keypad.c

#pragma SMALL
#include <reg52.h>
sbit p10 = P1^0;
sbit p11 = P1^1;
sbit kr1 = P2^0;
sbit kr2 = P2^1;
sbit kr3 = P2^2;
sbit kr4 = P2^3;
sbit kc1 = P2^4;
sbit kc2 = P2^5;
sbit kc3 = P2^6;
sbit kc4 = P2^7;



void delay(int count){
	int i, j;
	for (i = 0; i < count; i++)
		for (j = 0; j < 500; j++);
}

void main(){
	int count = 0;
	int display[] = {0x3F, 0x06, 0x5B, 0x4F, 0x66, 0x6D, 0x7D, 0x07, 0x7F, 0x6F, 0x77, 0x7C, 0x39, 0x5E, 0x79, 0x71};
	int check = 0;
	bit push = 0;
	P0 = 0;
	while(1){
		//count = (count + 1 ) % 16;
		//P0 = display[2];
		//delay(100);
		
		kc1 = 0;
		if (kr1 == 0 && kr2 == 1 && kr3 == 1 && kr4 == 1) {
			P0 = display[1];
		}
		if (kr1 == 1 && kr2 == 0 && kr3 == 1 && kr4 == 1) {
			P0 = display[2];
		}
		if (kr1 == 1 && kr2 == 1 && kr3 == 0 && kr4 == 1) {
			P0 = display[3];
		}
		if (kr1 == 1 && kr2 == 1 && kr3 == 1 && kr4 == 0) {
			P0 = display[10];
		}
		kc1 = 1;

		kc2 = 0;
		if (kr1 == 0 && kr2 == 1 && kr3 == 1 && kr4 == 1) {
			P0 = display[4];
		}
		if (kr1 == 1 && kr2 == 0 && kr3 == 1 && kr4 == 1) {
			P0 = display[5];
		}
		if (kr1 == 1 && kr2 == 1 && kr3 == 0 && kr4 == 1) {
			P0 = display[6];
		}
		if (kr1 == 1 && kr2 == 1 && kr3 == 1 && kr4 == 0) {
			P0 = display[11];
		}
		kc2 = 1;

		kc3 = 0;
		if (kr1 == 0 && kr2 == 1 && kr3 == 1 && kr4 == 1) {
			P0 = display[7];
		}
		if (kr1 == 1 && kr2 == 0 && kr3 == 1 && kr4 == 1) {
			P0 = display[8];
		}
		if (kr1 == 1 && kr2 == 1 && kr3 == 0 && kr4 == 1) {
			P0 = display[9];
		}
		if (kr1 == 1 && kr2 == 1 && kr3 == 1 && kr4 == 0) {
			P0 = display[12];
		}
		kc3 = 1;

		kc4 = 0;
		if (kr1 == 0 && kr2 == 1 && kr3 == 1 && kr4 == 1) {
			P0 = display[13];
		}
		if (kr1 == 1 && kr2 == 0 && kr3 == 1 && kr4 == 1) {
			P0 = display[0];
		}
		if (kr1 == 1 && kr2 == 1 && kr3 == 0 && kr4 == 1) {
			P0 = display[14];
		}
		if (kr1 == 1 && kr2 == 1 && kr3 == 1 && kr4 == 0) {
			P0 = display[15];
		}
		kc4 = 1;

	}
}