刚开始接触89C51时写的矩阵键盘的源代码，适合新手参考
单片机源程序如下:
- #include<reg52.h>
- sbit we = P2^7;
- sbit du = P2^6;
- unsigned char code leddata[]={
-
- 0x3F, //"0"
- 0x06, //"1"
- 0x5B, //"2"
- 0x4F, //"3"
- 0x66, //"4"
- 0x6D, //"5"
- 0x7D, //"6"
- 0x07, //"7"
- 0x7F, //"8"
- 0x6F, //"9"
- 0x77, //"A"
- 0x7C, //"B"
- 0x39, //"C"
- 0x5E, //"D"
- 0x79, //"E"
- 0x71, //"F"
- 0x76, //"H"
- 0x38, //"L"
- 0x37, //"n"
- 0x3E, //"u"
- 0x73, //"P"
- 0x5C, //"o"
- 0x40, //"-"
- 0x00, //熄灭
- 0x00 //自定义
-
- };
- void delay(unsigned int c)
- {
- unsigned int a,b;
- for(a=c;a>0;a--)
- for(b=114;b>0;b--);
- }
- unsigned int keyscan()
- {
- unsigned int core_l,core_h;
- P3 = 0xf0;
-
- if((P3&0xf0)!=0xf0)
- { delay(5);
- if((P3&0xf0)!=0xf0)
- core_l = P3;
- P3 = core_l|0x0f;
- core_h = P3&0x0f;
- while((P3&0x0f)!=0x0f);
- }
-
- return core_h+core_l;
- }
- void keypro()
- {
- switch( keyscan() )
- {
- //第一行键值码
- case 0xee: P0 = leddata[0]; break;
- case 0xde: P0 = leddata[1]; break;
- case 0xbe: P0 = leddata[2]; break;
- case 0x7e: P0 = leddata[3]; break;
- //第二行键值码
- case 0xed: P0 = leddata[4]; break;
- case 0xdd: P0 = leddata[5]; break;
- case 0xbd: P0 = leddata[6]; break;
- case 0x7d: P0 = leddata[7]; break;
- //第三行键值码
- case 0xeb: P0 = leddata[8]; break;
- case 0xdb: P0 = leddata[9]; break;
- case 0xbb: P0 = leddata[10]; break;
- case 0x7b: P0 = leddata[11]; break;
- //第四行键值码
- case 0xe7: P0 = leddata[12]; break;
- case 0xd7: P0 = leddata[13]; break;
- case 0xb7: P0 = leddata[14]; break;
- case 0x77: P0 = leddata[15]; break;
- }
- }
- void main()
- ……………………
- …………限于本文篇幅 余下代码请从51黑下载附件…………
所有资料51hei提供下载:
矩阵键盘.zip
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