juzhenjianpan.rar_矩阵键盘

#include<reg52.h> #define uchar unsigned char #define uint unsigned int sbit P27=P2^7; sbit K5=P1^4; sbit fmq=P3^6; uchar num; unsigned char code s[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0x88,0x83,0xc6,0xa1,0x86,0x8e,0xbf}; void delay1ms(uint i) { uchar j; while(i--) { for(j=0;j<115;j++) //1ms基准延时程序 { ; } } } void delay500us() { unsigned char j; for(j=0;j<57;j++) //500us基准延时程序 { ; } } void beep() //产生1KHZ频率声音的函数 { fmq=0; delay500us(); fmq=1; delay500us(); } void beep1() { uchar i; for(i=0;i<20;i++) {beep();} } void main() { uchar temp; P27=0; P0=s[16]; while(1) { P1=0xff; //先向P1口写1；端口读状态(必须的） P1=0xf0; temp=P1; if(temp!=0xf0) { delay1ms(15); if(temp!=0xf0) { P1=0xfe; temp=P1; switch(temp) { case(0xee):P0=s[0];beep1();break; case(0xde):P0=s[1] ;beep1();break; case(0xbe):P0=s[2];beep1();break; case(0x7e):P0=s[3];beep1();break; } P1=0xfd; temp=P1; switch(temp) { case(0xed):P0=s[4];beep1();break; case(0xdd):P0=s[5] ;beep1();break; case(0xbd):P0=s[6];beep1();break; case(0x7d):P0=s[7];beep1();break; } P1=0xfb; temp=P1; switch(temp) { case(0xeb):P0=s[8];beep1();break; case(0xdb):P0=s[9] ;beep1();break; case(0xbb):P0=s[10];beep1();break; case(0x7b):P0=s[11];beep1();break; } P1=0xf7; temp=P1; switch(temp) { case(0xe7):P0=s[12];beep1();break; case(0xd7):P0=s[13] ;beep1();break; case(0xb7):P0=s[14];beep1();break; case(0x77):P0=s[15];beep1();break; } } } /* if(P1==0xee) { P0=s[0]; delay1ms(1000); } if(P1==0xde) P0=s[0]; if(P1==0xbe) P0=s[0]; if(P1==0x7e) P0=s[0]; if(P1==0xed) P0=s[0]; if(P1==0xdd) P0=s[0]; if(P1==0xbd) P0=s[0]; if(P1==0x7d) P0=s[0]; if(P1==0xeb) P0=s[0]; if(P1==0xdb) P0=s[0]; if(P1==0xbb) P0=s[0]; if(P1==0x7b) P0=s[0]; if(P1==0xe7) P0=s[0]; if(P1==0xd7) P0=s[0]; if(P1==0xb7) P0=s[0]; if(P1==0x77) P0=s[0]; */ } }