矩阵按键 矩阵按键 矩阵按键

#include <reg51.h> #define uchar unsigned char #define uint unsigned int uchar code seg[10] = {0xc0, 0xf9, 0xa4, 0xb0, 0x99, 0x92, 0x82, 0xf8, 0x80, 0x90}; uchar code location[8] = {0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80}; uchar cache[8] = {0, 0, 0, 0, 0, 0, 0, 0}; bit flag = 0; uchar keyNum = 0; sbit P10 = P1^0; sbit P11 = P1^1; sbit P12 = P1^2; sbit P13 = P1^3; sbit P14 = P1^4; sbit P15 = P1^5; sbit P16 = P1^6; sbit P17 = P1^7; void Change(uchar a, b, c, d, e, f, g, h) { cache[0] = a; cache[1] = b; cache[2] = c; cache[3] = d; cache[4] = e; cache[5] = f; cache[6] = g; cache[7] = h; } void Delay(uint ms) { uint i = 0; uchar j = 0; for(i = ms; i > 0; i--) for(j = 120; j > 0; j--); } void Display() { uchar i = 0; for(i = 0; i < 8; i++) { P3 = location[i]; P2 = 0xff; P2 = seg[cache[i]]; } } void KeyScan() { uchar x = 0; uchar y = 0; if(flag == 0) { P1 = 0x0f; if(P10 == 0 || P11 == 0 || P12 == 0 || P13 == 0) { if(P10 == 0) x = -1; if(P11 == 0) x = 3; if(P12 == 0) x = 7; if(P13 == 0) x = 11; } P1 = 0xf0; if(P14 == 0 || P15 == 0 || P16 == 0 || P17 == 0) { if(P14 == 0) y = 4; if(P15 == 0) y = 3; if(P16 == 0) y = 2; if(P17 == 0) y = 1; } if(y == 0) flag = 0; else { keyNum = x + y; flag = 1; } } } void main() { while(1) { KeyScan(); if(flag == 0) flag = 1; Change(0, 0, 0, 0, 0, 0, keyNum / 10, keyNum % 10); Display(); } }