Stm32f4 loading image

First download Embedded Resource Editor GUI from www.st.com, it will allow you to convert BMP, jpg and other to char array, and it will generate code.

Next you have to have paint bmp function, (you must know converted picture dimensions, like 320x240,  (you must resize jpg or any other file so it can fit inside screen !!!!)
After that, copy generated file to bmp.h, include that to main.c, and call paint function from LCD library

as example, i have SSD1289 with void LCD_WriteBMP(uint8_t Xpos, uint16_t Ypos, uint8_t Height, uint16_t Width, uint8_t *bitmap) function
so in main.c, i call:

LCD_WriteBMP(0,0,320,240,(u8) * Name_of_Char_array_generated_by_gui_aka_ImageBuffer);

Questions ?

(mark helpful or correct answer if it helped)

My screen is SSD2119 so does this line: void LCD_WriteBMP(uint8_t Xpos, uint16_t Ypos, uint8_t Height, uint16_t Width, uint8_t *bitmap)  still works? Or that is from a ready made h file? Also:Name_of_Char_array_generated_by_gui_aka_ImageBuffer does that mean the file name generated by that program?

I will try this hopefully by today will get back to you with the results Thanks for your time

So I did what you told me and converted an image and included it in main and wrote the following code:

int main(void)

{

  /* Initializes LCD */

  STM32f4_Discovery_LCD_Init();

  /* Clear the LCD */

  LCD_Clear(LCD_COLOR_WHITE);

  while (1) {

  LCD_WriteBMP(0, 0, 320, 240, (uint8_t*) ImageBuffer);

  delay(500);

  }

there are no errors but the image is not visible on screen

for first time use 100x100 picture, convert it to char array

Image buffer should be generated as ImageBuffer[20000]

LCD_WriteBMP(20, 20, 100, 100, (uint8_t*) ImageBuffer);

Also, make colour for LCD_Clear(GREEN) or other non stock collor

I am very sorry for all these questions but now an error has occured :Error[Pe140]: too many arguments in function call 

Hrr, i know the problem.

You must rewrite this code for your lcd driver

void Lcd_SetCursor(u16 x,u16 y)

{

    if(DeviceCode==0x8989)

    {

         Lcd_WriteReg(0x004e,y);        //Å Å

        Lcd_WriteReg(0x004f,0x13f-x);  //ÄÅ

    }

    else if(DeviceCode==0x9919)

    {

        Lcd_WriteReg(0x004e,x); // Å Å

          Lcd_WriteReg(0x004f,y); // ÄÅ    

    }

    else

    {

          Lcd_WriteReg(0x0020,y); // Å Å

          Lcd_WriteReg(0x0021,0x13f-x); // ÄÅ

    }

}

 

void Lcd_SetWindows(u16 StartX,u16 StartY,u16 EndX,u16 EndY)

{

  Lcd_SetCursor(StartX,StartY);

  Lcd_WriteReg(0x0050, StartX);

  Lcd_WriteReg(0x0052, StartY);

  Lcd_WriteReg(0x0051, EndX);

  Lcd_WriteReg(0x0053, EndY);

}

 

void Lcd_DrawPicture(u16 StartX,u16 StartY,u16 EndX,u16 EndY,u8 *pic)

{

  u16  i;

  Lcd_SetWindows(StartX,StartY,EndX,EndY);

  Lcd_SetCursor(StartX,StartY);

  u16 *bitmap_ptr = (u16 *)pic;

  Clr_Cs;

 

  Lcd_WriteIndex(0x0022);

  Set_Rs;

  for (i=0;i<(EndX*EndY);i++)

  {

      Lcd_WriteData(*bitmap_ptr++);

      Clr_nWr;Set_nWr;

  }

     

  Set_Cs;

}

note that Set_Cs, and other functions is already done by FSMC controller, so you just need to change some bits to get it working, and my old original main function will work for you as it should. And you will learn stuff by doing that

or, try this one, it is for SSD1289, but maybe that will work for you too:

void LCD_SetCursor(uint16_t Xpos, uint16_t Ypos)

{

  LCD_WriteReg(LCD_REG_78, Xpos);

  LCD_WriteReg(LCD_REG_79, Ypos);

}

 

void LCD_SetDisplayWindow(uint8_t Xpos, uint16_t Ypos, uint8_t Height, uint16_t Width)

{

  if(Xpos >= Height)

  {

    LCD_WriteReg(0x0044, (Xpos - Height +1));

  }

  else

  {

    LCD_WriteReg(0x0044, 0x0000);

  }

  if(Ypos >= Width)

  {

    LCD_WriteReg(0x0045, (Ypos - Width +1));

  } 

  else

  {

    LCD_WriteReg(0x0045, 0x0000);

  }

  LCD_WriteReg(0x0046, Ypos);

  LCD_SetCursor(Xpos, Ypos);

 

}

 

void LCD_WriteBMP(uint8_t Xpos, uint16_t Ypos, uint8_t Height, uint16_t Width, uint8_t *bitmap)

{

  volatile uint32_t index;

  uint16_t *bitmap_ptr = (uint16_t *)bitmap;

  uint32_t size;

  size=(Height * Width);

  LCD_SetDisplayWindow(Xpos, Ypos,Height, Width);

 

  LCD_WriteReg(LCD_REG_17, 0x6048);

 

  LCD_WriteRAM_Prepare();

 

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

  {

    LCD_WriteRAM(*bitmap_ptr++);

  }

  LCD_WriteReg(LCD_REG_17, 0x6028);

  LCD_SetDisplayWindow(0, 0, 239, 319);

}

I will try that tomorrow thank you very much. I believe that i have to change the name of the functions since they are already defined by another function right?

void LCD_BMP(uint8_t *bitmap)

{

  uint32_t size = 320 * 240;

  uint32_t *bitmap_ptr = (u16 *)bitmap;

  LCD_SetCursor(0x00, 0x00);

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

  for(uint32_t index=0;index<(size);index++)

  {

    LCD_Data = *bitmap_ptr++;

  }

}

just past this code to your project (in the bottom of library of lcd), and use 320x240 picture (convert without header)

LCD_BMP((uint8_t*) ImageBuffer);

I have tried the last solution that you gave me but now I have to deal with the size limit :/ I will get back to you as soon as I discover on how to save the image from SD card and load it from there

I am strugling with the same problems as you are. Probably you can save also the picture in FLASH, but you have to "tell" the compiler not to copy it to RAM. Unfortuantely I have not figured it yet how to do it.

I am strugling with the same problems as you are. Probably you can save also the picture in FLASH, but you have to "tell" the compiler not to copy it to RAM. Unfortuantely I have not figured it yet how to do it.