u32 i = 0, length = 0, x = 0;
  u16 refcolumn = 319;

  /* Get the string length */
  length = StrLength(ptr);

  while(1)
  {
    /* 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++;
    }

    Delay(10);

    i = 0;
    ptr -= length;
    x++;
    if(refcolumn < 16)
    {
      x = 0;
    }

    refcolumn = 319 - (x * 16);
  }
}

/*******************************************************************************
* 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)
{
  LCD_WriteReg(R1, 0xD0);
  LCD_WriteReg(R5, 0x14);

  LCD_WriteReg(R69, (Xpos - Height + 1));
  LCD_WriteReg(R70, Xpos);

  LCD_WriteReg(R71, (((Ypos - Width + 1) & 0x100)>> 8));
  LCD_WriteReg(R72, ((Ypos - Width + 1) & 0xFF));

  LCD_WriteReg(R73, ((Ypos & 0x100)>> 8));
  LCD_WriteReg(R74, (Ypos & 0xFF));

  LCD_SetCursor(Xpos, Ypos);
}

/*******************************************************************************
* 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)
  {
    for(i = 0; i < Length; i++)
    {
      LCD_WriteRAM(TextColor);
    }
  }
  else
  {
   for(i = 0; i < Length; i++)
    {

      LCD_WriteRAM(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_WriteRAM(TextColor);
    LCD_SetCursor(Xpos + CurX, Ypos - CurY);
    LCD_WriteRAM(TextColor);
    LCD_SetCursor(Xpos - CurX, Ypos + CurY);
    LCD_WriteRAM(TextColor);
    LCD_SetCursor(Xpos - CurX, Ypos - CurY);
    LCD_WriteRAM(TextColor);
    LCD_SetCursor(Xpos + CurY, Ypos + CurX);
    LCD_WriteRAM(TextColor);
    LCD_SetCursor(Xpos + CurY, Ypos - CurX);
    LCD_WriteRAM(TextColor);
    LCD_SetCursor(Xpos - CurY, Ypos + CurX);
    LCD_WriteRAM(TextColor);
    LCD_SetCursor(Xpos - CurY, Ypos - CurX);
    LCD_WriteRAM(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);

  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);
      }
    }
  }
}

/*******************************************************************************
* Function Name  : LCD_WriteReg
* Description    : Writes to the selected LCD register.
* Input          : - LCD_Reg: address of the selected register.
*                  - LCD_RegValue: value to write to the selected register.
* Output         : None
* Return         : None
*******************************************************************************/
void LCD_WriteReg(u8 LCD_Reg, u8 LCD_RegValue)
{
  u16 tmp = 0;

  LCD_CtrlLinesWrite(GPIOD, CtrlPin_NWR, Bit_RESET);
  LCD_CtrlLinesWrite(GPIOD, CtrlPin_RS, Bit_RESET);
  LCD_CtrlLinesWrite(GPIOB, CtrlPin_NCS, Bit_RESET);

  tmp = LCD_Reg << 8;
  tmp |= LCD_RegValue;

  SPI_SendData(SPI2, tmp);
  while(SPI_GetFlagStatus(SPI2, SPI_FLAG_TXE) == RESET)
  {
  }

  LCD_CtrlLinesWrite(GPIOB, CtrlPin_NCS, Bit_SET);
}

/*******************************************************************************
* Function Name  : LCD_WriteRAM
* Description    : Writes to the LCD RAM.
* Input          : - RGB_Code: the pixel color in RGB mode (5-6-5).
* Output         : None
* Return         : None
*******************************************************************************/
void LCD_WriteRAM(u16 RGB_Code)
{
  LCD_CtrlLinesWrite(GPIOD, CtrlPin_NWR, Bit_RESET);
  LCD_CtrlLinesWrite(GPIOD, CtrlPin_RS, Bit_SET);
  LCD_CtrlLinesWrite(GPIOB, CtrlPin_NCS, Bit_RESET);

  SPI_SendData(SPI2, RGB_Code);
  while(SPI_GetFlagStatus(SPI2, SPI_FLAG_TXE) == RESET)
  {
  }

  LCD_CtrlLinesWrite(GPIOB, CtrlPin_NCS, Bit_SET);
}

/*******************************************************************************
* Function Name  : LCD_PowerOn
* Description    : Power on the LCD.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void LCD_PowerOn(void)
{
  /* Power On Set */
  LCD_WriteReg(R28, 0x73);
  LCD_WriteReg(R36, 0x74);
  LCD_WriteReg(R30, 0x01);
  LCD_WriteReg(R24, 0xC1);
  Delay(1); /* Delay 10 ms */
  LCD_WriteReg(R24, 0xE1);
  LCD_WriteReg(R24, 0xF1);
  Delay(6); /* Delay 60 ms */
  LCD_WriteReg(R24, 0xF5);
  Delay(6); /* Delay 60 ms */
  LCD_WriteReg(R27, 0x09);
  Delay(1); /* Delay 10 ms */
  LCD_WriteReg(R31, 0x11);
  LCD_WriteReg(R32, 0x0E);
  LCD_WriteReg(R30, 0x81);
  Delay(1); /* Delay 10 ms */
}

/*******************************************************************************
* Function Name  : LCD_DisplayOn
* Description    : Enables the Display.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void LCD_DisplayOn(void)
{
  LCD_WriteReg(R1, 0x50);
  LCD_WriteReg(R5, 0x04);

  /* Display On */
  LCD_WriteReg(R0, 0x80);
  LCD_WriteReg(R59, 0x01);
  Delay(4);                 /* Delay 40 ms */
  LCD_WriteReg(R0, 0x20);
}

/*******************************************************************************
* Function Name  : LCD_DisplayOff
* Description    : Disables the Display.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void LCD_DisplayOff(void)
{
  /* Display Off */
  LCD_WriteReg(R0, 0xA0);
  Delay(4);                 /* Delay 40 ms */
  LCD_WriteReg(R59, 0x00);
}

/*******************************************************************************
* Function Name  : LCD_CtrlLinesConfig
* Description    : Configures LCD control lines in Output Push-Pull mode.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void LCD_CtrlLinesConfig(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;

  /* Configure NCS (PB.02) in Output Push-Pull mode */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
  GPIO_Init(GPIOB, &GPIO_InitStructure);

  /* Configure NWR(RNW), RS (PD.15, PD.07) in Output Push-Pull mode */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7 | GPIO_Pin_15;
  GPIO_Init(GPIOD, &GPIO_InitStructure);
}

/*******************************************************************************
* Function Name  : LCD_CtrlLinesWrite
* Description    : Sets or reset LCD control lines.
* Input          : - GPIOx: where x can be B or D to select the GPIO peripheral.
*                  - CtrlPins: the Control line. This parameter can be:
*                       - CtrlPin_NCS: Chip Select pin (PB.02)
*                       - CtrlPin_NWR: Read/Write Selection pin (PD.15)
*                       - CtrlPin_RS: Register/RAM Selection pin (PD.07)
*                  - BitVal: specifies the value to be written to the selected bit.
*                    This parameter can be:
*                       - Bit_RESET: to clear the port pin
*                       - Bit_SET: to set the port pin
* Output         : None
* Return         : None
*******************************************************************************/
void LCD_CtrlLinesWrite(GPIO_TypeDef* GPIOx, u16 CtrlPins, BitAction BitVal)
{
  /* Set or Reset the control line */
  GPIO_WriteBit(GPIOx, CtrlPins, BitVal);
}

/*******************************************************************************
* Function Name  : LCD_SPIConfig
* Description    : Configures the SPI2 interface.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void LCD_SPIConfig(void)
{
  SPI_InitTypeDef    SPI_InitStructure;
  GPIO_InitTypeDef   GPIO_InitStructure;

  /* Enable GPIOA clock */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);

  /* Enable SPI2 clock  */
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2, ENABLE);

  /* Configure SPI2 pins: NSS, SCK, MISO and MOSI */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12 | GPIO_Pin_13 | GPIO_Pin_14 | GPIO_Pin_15;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
  GPIO_Init(GPIOB, &GPIO_InitStructure);

  /* SPI2 Config */
  SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
  SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
  SPI_InitStructure.SPI_DataSize = SPI_DataSize_16b;
  SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low;
  SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge;
  SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
  SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_2;
  SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
  SPI_Init(SPI2, &SPI_InitStructure);

  /* SPI2 enable */
  SPI_Cmd(SPI2, ENABLE);
}

/*******************************************************************************
* Function Name  : StrLength
* Description    : Returns length of string.
* Input          : - Str: Character Pointer.
* Output         : None
* Return         : String length.
*******************************************************************************/
static u32 StrLength(u8 *Str)
{
  u32 Index = 0;

  /* Increment the Index unless the end of string */
  for(Index = 0; *Str != '\0'; Str++, Index++)
  {
  }

  return Index;
}

/******************* (C) COPYRIGHT 2007 STMicroelectronics *****END OF FILE****/