单片机源程序如下:
- #include <reg52.h>
- #include <intrins.h>
- #define uchar unsigned char
- #define uint unsigned int
- uchar code DSY_CODE[]=
- {
- 0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0x88,0x83,0xc6,0xa1,0x86,0x8e,0x00
- };
- uchar code KeyCodeTable[]=
- {
- 0x11,0x12,0x14,0x18,0x21,0x22,0x24,0x28,0x41,0x42,0x44,0x48,0x81,0x82,0x84,0x88
- };
- void Delay()
- {
- uchar i;
- for(i=0;i<200;i++);
- }
- uchar Keys_Scan()
- {
- uchar sCode,kCode,i,k;
- P1 = 0xf0;
- if((P1&0xf0)!=0xf0)
- {
- Delay();
- if((P1&0xf0)!=0xf0)
- {
- sCode = 0xfe;
- for(k=0;k<4;k++)
- {
- P1 = sCode;
- if((P1&0xf0)!=0xf0)
- {
- kCode = ~P1;
- for(i=0;i<16;i++)
- {
- if(kCode == KeyCodeTable[i])
- return i;
- }
- }
- else
- sCode = _crol_(sCode,1);
- }
- }
- }
- return -1;
- }
- void main()
- {
- uchar KeyNO = -1;
- uchar i,P2_LED,P3_LED;
- while(1)
- {
- KeyNO = Keys_Scan();
- if(KeyNO != -1)
- {
- P2_LED = 0xff;
- P3_LED = 0xff;
- for(i=0;i<=KeyNO;i++)
- {
- if(i<8)
- P3_LED>>=1;
- else
- P2_LED>>=1;
- }
- P3 = P3_LED;
- P2 = P2_LED;
- }
- }
- }
所有资料51hei提供下载:
4×4键盘矩阵控制条形LED显示.zip
(54.05 KB, 下载次数: 16)
|
