/**
* @brief Initialize the LTDC
* @param None
* @retval None
*/
void LTDC_Init(void)
{
/* DeInit */
HAL_LTDC_DeInit(&hltdc_eval);
/* LTDC Config */
/* Timing and polarity */
hltdc_eval.Init.HorizontalSync = HSYNC;
hltdc_eval.Init.VerticalSync = VSYNC;
hltdc_eval.Init.AccumulatedHBP = HSYNC+HBP;
hltdc_eval.Init.AccumulatedVBP = VSYNC+VBP;
hltdc_eval.Init.AccumulatedActiveH = VSYNC+VBP+VACT;
hltdc_eval.Init.AccumulatedActiveW = HSYNC+HBP+HACT;
hltdc_eval.Init.TotalHeigh = VSYNC+VBP+VACT+VFP;
hltdc_eval.Init.TotalWidth = HSYNC+HBP+HACT+HFP;
/* background value */
hltdc_eval.Init.Backcolor.Blue = 0;
hltdc_eval.Init.Backcolor.Green = 0;
hltdc_eval.Init.Backcolor.Red = 0;
/* Polarity */
hltdc_eval.Init.HSPolarity = LTDC_HSPOLARITY_AL;
hltdc_eval.Init.VSPolarity = LTDC_VSPOLARITY_AL;
hltdc_eval.Init.DEPolarity = LTDC_DEPOLARITY_AL;
hltdc_eval.Init.PCPolarity = LTDC_PCPOLARITY_IPC;
hltdc_eval.Instance = LTDC;
HAL_LTDC_Init(&hltdc_eval);
}
/**
* @brief DeInitializes the LCD.
* @retval LCD state
*/
uint8_t BSP_LCD_DeInit(void)
{
/* Initialize the hLtdcHandler Instance parameter */
hLtdcHandler.Instance = LTDC;
/* Disable LTDC block */
__HAL_LTDC_DISABLE(&hLtdcHandler);
/* DeInit the LTDC */
HAL_LTDC_DeInit(&hLtdcHandler);
/* DeInit the LTDC MSP : this __weak function can be rewritten by the application */
BSP_LCD_MspDeInit(&hLtdcHandler, NULL);
return LCD_OK;
}
/**
* @brief LCD configuration.
* @note This function Configure tha LTDC peripheral :
* 1) Configure the Pixel Clock for the LCD
* 2) Configure the LTDC Timing and Polarity
* 3) Configure the LTDC Layer 2 :
* - ARGB4444 as pixel format
* - The frame buffer is located at internal RAM : The output of DMA2D transfer
* - The Layer size configuration : 100x100
* @retval
* None
*/
static void LCD_Config(void)
{
static RCC_PeriphCLKInitTypeDef PeriphClkInitStruct;
static LTDC_HandleTypeDef hltdc_F;
LTDC_LayerCfgTypeDef pLayerCfg;
/* LTDC Initialization -------------------------------------------------------*/
/* DeInit */
HAL_LTDC_DeInit(&hltdc_F);
/* Polarity configuration */
/* Initialize the horizontal synchronization polarity as active low */
hltdc_F.Init.HSPolarity = LTDC_HSPOLARITY_AL;
/* Initialize the vertical synchronization polarity as active low */
hltdc_F.Init.VSPolarity = LTDC_VSPOLARITY_AL;
/* Initialize the data enable polarity as active low */
hltdc_F.Init.DEPolarity = LTDC_DEPOLARITY_AL;
/* Initialize the pixel clock polarity as input pixel clock */
hltdc_F.Init.PCPolarity = LTDC_PCPOLARITY_IPC;
/* Timing configuration */
/* Horizontal synchronization width = Hsync - 1 */
hltdc_F.Init.HorizontalSync = 40;
/* Vertical synchronization height = Vsync - 1 */
hltdc_F.Init.VerticalSync = 9;
/* Accumulated horizontal back porch = Hsync + HBP - 1 */
hltdc_F.Init.AccumulatedHBP = 42;
/* Accumulated vertical back porch = Vsync + VBP - 1 */
hltdc_F.Init.AccumulatedVBP = 11;
/* Accumulated active width = Hsync + HBP + Active Width - 1 */
hltdc_F.Init.AccumulatedActiveH = 283;
/* Accumulated active height = Vsync + VBP + Active Heigh - 1 */
hltdc_F.Init.AccumulatedActiveW = 522;
/* Total height = Vsync + VBP + Active Heigh + VFP - 1 */
hltdc_F.Init.TotalHeigh = 285;
/* Total width = Hsync + HBP + Active Width + HFP - 1 */
hltdc_F.Init.TotalWidth = 524;
/* LCD clock configuration */
/* PLLSAI_VCO Input = HSE_VALUE/PLL_M = 1 MHz */
/* PLLSAI_VCO Output = PLLSAI_VCO Input * PLLSAIN = 192 MHz */
/* PLLLCDCLK = PLLSAI_VCO Output/PLLSAIR = 192/5 = 38.4 MHz */
/* LTDC clock frequency = PLLLCDCLK / LTDC_PLLSAI_DIVR_4 = 38.4/4 = 9.6MHz */
PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_LTDC;
PeriphClkInitStruct.PLLSAI.PLLSAIN = 192;
PeriphClkInitStruct.PLLSAI.PLLSAIR = 5;
PeriphClkInitStruct.PLLSAIDivR = RCC_PLLSAIDIVR_4;
HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct);
/* Configure R,G,B component values for LCD background color */
hltdc_F.Init.Backcolor.Blue = 0;
hltdc_F.Init.Backcolor.Green = 0;
hltdc_F.Init.Backcolor.Red = 0;
hltdc_F.Instance = LTDC;
/* Layer1 Configuration ------------------------------------------------------*/
/* Windowing configuration */
/*
WindowX0 = Horizontal start
WindowX1 = Horizontal stop
WindowY0 = Vertical start
WindowY1 = Vertical stop
*/
pLayerCfg.WindowX0 = 0;
pLayerCfg.WindowX1 = 100;
pLayerCfg.WindowY0 = 0;
pLayerCfg.WindowY1 = 100;
/* Pixel Format configuration*/
pLayerCfg.PixelFormat = LTDC_PIXEL_FORMAT_ARGB4444;
/* Start Address configuration : frame buffer is located at FLASH memory */
pLayerCfg.FBStartAdress = (uint32_t)&aBufferResult;
/* Alpha constant (255 totally opaque) */
pLayerCfg.Alpha = 255;
/* Default Color configuration (configure A,R,G,B component values) */
pLayerCfg.Alpha0 = 0;
pLayerCfg.Backcolor.Blue = 0;
pLayerCfg.Backcolor.Green = 0;
pLayerCfg.Backcolor.Red = 0;
/* Configure blending factors */
pLayerCfg.BlendingFactor1 = LTDC_BLENDING_FACTOR1_CA;
pLayerCfg.BlendingFactor2 = LTDC_BLENDING_FACTOR2_CA;
/* Configure the number of lines and number of pixels per line */
pLayerCfg.ImageWidth = 100;
pLayerCfg.ImageHeight = 100;
/* Configure the LTDC */
HAL_LTDC_Init(&hltdc_F);
/* Configure the Layer */
HAL_LTDC_ConfigLayer(&hltdc_F, &pLayerCfg, 1);
}
