yinyue.zip_按键音乐

//----------------------------------------------------------------- // 名称: 按键控制定时器选播多段音乐 //----------------------------------------------------------------- // 说明: 本例内置三段音乐曲目,K1可启停音乐播放,K2用于选择音乐段. //----------------------------------------------------------------- #include <reg51.h> #include <intrins.h> #define INT8U unsigned char #define INT16U unsigned int //当前曲目索引,音符索引 INT8U Song_idx = 0, Tone_idx = 0; sbit SPK = P3^7; //蜂鸣器 sbit K1 = P1^0; //播放和停止键K1( 曲目选择键K2由INT0中断控制) //数码管段码表 INT8U code SEG_CODE[] = {0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x90}; //14个音符在TIMER0模式0下的定时/计数寄存器值初值表 INT8U code HI_LIST[] = { 0,226,229,232,234,236,238,240,241,243,244,245,246,247,248 }; INT8U code LO_LIST[] = { 0, 4, 12, 9, 20, 2, 8, 6, 2, 22, 5, 26, 1, 4, 2 }; //三段曲目音符(这些数据是任意编写的,读者可以自行修改) INT8U code Song[][50] = { {1,2,3,1,1,2,3,1,3,4,5,3,4,5,5,6,5,3,5,6,5,3,5,3,2,1,2,1,-1}, {3,3,3,4,5,5,5,5,6,5,3,5,3,2,1,5,6,5,3,3,2,1,1,-1}, {3,2,1,3,2,1,1,2,3,1,1,2,3,1,3,4,5,3,4,5,5,6,5,3,5,3,2,1,3,2,1,1,-1} }; //三段曲目节拍 INT8U code Len[][50] = { {1,1,1,1,1,1,1,1,1,1,2,1,1,2,1,1,1,1,1,1,1,1,1,1,1,2,1,2,-1}, {1,1,1,1,1,1,2,1,1,1,1,1,1,1,2,1,1,1,1,1,1,2,2,-1}, {1,1,2,1,1,2,1,1,1,1,1,1,1,1,1,1,2,1,1,2,1,1,1,1,1,1,1,2,1,1,2,2,-1} }; //----------------------------------------------------------------- // 延时子程序 //----------------------------------------------------------------- void delay_ms(INT16U ms) { INT8U i; while(ms--) for(i = 0; i < 120; i++); } //----------------------------------------------------------------- // 主程序 //----------------------------------------------------------------- void main() { } //----------------------------------------------------------------- // 外部中断0(K2) //----------------------------------------------------------------- void EX0_INT() interrupt 0 { } //----------------------------------------------------------------- // 定时器0中断函数 // SPK输出脉冲,并根据曲目索引及音符索引设置新的定时初值 //----------------------------------------------------------------- void T0_INT() interrupt 1 { }