display.c

液晶屏的单片机demo程序

#include <reg52.h> // SFR declarations
#include <head.h> // SFR declarations


extern unsigned char x,y;

void delay(unsigned int num)
{
	while(num--)
	{
		;
	}

}

void lw(unsigned char x,unsigned char y,unsigned char dd)
{
	if (x<61)
		{	e1=e2=1;
			di=rw=0;P1=0xb8|y;e1=1;delay(2);e1=0;delay(2);
			e1=e2=1;
			di=rw=0;P1=0x00|x;e1=1;delay(2);e1=0;delay(2);
			e1=e2=1;
			di=1;rw=0;P1=dd;e1=1;delay(2);e1=0;delay(2);
			e1=e2=1;
		}
	 else
		{
			x=x-61;e1=e2=1;
			di=rw=0;P1=0xb8|y;e2=1;delay(2);e2=0;delay(2);
			e1=e2=1;
			di=rw=0;P1=0x00|x;e2=1;delay(2);e2=0;delay(2);
			e1=e2=1;
	 		di=1;rw=0;P1=dd;e2=1;delay(2);e2=0;delay(2);
	 		e1=e2=1;
		}
	P1=0xff;
}

void clear_screen(unsigned char Row)
{
	unsigned char x,y;
	for (y=0;y<Row;y++)
	{
		for (x=0;x<122;x++)
		       lw(x,y,0x00);
	}
}
void write_chinese(unsigned char x,unsigned char y,unsigned char code*array)
{
	unsigned char j,dd;
	for(j=0;j<32;j++)
	{
		dd= array[j];
		if(j<16) lw(x+j,y,dd);
		else     lw(x+j-16,y+1,dd);
	}
}

void send_command(unsigned char cmd)
{
        e1=e2=1;
        delay(2);
	e1=e2=0;
	di=rw=0;
	P1=cmd;
	e1=e2=1;
	delay(2);
	e1=e2=0;
	delay(2);
	P1=0xff;
	e1=e2=1;
}
unsigned char read(void)
{
        unsigned char status;
        e1=e2=1;
        delay(2);
	e1=e2=0;
        di=0;rw=1;
        delay(2);
        e1=e2=1;
        delay(2);
        e1=e2=0;
        status=P1;
        delay(2);
        e1=e2=1;
        return(status);
}
void lcd_init(void)
{
	rst = 1;
        delay(2);
        rst = 0;
        delay(2);
        x=read();
        rst = 1;
        x=read();
        delay(50000);

	send_command(0xae);
        send_command(0xc0);
 	send_command(0xa4);
	send_command(0x00);
	send_command(0xbb);
	send_command(0xa9);
	send_command(0xa0);
	send_command(0xee);
/*
	for (y=0;y<4;y++)
	{
		for (x=0;x<122;x++) lw(x,y,0);
	}
*/
	send_command(0xaf);
        delay(60000);
}