- #include <reg51.h>
- #define uchar unsigned char
- sbit L1=P1^0; //定義鍵盤的四列線
- sbit L2=P1^1;
- sbit L3=P1^2;
- sbit L4=P1^3;
- uchar dis[16]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0x88,0x83,0xc6,0xa1,0x86,0x8e}; //共陽極數碼管字符0~F對應段碼
- unsigned int time;
- delay(time) //延時子程序
- {unsigned int j;
- for(j=0;j<time;j++)
- {}
- }
- main()
- {
- uchar temp;
- uchar k,i;
- while(1)
- {
- P1=0xef;
- for(i=0;i<=3;i++)
- {
- if (L1==0) P0=dis [i*4+0];
- if (L2==0) P0=dis [i*4+1];
- if (L3==0) P0=dis [i*4+2];
- if (L4==0) P0=dis [i*4+3];
- delay(500);
- temp=P1;
- temp=temp|0x0f;
- temp=temp<<1;
- temp=temp|0x0f;
- P1=temp;
- }
- }
- }
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