test.c

4x4键盘

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*********************************** 程序功能说明 *********************************************
  							4位数码管从0到F依次循环显示						
********************************************************************************************/

#include <reg52.h>

sbit s1 = P2^0;
sbit s2 = P2^1;
sbit s3 = P2^2;
sbit s4 = P2^3;
sbit en = P2^5;
/* 
		0xC0,  // 0
		0xF9,  // 1
        0xA4,  // 2
        0xB0,  // 3
        0x99,  // 4
        0x92,  // 5
        0x82,  // 6
        0xF8,  // 7
        0x80,  // 8
        0x90,  // 9
		0x88,  // A
        0x83,  // b
        0xC6,  // C 
        0xA1,  // d
        0x86,  // E
        0x8E,  // F

*/

void Delay(int m)
{
	while(--m);
}

void main(void)
{
	en = 1;
	while(1)
	{
		s1 = 0;
		P0 = 0xC0;
		Delay(50000);     //display  0
		s1 = 1;
		s2 = 0;
		P0 = 0xF9;
		Delay(50000);      //display  1
		s2 = 1;
		s3 = 0;
		P0 = 0xA4;
		Delay(50000);      //display  2
		s3 = 1;
		s4 = 0;
		P0 = 0xB0;
		Delay(50000);      //display  3
		s4 = 1;
		s1 = 0;
		P0 = 0x99;
		Delay(50000);      //display  4
		s1 = 1;
		s2 = 0;
		P0 = 0x92;
		Delay(60000);      //display  5
		s2 = 1;
		s3 = 0;
		P0 = 0x82;
		Delay(60000);      //display  6
		s3 = 1;
		s4 = 0;
		P0 = 0xF8;
		Delay(60000);      //display  7
		s4 = 1;

		s1 = 0;
		P0 = 0x80;
		Delay(50000);      //display  8
		s1 = 1;
		s2 = 0;
		P0 = 0x90;
		Delay(60000);      //display  9
		s2 = 1;
		s3 = 0;
		P0 = 0x88;
		Delay(50000);      //display  A
		s3 = 1;
		s4 = 0;
		P0 = 0x83;
		Delay(50000);      //display  b
		s4 = 1;
		s1 = 0;
		P0 = 0xC6;
		Delay(50000);      //display  C
		s1 = 1;
		s2 = 0;
		P0 = 0xA1;
		Delay(50000);      //display  d
		s2 = 1;
		s3 = 0;
		P0 = 0x86;
		Delay(50000);      //display  E
		s3 = 1;
		s4 = 0;
		P0 = 0x8E;
		Delay(50000);      //display  F
		s4 = 1;


	}
}