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#include<reg51.h> #define uchar unsigned char #define uint unsigned int delay(uint x) { uint a,b; for(a=x;a>0;a--) for(b=200;b>0;b--); } sbit P2_0=P2^0; sbit P2_1=P2^1; sbit P2_2=P2^2; sbit P2_3=P2^3; sbit P2_4=P2^4; sbit P2_5=P2^5; sbit P2_6=P2^6; sbit P2_7=P2^7; uint key(); uint key1[8]; uint key2[8]={1,2,3,4,5,6,7,8}; uint flag0,flag1,num; uchar temp; sbit P1_0=P1^0; sbit P1_7=P1^7; void display(uint a) { P2=0; switch(a) { case 0: P2_0=1;break; case 1: P2_1=1;break; case 2: P2_2=1;break; case 3: P2_3=1;break; case 4: P2_4=1;break; case 5: P2_5=1;break; case 6: P2_6=1;break; case 7: P2_7=1;break; } P0=0x80; } void main() { uint i; while(1) { i=0; P1_7=0; flag0=0; flag1=0; while(flag0==0) flag0=key(); while(flag0!=15) { key1[i]=flag0; display(i); flag0=key(); while(flag0==0) { flag0=key(); } i++; } for(i=0;i<8;i++) { if(key1[i]==key2[i]) flag1++; } if(flag1==8) { i=3; while(i--) { P1_0=0; P1_7=1; delay(200); P1_7=0; P1_0=1; delay(200); } } else { P1_0=0; P1_7=1; delay(2000); P1_0=1; P1_7=0; } } } uint key() { num=0; P3=0xfe; temp=P3; temp=temp&0xf0; if(temp!=0xf0) { delay(50); if(temp!=0xf0) { switch(temp) { case 0xe0: num=0; break; case 0xd0: num=1; break; case 0xb0: num=2; break; case 0x70: num=3; break; } } while(temp!=0xf0) { P3=0xfe; temp=P3; temp=temp&0xf0; } } P3=0xfd; temp=P3; temp=temp&0xf0; if(temp!=0xf0) { delay(50); if(temp!=0xf0) { switch(temp) { case 0xe0: num=4; break; case 0xd0: num=5; break; case 0xb0: num=6; break; case 0x70: num=7; break; } } while(temp!=0xf0) { P3=0xfd; temp=P3; temp=temp&0xf0; } } P3=0xfb; temp=P3; temp=temp&0xf0; if(temp!=0xf0) { delay(50); if(temp!=0xf0) { switch(temp) { case 0xe0: num=8; break; case 0xd0: num=9; break; case 0xb0: num=10; break; case 0x70: num=11; break; } } while(temp!=0xf0) { P3=0xfb; temp=P3; temp=temp&0xf0; } } P3=0xf7; temp=P3; temp=temp&0xf0; if(temp!=0xf0) { delay(50); if(temp!=0xf0) { switch(temp) { case 0xe0: num=12; break; case 0xd0: num=13; break; case 0xb0: num=14; break; case 0x70: num=15; break; } } while(temp!=0xf0) { P3=0xf7; temp=P3; temp=temp&0xf0; } } return(num); }