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/******************** (C) COPYRIGHT 2008 STMicroelectronics ********************

* File Name          : lcd.c

* Author             : MCD Application Team

* Version            : VX.Y.Z

* Date               : mm/dd/yyyy

* Description        : This file includes the LCD driver for AM-240320L8TNQW00H

*                      (LCD_ILI9320) Liquid Crystal Display Module of STM3210D-EVAL

*                      board.

********************************************************************************

* THE PRESENT SOFTWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS

* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME.

* AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT,

* INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE

* CONTENT OF SUCH SOFTWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING

* INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.

*******************************************************************************/

/* Includes ------------------------------------------------------------------*/

#include "FreeRTOS.h"

#include "task.h"

#include    <stdio.h>

#include    <string.h>

#include    <ctype.h>

#include    <stdlib.h>

#include    <stdarg.h>

#include    <stm32f10x_conf.h>

#include    <stm32f10x_lib.h>

#include    "STM3210D_lcd.h"

#include        "fonts.h"

extern void timerDly(unsigned int);

/* Private typedef -----------------------------------------------------------*/

/* Private define ------------------------------------------------------------*/

#define START_BYTE      0x70

#define SET_INDEX       0x00

#define READ_STATUS     0x01

#define LCD_WRITE_REG   0x02

#define LCD_READ_REG    0x03

/* Private macro -------------------------------------------------------------*/

/* Private variables ---------------------------------------------------------*/

  /* Global variables to set the written text color */

static  vu16 TextColor = 0x0000, BackColor = 0xFFFF;

/* Private function prototypes -----------------------------------------------*/

/* Private functions ---------------------------------------------------------*/

#define timerDly( x )   vTaskDelay( ( x * 10 ) / portTICK_RATE_MS );

#define vBlockToWait( x )

/*******************************************************************************

* Function Name  : LCD_Setup

* Description    : Setups the LCD.

* Input          : None

* Output         : None

* Return         : None

*******************************************************************************/

void LCD_Setup(void)

{

/* Configure the LCD Control pins --------------------------------------------*/

  LCD_CtrlLinesConfig();

/* Configure the SPI3 interface ----------------------------------------------*/

  LCD_SPIConfig();

  timerDly(5); /* Delay 50 ms */

  /* Start Initial Sequence ------------------------------------------------*/

  LCD_WriteReg(R229, 0x8000); /* Set the internal vcore voltage */

  LCD_WriteReg(R0,  0x0001); /* Start internal OSC. */

  LCD_WriteReg(R1,  0x0100); /* set SS and SM bit */

  LCD_WriteReg(R2,  0x0700); /* set 1 line inversion */

  LCD_WriteReg(R3,  0x1030); /* set GRAM write direction and BGR=1. */

  LCD_WriteReg(R4,  0x0000); /* Resize register */

  LCD_WriteReg(R8,  0x0202); /* set the back porch and front porch */

  LCD_WriteReg(R9,  0x0000); /* set non-display area refresh cycle ISC[3:0] */

  LCD_WriteReg(R10, 0x0000); /* FMARK function */

  LCD_WriteReg(R12, 0x0000); /* RGB interface setting */

  LCD_WriteReg(R13, 0x0000); /* Frame marker Position */

  LCD_WriteReg(R15, 0x0000); /* RGB interface polarity */

  /* Power On sequence -----------------------------------------------------*/

  LCD_WriteReg(R16, 0x0000); /* SAP, BT[3:0], AP, DSTB, SLP, STB */

  LCD_WriteReg(R17, 0x0000); /* DC1[2:0], DC0[2:0], VC[2:0] */

  LCD_WriteReg(R18, 0x0000); /* VREG1OUT voltage */

  LCD_WriteReg(R19, 0x0000); /* VDV[4:0] for VCOM amplitude */

  timerDly(20);                 /* Dis-charge capacitor power voltage (200ms) */

  LCD_WriteReg(R16, 0x17B0); /* SAP, BT[3:0], AP, DSTB, SLP, STB */

  LCD_WriteReg(R17, 0x0137); /* DC1[2:0], DC0[2:0], VC[2:0] */

  timerDly(5);                  /* Delay 50 ms */

  LCD_WriteReg(R18, 0x0139); /* VREG1OUT voltage */

  timerDly(5);                  /* Delay 50 ms */

  LCD_WriteReg(R19, 0x1d00); /* VDV[4:0] for VCOM amplitude */

  LCD_WriteReg(R41, 0x0013); /* VCM[4:0] for VCOMH */

  timerDly(5);                  /* Delay 50 ms */

  LCD_WriteReg(R32, 0x0000); /* GRAM horizontal Address */

  LCD_WriteReg(R33, 0x0000); /* GRAM Vertical Address */

  /* Adjust the Gamma Curve ------------------------------------------------*/

  LCD_WriteReg(R48, 0x0006);

  LCD_WriteReg(R49, 0x0101);

  LCD_WriteReg(R50, 0x0003);

  LCD_WriteReg(R53, 0x0106);

  LCD_WriteReg(R54, 0x0b02);

  LCD_WriteReg(R55, 0x0302);

  LCD_WriteReg(R56, 0x0707);

  LCD_WriteReg(R57, 0x0007);

  LCD_WriteReg(R60, 0x0600);

  LCD_WriteReg(R61, 0x020b);

  /* Set GRAM area ---------------------------------------------------------*/

  LCD_WriteReg(R80, 0x0000); /* Horizontal GRAM Start Address */

  LCD_WriteReg(R81, 0x00EF); /* Horizontal GRAM End Address */

  LCD_WriteReg(R82, 0x0000); /* Vertical GRAM Start Address */

  LCD_WriteReg(R83, 0x013F); /* Vertical GRAM End Address */

  LCD_WriteReg(R96,  0x2700); /* Gate Scan Line */

  LCD_WriteReg(R97,  0x0001); /* NDL,VLE, REV */

  LCD_WriteReg(R106, 0x0000); /* set scrolling line */

  /* Partial Display Control -----------------------------------------------*/

  LCD_WriteReg(R128, 0x0000);

  LCD_WriteReg(R129, 0x0000);

  LCD_WriteReg(R130, 0x0000);

  LCD_WriteReg(R131, 0x0000);

  LCD_WriteReg(R132, 0x0000);

  LCD_WriteReg(R133, 0x0000);

  /* Panel Control ---------------------------------------------------------*/

  LCD_WriteReg(R144, 0x0010);

  LCD_WriteReg(R146, 0x0000);

  LCD_WriteReg(R147, 0x0003);

  LCD_WriteReg(R149, 0x0110);

  LCD_WriteReg(R151, 0x0000);

  LCD_WriteReg(R152, 0x0000);

  /* Set GRAM write direction and BGR = 1 */

  /* I/D=01 (Horizontal : increment, Vertical : decrement) */

  /* AM=1 (address is updated in vertical writing direction) */

  LCD_WriteReg(R3, 0x1018);

  LCD_WriteReg(R7, 0x0173); /* 262K color and display ON */

}

/*******************************************************************************

* Function Name  : STM3210D_LCD_Init

* Description    : Initializes the LCD.

* Input          : None

* Output         : None

* Return         : None

*******************************************************************************/

void STM3210D_LCD_Init(void)

{

  /* Setups the LCD */

  LCD_Setup();

}

/*******************************************************************************

* Function Name  : LCD_SetTextColor

* Description    : Sets the Text color.

* Input          : - Color: specifies the Text color code RGB(5-6-5).

* Output         : - TextColor: Text color global variable used by LCD_DrawChar

*                  and LCD_DrawPicture functions.

* Return         : None

*******************************************************************************/

void LCD_SetTextColor(vu16 Color)

{

  TextColor = Color;

}

/*******************************************************************************

* Function Name  : LCD_SetBackColor

* Description    : Sets the Background color.

* Input          : - Color: specifies the Background color code RGB(5-6-5).

* Output         : - BackColor: Background color global variable used by

*                  LCD_DrawChar and LCD_DrawPicture functions.

* Return         : None

*******************************************************************************/

void LCD_SetBackColor(vu16 Color)

{

  BackColor = Color;

}

/*******************************************************************************

* Function Name  : LCD_ClearLine

* Description    : Clears the selected line.

* Input          : - Line: the Line to be cleared.

*                    This parameter can be one of the following values:

*                       - Linex: where x can be 0..9

* Output         : None

* Return         : None

*******************************************************************************/

void LCD_ClearLine(u8 Line)

{

  LCD_DisplayStringLine(Line, ( unsigned char * ) "                    ");

}

/*******************************************************************************

* Function Name  : LCD_Clear

* Description    : Clears the hole LCD.

* Input          : Color: the color of the background.

* Output         : None

* Return         : None

*******************************************************************************/

void LCD_Clear(u16 Color)

{

  vu32 index = 0;

  LCD_SetCursor(0x00, 0x013F);

  LCD_WriteRAM_Prepare(); /* Prepare to write GRAM */

  for(index = 0; index < 76800; index++)

  {

    LCD_WriteRAM(Color);

  }

  LCD_CtrlLinesWrite(GPIOB, CtrlPin_NCS, Bit_SET);

}

/*******************************************************************************

* Function Name  : LCD_SetCursor

* Description    : Sets the cursor position.

* Input          : - Xpos: specifies the X position.

*                  - Ypos: specifies the Y position.

* Output         : None

* Return         : None

*******************************************************************************/

void LCD_SetCursor(u8 Xpos, u16 Ypos)

{

 LCD_WriteReg(R32, Xpos);

 LCD_WriteReg(R33, Ypos);

}

/*******************************************************************************

* Function Name  : LCD_DrawChar

* Description    : Draws a character on LCD.

* Input          : - Xpos: the Line where to display the character shape.

*                    This parameter can be one of the following values:

*                       - Linex: where x can be 0..9

*                  - Ypos: start column address.

*                  - c: pointer to the character data.

* Output         : None

* Return         : None

*******************************************************************************/

void LCD_DrawChar(u8 Xpos, u16 Ypos, uc16 *c)

{

  vu32 index = 0, i = 0;

  vu8 Xaddress = 0;

  Xaddress = Xpos;

  LCD_SetCursor(Xaddress, Ypos);

  for(index = 0; index < 24; index++)

  {

    LCD_WriteRAM_Prepare(); /* Prepare to write GRAM */

    for(i = 0; i < 16; i++)

    {

      if((c[index] & (1 << i)) == 0x00)

      {

        LCD_WriteRAM(BackColor);

      }

      else

      {

        LCD_WriteRAM(TextColor);

      }

    }

    LCD_CtrlLinesWrite(GPIOB, CtrlPin_NCS, Bit_SET);

    Xaddress++;

    LCD_SetCursor(Xaddress, Ypos);

  }

}

/*******************************************************************************

* Function Name  : LCD_DisplayChar

* Description    : Displays one character (16dots width, 24dots height).

* Input          : - Line: the Line where to display the character shape .

*                    This parameter can be one of the following values:

*                       - Linex: where x can be 0..9

*                  - Column: start column address.

*                  - Ascii: character ascii code, must be between 0x20 and 0x7E.

* Output         : None

* Return         : None

*******************************************************************************/

void LCD_DisplayChar(u8 Line, u16 Column, u8 Ascii)

{

  Ascii -= 32;

  LCD_DrawChar(Line, Column, &ASCII_Table[Ascii * 24]);

}

/*******************************************************************************

* Function Name  : LCD_DisplayStringLine

* Description    : Displays a maximum of 20 char on the LCD.

* Input          : - Line: the Line where to display the character shape .

*                    This parameter can be one of the following values:

*                       - Linex: where x can be 0..9

*                  - *ptr: pointer to string to display on LCD.

* Output         : None

* Return         : None

*******************************************************************************/

void LCD_DisplayStringLine(u8 Line, u8 *ptr)

{

  vu32 i = 0;

  vu16 refcolumn = 319;

  /* Send the string character by character on lCD */

  while ((*ptr != 0) & (i < 20))

  {

    /* Display one character on LCD */

    LCD_DisplayChar(Line, refcolumn, *ptr);

    /* Decrement the column position by 16 */

    refcolumn -= 16;

    /* Point on the next character */

    ptr++;

    /* Increment the character counter */

    i++;

  }

}

/*******************************************************************************

* Function Name  : LCD_SetDisplayWindow

* Description    : Sets a display window

* Input          : - Xpos: specifies the X buttom left position.

*                  - Ypos: specifies the Y buttom left position.

*                  - Height: display window height.

*                  - Width: display window width.

* Output         : None

* Return         : None

*******************************************************************************/

void LCD_SetDisplayWindow(u8 Xpos, u16 Ypos, u8 Height, u16 Width)

{

  /* Horizontal GRAM Start Address */

  if(Xpos >= Height)

  {

    LCD_WriteReg(R80, (Xpos - Height + 1));

  }

  else

  {

    LCD_WriteReg(R80, 0);

  }

  /* Horizontal GRAM End Address */

  LCD_WriteReg(R81, Xpos);

  /* Vertical GRAM Start Address */

  if(Ypos >= Width)

  {

    LCD_WriteReg(R82, (Ypos - Width + 1));

  }

  else

  {

    LCD_WriteReg(R82, 0);

  }

  /* Vertical GRAM End Address */

  LCD_WriteReg(R83, Ypos);

  LCD_SetCursor(Xpos, Ypos);

}

/*******************************************************************************

* Function Name  : LCD_WindowModeDisable

* Description    : Disables LCD Window mode.

* Input          : None

* Output         : None

* Return         : None

*******************************************************************************/

void LCD_WindowModeDisable(void)

{

  LCD_SetDisplayWindow(239, 0x13F, 240, 320);

  LCD_WriteReg(R3, 0x1018);

}

/*******************************************************************************

* Function Name  : LCD_DrawLine

* Description    : Displays a line.

* Input          : - Xpos: specifies the X position.

*                  - Ypos: specifies the Y position.

*                  - Length: line length.

*                  - Direction: line direction.

*                    This parameter can be one of the following values: Vertical

*                    or Horizontal.

* Output         : None

* Return         : None

*******************************************************************************/

void LCD_DrawLine(u8 Xpos, u16 Ypos, u16 Length, u8 Direction)

{

  u32 i = 0;

  LCD_SetCursor(Xpos, Ypos);

  if(Direction == Horizontal)

  {

    LCD_WriteRAM_Prepare(); /* Prepare to write GRAM */

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

    {

      LCD_WriteRAM(TextColor);

    }

    LCD_CtrlLinesWrite(GPIOB, CtrlPin_NCS, Bit_SET);

  }

  else

  {

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

    {

      LCD_WriteRAMWord(TextColor);

      Xpos++;

      LCD_SetCursor(Xpos, Ypos);

    }

  }

}

/*******************************************************************************

* Function Name  : LCD_DrawRect

* Description    : Displays a rectangle.

* Input          : - Xpos: specifies the X position.

*                  - Ypos: specifies the Y position.

*                  - Height: display rectangle height.

*                  - Width: display rectangle width.

* Output         : None

* Return         : None

*******************************************************************************/

void LCD_DrawRect(u8 Xpos, u16 Ypos, u8 Height, u16 Width)

{

  LCD_DrawLine(Xpos, Ypos, Width, Horizontal);

  LCD_DrawLine((Xpos + Height), Ypos, Width, Horizontal);

  LCD_DrawLine(Xpos, Ypos, Height, Vertical);

  LCD_DrawLine(Xpos, (Ypos - Width + 1), Height, Vertical);

}

/*******************************************************************************

* Function Name  : LCD_DrawCircle

* Description    : Displays a circle.

* Input          : - Xpos: specifies the X position.

*                  - Ypos: specifies the Y position.

*                  - Height: display rectangle height.

*                  - Width: display rectangle width.

* Output         : None

* Return         : None

*******************************************************************************/

void LCD_DrawCircle(u8 Xpos, u16 Ypos, u16 Radius)

{

  s32  D;/* Decision Variable */

  u32  CurX;/* Current X Value */

  u32  CurY;/* Current Y Value */

  D = 3 - (Radius << 1);

  CurX = 0;

  CurY = Radius;

  while (CurX <= CurY)

  {

    LCD_SetCursor(Xpos + CurX, Ypos + CurY);

    LCD_WriteRAMWord(TextColor);

    LCD_SetCursor(Xpos + CurX, Ypos - CurY);

    LCD_WriteRAMWord(TextColor);

    LCD_SetCursor(Xpos - CurX, Ypos + CurY);

    LCD_WriteRAMWord(TextColor);

    LCD_SetCursor(Xpos - CurX, Ypos - CurY);

    LCD_WriteRAMWord(TextColor);

    LCD_SetCursor(Xpos + CurY, Ypos + CurX);

    LCD_WriteRAMWord(TextColor);

    LCD_SetCursor(Xpos + CurY, Ypos - CurX);

    LCD_WriteRAMWord(TextColor);

    LCD_SetCursor(Xpos - CurY, Ypos + CurX);

    LCD_WriteRAMWord(TextColor);

    LCD_SetCursor(Xpos - CurY, Ypos - CurX);

    LCD_WriteRAMWord(TextColor);

    if (D < 0)

    {

      D += (CurX << 2) + 6;

    }

    else

    {

      D += ((CurX - CurY) << 2) + 10;

      CurY--;

    }

    CurX++;

  }

}

/*******************************************************************************

* Function Name  : LCD_DrawMonoPict

* Description    : Displays a monocolor picture.

* Input          : - Pict: pointer to the picture array.

* Output         : None

* Return         : None

*******************************************************************************/

void LCD_DrawMonoPict(uc32 *Pict)

{

  u32 index = 0, i = 0;

  LCD_SetCursor(0, 319);

  LCD_WriteRAM_Prepare(); /* Prepare to write GRAM */

  for(index = 0; index < 2400; index++)

  {

    for(i = 0; i < 32; i++)

    {

      if((Pict[index] & (1 << i)) == 0x00)

      {

        LCD_WriteRAM(BackColor);

      }

      else

      {

        LCD_WriteRAM(TextColor);

      }

    }

  }

  LCD_CtrlLinesWrite(GPIOB, CtrlPin_NCS, Bit_SET);

}

///*******************************************************************************

//* Function Name  : LCD_DrawBMP

//* Description    : Displays a bitmap picture loaded in the SPI Flash.

//* Input          : - BmpAddress: Bmp picture address in the SPI Flash.

//* Output         : None

//* Return         : None

//*******************************************************************************/

//void LCD_DrawBMP(u32 BmpAddress)

//{

//  u32 i = 0, size = 0;

//

//  /* Read bitmap size */

//  SPI_FLASH_BufferRead((u8*)&size, BmpAddress + 2, 4);

//

//  /* get bitmap data address offset */

//  SPI_FLASH_BufferRead((u8*)&i, BmpAddress + 10, 4);

//

//  size = (size - i)/2;

//

//  SPI_FLASH_StartReadSequence(BmpAddress + i);

//

//  /* Disable SPI1  */

//  SPI_Cmd(SPI1, DISABLE);

//  /* SPI in 16-bit mode */

//  SPI_DataSizeConfig(SPI1, SPI_DataSize_16b);

//

//  /* Enable SPI1  */

//  SPI_Cmd(SPI1, ENABLE);

//

//  /* Set GRAM write direction and BGR = 1 */

//  /* I/D=00 (Horizontal : decrement, Vertical : decrement) */

//  /* AM=1 (address is updated in vertical writing direction) */

//  LCD_WriteReg(R3, 0x1008);

//

//  LCD_WriteRAM_Prepare(); /* Prepare to write GRAM */

//

//  /* Read bitmap data from SPI Flash and send them to LCD */

//  for(i = 0; i < size; i++)

//  {

//    LCD_WriteRAM(__REV_HalfWord(SPI_FLASH_SendHalfWord(0xA5A5)));

//  }

//

//  LCD_CtrlLinesWrite(GPIOB, CtrlPin_NCS, Bit_SET);

//

//  /* Deselect the FLASH: Chip Select high */

//  SPI_FLASH_CS_HIGH();

//

//  /* Disable SPI1  */

//  SPI_Cmd(SPI1, DISABLE);

//  /* SPI in 8-bit mode */

//  SPI_DataSizeConfig(SPI1, SPI_DataSize_8b);

//

//  /* Enable SPI1  */

//  SPI_Cmd(SPI1, ENABLE);

//

//  /* Set GRAM write direction and BGR = 1 */

//  /* I/D = 01 (Horizontal : increment, Vertical : decrement) */

//  /* AM = 1 (address is updated in vertical writing direction) */

//  LCD_WriteReg(R3, 0x1018);

//}

/*******************************************************************************

* Function Name  : LCD_DrawBMP

* Description    : Displays a bitmap picture loaded in the SPI Flash.

* Input          : - BmpAddress: Bmp picture address in the SPI Flash.

* Output         : None

* Return         : None

*******************************************************************************/

void LCD_DrawBMP(uc16 *BmpAddress)

{

  u32 i = 0, size = 0;

  /* Read bitmap size */

  size = BmpAddress[1] | (BmpAddress[2] << 16);

  /* get bitmap data address offset */

  i = BmpAddress[5] | (BmpAddress[6] << 16);

  size = (size - i)/2;

  BmpAddress += i/2;

  /* Set GRAM write direction and BGR = 1 */

  /* I/D=00 (Horizontal : decrement, Vertical : decrement) */

  /* AM=1 (address is updated in vertical writing direction) */

  LCD_WriteReg(R3, 0x1008);

  LCD_WriteRAM_Prepare(); /* Prepare to write GRAM */

  /* Read bitmap data from SPI Flash and send them to LCD */

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

  {

    LCD_WriteRAM(BmpAddress[i]);

  }

  LCD_CtrlLinesWrite(GPIOB, CtrlPin_NCS, Bit_SET);

  /* Set GRAM write direction and BGR = 1 */

  /* I/D = 01 (Horizontal : increment, Vertical : decrement) */

  /* AM = 1 (address is updated in vertical writing direction) */

  LCD_WriteReg(R3, 0x1018);

}

/*******************************************************************************

* Function Name  : LCD_nCS_StartByte

* Description    : Reset LCD control line(/CS) and Send Start-Byte

* Input          : - Start_Byte: the Start-Byte to be sent

* Output         : None

* Return         : None

*******************************************************************************/

void LCD_nCS_StartByte(u8 Start_Byte)

{

  LCD_CtrlLinesWrite(GPIOB, CtrlPin_NCS, Bit_RESET);

  SPI_I2S_SendData(SPI3, Start_Byte);

  while(SPI_I2S_GetFlagStatus(SPI3, SPI_I2S_FLAG_BSY) != RESET)

  {

        vBlockToWait( 1 );

  }

}

/*******************************************************************************

* Function Name  : LCD_WriteRegIndex

* Description    : Writes index to select the LCD register.

* Input          : - LCD_Reg: address of the selected register.

* Output         : None

* Return         : None

*******************************************************************************/

void LCD_WriteRegIndex(u8 LCD_Reg)

{

  /* Reset LCD control line(/CS) and Send Start-Byte */

  LCD_nCS_StartByte(START_BYTE | SET_INDEX);

  /* Write 16-bit Reg Index (High Byte is 0) */

  SPI_I2S_SendData(SPI3, 0x00);

  while(SPI_I2S_GetFlagStatus(SPI3, SPI_I2S_FLAG_BSY) != RESET)

  {

        vBlockToWait( 1 );

  }

  SPI_I2S_SendData(SPI3, LCD_Reg);

  while(SPI_I2S_GetFlagStatus(SPI3, SPI_I2S_FLAG_BSY) != RESET)

  {

        vBlockToWait( 1 );

  }

  LCD_CtrlLinesWrite(GPIOB, CtrlPin_NCS, Bit_SET);

}

/*******************************************************************************

* Function Name  : LCD_ReadReg

* Description    : Reads the selected LCD Register.

* Input          : None

* Output         : None

* Return         : LCD Register Value.

*******************************************************************************/

u16 LCD_ReadReg(u8 LCD_Reg)

{

  vu16 tmp = 0;

  vu8 i = 0;

  /* SPI3 prescaler: 4 */

  SPI3->CR1 &= 0xFFC7;

  SPI3->CR1 |= 0x0008;

  /* Write 16-bit Index (then Read Reg) */

  LCD_WriteRegIndex(LCD_Reg);

  /* Read 16-bit Reg */

  /* Reset LCD control line(/CS) and Send Start-Byte */

  LCD_nCS_StartByte(START_BYTE | LCD_READ_REG);

  for(i = 0; i < 5; i++)

  {

    SPI_I2S_SendData(SPI3, 0xFF);

    while(SPI_I2S_GetFlagStatus(SPI3, SPI_I2S_FLAG_BSY) != RESET)

    {

                vBlockToWait( 1 );

    }

    /* One byte of invalid dummy data read after the start byte */

    while(SPI_I2S_GetFlagStatus(SPI3, SPI_I2S_FLAG_RXNE) == RESET)

    {

                vBlockToWait( 1 );

    }

    SPI_I2S_ReceiveData(SPI3);

  }

  SPI_I2S_SendData(SPI3, 0xFF);

  /* Read upper byte */

  while(SPI_I2S_GetFlagStatus(SPI3, SPI_I2S_FLAG_BSY) != RESET)

  {

        vBlockToWait( 1 );

  }

  /* Read lower byte */

  while(SPI_I2S_GetFlagStatus(SPI3, SPI_I2S_FLAG_RXNE) == RESET)

  {

        vBlockToWait( 1 );

  }

  tmp = SPI_I2S_ReceiveData(SPI3);

  SPI_I2S_SendData(SPI3, 0xFF);

  while(SPI_I2S_GetFlagStatus(SPI3, SPI_I2S_FLAG_BSY) != RESET)

  {

        vBlockToWait( 1 );

  }

  /* Read lower byte */

  while(SPI_I2S_GetFlagStatus(SPI3, SPI_I2S_FLAG_RXNE) == RESET)

  {

        vBlockToWait( 1 );

  }

  tmp = ((tmp & 0xFF) << 8) | SPI_I2S_ReceiveData(SPI3);