C++ (Cpp) HAL_LTDC_GetState примеры использования

Пример #1

Файл: stm32746g_discovery_lcd.c Проект: picohari/intewa_stm32f7

/**
  * @brief  Initializes the LCD.
  * @retval LCD state
  */
uint8_t BSP_LCD_Init(void)
{    
  /* Select the used LCD */

  /* The RK043FN48H LCD 480x272 is selected */
  /* Timing Configuration */
  hLtdcHandler.Init.HorizontalSync = (RK043FN48H_HSYNC - 1);
  hLtdcHandler.Init.VerticalSync = (RK043FN48H_VSYNC - 1);
  hLtdcHandler.Init.AccumulatedHBP = (RK043FN48H_HSYNC + RK043FN48H_HBP - 1);
  hLtdcHandler.Init.AccumulatedVBP = (RK043FN48H_VSYNC + RK043FN48H_VBP - 1);
  hLtdcHandler.Init.AccumulatedActiveH = (RK043FN48H_HEIGHT + RK043FN48H_VSYNC + RK043FN48H_VBP - 1);
  hLtdcHandler.Init.AccumulatedActiveW = (RK043FN48H_WIDTH + RK043FN48H_HSYNC + RK043FN48H_HBP - 1);
  hLtdcHandler.Init.TotalHeigh = (RK043FN48H_HEIGHT + RK043FN48H_VSYNC + RK043FN48H_VBP + RK043FN48H_VFP - 1);
  hLtdcHandler.Init.TotalWidth = (RK043FN48H_WIDTH + RK043FN48H_HSYNC + RK043FN48H_HBP + RK043FN48H_HFP - 1);
  
  /* LCD clock configuration */
  BSP_LCD_ClockConfig(&hLtdcHandler, NULL);

  /* Initialize the LCD pixel width and pixel height */
  hLtdcHandler.LayerCfg->ImageWidth  = RK043FN48H_WIDTH;
  hLtdcHandler.LayerCfg->ImageHeight = RK043FN48H_HEIGHT;

  /* Background value */
  hLtdcHandler.Init.Backcolor.Blue = 0;
  hLtdcHandler.Init.Backcolor.Green = 0;
  hLtdcHandler.Init.Backcolor.Red = 0;
  
  /* Polarity */
  hLtdcHandler.Init.HSPolarity = LTDC_HSPOLARITY_AL;
  hLtdcHandler.Init.VSPolarity = LTDC_VSPOLARITY_AL; 
  hLtdcHandler.Init.DEPolarity = LTDC_DEPOLARITY_AL;  
  hLtdcHandler.Init.PCPolarity = LTDC_PCPOLARITY_IPC;
  hLtdcHandler.Instance = LTDC;

  if(HAL_LTDC_GetState(&hLtdcHandler) == HAL_LTDC_STATE_RESET)
  {
    /* Initialize the LCD Msp: this __weak function can be rewritten by the application */
    BSP_LCD_MspInit(&hLtdcHandler, NULL);
  }
  HAL_LTDC_Init(&hLtdcHandler);

  /* Assert display enable LCD_DISP pin */
  HAL_GPIO_WritePin(LCD_DISP_GPIO_PORT, LCD_DISP_PIN, GPIO_PIN_SET);

  /* Assert backlight LCD_BL_CTRL pin */
  HAL_GPIO_WritePin(LCD_BL_CTRL_GPIO_PORT, LCD_BL_CTRL_PIN, GPIO_PIN_SET);

#if !defined(DATA_IN_ExtSDRAM)
  /* Initialize the SDRAM */
  BSP_SDRAM_Init();
#endif
    
  /* Initialize the font */
  BSP_LCD_SetFont(&LCD_DEFAULT_FONT);
  
  return LCD_OK;
}

Пример #2

Файл: lcd.c Проект: david-dee/lk

/**
  * @brief  Initializes the LCD.
  * @retval LCD state
  */
uint8_t BSP_LCD_Init(void)
{
    /* Timing Configuration */
    ltdc_handle.Init.HorizontalSync = (RK043FN48H_HSYNC - 1);
    ltdc_handle.Init.VerticalSync = (RK043FN48H_VSYNC - 1);
    ltdc_handle.Init.AccumulatedHBP = (RK043FN48H_HSYNC + RK043FN48H_HBP - 1);
    ltdc_handle.Init.AccumulatedVBP = (RK043FN48H_VSYNC + RK043FN48H_VBP - 1);
    ltdc_handle.Init.AccumulatedActiveH = (RK043FN48H_HEIGHT + RK043FN48H_VSYNC + RK043FN48H_VBP - 1);
    ltdc_handle.Init.AccumulatedActiveW = (RK043FN48H_WIDTH + RK043FN48H_HSYNC + RK043FN48H_HBP - 1);
    ltdc_handle.Init.TotalHeigh = (RK043FN48H_HEIGHT + RK043FN48H_VSYNC + RK043FN48H_VBP + RK043FN48H_VFP - 1);
    ltdc_handle.Init.TotalWidth = (RK043FN48H_WIDTH + RK043FN48H_HSYNC + RK043FN48H_HBP + RK043FN48H_HFP - 1);

    /* LCD clock configuration */
    BSP_LCD_ClockConfig(&ltdc_handle, NULL);

    /* Initialize the LCD pixel width and pixel height */
    ltdc_handle.LayerCfg->ImageWidth  = RK043FN48H_WIDTH;
    ltdc_handle.LayerCfg->ImageHeight = RK043FN48H_HEIGHT;

    /* Background value */
    ltdc_handle.Init.Backcolor.Blue = 0;
    ltdc_handle.Init.Backcolor.Green = 0;
    ltdc_handle.Init.Backcolor.Red = 0;

    /* Polarity */
    ltdc_handle.Init.HSPolarity = LTDC_HSPOLARITY_AL;
    ltdc_handle.Init.VSPolarity = LTDC_VSPOLARITY_AL;
    ltdc_handle.Init.DEPolarity = LTDC_DEPOLARITY_AL;
    ltdc_handle.Init.PCPolarity = LTDC_PCPOLARITY_IPC;
    ltdc_handle.Instance = LTDC;

    if (HAL_LTDC_GetState(&ltdc_handle) == HAL_LTDC_STATE_RESET) {
        BSP_LCD_MspInit(&ltdc_handle, NULL);
    }

    HAL_LTDC_Init(&ltdc_handle);

    /* allocate the framebuffer */
    size_t fb_size_pages = PAGE_ALIGN(RK043FN48H_WIDTH * RK043FN48H_HEIGHT * 4) / PAGE_SIZE;
    void *fb_address = novm_alloc_pages(fb_size_pages, NOVM_ARENA_SECONDARY);
    if (!fb_address)
        panic("failed to allocate framebuffer for LCD\n");

    BSP_LCD_LayerDefaultInit(0, (uint32_t)fb_address);
    BSP_LCD_SelectLayer(0);

    /* clear framebuffer */
    memset((void *)ltdc_handle.LayerCfg[active_layer].FBStartAdress, 0,
           BSP_LCD_GetXSize() * BSP_LCD_GetYSize() * BSP_LCD_PixelSize());

    /* turn the display on */
    BSP_LCD_DisplayOn();
    return LCD_OK;
}