单片机矩形键盘检测程序.doc

#include#define ui unsigned int#define ch unsigned charsbit D1=P10;sbit deep=P23;sbit key=P34;sbit dula=P26;sbit wela=P27;ch code table=0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71;ch num,a,b,temp;void delay(ch);void init();void main()dula=0;P0=0;dula=1;wela=1;P0=0xc0; 让LED全亮wela=0;while(1)P3=0xfe;temp=P3;temp=temp&0xf0;while(temp!=0xf0)delay(5);temp=P3;temp=temp&0xf0; 防抖检测while(temp!=0xf0)temp=P3; 确实有键按下去，赋值 switch(temp) temp和case后面有一样的，则显示numcase 0xee: num=1;break;case 0xde: num=2;break;case 0xbe: num=3;break;case 0x7e: num=4;break; while(temp!=0xf0) 松手检测，松手后才变化,松手后temp=0xf0,则while为假，退出语句。开始显示temp=P3;temp=temp&0xf0; dula=1; P0=tablenum-1; 显示范围，紧跟在后面，不要放在程序外面 dula=0; P3=0xfd; 检测第二行temp=P3;temp=temp&0xf0;while(temp!=0xf0)delay(5);temp=P3;temp=temp&0xf0;while(temp!=0xf0)temp=P3; switch(temp)case 0xed: num=5;break;case 0xdd: num=6;break;case 0xbd: num=7;break;case 0x7d: num=8;break; while(temp!=0xf0)temp=P3;temp=temp&0xf0; dula=1; P0=tablenum-1; dula=0; P3=0xfb;temp=P3;temp=temp&0xf0;while(temp!=0xf0)delay(5);temp=P3;temp=temp&0xf0;while(temp!=0xf0)temp=P3; switch(temp)case 0xeb: num=9;break;case 0xdb: num=10;break;case 0xbb: num=11;break;case 0x7b: num=12;break; while(temp!=0xf0)temp=P3;temp=temp&0xf0; dula=1; P0=tablenum-1; dula=0; P3=0xf7;temp=P3;temp=temp&0xf0;while(temp!=0xf0)delay(5);temp=P3;temp=temp&0xf0;while(temp!=0xf0)temp=P3; switch(temp)case 0xe7: num=13;break;case 0xd7: num=14;break;case 0xb7: num=15;break;case 0x77: num=16;break; while(temp!=0xf0)temp=P3;temp=temp&0xf0; dula=1; P0=tablenum-1; dula=0; void