STM32F429 DMA2D 16bit Configuration

aksoy_otomasyon · ‎2015-09-10

Posted on September 10, 2015 at 10:17

Hello,

I am working on Hal library. I developed new board for my project. There is a 4.3'' TFT.

I use STM32F429_EVAL board example software. SDRAM and TFT are ok. They are working without problem. However, when i use fillrect or ClearLCD functions, they dont work because of DMA2D library. Because this library consist of 24bit color format. I tried but i could not handle it.

Shortly, How can i change DMA2D library as 16bit colour format.

I edited some parameter. For example , I edited RGB_565,

void BSP_LCD_DrawHLine(uint16_t Xpos, uint16_t Ypos, uint16_t Length) {

uint32_t Xaddress = 0;

/* Get the line address */

//Xaddress = (hltdc_eval.LayerCfg[ActiveLayer].FBStartAdress) + 4*(BSP_LCD_GetXSize()*Ypos + Xpos); // original

Xaddress = (hltdc_eval.LayerCfg[ActiveLayer].FBStartAdress) + 2 * (BSP_LCD_GetXSize()*Ypos + Xpos); // I changed as a 16bit

/* Write line */

LL_FillBuffer(ActiveLayer, (uint32_t *)Xaddress, Length, 1, 0, DrawProp[ActiveLayer].TextColor);

}

tmp1 = pdata & DMA2D_OCOLR_ALPHA_1;

tmp2 = pdata & DMA2D_OCOLR_RED_2;

tmp3 = pdata & DMA2D_OCOLR_GREEN_2;

tmp4 = pdata & DMA2D_OCOLR_BLUE_2;

etc.

Can you help me anyone.

Best.

Mustafa.

Nickname5522_O · ‎2015-09-16

Posted on September 16, 2015 at 19:02

Hi aksoy.mustafa,

1-STM32F429 EVAL boardis using 32 bitcolor format (ARGB8888) and not 24 bit color format. 2-If you want to change the color format to 16 bit , you shouldmodify thedriver stm324x9i_eval_lcd.c: -Replace inside LL_ConvertLineToARGB8888() and LL_FillBuffer() functions

hdma2d_eval.Init.ColorMode = DMA2D_ARGB8888;

by

hdma2d_eval.Init.ColorMode = DMA2D_RGB565;

-Also, inside BSP_LCD_LayerDefaultInit() functionreplace

Layercfg.PixelFormat = LTDC_PIXEL_FORMAT_ARGB8888;

by

Layercfg.PixelFormat = LTDC_PIXEL_FORMAT_RGB565;

-And by analogy replace all macros that refer to 32 bit color format by those which refer to 16 bit. -Shahrzad-