单片机按键控制蜂鸣器发声程序.doc

1、#includetypedef unsigned char uint8;typedef unsigned int uint16;uint8 Count,i;sbit Speak =P12; /蜂鸣器器控制脚 sbit key1 =P32;/按键控制引脚sbit key2 =P33;sbit key3 =P34;/*以下数组是音符编码*/uint8 code SONG = 0xff,0x39,0x30,0x33,0x30,0xff,0x30,0x30,0x00,;void Time0_Init()/定时器 T0 方式 1，定时 10msTMOD = 0x01;IE = 0x82;TH0 = 0x

2、DC;TL0 = 0x00;void Time0_Int() interrupt 1TH0 = 0xDC;TL0 = 0x00;Count+;void delay (uint8 k)/按键防抖延时uint8 j;while(k-)!=0)for(j=0;j125;j+);void Delay_xMs(uint8 x)/发声延时uint8 i,j;for(i=0; ix; i+)for(j=0; j3; j+); void Play_Song(uint8 i)/蜂鸣器发声函数uint8 Temp1,Temp2;uint8 Addr;Count = 0; /中断计数器清 0Addr = i *3;

3、while(1)Temp1 = SONGAddr+;if (Temp1 = 0xFF) /休止符TR0 = 0;Delay_xMs(100);else if (Temp1 = 0x00) /歌曲结束符return;elseTemp2 = SONGAddr+;TR0 = 1;while(1)Speak = Speak;Delay_xMs(Temp1);if(Temp2 = Count)Count = 0;break;void keyscan (void)/按键切换声音函数 if(key1=0) delay(10);if(key1=0)i=0;if(key2=0) delay(10);if(key2=0)i=1;if(key3=0) delay(10);if(key3=0)i=2;void Main()Time0_Init();/定时器 0 中断初始化while(1)keyscan ();Play_Song(i);