--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Common/Drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_ltdc_ex.c	Thu Mar 07 15:06:43 2019 +0100
@@ -0,0 +1,160 @@
+/**
+  ******************************************************************************
+  * @file    stm32f4xx_hal_ltdc_ex.c
+  * @author  MCD Application Team
+  * @brief   LTDC Extension HAL module driver.
+  ******************************************************************************
+  * @attention
+  *
+  * <h2><center>&copy; COPYRIGHT(c) 2017 STMicroelectronics</center></h2>
+  *
+  * Redistribution and use in source and binary forms, with or without modification,
+  * are permitted provided that the following conditions are met:
+  *   1. Redistributions of source code must retain the above copyright notice,
+  *      this list of conditions and the following disclaimer.
+  *   2. Redistributions in binary form must reproduce the above copyright notice,
+  *      this list of conditions and the following disclaimer in the documentation
+  *      and/or other materials provided with the distribution.
+  *   3. Neither the name of STMicroelectronics nor the names of its contributors
+  *      may be used to endorse or promote products derived from this software
+  *      without specific prior written permission.
+  *
+  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+  *
+  ******************************************************************************
+  */ 
+
+/* Includes ------------------------------------------------------------------*/
+#include "stm32f4xx_hal.h"
+
+/** @addtogroup STM32F4xx_HAL_Driver
+  * @{
+  */
+/** @defgroup LTDCEx LTDCEx
+  * @brief LTDC HAL module driver
+  * @{
+  */
+
+#ifdef HAL_LTDC_MODULE_ENABLED
+
+/* Private typedef -----------------------------------------------------------*/
+/* Private define ------------------------------------------------------------*/
+/* Private macro -------------------------------------------------------------*/
+/* Private variables ---------------------------------------------------------*/
+/* Private function prototypes -----------------------------------------------*/
+/* Exported functions --------------------------------------------------------*/
+
+/** @defgroup LTDCEx_Exported_Functions LTDC Extended Exported Functions
+  * @{
+  */
+
+/** @defgroup LTDCEx_Exported_Functions_Group1 Initialization and Configuration functions
+ *  @brief   Initialization and Configuration functions
+ *
+@verbatim   
+ ===============================================================================
+                ##### Initialization and Configuration functions #####
+ ===============================================================================  
+    [..]  This section provides functions allowing to:
+      (+) Initialize and configure the LTDC
+
+@endverbatim
+  * @{
+  */
+#if defined(STM32F469xx) || defined(STM32F479xx)
+/**
+  * @brief  Retrieve common parameters from DSI Video mode configuration structure
+  * @param  hltdc   pointer to a LTDC_HandleTypeDef structure that contains
+  *                 the configuration information for the LTDC.
+  * @param  VidCfg  pointer to a DSI_VidCfgTypeDef structure that contains
+  *                 the DSI video mode configuration parameters
+  * @note   The implementation of this function is taking into account the LTDC
+  *         polarities inversion as described in the current LTDC specification
+  * @retval HAL status
+  */
+HAL_StatusTypeDef HAL_LTDCEx_StructInitFromVideoConfig(LTDC_HandleTypeDef* hltdc, DSI_VidCfgTypeDef *VidCfg)
+{
+  /* Retrieve signal polarities from DSI */
+  
+  /* The following polarity is inverted:
+                     LTDC_DEPOLARITY_AL <-> LTDC_DEPOLARITY_AH */
+  
+  /* Note 1 : Code in line w/ Current LTDC specification */
+  hltdc->Init.DEPolarity = (VidCfg->DEPolarity == DSI_DATA_ENABLE_ACTIVE_HIGH) ? LTDC_DEPOLARITY_AL : LTDC_DEPOLARITY_AH;
+  hltdc->Init.VSPolarity = (VidCfg->VSPolarity == DSI_VSYNC_ACTIVE_HIGH) ? LTDC_VSPOLARITY_AH : LTDC_VSPOLARITY_AL;
+  hltdc->Init.HSPolarity = (VidCfg->HSPolarity == DSI_HSYNC_ACTIVE_HIGH) ? LTDC_HSPOLARITY_AH : LTDC_HSPOLARITY_AL;
+
+  /* Note 2: Code to be used in case LTDC polarities inversion updated in the specification */
+  /* hltdc->Init.DEPolarity = VidCfg->DEPolarity << 29;
+     hltdc->Init.VSPolarity = VidCfg->VSPolarity << 29;
+     hltdc->Init.HSPolarity = VidCfg->HSPolarity << 29; */
+    
+  /* Retrieve vertical timing parameters from DSI */
+  hltdc->Init.VerticalSync       = VidCfg->VerticalSyncActive - 1U;
+  hltdc->Init.AccumulatedVBP     = VidCfg->VerticalSyncActive + VidCfg->VerticalBackPorch - 1U;
+  hltdc->Init.AccumulatedActiveH = VidCfg->VerticalSyncActive + VidCfg->VerticalBackPorch + VidCfg->VerticalActive - 1U;
+  hltdc->Init.TotalHeigh         = VidCfg->VerticalSyncActive + VidCfg->VerticalBackPorch + VidCfg->VerticalActive + VidCfg->VerticalFrontPorch - 1U;
+  
+  return HAL_OK;
+}
+
+/**
+  * @brief  Retrieve common parameters from DSI Adapted command mode configuration structure
+  * @param  hltdc   pointer to a LTDC_HandleTypeDef structure that contains
+  *                 the configuration information for the LTDC.
+  * @param  CmdCfg  pointer to a DSI_CmdCfgTypeDef structure that contains
+  *                 the DSI command mode configuration parameters
+  * @note   The implementation of this function is taking into account the LTDC
+  *         polarities inversion as described in the current LTDC specification
+  * @retval HAL status
+  */
+HAL_StatusTypeDef HAL_LTDCEx_StructInitFromAdaptedCommandConfig(LTDC_HandleTypeDef* hltdc, DSI_CmdCfgTypeDef *CmdCfg)
+{
+  /* Retrieve signal polarities from DSI */
+  
+  /* The following polarities are inverted:
+                     LTDC_DEPOLARITY_AL <-> LTDC_DEPOLARITY_AH
+                     LTDC_VSPOLARITY_AL <-> LTDC_VSPOLARITY_AH
+                     LTDC_HSPOLARITY_AL <-> LTDC_HSPOLARITY_AH)*/
+  
+  /* Note 1 : Code in line w/ Current LTDC specification */
+  hltdc->Init.DEPolarity = (CmdCfg->DEPolarity == DSI_DATA_ENABLE_ACTIVE_HIGH) ? LTDC_DEPOLARITY_AL : LTDC_DEPOLARITY_AH;
+  hltdc->Init.VSPolarity = (CmdCfg->VSPolarity == DSI_VSYNC_ACTIVE_HIGH) ? LTDC_VSPOLARITY_AL : LTDC_VSPOLARITY_AH;
+  hltdc->Init.HSPolarity = (CmdCfg->HSPolarity == DSI_HSYNC_ACTIVE_HIGH) ? LTDC_HSPOLARITY_AL : LTDC_HSPOLARITY_AH;
+  
+  /* Note 2: Code to be used in case LTDC polarities inversion updated in the specification */
+  /* hltdc->Init.DEPolarity = CmdCfg->DEPolarity << 29;
+     hltdc->Init.VSPolarity = CmdCfg->VSPolarity << 29;
+     hltdc->Init.HSPolarity = CmdCfg->HSPolarity << 29; */
+  
+  return HAL_OK;
+}
+#endif /* STM32F469xx || STM32F479xx */
+
+/**
+  * @}
+  */
+
+/**
+  * @}
+  */
+
+#endif /* HAL_DCMI_MODULE_ENABLED */
+/**
+  * @}
+  */
+
+/**
+  * @}
+  */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/