p12_3.c

单片机原理与应用实例教程 单片机原理与应用实例教程

#include "REG51.H"
sbit E	= P3^0;
sbit RW	= P3^1;
sbit RS	= P3^2;
sbit CS1 = P3^6;
sbit CS2 = P3^7;
#define LCD P2	
void Wait()
{
	unsigned char state;
	while(1)
	{
		LCD = 0xff;
		RW	= 1;
		RS	= 0;
		E	= 1;
		state = LCD;
		E 	= 0;
	
		LCD = 0xff;
		RW	= 1;
		RS	= 0;
		E	= 1;
		state = LCD;
		E	= 0;
	
		state = state >> 7;
		if( state == 0 )
			break;
	}
}
void Write_Cmd( unsigned char Cmd)
{
	Wait();
	LCD = Cmd;
	RS	= 0;
	RW	= 0;
	E	= 1;
	E	= 0;
}
void Write_Data( unsigned char D)
{
	Wait();
	LCD = D;
	RS	= 1;
	RW	= 0;
	E	= 1;
	E	= 0;
}
void Clear()
{
	char col, page, temp;
	for( page = 0; page < 8; page++ )
	{
		temp = page;
		temp = temp | 0xb8;
		Write_Cmd(temp);
		Write_Cmd(0x40);
		for( col = 0; col < 64; col++ )
		{
			Write_Data(0);
		}
	}
}
unsigned char Word1[] = { 
	 	0x10,0x60,0x01,0x86,0x60,0x04,0x1C,0xE4,
		0x04,0x04,0x04,0xE4,0x1C,0x04,0x00,0x00,
		0x04,0x04,0x7E,0x01,0x40,0x20,0x20,0x10,
		0x0B,0x04,0x0B,0x10,0x30,0x60,0x20,0x00 };
unsigned char Word2[] = {
		0x00,0x10,0x0C,0x24,0x24,0x24,0x25,0x26,
		0xA4,0x64,0x24,0x04,0x14,0x0C,0x00,0x00,
		0x00,0x02,0x02,0x02,0x02,0x42,0x82,0x7F,
		0x02,0x02,0x02,0x02,0x02,0x02,0x02,0x00 };

void Dsp_Word( unsigned char page, unsigned char col, 
							unsigned nCS, unsigned char* szWord )
{
	unsigned char temp;

	if( nCS == 1 )
	{
		CS1 = 0;
		CS2 = 1;
	}
	else
	{
		CS1 = 1;
		CS2 = 0;
	}
	Write_Cmd(page | 0xb8);
	Write_Cmd(col | 0x40);
	for( temp = 0; temp < 16; temp++ )
	{
		Write_Data(szWord[temp]);
	}
	Write_Cmd( (page+1) | 0xb8);
	Write_Cmd(col | 0x40);

	for( temp = 16; temp < 32; temp++ )
	{
		Write_Data(szWord[temp]);
	}
}

void LCDDisplay()
{
	Dsp_Word( 3, 23, 2, Word1 );
	Dsp_Word( 3, 23, 1, Word2 );
}

main()
{
	CS1 = 0;
	CS2 = 0;
	Write_Cmd(0x3f);
	Clear();
	LCDDisplay();
	while(1){}
}