stm324xg_eval_sd.c

/**
  ******************************************************************************
  * @file    stm324xg_eval_sd.c
  * @author  MCD Application Team
  * @brief   This file includes the uSD card driver mounted on STM324xG-EVAL
  *          evaluation board.
  ******************************************************************************
  * @attention
  *
  * Copyright (c) 2017 STMicroelectronics.
  * All rights reserved.
  *
  * This software is licensed under terms that can be found in the LICENSE file
  * in the root directory of this software component.
  * If no LICENSE file comes with this software, it is provided AS-IS.
  *
  ******************************************************************************
  */

/* File Info : -----------------------------------------------------------------
                                   User NOTES
1. How To use this driver:
--------------------------
   - This driver is used to drive the micro SD external card mounted on STM324xG-EVAL 
     evaluation board.
   - This driver does not need a specific component driver for the micro SD device
     to be included with.

2. Driver description:
---------------------
  + Initialization steps:
     o Initialize the micro SD card using the BSP_SD_Init() function. This 
       function includes the MSP layer hardware resources initialization and the
       SDIO interface configuration to interface with the external micro SD. It 
       also includes the micro SD initialization sequence.
     o To check the SD card presence you can use the function BSP_SD_IsDetected() which 
       returns the detection status 
     o If SD presence detection interrupt mode is desired, you must configure the 
       SD detection interrupt mode by calling the function BSP_SD_ITConfig(). The interrupt 
       is generated as an external interrupt whenever the micro SD card is 
       plugged/unplugged in/from the evaluation board. The SD detection interrupt
       is handled by calling the function BSP_SD_DetectIT() which is called in the IRQ
       handler file, the user callback is implemented in the function BSP_SD_DetectCallback().
     o The function BSP_SD_GetCardInfo() is used to get the micro SD card information 
       which is stored in the structure "HAL_SD_CardInfoTypedef".
  
     + Micro SD card operations
        o The micro SD card can be accessed with read/write block(s) operations once 
          it is ready for access. The access can be performed whether using the polling
          mode by calling the functions BSP_SD_ReadBlocks()/BSP_SD_WriteBlocks(), or by DMA 
          transfer using the functions BSP_SD_ReadBlocks_DMA()/BSP_SD_WriteBlocks_DMA()
        o The DMA transfer complete is used with interrupt mode. Once the SD transfer
          is complete, the SD interrupt is handled using the function BSP_SD_IRQHandler(),
          the DMA Tx/Rx transfer complete are handled using the functions
          BSP_SD_DMA_Tx_IRQHandler()/BSP_SD_DMA_Rx_IRQHandler(). The corresponding user callbacks 
          are implemented by the user at application level. 
        o The SD erase block(s) is performed using the function BSP_SD_Erase() with specifying
          the number of blocks to erase.
        o The SD runtime status is returned when calling the function BSP_SD_GetCardState().
 
------------------------------------------------------------------------------*/ 

/* Includes ------------------------------------------------------------------*/
#include "stm324xg_eval_sd.h"

/** @addtogroup BSP
  * @{
  */

/** @addtogroup STM324xG_EVAL
  * @{
  */ 
  
/** @defgroup STM324xG_EVAL_SD STM324xG EVAL SD
  * @{
  */ 

/** @defgroup STM324xG_EVAL_SD_Private_Variables STM324xG EVAL SD Private Variables
  * @{
  */       
SD_HandleTypeDef uSdHandle;
/**
  * @}
  */ 

/** @defgroup STM324xG_EVAL_SD_Private_Functions STM324xG EVAL SD Private Functions
  * @{
  */

/**
  * @brief  Initializes the SD card device.
  * @retval SD status.
  */
uint8_t BSP_SD_Init(void)
{ 
  uint8_t SD_state = MSD_OK;
  
  /* uSD device interface configuration */
  uSdHandle.Instance = SDIO;

  uSdHandle.Init.ClockEdge           = SDIO_CLOCK_EDGE_RISING;
  uSdHandle.Init.ClockBypass         = SDIO_CLOCK_BYPASS_DISABLE;
  uSdHandle.Init.ClockPowerSave      = SDIO_CLOCK_POWER_SAVE_DISABLE;
  uSdHandle.Init.BusWide             = SDIO_BUS_WIDE_1B;
  uSdHandle.Init.HardwareFlowControl = SDIO_HARDWARE_FLOW_CONTROL_DISABLE;
  uSdHandle.Init.ClockDiv            = SDIO_TRANSFER_CLK_DIV;
  
  /* Check if the SD card is plugged in the slot */
  if(BSP_SD_IsDetected() != SD_PRESENT)
  {
    return MSD_ERROR;
  }
  
  /* Msp SD initialization */
  BSP_SD_MspInit(&uSdHandle, NULL);

  if(HAL_SD_Init(&uSdHandle) != HAL_OK)
  {
    SD_state = MSD_ERROR;
  }
  
  /* Configure SD Bus width */
  if(SD_state == MSD_OK)
  {
    /* Enable wide operation */
    if(HAL_SD_ConfigWideBusOperation(&uSdHandle, SDIO_BUS_WIDE_4B) != HAL_OK)
    {
      SD_state = MSD_ERROR;
    }
    else
    {
      SD_state = MSD_OK;
    }
  }
  
  return  SD_state;
}

/**
  * @brief  Configures Interrupt mode for SD detection pin.
  * @retval Returns 0
  */
uint8_t BSP_SD_ITConfig(void)
{ 
  GPIO_InitTypeDef GPIO_Init_Structure;
  
  /* Configure Interrupt mode for SD detection pin */ 
  GPIO_Init_Structure.Mode      = GPIO_MODE_IT_RISING_FALLING;
  GPIO_Init_Structure.Pull      = GPIO_PULLUP;
  GPIO_Init_Structure.Speed     = GPIO_SPEED_HIGH;
  GPIO_Init_Structure.Pin       = SD_DETECT_PIN;
  HAL_GPIO_Init(SD_DETECT_GPIO_PORT, &GPIO_Init_Structure);
    
  /* NVIC configuration for SDIO interrupts */
  HAL_NVIC_SetPriority(SD_DETECT_IRQn, 0x0E, 0);
  HAL_NVIC_EnableIRQ(SD_DETECT_IRQn);
  
  return 0;
}

/**
  * @brief  Detects if SD card is correctly plugged in the memory slot or not.
  * @retval Returns if SD is detected or not
  */
uint8_t BSP_SD_IsDetected(void)
{
  __IO uint8_t status = SD_PRESENT;

  /* Check SD card detect pin */
  if(HAL_GPIO_ReadPin(SD_DETECT_GPIO_PORT, SD_DETECT_PIN) != GPIO_PIN_RESET) 
  {
    status = SD_NOT_PRESENT;
  }
  
  return status;
}
/**
  * @brief  SD detect IT treatment
  */
void BSP_SD_DetectIT(void)
{
  /* SD detect IT callback */
  BSP_SD_DetectCallback();
  
}

/** 
  * @brief  SD detect IT detection callback
  */
__weak void BSP_SD_DetectCallback(void)
{
  /* NOTE: This function Should not be modified, when the callback is needed,
  the BSP_SD_DetectCallback could be implemented in the user file
  */ 
  
}

/**
  * @brief  Reads block(s) from a specified address in an SD card, in polling mode.
  * @param  pData: Pointer to the buffer that will contain the data to transmit
  * @param  ReadAddr: Address from where data is to be read
  * @param  NumOfBlocks: Number of SD blocks to read
  * @param  Timeout: Timeout for read operation
  * @retval SD status
  */
uint8_t BSP_SD_ReadBlocks(uint32_t *pData, uint32_t ReadAddr, uint32_t NumOfBlocks, uint32_t Timeout)
{
  if(HAL_SD_ReadBlocks(&uSdHandle, (uint8_t *)pData, ReadAddr, NumOfBlocks, Timeout) != HAL_OK)
  {
    return MSD_ERROR;
  }
  else
  {
    return MSD_OK;
  }
}

/**
  * @brief  Writes block(s) to a specified address in an SD card, in polling mode. 
  * @param  pData: Pointer to the buffer that will contain the data to transmit
  * @param  WriteAddr: Address from where data is to be written
  * @param  NumOfBlocks: Number of SD blocks to write
  * @param  Timeout: Timeout for write operation
  * @retval SD status
  */
uint8_t BSP_SD_WriteBlocks(uint32_t *pData, uint32_t WriteAddr, uint32_t NumOfBlocks, uint32_t Timeout)
{
  if(HAL_SD_WriteBlocks(&uSdHandle, (uint8_t *)pData, WriteAddr, NumOfBlocks, Timeout) != HAL_OK)
  {
    return MSD_ERROR;
  }
  else
  {
    return MSD_OK;
  }
}

/**
  * @brief  Reads block(s) from a specified address in an SD card, in DMA mode.
  * @param  pData: Pointer to the buffer that will contain the data to transmit
  * @param  ReadAddr: Address from where data is to be read
  * @param  NumOfBlocks: Number of SD blocks to read 
  * @retval SD status
  */
uint8_t BSP_SD_ReadBlocks_DMA(uint32_t *pData, uint32_t ReadAddr, uint32_t NumOfBlocks)
{  
  /* Read block(s) in DMA transfer mode */
  if(HAL_SD_ReadBlocks_DMA(&uSdHandle, (uint8_t *)pData, ReadAddr, NumOfBlocks) != HAL_OK)
  {
    return MSD_ERROR;
  }
  else
  {
    return MSD_OK;
  }
}

/**
  * @brief  Writes block(s) to a specified address in an SD card, in DMA mode.
  * @param  pData: Pointer to the buffer that will contain the data to transmit
  * @param  WriteAddr: Address from where data is to be written
  * @param  NumOfBlocks: Number of SD blocks to write 
  * @retval SD status
  */
uint8_t BSP_SD_WriteBlocks_DMA(uint32_t *pData, uint32_t WriteAddr, uint32_t NumOfBlocks)
{ 
  /* Write block(s) in DMA transfer mode */
  if(HAL_SD_WriteBlocks_DMA(&uSdHandle, (uint8_t *)pData, WriteAddr, NumOfBlocks) != HAL_OK)
  {
    return MSD_ERROR;
  }
  else
  {
    return MSD_OK;
  }
}

/**
  * @brief  Erases the specified memory area of the given SD card. 
  * @param  StartAddr: Start byte address
  * @param  EndAddr: End byte address
  * @retval SD status
  */
uint8_t BSP_SD_Erase(uint32_t StartAddr, uint32_t EndAddr)
{
  if(HAL_SD_Erase(&uSdHandle, StartAddr, EndAddr) != HAL_OK)
  {
    return MSD_ERROR;
  }
  else
  {
    return MSD_OK;
  }
}

/**
  * @brief  Initializes the SD MSP.
  * @param  hsd: SD handle
  * @param  Params : pointer on additional configuration parameters, can be NULL.
  */
__weak void BSP_SD_MspInit(SD_HandleTypeDef *hsd, void *Params)
{
  static DMA_HandleTypeDef dmaRxHandle;
  static DMA_HandleTypeDef dmaTxHandle;
  GPIO_InitTypeDef GPIO_Init_Structure;
  
  /* Enable SDIO clock */
  __HAL_RCC_SDIO_CLK_ENABLE();
  
  /* Enable DMA2 clocks */
  __DMAx_TxRx_CLK_ENABLE();

  /* Enable GPIOs clock */
  __HAL_RCC_GPIOC_CLK_ENABLE();
  __HAL_RCC_GPIOD_CLK_ENABLE();
  __SD_DETECT_GPIO_CLK_ENABLE();
  
  /* Common GPIO configuration */
  GPIO_Init_Structure.Mode      = GPIO_MODE_AF_PP;
  GPIO_Init_Structure.Pull      = GPIO_PULLUP;
  GPIO_Init_Structure.Speed     = GPIO_SPEED_HIGH;
  GPIO_Init_Structure.Alternate = GPIO_AF12_SDIO;
  
  /* GPIOC configuration */
  GPIO_Init_Structure.Pin = GPIO_PIN_8 | GPIO_PIN_9 | GPIO_PIN_10 | GPIO_PIN_11 | GPIO_PIN_12;
   
  HAL_GPIO_Init(GPIOC, &GPIO_Init_Structure);

  /* GPIOD configuration */
  GPIO_Init_Structure.Pin = GPIO_PIN_2;
  HAL_GPIO_Init(GPIOD, &GPIO_Init_Structure);

  /* SD Card detect pin configuration */
  GPIO_Init_Structure.Mode      = GPIO_MODE_INPUT;
  GPIO_Init_Structure.Pull      = GPIO_PULLUP;
  GPIO_Init_Structure.Speed     = GPIO_SPEED_HIGH;
  GPIO_Init_Structure.Pin       = SD_DETECT_PIN;
  HAL_GPIO_Init(SD_DETECT_GPIO_PORT, &GPIO_Init_Structure);
    
  /* NVIC configuration for SDIO interrupts */
  HAL_NVIC_SetPriority(SDIO_IRQn, 0x0E, 0);
  HAL_NVIC_EnableIRQ(SDIO_IRQn);
    
  /* Configure DMA Rx parameters */
  dmaRxHandle.Init.Channel             = SD_DMAx_Rx_CHANNEL;
  dmaRxHandle.Init.Direction           = DMA_PERIPH_TO_MEMORY;
  dmaRxHandle.Init.PeriphInc           = DMA_PINC_DISABLE;
  dmaRxHandle.Init.MemInc              = DMA_MINC_ENABLE;
  dmaRxHandle.Init.PeriphDataAlignment = DMA_PDATAALIGN_WORD;
  dmaRxHandle.Init.MemDataAlignment    = DMA_MDATAALIGN_WORD;
  dmaRxHandle.Init.Mode                = DMA_PFCTRL;
  dmaRxHandle.Init.Priority            = DMA_PRIORITY_VERY_HIGH;
  dmaRxHandle.Init.FIFOMode            = DMA_FIFOMODE_ENABLE;
  dmaRxHandle.Init.FIFOThreshold       = DMA_FIFO_THRESHOLD_FULL;
  dmaRxHandle.Init.MemBurst            = DMA_MBURST_INC4;
  dmaRxHandle.Init.PeriphBurst         = DMA_PBURST_INC4;
  
  dmaRxHandle.Instance = SD_DMAx_Rx_STREAM;
  
  /* Associate the DMA handle */
  __HAL_LINKDMA(hsd, hdmarx, dmaRxHandle);
  
  /* Deinitialize the stream for new transfer */
  HAL_DMA_DeInit(&dmaRxHandle);
  
  /* Configure the DMA stream */
  HAL_DMA_Init(&dmaRxHandle);
  
  /* Configure DMA Tx parameters */
  dmaTxHandle.Init.Channel             = SD_DMAx_Tx_CHANNEL;
  dmaTxHandle.Init.Direction           = DMA_MEMORY_TO_PERIPH;
  dmaTxHandle.Init.PeriphInc           = DMA_PINC_DISABLE;
  dmaTxHandle.Init.MemInc              = DMA_MINC_ENABLE;
  dmaTxHandle.Init.PeriphDataAlignment = DMA_PDATAALIGN_WORD;
  dmaTxHandle.Init.MemDataAlignment    = DMA_MDATAALIGN_WORD;
  dmaTxHandle.Init.Mode                = DMA_PFCTRL;
  dmaTxHandle.Init.Priority            = DMA_PRIORITY_VERY_HIGH;
  dmaTxHandle.Init.FIFOMode            = DMA_FIFOMODE_ENABLE;
  dmaTxHandle.Init.FIFOThreshold       = DMA_FIFO_THRESHOLD_FULL;
  dmaTxHandle.Init.MemBurst            = DMA_MBURST_INC4;
  dmaTxHandle.Init.PeriphBurst         = DMA_PBURST_INC4;
  
  dmaTxHandle.Instance = SD_DMAx_Tx_STREAM;
  
  /* Associate the DMA handle */
  __HAL_LINKDMA(hsd, hdmatx, dmaTxHandle);
  
  /* Deinitialize the stream for new transfer */
  HAL_DMA_DeInit(&dmaTxHandle);
  
  /* Configure the DMA stream */
  HAL_DMA_Init(&dmaTxHandle); 
  
  /* NVIC configuration for DMA transfer complete interrupt */
  HAL_NVIC_SetPriority(SD_DMAx_Rx_IRQn, 0x0F, 0);
  HAL_NVIC_EnableIRQ(SD_DMAx_Rx_IRQn);
  
  /* NVIC configuration for DMA transfer complete interrupt */
  HAL_NVIC_SetPriority(SD_DMAx_Tx_IRQn, 0x0F, 0);
  HAL_NVIC_EnableIRQ(SD_DMAx_Tx_IRQn);
}

/**
  * @brief  Gets the current SD card data status.
  * @retval Data transfer state.
  *          This value can be one of the following values:
  *            @arg  SD_TRANSFER_OK: No data transfer is acting
  *            @arg  SD_TRANSFER_BUSY: Data transfer is acting
  */
uint8_t BSP_SD_GetCardState(void)
{
  return((HAL_SD_GetCardState(&uSdHandle) == HAL_SD_CARD_TRANSFER ) ? SD_TRANSFER_OK : SD_TRANSFER_BUSY);
}
  

/**
  * @brief  Get SD information about specific SD card.
  * @param  CardInfo: Pointer to HAL_SD_CardInfoTypedef structure
  * @retval None 
  */
void BSP_SD_GetCardInfo(HAL_SD_CardInfoTypeDef *CardInfo)
{
  /* Get SD card Information */
  HAL_SD_GetCardInfo(&uSdHandle, CardInfo);
}

/**
  * @brief SD Abort callbacks
  * @param hsd: SD handle
  * @retval None
  */
void HAL_SD_AbortCallback(SD_HandleTypeDef *hsd)
{
  BSP_SD_AbortCallback();
}

/**
  * @brief Tx Transfer completed callbacks
  * @param hsd: SD handle
  * @retval None
  */
void HAL_SD_TxCpltCallback(SD_HandleTypeDef *hsd)
{
  BSP_SD_WriteCpltCallback();
}

/**
  * @brief Rx Transfer completed callbacks
  * @param hsd: SD handle
  * @retval None
  */
void HAL_SD_RxCpltCallback(SD_HandleTypeDef *hsd)
{
  BSP_SD_ReadCpltCallback();
}

/**
  * @brief BSP SD Abort callbacks
  * @retval None
  */
__weak void BSP_SD_AbortCallback(void)
{

}

/**
  * @brief BSP Tx Transfer completed callbacks
  * @retval None
  */
__weak void BSP_SD_WriteCpltCallback(void)
{

}

/**
  * @brief BSP Rx Transfer completed callbacks
  * @retval None
  */
__weak void BSP_SD_ReadCpltCallback(void)
{

}

/**
  * @}
  */  

/**
  * @}
  */ 

/**
  * @}
  */ 

/**
  * @}
  */