text: /**
    ******************************************************************************
    * @file    stm32446e_eval_sdram.h
    * @author  MCD Application Team
    * @brief   This file contains the common defines and functions prototypes for
    *          the stm32446e_eval_sdram.c 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.
    *
    ******************************************************************************
    */ 
  
  /* Define to prevent recursive inclusion -------------------------------------*/
  #ifndef __STM32446E_EVAL_SDRAM_H
  #define __STM32446E_EVAL_SDRAM_H
  
  #ifdef __cplusplus
   extern "C" {
  #endif 
  
  /* Includes ------------------------------------------------------------------*/
  #include "stm32f4xx_hal.h"
  
  /** @addtogroup BSP
    * @{
    */ 
  
  /** @addtogroup STM32446E_EVAL
    * @{
    */
      
  /** @defgroup STM32446E_EVAL_SDRAM STM32446E EVAL SDRAM
    * @{
    */    
  
  /** @defgroup STM32446E_EVAL_SDRAM_Exported_Types STM32446E EVAL SDRAM Exported Types
    * @{
    */
  
  /** 
    * @brief  SDRAM status structure definition  
    */     
  #define   SDRAM_OK         ((uint8_t)0x00)
  #define   SDRAM_ERROR      ((uint8_t)0x01)
  
  /**
    * @}
    */
    
  /** @defgroup STM32446E_EVAL_SDRAM_Exported_Constants STM32446E EVAL SDRAM Exported Constants
    * @{
    */ 
  #define SDRAM_DEVICE_ADDR  ((uint32_t)0xC0000000)
  #define SDRAM_DEVICE_SIZE  ((uint32_t)0x800000)  /* SDRAM device size in Bytes */
  
  /* #define SDRAM_MEMORY_WIDTH            FMC_SDRAM_MEM_BUS_WIDTH_8  */
  #define SDRAM_MEMORY_WIDTH            FMC_SDRAM_MEM_BUS_WIDTH_16 
  
  #define SDCLOCK_PERIOD                   FMC_SDRAM_CLOCK_PERIOD_2
  /* #define SDCLOCK_PERIOD                FMC_SDRAM_CLOCK_PERIOD_3 */   
  
  #define REFRESH_COUNT                    ((uint32_t)0x0569)   /* SDRAM refresh counter (90Mhz SD clock) */
     
  #define SDRAM_TIMEOUT     ((uint32_t)0xFFFF) 
  
  /* DMA definitions for SDRAM DMA transfer */
  #define __DMAx_CLK_ENABLE                 __HAL_RCC_DMA2_CLK_ENABLE
  #define __DMAx_CLK_DISABLE                __HAL_RCC_DMA2_CLK_DISABLE
  #define SDRAM_DMAx_CHANNEL                DMA_CHANNEL_0
  #define SDRAM_DMAx_STREAM                 DMA2_Stream0  
  #define SDRAM_DMAx_IRQn                   DMA2_Stream0_IRQn
  #define SDRAM_DMAx_IRQHandler             DMA2_Stream0_IRQHandler  
   
    
  /**
    * @brief  FMC SDRAM Mode definition register defines
    */
  #define SDRAM_MODEREG_BURST_LENGTH_1             ((uint16_t)0x0000)
  #define SDRAM_MODEREG_BURST_LENGTH_2             ((uint16_t)0x0001)
  #define SDRAM_MODEREG_BURST_LENGTH_4             ((uint16_t)0x0002)
  #define SDRAM_MODEREG_BURST_LENGTH_8             ((uint16_t)0x0004)
  #define SDRAM_MODEREG_BURST_TYPE_SEQUENTIAL      ((uint16_t)0x0000)
  #define SDRAM_MODEREG_BURST_TYPE_INTERLEAVED     ((uint16_t)0x0008)
  #define SDRAM_MODEREG_CAS_LATENCY_2              ((uint16_t)0x0020)
  #define SDRAM_MODEREG_CAS_LATENCY_3              ((uint16_t)0x0030)
  #define SDRAM_MODEREG_OPERATING_MODE_STANDARD    ((uint16_t)0x0000)
  #define SDRAM_MODEREG_WRITEBURST_MODE_PROGRAMMED ((uint16_t)0x0000) 
  #define SDRAM_MODEREG_WRITEBURST_MODE_SINGLE     ((uint16_t)0x0200) 
  /**
    * @}
    */ 
    
  /** @defgroup STM32446E_EVAL_SDRAM_Exported_Macro STM32446E EVAL SDRAM Exported Macro
    * @{
    */  
  /**
    * @}
    */ 
     
  /** @defgroup STM32446E_EVAL_SDRAM_Exported_Functions STM32446E EVAL SDRAM Exported Functions
    * @{
    */  
  uint8_t BSP_SDRAM_Init(void);
  uint8_t BSP_SDRAM_DeInit(void);
  void    BSP_SDRAM_Initialization_sequence(uint32_t RefreshCount);
  uint8_t BSP_SDRAM_ReadData(uint32_t uwStartAddress, uint32_t *pData, uint32_t uwDataSize);
  uint8_t BSP_SDRAM_ReadData_DMA(uint32_t uwStartAddress, uint32_t *pData, uint32_t uwDataSize);
  uint8_t BSP_SDRAM_WriteData(uint32_t uwStartAddress, uint32_t *pData, uint32_t uwDataSize);
  uint8_t BSP_SDRAM_WriteData_DMA(uint32_t uwStartAddress, uint32_t *pData, uint32_t uwDataSize);
  uint8_t BSP_SDRAM_Sendcmd(FMC_SDRAM_CommandTypeDef *SdramCmd);
  void    BSP_SDRAM_DMA_IRQHandler(void);  
     
  /* These function can be modified in case the current settings (e.g. DMA stream)
     need to be changed for specific application needs */
  void    BSP_SDRAM_MspInit(SDRAM_HandleTypeDef  *hsdram, void *Params);
  void    BSP_SDRAM_MspDeInit(SDRAM_HandleTypeDef  *hsdram, void *Params);
  
  
  /**
    * @}
    */ 
  
  /**
    * @}
    */ 
  
  /**
    * @}
    */ 
  
  /**
    * @}
    */ 
  
  #ifdef __cplusplus
  }
  #endif
  
  #endif /* __STM32446E_EVAL_SDRAM_H */
  
  /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
  