AC_CourseDesign/dianji.c at master · Excaive/AC_CourseDesign · GitHub

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//直流电机PWM调速系统设计

#include <reg52.h>

int i,d0,v;
int table[]={0xc0,0xf9,0xa4,0xb0,0x99,
             0x92,0x82,0xf8,0x80,0x90};
sbit P1_0 = P1^0;
sbit P1_1 = P1^1;
sbit P2_0 = P2^0;
sbit P2_1 = P2^1;
sbit P2_2 = P2^2;
sbit P2_3 = P2^3;
sbit key1 = P3^5;
sbit key2 = P3^4;
sbit key3 = P3^3;
sbit key4 = P3^2;

void main()
{
	int j,m1,m2,m3,m4;

	d0 = 1;
	v = 1;
	m4 = 1;
	P1 = 0xff;

	TMOD = 0x01;
	TH0 = 0xff;
	TL0 = 0x9c;
	EA = 1;		//开中断
	ET0 = 1;		//允许定时器0中断
	TR0 =1 ;		//启动定时器0

	while(1)
	{
		P0=table[m1];
		P2_0 = 0;
		for(j=0;j<20;j++);
		P2_0 = 1;

		P0=table[m2];
		P2_1 = 0;
		for(j=0;j<20;j++);
		P2_1 = 1;

		P0=table[m3];
		P2_2 = 0;
		for(j=0;j<20;j++);
		P2_2 = 1;

		P0=table[m4];
		P2_3 = 0;
		for(j=0;j<20;j++);
		P2_3 = 1;

		if(key1==0)
		{
			while(key1==0);
			d0 = !d0;
			m2 = !m2;
		}

		if(key2==0)
		{
			v = 1;
			m4 = 1;
		}

		if(key3==0)
		{
			v = 2;
			m4 = 2;
		}


		if(key4==0)
		{
			v = 3;
			m4 = 3;
		}
	}
}

void t0(void) interrupt 1
{
	TH0 = 0xff;
	TL0 = 0x9c;

	i++;
	if(i>=5)
		i = 0;
	if(i<v)
	{
	 	if(d0==1)
			P1_0 = 0;
		else
			P1_1 = 0;
	}
	else
	{	P1_0 = 1;
		P1_1 = 1;
	}
}