigned char Count;
sbit speak = P3^4;
unsigned char code SONG[] ={    //祝你平安
0x26,0x20,0x20,0x20,0x20,0x20,0x26,0x10,0x20,0x10,0x20,0x80,0x26,0x20,0x30,0x20,
0x30,0x20,0x39,0x10,0x30,0x10,0x30,0x80,0x26,0x20,0x20,0x20,0x20,0x20,0x1c,0x20,
0x20,0x80,0x2b,0x20,0x26,0x20,0x20,0x20,0x2b,0x10,0x26,0x10,0x2b,0x80,0x26,0x20,
0x30,0x20,0x30,0x20,0x39,0x10,0x26,0x10,0x26,0x60,0x40,0x10,0x39,0x10,0x26,0x20,
0x30,0x20,0x30,0x20,0x39,0x10,0x26,0x10,0x26,0x80,0x26,0x20,0x2b,0x10,0x2b,0x10,
0x2b,0x20,0x30,0x10,0x39,0x10,0x26,0x10,0x2b,0x10,0x2b,0x20,0x2b,0x40,0x40,0x20,
0x20,0x10,0x20,0x10,0x2b,0x10,0x26,0x30,0x30,0x80,0x18,0x20,0x18,0x20,0x26,0x20,
0x20,0x20,0x20,0x40,0x26,0x20,0x2b,0x20,0x30,0x20,0x30,0x20,0x1c,0x20,0x20,0x20,
0x20,0x80,0x1c,0x20,0x1c,0x20,0x1c,0x20,0x30,0x20,0x30,0x60,0x39,0x10,0x30,0x10,
0x20,0x20,0x2b,0x10,0x26,0x10,0x2b,0x10,0x26,0x10,0x26,0x10,0x2b,0x10,0x2b,0x80,
0x18,0x20,0x18,0x20,0x26,0x20,0x20,0x20,0x20,0x60,0x26,0x10,0x2b,0x20,0x30,0x20,
0x30,0x20,0x1c,0x20,0x20,0x20,0x20,0x80,0x26,0x20,0x30,0x10,0x30,0x10,0x30,0x20,
0x39,0x20,0x26,0x10,0x2b,0x10,0x2b,0x20,0x2b,0x40,0x40,0x10,0x40,0x10,0x20,0x10,
0x20,0x10,0x2b,0x10,0x26,0x30,0x30,0x80,0x00};

void Delay_xMs(unsigned int x)
{
unsigned int i,j;
for( i =0;i < x;i++ )
{
      for( j =0;j<3;j++ );
}
}

void Play_Song(unsigned char i)
{
unsigned char Temp1,Temp2;
unsigned int Addr;
Count = 0;    //中斷計數器清0
Addr = i * 217;
while(1)
{
  Temp1 = SONG[Addr++];
   if ( Temp1 == 0xFF )       //休止符
   {
   TR0 = 0;
   Delay_xMs(100);
   }
   else if ( Temp1 == 0x00 ) //歌曲結束符
   {
   return;
   }
   else
   {
   Temp2 = SONG[Addr++];
   TR0 = 1;
   while(1)
   {
   speak = ~speak;
   Delay_xMs(Temp1);
   if ( Temp2 == Count )
   {
      Count = 0;
      break;
   }
   }
   }
}
}

void main (void)
{ char a,b=0;
  SCON=0x50;//串行口方式1
  PCON=0x00;//T1初始化,
  TMOD=0x21;//T1設為方式2  T0設為方式1
  TH1=0xFD;//選9600波特,fosc=11.0592MHz
  TR1=1;//啟動T1
  IE = 0x82;
  TH0  = 0xD8;
  TL0  = 0xEF;


  while(1)
{
   if(RI)//如果接收到數據,就把接收到的數回發(fā)給PC
      { RI=0;//清接收標志
         a=SBUF ;//讀串行口數據
         SBUF=a;//把從PC機發(fā)送過來的數據返回給PC機
         while(!TI);//沒有發(fā)送完等待
         TI=0;//清發(fā)送完中斷標志

   switch(a)
         {
            case 0x00 : P0=0xff; break;
            case 0x01 : P0=0xAA; break;
            case 0x02 : P0=0x00; break;
         case 0x03 : Play_Song(0);break;  //播放
         case 0x04 : P0=0xff;
         TR0 = 1;speak=0;
         break;
         }
   }
  }
}

void Time0_Int() interrupt 1
{
TH0 = 0xD8;
TL0 = 0xEF;
Count++; //長度加1

}

帳號		自動登錄	找回密碼
密碼			立即注冊