lcd1.c

单片机通过L297和L298驱动两项步进电机

#include<reg52.h>
#include<absacc.h>

sbit RS=P2^0;
sbit RW=P2^1;
sbit EN=P2^2;
sbit clock=P2^7;
sbit cc=P1^0;
sbit cc1=P2^6;
sbit high=P3^2;
sbit low=P3^3;

unsigned char Counter=1;Flag1=0;Flag2=0;ccFlag=1;
unsigned int Timerlow;Timerhigh;Counter1=100;
void delay(unsigned long delay_count)
{
	while(delay_count--);
}

void enable(char c)
{
	unsigned char temp;
	do
	{
		RS=0;RW=1;EN=1;
		temp=P0;
		temp&=0x80;
		EN=0;
	}while(temp);
	P0=c;
	RS=0;RW=0;EN=1;
	delay(20);
	EN=0;
}

void WriteCharToLCD(unsigned char c2)
{
	unsigned char temp;
	do
	{
		RS=0;RW=1;EN=1;
		temp=P0;
		temp&=0x80;
		EN=0;
    }while(temp);
	if(c2==0x0D)return;
	P0=c2;
	RS=1;RW=0;EN=1;
	EN=0;
	delay(300);
}

void InitialLCD(void)
{
	enable(0x01);delay(200);
	enable(0x38);
	enable(0x0c);
	enable(0x14);
	delay(2000);
}

void ClearLCD(void)
{
	enable(0x01);
	delay(200);
	enable(0x0c);
}

void WriteStrToLCD(unsigned char row,unsigned char col,unsigned char *c)
{
	unsigned char count=0,tempAC;
	switch(col)
	{
		case 1:enable(0x80+row-1);break;
		case 2:enable(0xC0+row-1);break;
		default:
			break;
	}
	count=0;
	while(*c!=0)
	{
		delay(20);
		WriteCharToLCD(*c);
		c++;
		P0=0xFF;
		delay(100);
		RS=0;RW=1;EN=1;
		tempAC=P0;
		EN=0;
		tempAC&=0x7F;
		if(tempAC==0x14)
		enable(0x80+0x40);
		if(tempAC==0x54)
		enable(0x80+0x14);
		if(tempAC==0x40)
		enable(0x80+0x54);
	}
}
/*
void InitialTC(void)
{
	TMOD=0x1F;
	TH1=0x0;TL1=0x68; //T1=1000;
	EA=1;
	ET1=1;
	TR1=1;
	EX0=1;EX1=1;
	TF1=0;
	IE0=0;
	IE1=0;
}

void InterruptEX0 (void) interrupt 0
{
	if(Counter<=3)
	{
		++Counter;
	}
}
void InterruptEX1 (void) interrupt 2
{
	if(Counter>=1)
	{
		--Counter;
	}
}

/*void InterruptT1 (void) interrupt 3
{
	clock=(~clock);
	switch(Counter)
	{
		case 1:	Timerhigh=0x27;Timerlow=0x10; //T1=10000,--100Hz
		case 2:	Timerhigh=0x13;Timerlow=0x88; //T1=5000,--200Hz
		case 3:	Timerhigh=0x07;Timerlow=0xD0; //T1=2000,--500Hz
		case 4:	Timerhigh=0x03;Timerlow=0xE8; //T1=1000,--1000Hz
		default: Timerhigh=0x03;Timerlow=0xE8;
			break;
	}
	TH1=Timerhigh;TL0=Timerlow;
} */

void main(void)
{
//	InitialTC();
	InitialLCD();
	delay(100);
	ClearLCD();
	delay(100);
	WriteStrToLCD(1,1,"  Motor Driver");
	WriteStrToLCD(1,2,"Design by:IC lab");
	delay(20000);
	WriteStrToLCD(1,2,"   Speed:high   ");
	P2=(P2|0x0F8);
	while(1)
	{
	/*	switch(Counter)
		{
		case 1:	Counter1=1000;WriteStrToLCD(1,2,"Frequency:100 Hz"); //T1=10000,--100Hz
		case 2:	Counter1=500;WriteStrToLCD(1,2,"Frequency:200 Hz"); //T1=5000,--200Hz
		case 3:	Counter1=200;WriteStrToLCD(1,2,"Frequency:500 Hz"); //T1=2000,--500Hz
		case 4:	Counter1=100;WriteStrToLCD(1,2,"Frequency:1000Hz"); //T1=1000,--1000Hz
		default: 
			break;
		} */
		if(high==0)
		{
			Counter1=100;
			WriteStrToLCD(1,2,"   Speed: high  ");
		}
		if(low==0)
		{
			Counter1=1000;
			WriteStrToLCD(1,2,"   Speed: low   ");
		}
		delay(Counter1);
		clock=(~clock);
	
		if(cc==0)
		{
			delay(50);
			cc1=(~cc1);
			delay(50);
			ccFlag=1;
		}
		if(ccFlag==1)
		{	
			ccFlag=0;
			if(cc1==1)
			{
				WriteStrToLCD(1,1,"  direction: +  ");	
			}
			else
			{
				WriteStrToLCD(1,1,"  direction: -  ");
			}
		}	 
	
	}
}