這是單片機共陽極矩陣鍵附件里有源程序代碼及原理圖
- #include<reg51.h>
- #define uchar unsigned char
- sbit L1=P1^0;
- 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};
- unsigned int time;
- delay(time)
- {
- 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;
- }
- }
- }
盤的仿真實驗
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