| /** |
| ****************************************************************************** |
| * @file stm32l4xx_hal_ltdc_ex.c |
| * @author MCD Application Team |
| * @brief LTDC Extension HAL module driver. |
| ****************************************************************************** |
| * @attention |
| * |
| * <h2><center>© 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 "stm32l4xx_hal.h" |
| |
| /** @addtogroup STM32L4xx_HAL_Driver |
| * @{ |
| */ |
| |
| #if defined (LTDC) && defined (DSI) |
| |
| /** @defgroup LTDCEx LTDCEx |
| * @brief LTDC HAL module driver |
| * @{ |
| */ |
| |
| #if defined(HAL_LTDC_MODULE_ENABLED) && defined(HAL_DSI_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 |
| * @{ |
| */ |
| |
| /** |
| * @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 /* HAL_LTCD_MODULE_ENABLED && HAL_DSI_MODULE_ENABLED */ |
| |
| /** |
| * @} |
| */ |
| |
| #endif /* LTDC && DSI */ |
| |
| /** |
| * @} |
| */ |
| |
| /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ |