Posted on July 12, 2016 at 20:42Hi Hannibal,
I ported the project you referenced to to the discovery board and the Nucleo board. On the discovery board the project works fine and on the Nucleo works fine if I run the same code and perform the mem to mem copy to sram buffer, when i try to do the memory copy directly to the FMC mapped LCD directly the DMA2D transfer only transfers the first 64K bytes which is my problem. I have been able to port the demonstrations over using the provided examples without an issue (blending and such) but all images are small and under 64K it is only when I have images over 64K that I see the problem and only with the FMC 8080 interface. I have used multiple 8080 interface chips RAIO, SSD1289, SSD1936 and they all seem to exhibit the same behavior. Below is the code that runs to the sram buffer without issues and when I try to replace the sram buffer with the LCD mapped address I see the issue. I thought it was a cache problem, but I already have the MPU set for the LCD mapped region.
static void DMA2D_Test2(void)
{
/*##-1- Configure the DMA2D Mode, Color Mode and output offset #############*/
Dma2dHandle.Init.Mode = DMA2D_M2M;
Dma2dHandle.Init.ColorMode = DMA2D_OUTPUT_RGB565;
Dma2dHandle.Init.OutputOffset = 0;
Dma2dHandle.Init.AlphaInverted = DMA2D_REGULAR_ALPHA; /* No Output Alpha Inversion*/
Dma2dHandle.Init.RedBlueSwap = DMA2D_RB_REGULAR; /* No Output Red & Blue swap */
/*##hdma2d2- DMA2D Callbacks Configuration ######################################*/
Dma2dHandle.XferCpltCallback = TransferComplete;
Dma2dHandle.XferErrorCallback = TransferError;
/*##-3- Foreground Configuration ###########################################*/
Dma2dHandle.LayerCfg[1].AlphaMode = DMA2D_NO_MODIF_ALPHA; //DMA2D_REPLACE_ALPHA;
Dma2dHandle.LayerCfg[1].InputAlpha = 0xFF;
Dma2dHandle.LayerCfg[1].InputColorMode = DMA2D_INPUT_RGB565;
Dma2dHandle.LayerCfg[1].InputOffset = 0;
Dma2dHandle.LayerCfg[1].RedBlueSwap = DMA2D_RB_REGULAR; /* No ForeGround Red/Blue swap */
Dma2dHandle.LayerCfg[1].AlphaInverted = DMA2D_REGULAR_ALPHA; /* No ForeGround Alpha inversion */
Dma2dHandle.Instance = DMA2D;
/* DMA2D Initialization */
if(HAL_DMA2D_Init(&Dma2dHandle) == HAL_OK)
{
if(HAL_DMA2D_ConfigLayer(&Dma2dHandle, 1) == HAL_OK)
{
image_ready = 0;
/* setup RAIO controller to receive data
Active_Window(0,319,0,239);
LCD_SetCursor(0,0);
LCD_WriteRAM_Prepare(); */
if (HAL_DMA2D_Start_IT(&Dma2dHandle,(uint32_t)&RGB565_circ,
(uint32_t)&aBufferResult, //0x60000000,
320,
240) == HAL_OK)
{
while(image_ready == 0){;}
}
}
}
}
