ÿþ#include "REG51.h"

#include "intrins.h"

sbit LCD_CS = P0^7;

sbit LCD_RES = P0^6;

sbit LCD_A0 = P0^5;

sbit LCD_CLK = P0^4;

sbit LCD_SDI = P0^3;

//========================================================================

// Function name: void LCD_DataWrite(unsigned int Data)

// Description: Write 1 byte date to display RAM

// Parameters: Write data

// Return: None

// Comments: None

// Version:

// 2007/05/17 First version

//========================================================================

void LCD_DataWrite(unsigned char Dat)//,_Fill_Dot_LCD

{

unsigned char Num;

LCD_CS = 0;

LCD_A0 = 1;

for(Num=0;Num<8;Num++)

{

if((Dat&0x80) == 0) LCD_SDI = 0;

else LCD_SDI = 1;

Dat = Dat << 1;

LCD_CLK = 0;

LCD_CLK = 1;

}

LCD_CS = 1;

12

}

//========================================================================

// Function name: void LCD_RegWrite(unsigned char Command)

// Description: Write 1 byte data to control register

// Parameters: Command , write data

// Return: None

// Comments: None

// Version:

// 2007/05/17 First version

//========================================================================

void LCD_RegWrite(unsigned char Command)

{

unsigned char Num;

LCD_CS = 0;

LCD_A0 = 0;

for(Num=0;Num<8;Num++)

{

if((Command&0x80) == 0) LCD_SDI = 0;

else LCD_SDI = 1;

Command = Command << 1;

LCD_CLK = 0;

LCD_CLK = 1;

}

LCD_CS = 1;

}

Users can refer to following code to write LCD initial function.(*Recommended)

//========================================================================

// Function name: void LCD_Init(void)

// Description: LCD initial function. Users can refer to ST7565 datasheet for more information

// Parameters: None

// Return: None

// Comments: None

// Version:

// 2006/10/15 First version

// 2007/01/09 V1.2

//========================================================================

//Delay

void TimeDelay(int Time)

13

{

int i;

if(Time > 0)

{

for(i = 0;i < 800;i++)

{

}

Time --;

}

}

void LCD_Init(void)

{

//Initial all of port LCD driver use(if necessary)

// LCD_PortInit();

TimeDelay(200);

LCD_RS = 0;

TimeDelay(200);

LCD_RS = 1;

LCD_RegWrite(0xaf); // LCD On

LCD_RegWrite(0x2f); // Set power control mode

LCD_RegWrite(0x81); // Set electronic volume mode

LCD_RegWrite(0x1f); // Command data 0x0000~0x003f

LCD_RegWrite(0x27); // Set V5 internal voltage adjustment resistor

LCD_RegWrite(0xa2); // Set LCD bias

LCD_RegWrite(0xc8); // Com scan direction set, reverse

LCD_RegWrite(0xa0); // Select segment direction, normal

LCD_RegWrite(0xa4); // Set all point ON/OFF command

LCD_RegWrite(0xa6); // Set normal/reverse display command

LCD_RegWrite(0xac); // Close static indicator

LCD_RegWrite(0x00); // Command data

LCD_RegWrite(0x40 +0); // Set start common RAM

LCD_RegWrite(0xe0); // Set read/write mode

}