key-led.zip_led matrix c_键盘控制led_键盘显示算法

#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; } } }