【C51】24小时制的电子钟，数码管显示格式为时-分-秒

		unsigned char Data[8]={2,4,16,1,2,16,1,7};
		for(location=1;location<=8;location++){
			if(location==3||location==6){
				NixieX(location,0x40);
			}else{
				Nixie(location,Data[location-1]);
			}
			
		}

#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};
unsigned char Start = 0;
// 初始时间
unsigned char Data[8]={1,1,16,5,9,16,5,0};

void Timer0Init(void) // 1毫秒@12.000MHz
{
	// AUXR |= 0x80;		//定时器时钟1T模式
	TMOD &= 0xF0; // 设置定时器模式
	TMOD |= 0x01;
	TL0 = 0x18;	  // 设置定时初值
	TH0 = 0xFC;	  // 设置定时初值
	TF0 = 0;	  // 清除TF0标志
	TR0 = 1;	  // 定时器0开始计时
	ET0 = 1;
	EA = 1;
	PT0 = 0;
}

// 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 NixieX(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 = Number; // 段码输出
	Delay(1);
	P0 = 0x00;
}

void Timer0_Routine() interrupt 1
{
	static unsigned int T0Count;
	TL0 = 0x18; // 设置定时初值
	TH0 = 0xFC; // 设置定时初值
	T0Count++;
	if (T0Count >= 1000)
	{
		T0Count = 0;
		Start++;
		if (Start == 16)
		{
			Start = 0;
		}
		Data[7]++;
		if(Data[7]==10){ Data[7]=0;Data[6]++;};
		if(Data[6]==6){ Data[6]=0;Data[4]++;};
		if(Data[4]==10){ Data[4]=0;Data[3]++;};
		if(Data[3]==6) { Data[3]=0;Data[1]++;};
		if(Data[1]==10) {Data[1]=0;Data[0]++;};
		if(Data[0]==12){ Data[0]=0;};
	}
}

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;
	Timer0Init();
	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);
		*/
		/*
			hexNum = Start;
			for (location = 1; location <= 8; location++) {
				if(hexNum==16){
					hexNum=0;
				}
				Nixie(location, hexNum);
				hexNum++;

			}
		*/

		for(location=1;location<=8;location++){
			if(location==3||location==6){
				NixieX(location,0x40);
			}else{
				Nixie(location,Data[location-1]);
			}
			
		}
		
	}
}