C51单片机数码管示例代码

#include <REGX52.H>

//数码管段码表
unsigned char NixieTable[] = {0x3F, 0x06, 0x5B, 0x4F, 0x66, 0x6D, 0x7D, 0x07, 0x7F, 0x6F, 0x77, 0x7C, 0x39, 0x5E, 0x79, 0x71};
//延时子函数
void Delay(unsigned int xms)
{
	unsigned char i, j;
	while(xms--)
	{
		i = 2;
		j = 239;
		do
		{
			while (--j);
		} while (--i);
	}
}
//数码管显示子函数
void Nixie(unsigned char Location,Number)
{
	switch(Location)		//位码输出
	{
		case 1:P2_4=1;P2_3=1;P2_2=1;break;
		case 2:P2_4=1;P2_3=1;P2_2=0;break;
		case 3:P2_4=1;P2_3=0;P2_2=1;break;
		case 4:P2_4=1;P2_3=0;P2_2=0;break;
		case 5:P2_4=0;P2_3=1;P2_2=1;break;
		case 6:P2_4=0;P2_3=1;P2_2=0;break;
		case 7:P2_4=0;P2_3=0;P2_2=1;break;
		case 8:P2_4=0;P2_3=0;P2_2=0;break;
	}
	P0=NixieTable[Number];	//段码输出
	Delay(1);
	P0=0x00;
}

void main()
{
	unsigned char hexNum = 0; // 用于存储当前要显示的十六进制数
	//Nixie(2,3);	//在数码管的第2位置显示3
	unsigned char location = 1;
	while(1)
	{
		/*
		Nixie(1,0);	//在数码管的第1位置显示0
		Nixie(2,0);	
		Nixie(3,0);
		Nixie(4,0);
		Nixie(5,0);
		Nixie(6,0);
		Nixie(7,0);
		Nixie(8,0);
		*/
	for (location = 1; location <= 8; location++) {
		Nixie(location, hexNum);
		hexNum++;
	}
		hexNum = 0;
	}
}