基于51单片机的密码锁.docVIP

#include#include#define uint unsigned int#define uchar unsigned charsbit led=P34;uchar flag,flag1,flag2,flag3,conflag;uchar code Tab =0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0x8e,0xff;void delay(uchar ms)/扫描法实现对矩阵键盘键值的扫描，右更为简单的线反转法 也可实现 uchar i;while(ms-)for(i=0;i250;i+)_nop_();_nop_();_nop_();_nop_();uchar keyscan()uchar temp,key;P1=0xfe;temp=P1;temp=temp&0xf0;if(temp!=0xf0)delay(10);temp=P1; temp=temp&0xf0;if(temp!=0xf0)temp=P1;switch(temp)case 0xee:key=1;break;case 0xde:key=2;break;case 0xbe:key=3;break;case 0x7e:key=4;break; while(temp!=0xf0) /等待按键松开 temp=P1;temp=temp&0xf0;P1=0xfd;temp=P1;temp=temp&0xf0;if(temp!=0xf0)delay(10);temp=P1; temp=temp&0xf0;if(temp!=0xf0)temp=P1;switch(temp)case 0xed:key=5;break;case 0xdd:key=6;break;case 0xbd:key=7;break;case 0x7d:key=8;break; while(temp!=0xf0) temp=P1;temp=temp&0xf0;P1=0xfb;temp=P1;temp=temp&0xf0;if(temp!=0xf0)delay(10);temp=P1; temp=temp&0xf0;if(temp!=0xf0)temp=P1;switch(temp)case 0xeb:key=9;break;case 0xdb:key=10;break;case 0xbb:key=11;break;case 0x7b:key=12;break; while(temp!=0xf0) temp=P1;temp=temp&0xf0;P1=0xf7;temp=P1;temp=temp&0xf0;if(temp!=0xf0)delay(10);temp=P1; temp=temp&0xf0;if(temp!=0xf0)temp=P1;switch(temp)case 0xe7:key=13;break;case 0xd7:key=14;break;case 0xb7:key=15;break;case 0x77:key=16;break; while(temp!=0xf0) temp=P1;temp=temp&0xf0;return key;void display(uchar m,uchar n,uchar x,uchar y)P0=Tabm;P2=0xfe;delay(1); /小于1ms才能产生人眼的视觉暂留P0=Tabn;P2=0xfd;delay(1);P0=Tabx;P2=0xfb;delay(1);P0=Taby;P2=0xf7;delay(1);void main()uchar temp,key_Value,key_Value1,key_Value2,key_Value3;while(1) temp=keyscan(); if(temp=1) key_Value=temp;display(key_Value,11,11,11);flag=1;if(flag=1)temp=keyscan();if(temp=2)key_Value1=temp;display(key_Value,key_Value1,11,11);flag1=1;if(flag1=1)temp=keyscan();if(temp=3) key_Value2=temp; display(key_Value,key_Value1,key_Value2,11); flag2=1;if(flag2=1)temp=keyscan();if(temp=4)key_Value3=temp;display(key_Value,key_Value1,key_Value2,