/************************PE5  --->  /CS ***************************************/

/************************PG3  --->  RS  ***************************************/

/************************PG4  --->  /WR ***************************************/

/************************PA0  --->  /RD ***************************************/

/********************PF0-PF7  --->  DATA DB0-DB7 ******************************/

/************************PA1  --->  /RESET ************************************/

/************************PA2  --->  LED+(H)************************************/   

#define LCD_COMMAND  0

//數據

#define LCD_DATA   1

 

#define DATA_IO_INIT() {DDRF=0xFF;PORTF=0x00;}

 

#define LCD_RST_ON() {DDRA|=BIT(1);PORTA&=~BIT(1);}

#define LCD_RST_OFF() {DDRA|=BIT(1);PORTA|=BIT(1);}

 

#define LCD_RS_LOW_COMMAND() {DDRG|=BIT(3);PORTG&=~BIT(3);}

#define LCD_RS_HIGH_DATA() {DDRG|=BIT(3);PORTG|=BIT(3);}

 

#define LCD_RD_LOW() {DDRA|=BIT(0);PORTA&=~BIT(0);}

#define LCD_RD_HIGH() {DDRA|=BIT(0);PORTA|=BIT(0);}

 

#define LCD_WR_LOW() {DDRG|=BIT(4);PORTG&=~BIT(4);}

#define LCD_WR_HIGH() {DDRG|=BIT(4);PORTG|=BIT(4);}

 

#define LCD_CS_LOW_ON() {DDRE|=BIT(5);PORTE&=~BIT(5);}

#define LCD_CS_HIGH_OFF() {DDRE|=BIT(5);PORTE|=BIT(5);}

 

#define LCD_LED_OFF() {DDRA|=BIT(2);PORTA|=BIT(2);}

#define LCD_LED_ON() {DDRA|=BIT(2);PORTA&=~BIT(2);}

 

//ST7586 COMMAND

#define LCD_NOP 0x00

#define LCD_RST 0x01 //軟件復位，RAM內容不清

#define POWER_SAVE_ON 0x10 //0X10，SLEEP,0X11，WAKE UP

#define POWER_SAVE_OFF 0x11

#define PARTIAL_DISPLAY_ON 0x12 //0x12,ON,0x13,OFF

#define PARTIAL_DISPLAY_OFF 0x13

#define INVERSE_DISPLAY_OFF 0x20 //0x20,正顯，0X21，負顯

#define INVERSE_DISPLAY_ON 0x21

#define ALL_PIXEL_ON 0x23 //0x22,off,0X23,on

#define ALL_PIXEL_OFF 0x22

#define DISPLAY_ON 0x29

#define DISPLAY_OFF 0X28

#define SET_COLUMN_ADDRESS 0x2A //0x2A+XS0000H+XE007FH 0<=XS<=XE<=7F

#define SET_ROW_ADDRESS 0x2B //0x2B+YS+YE 0<=YS<=YE<=9F

#define WRITE_DISPLAY_DATA 0x2C

//#define READ_DISPLAY_DATA 0x2E //串口模式無此功能

#define PARTIAL_DISPLAY_AREA 0x30 //個參數

#define SCROLL_AREA 0x33 // TA,SA,BA:0-A0

#define DISPLAY_CONTROL 0x36 //MY,MX1,MX0

#define START_LINE 0x37 //0-9F

#define DISPLAY_MODE 0x38 //四級灰度，39，單色顯示

#define ENABLE_DDRAM_INTERFACE 0x3A //3AH+02H

#define DISPLAY_DUTY 0xB0 //B0+9F

#define FIRST_OUTPUT_COM 0xB1 //B1H+00H

#define FOSC_DIVIDER 0xB3 //B3H+1;0:不分頻,1:2分頻,2:4分頻,3:8分頻

#define PARTIAL_DISPLAY 0xB4 //B4+A0,在局部顯示區域設置之前寫入

#define SET_VOP 0xC0 //+42H+01H

#define VOP_INCREASE 0xC1

#define VOP_DECREASE 0xC2

#define BIAS_SYSYTEM 0xC3  //C3+04;1/10

#define BOOSTER_LEVEL 0xC4 //C4+07

#define VOP_OFFSET 0xC7 //C7+1

#define ANALOG_CONTROL 0xD0 //D0+1D

#define FRAME_RATE 0xF0 //F0+06+0B+0D+12H

/****************************取模方式******************************************/

/******點陣格式--陰碼，列行式，取模走向為逆向**********************************/
//舉一個例子，顯示0，像素16*24，顯示的有效數據的位數一定是要3的倍數
//16*24，寬度是2個字節16位，但是傳輸給LCD顯示時，一定要補2位，是16+2=18

/*************************************16*24*************************************/

const unsigned char Image_0[]=

{0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x07,0xC0,0x0E,0xE0,0x1C,0x70,

0x1C,0x70,0x38,0x38,0x38,0x38,0x38,0x38,0x38,0x38,0x38,0x38,0x38,0x38,0x38,0x38,

0x38,0x38,0x1C,0x70,0x1C,0x70,0x0E,0xE0,0x07,0xC0,0x00,0x00,0x00,0x00,0x00,0x00};/*0*/  

/*******************************LCD寫命令**********************************/

void LCD_Cmd_Write(unsigned char cmd)

   {

       LCD_RS_LOW_COMMAND();

  LCD_RD_HIGH();

       /*LCD_ChkBusy();*/         //Call LCD_ChkBusy to Check Busy Bit

  LCD_WR_LOW();

  NOP();

  NOP();

  DDRF = 0xFF;

  PORTF = cmd;

       LCD_CS_LOW_ON();

  NOP();

  NOP();

       LCD_WR_HIGH();

      Some_NOP(3);

  LCD_CS_HIGH_OFF();

   }

/*****************************LCD寫數據**********************************/

void LCD_Data_Write(unsigned char data)

   {

      /*LCD_ChkBusy(); */      //Call LCD_ChkBusy to Check Busy Bit

      DDRF = 0xFF;

 LCD_RS_HIGH_DATA();

 LCD_RD_HIGH();

      PORTF = data;

 LCD_WR_LOW();

 NOP();

 NOP();

 LCD_CS_LOW_ON();     

      NOP()

 NOP();

      LCD_WR_HIGH();

      Some_NOP(3);

      LCD_CS_HIGH_OFF();

   }  
   }
   }  

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

// 畫圖函數

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

void Image_Disp(uchar x,uchar y,uchar width,uchar high,const uchar *pstr)

// 坐標(x,y)，x為水平方向字符位（1個字符位占3個像素點）；y為垂直方向像素行；

// width：圖片寬度，按照水平方向像素點計算；high：為圖片高度，按照像素點計算，*pstr 圖片數組名

   {

  uchar i,j,k,data,temp;

  LCD_Cmd_Write(0x2a); // Column Address Setting

  LCD_Data_Write(0x00); // 

  LCD_Data_Write(x); // 

  LCD_Data_Write(0x00);

  LCD_Data_Write((width/3)+x-1); //

  LCD_Cmd_Write(0x2b); // Row Address Setting

  LCD_Data_Write(0x00); // 

  LCD_Data_Write(y);

  LCD_Data_Write(0x00);

  LCD_Data_Write(y+high-1);

  LCD_Cmd_Write(0x2c);

  for(i=0;i<high;i++)

   {

       for(j=0;j<width;j=j+24)

        {

            data = *pstr++;

for(k=0;k<2;k++)

   {

       temp = data&0xe0;

   LCD_Data_Write(LCD_Change_Tab[temp>>5]);

             data = data<<3;

           }

    data = data + ((*pstr)>>2); 

        for(k=0;k<2;k++)

         {

             temp = data&0xe0;

   LCD_Data_Write(LCD_Change_Tab[temp>>5]);

             data = data<<3;

           }

  data = data + (((*pstr++)&0x03)<<4);  

         data = data +((*pstr)>>4);

 for(k=0;k<2;k++)

      {

            temp = data&0xe0;

      LCD_Data_Write(LCD_Change_Tab[temp>>5]);

                data = data<<3;

                }

                             data = data +(((*pstr++)&0x0f)<<2);

             for(k=0;k<2;k++)

              {

                  temp = data&0xe0;

                  LCD_Data_Write(LCD_Change_Tab[temp>>5]);

                                  data = data<<3;

                }

                    }

   }

    }    

void Image18_Disp(uchar x,uchar y,uchar width,uchar high,const uchar *pstr)

// 坐標(x,y)，x為水平方向字符位（1個字符位占3個像素點）；y為垂直方向像素行；

// width：圖片寬度，按照水平方向像素點計算；high：為圖片高度，按照像素點計算，*pstr 圖片數組名

   {

  uchar i,j,k,data,temp;

  LCD_Cmd_Write(0x2a); // Column Address Setting

  LCD_Data_Write(0x00); // 

  LCD_Data_Write(x); // 

  LCD_Data_Write(0x00);

  LCD_Data_Write((width/3)+x-1); //

  LCD_Cmd_Write(0x2b); // Row Address Setting

  LCD_Data_Write(0x00); // 

  LCD_Data_Write(y);

  LCD_Data_Write(0x00);

  LCD_Data_Write(y+high-1);

  LCD_Cmd_Write(0x2c);

  for(i=0;i<high;i++)

   {

            data = *pstr++;

for(k=0;k<2;k++)

   {

       temp = data&0xe0;

   LCD_Data_Write(LCD_Change_Tab[temp>>5]);

             data = data<<3;

           }

 

    data = data + ((*pstr)>>2); 

        for(k=0;k<2;k++)

         {

             temp = data&0xe0;

   LCD_Data_Write(LCD_Change_Tab[temp>>5]);

             data = data<<3;

           }

 

data = data + (((*pstr++)&0x03)<<4);//指針

        for(k=0;k<2;k++)

         {

             temp = data&0xe0;

   LCD_Data_Write(LCD_Change_Tab[temp>>5]);

             data = data<<3;

           } 

     }

    }   

void Image8_Disp(uchar x,uchar y,uchar width,uchar high,const uchar *pstr)

// 坐標(x,y)，x為水平方向字符位（1個字符位占3個像素點）；y為垂直方向像素行；

// width：圖片寬度，按照水平方向像素點計算；high：為圖片高度，按照像素點計算，*pstr 圖片數組名

   {

  uchar i,j,k,data,temp;

  LCD_Cmd_Write(0x2a); // Column Address Setting

  LCD_Data_Write(0x00); // 

  LCD_Data_Write(x); // 

  LCD_Data_Write(0x00);

  LCD_Data_Write((width/3)+x-1); //

  LCD_Cmd_Write(0x2b); // Row Address Setting

  LCD_Data_Write(0x00); // 

  LCD_Data_Write(y);

  LCD_Data_Write(0x00);

  LCD_Data_Write(y+high-1);

  LCD_Cmd_Write(0x2c);

  for(i=0;i<high;i++)

   {

            data = *pstr++;

for(k=0;k<3;k++)

   {

       temp = data&0xe0;

   LCD_Data_Write(LCD_Change_Tab[temp>>5]);

             data = data<<3;

           }

     }

    }

/**********************LCD復位程序********************/
void LCD_Reset(void )
{
LCD_RST_OFF();
Delay_us(20);
LCD_RST_ON();
Delay_us(50);
LCD_RST_OFF();
Delay_us(20);
} 

/*************************LCD初始化***********************/
void LCD_Init(void)
{
LCD_Reset();
Delay_ms(10);
LCD_Cmd_Write(POWER_SAVE_OFF);//wake up
Delay_ms(10);
LCD_Cmd_Write(0xd7); // Disable Auto Read
LCD_Data_Write(0x9F);
LCD_Cmd_Write(0xe0);// Enable OTP Read
LCD_Data_Write(0x00);
Delay_ms(10);
LCD_Cmd_Write(0xe3); // OTP Up-Load
Delay_ms(20);
LCD_Cmd_Write(0xe1); // OTP Control Out
// initail set
LCD_Cmd_Write(0x11); // Sleep Out
LCD_Cmd_Write(0x28); // Display OFF Delay_ms(50);
LCD_Cmd_Write(0xc0); // Vop = B9h
LCD_Data_Write(0x1f); // contrast value
LCD_Data_Write(0x01); // 01
LCD_Cmd_Write(0xc3); // BIAS
LCD_Data_Write(0x02); // 05 = 1/12
LCD_Cmd_Write(0xc4); // Booster = x8
LCD_Data_Write(0x07);
LCD_Cmd_Write(0xd0); // Enable Analog Circuit
LCD_Data_Write(0x1d);
LCD_Cmd_Write(0xb5); // N-Line = 13
LCD_Data_Write(0x8d); //8d
LCD_Cmd_Write(0x38); // 4 Gray
// SdCmd(0x39); // B/W Mode
LCD_Cmd_Write(0x3a); // Enable DDRAM Interface
LCD_Data_Write(0x02);
LCD_Cmd_Write(0x36); // Dispaly Control
LCD_Data_Write(0xc8); // MY=1,MX[1:0]=11;
LCD_Cmd_Write(0xb0); // Duty Setting
LCD_Data_Write(0x9f); // 160 line 9f
LCD_Cmd_Write(0x20); // Display Inversion OFF
LCD_Cmd_Write(0xb1); // First COM out
LCD_Data_Write(0x00); // com0
LCD_Clear_RAM(0,127,0,159);
LCD_Cmd_Write(0x29); // Display ON
}
 
實際調試時一開始使用的是電源發生器的，5V標準的電壓，當時沒發現陰影，LCD是3.3V的，實際線路板上電壓大概是5.06V，結果背景就開始有陰影了，后來重新外加弄了塊5V轉3.3V的轉接線路板。

其中DIR的電平可以單獨再用一個I/O口去控制，不過一般實際使用時基本上都是WRITE LCD的，READ LCD RAM很少，如無READ指令的話，DIR可以直接接高電平。