dianziqin.rar_电子琴点阵

#include<reg51.h> #define uchar unsigned char sbit speaker=P2^0; sbit r_clk=P3^2; uchar keys; uchar tone[]={108,102,91,86,77,68,61,57}; uchar code tab2[8][5]={ {0x01,0x7e,0xff,0x7e,0xff}, {0x02,0xbd,0xff,0xbd,0xff}, {0x04,0xdb,0xff,0xdb,0xff}, {0x08,0xe7,0xff,0xe7,0xff}, {0x10,0xe7,0xff,0xe7,0xff}, {0x20,0xdb,0xff,0xdb,0xff}, {0x40,0xbd,0xff,0xbd,0xff}, {0x80,0x7e,0xff,0x7e,0xff}, }; void sound(uchar); void delay(uchar x) { unsigned char i,j; for(i=0;i<x;i++) for(j=0;j<1;j++); } void tab(uchar); void tab(uchar x) { uchar y; for(y=0;y<5;y++) SBUF=tab2[x][y]; TI=0; while(TI==0); r_clk=1; r_clk=0; } main() { SCON=0x00; P1=0xff; while(1) { keys=~P1; switch(keys) { case 0x01:sound(0);break; case 0x02:sound(1);break; case 0x04:sound(2);break; case 0x08:sound(3);break; case 0x10:sound(4);break; case 0x20:sound(5);break; case 0x40:sound(6);break; case 0x80:sound(7);break; } } } void sound(uchar x) { char i; for(i=0;i<60;i++) { tab(x); speaker=1; delay(tone[x]); speaker=0; delay(tone[x]); } }