lcd.c.bak

16×2点阵字符型LCD模块间接控制方式电路原理图及Keil C51驱动程序-display

#include <reg52.h>    
#define uchar unsigned char
idata char flag0 ;
idata char flag1 ;
idata char flag2 ;
idata char flag3 ;
idata char flag4 ;
idata char flag5 ;
idata char flag6 ;
idata char flag7 ;
sbit RS=P2^3;
sbit RW=P2^4;
sbit LCDE=P2^5;
sbit big=P3^2;
sbit fd=P3^3;
unsigned char line1[16],line2[16];
unsigned char code cgram1[64]={0x00,0x1f,0x12,0x09,0x1f,0x11,0x01,0x0f,
0x1e,0x04,0x04,0x08,0x1f,0x01,0x00,0x1e,
0x02,0x03,0x06,0x05,0x04,0x09,0x09,0x12,
0x00,0x1c,0x04,0x08,0x10,0x18,0x04,0x07,
0x00,0x0f,0x09,0x09,0x0f,0x09,0x09,0x0f,0x00,0x1c,0x04,0x04,0x1c,0x04,0x04,0x1c,
0x00,0x04,0x14,0x14,0x14,0x04,0x04,0x03,0x00,0x12,0x13,0x11,0x01,0x04,0x04,0x1c};//爱思


void delay5ms()
{
	register int i;
	for (i=0;i<1000;i++)
	;
}

void delay50us()
{
	register int i;
	for (i=0;i<20;i++)
	;
}

wr_com(unsigned char comm)
{
		LCDE=0;
		RS=0;
		RW=0;
		LCDE=1;
		P0=comm;
		RS=0;
		RW=0;
		LCDE=0;
}

wr_data(unsigned char dat)
{
		LCDE=0;
		RS=0;
		RW=0;
		RS=1;
		RW=0;
		LCDE=1;
		P0=dat;
  		LCDE=0;
		RS=0;
		RW=0;
}


unsigned char rd_bf()
{
		unsigned char i;
		P0=0xff;
		LCDE=0;
		RS=0;
		RW=0;
		RS=0;
		RW=1;
		LCDE=1;
		i=P0;
  		LCDE=0;
		return(i);
}
	
void init()
{
	unsigned char in,i;
	wr_com(0x30);
	delay5ms();
	wr_com(0x30);
	delay5ms();
	wr_com(0x30);
	delay5ms();
	in=rd_bf();
	delay5ms();
	wr_com(0x01);
	delay5ms();
	in=rd_bf();
	delay5ms();
	wr_com(0x06);
	delay5ms();
	in=rd_bf();
	delay50us();
	wr_com(0x38);
	delay50us();
	in=rd_bf();
	delay50us();
	wr_com(0x0c);
	delay50us();
	in=rd_bf();
	delay50us();
	
	wr_com(0x40);		//set cgram address
	delay50us();
	in=rd_bf();
	delay50us();
	for(i=0;i<64;i++)
	{
		wr_data(cgram1[i]);		//display "0"
		delay50us();
		in=rd_bf();
	}
	
	






}


display_162()
{
			unsigned char in,i;
		wr_com(0x80);		//set ram address
		delay50us();
		in=rd_bf();
		delay50us();
		for(i=0;i<16;i++)
		{
			wr_data(line1[i]);		//display "0"
			delay50us();
			in=rd_bf();
		}
		in=rd_bf();
		delay50us();
		wr_com(0xc0);
		delay50us();
		in=rd_bf();
		delay50us();
		for(i=0;i<16;i++)
		{
			wr_data(line2[i]);		//display "0"
			delay50us();
			in=rd_bf();
		}
}
main()
{
	unsigned char in,i,da;
	delay5ms();
	delay5ms();
	delay5ms();
	delay5ms();
	   
		
	init();	

	while(1)
	{
		if(fd==1)
		{
				line1[0]=0x20;
				line1[1]=0;		//display "爱思"
				line1[2]=1;
				line1[3]=4;
				line1[4]=5;
				line1[5]=0x20;
				line1[6]=0;		//display "爱思"
				line1[7]=1;
				line1[8]=4;
				line1[9]=5;
				line1[10]=0x20;
				line1[11]=0;		//display "爱思"
				line1[12]=1;
				line1[13]=4;
				line1[14]=5;
				line1[15]=0x20;
				
				line2[0]=0x20;
				line2[1]=2;		//display "爱思"
				line2[2]=3;
				line2[3]=6;
				line2[4]=7;
				line2[5]=0x20;
				line2[6]=2;		//display "爱思"
				line2[7]=3;
				line2[8]=6;
				line2[9]=7;
				line2[10]=0x20;
				line2[11]=2;		//display "爱思"
				line2[12]=3;
				line2[13]=6;
				line2[14]=7;
				line2[15]=0x20;
			
		}	
	else if(big==1)
	{
		da=0x41;
		for(i=0;i<16;i++)
		{
			line1[i]=da;
			da++;	
		}
		
		
		da=0x51;
		for(i=0;i<16;i++)
		{
			line2[i]=da;
			da++;	
		}
	}
	else
	{
		da=0x61;
		for(i=0;i<16;i++)
		{
			line1[i]=da;
			da++;	
		}
		
		
		da=0x71;
		for(i=0;i<16;i++)
		{
			line2[i]=da;
			da++;	
		}
	}
	display_162();	
	}
}