89c52.c

很好的程序哦

#include <AT89X52.H>

#define LED_0	0xc0
#define	LED_1	0xf9
#define	LED_2	0xa4
#define	LED_3	0xb0
#define	LED_4	0x99
#define	LED_5	0x92
#define	LED_6	0x82
#define	LED_7	0xf8
#define	LED_8	0x80
#define	LED_9	0x90
#define LED_d	0x7f

#define LED_f0	0x02
#define LED_f1	0x04
#define LED_f2	0x08
#define LED_f3	0x10
#define LED_f4	0x20
#define LED_f5  0x40

#define t2_2	2
#define	t2_20	20

float fx = 0;
int flag;
int t2;
int f[6] = {0, 0, 0, 0, 0, 0};



void fx_init(void)
{
	long temp_fx;
	if(fx >= 1000000)
	{
		temp_fx = (long)(fx);
		flag = 0;
	}
	else if(fx >= 100000)
	{
		temp_fx = (long)(fx * 10);
		flag = 1;
	}
	else if(fx >= 10000)
	{
		temp_fx = (long)(fx * 100);
		flag = 2;
	}
	else if(fx >= 1000)
	{
		temp_fx = (long)(fx * 1000);
		flag = 3;
	}
	else if(fx >= 100)
	{
		temp_fx = (long)(fx * 10000);
		flag = 4;
	}
	f[0] = temp_fx / 1000000;
	temp_fx %= 1000000;
	f[1] = temp_fx / 100000;
	temp_fx %= 100000;
	f[2] = temp_fx / 10000;
	temp_fx %= 10000;
	f[3] = temp_fx / 1000;
	temp_fx %= 1000;
	f[4] = temp_fx / 100;
	temp_fx %= 100;
	f[5] = temp_fx / 10;
}

void show(int t)
{
	if(t == 0)
		P0 = LED_0;
	else if(t == 1)
		P0 = LED_1;
	else if(t == 2)
		P0 = LED_2;
	else if(t == 3)
		P0 = LED_3;
	else if(t == 4)
		P0 = LED_4;
	else if(t == 5)
		P0 = LED_5;
	else if(t == 6)
		P0 = LED_6;
	else if(t == 7)
		P0 = LED_7;
	else if(t == 8)
		P0 = LED_8;
	else if(t == 9)
		P0 = LED_9;
        else if(t == 10)
                P0 = LED_d;
        P0 = 0xff;
}

void Led_show(void)
{
		P2 = LED_f0;
		show(f[0]);
		P2 = LED_f1;
		show(f[1]);
		P2 = LED_f2;
		show(f[2]);
		P2 = LED_f3;
		show(f[3]);
		P2 = LED_f4;
		show(f[4]);
		P2 = LED_f5;
		show(f[5]);
		if(flag == 0)
		{
			P2 = LED_f5;
			show(10);
		}
		else if(flag == 1)
		{
			P2 = LED_f4;
			show(10);
		}
		else if(flag == 2)
		{
			P2 = LED_f3;
			show(10);
		}
		else if(flag == 3)
		{
			P2 = LED_f2;
			show(10);
		}
		else if(flag == 4)
		{
			P2 = LED_f1;
			show(10);
		}
}

void time_2() interrupt 5
{
	static int i = 0;
	TF2 = 0;
	if(i >= t2)
	{
		i = 0;
		P1_0 = ~P1_0;
	}
	else
		i++;

}

void device_init(void)
{
        T2MOD = 0x02;
	T2CON = 0x04;
	TH2 = 0x3C;
	TL2 = 0xB0;
	RCAP2H = 0x3C;
	RCAP2L = 0xB0;
	TMOD = 0xDD;
	TH0  = 0x00;
	TL0  = 0x00;
	TH1  = 0x00;
	TL1  = 0x00;
 	TCON = 0x50;
	IE   = 0xA0;
}

void main(void)
{
	float nx, ns;
	int a, b;
	t2 = t2_2;
        /*fx = 100;
        fx_init();
        while(1)
        {
		Led_show();
        }*/
	device_init();
	while(1)
	{
		while (P1_0 == 0)
		{
			TCON = 0x00;
			a    = TL0;
			b    = TH0;
			nx   = (b<<8)+a;
			/*if(nx == 0)
			{
				t2 = t2_20;
				device_init();
			}*/
                        a    = TL1;
			b    = TH1;
			ns   = (b<<8)+a;
			fx   = nx/ns*10000000;
			TH0  = 0x00;
			TL0  = 0x00;
			TH1  = 0x00;
			TL1  = 0x00;
			fx_init();
			Led_show();
		}
	}
}