p12_2.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 PAGE0[] = { 
	 	0xf0, 0x08, 0x04, 0x12, 0x11, 0x11, 0x01, 0x0C1,
		0x01, 0x01, 0x11, 0x11, 0x12, 0x04, 0x08, 0xf0 };
unsigned char PAGE1[] = {
		0x0f, 0x10, 0x20, 0x40, 0x80, 0x90, 0x90, 0x93,
		0x92, 0x90, 0x90, 0x88, 0x40, 0x20, 0x10, 0x0f };
void LCDDisplay()
{
	char i;
	Write_Cmd(0xbc);
	Write_Cmd(0x57);
	for( i = 0; i < 16; i++ )
	{
		Write_Data(PAGE0[i]);
	}
	Write_Cmd(0xbd);
	Write_Cmd(0x57);
	for( i = 0; i < 16; i++ )
	{
		Write_Data(PAGE1[i]);
	}
}
main()
{
	CS1 = 0;
	CS2 = 0;
	Write_Cmd(0x3f);
	Clear();
	LCDDisplay();
	while(1){}
}