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/**
******************************************************************************
* @file USB_Device/MSC_Standalone/Src/usbd_storage.c
* @author MCD Application Team
* @brief Memory management layer
******************************************************************************
* @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.
*
******************************************************************************
*/
/* Includes ------------------------------------------------------------------ */
#include "usbd_storage.h"
#include "stm32412g_discovery_sd.h"
/* Private typedef ----------------------------------------------------------- */
/* Private define ------------------------------------------------------------ */
#define STORAGE_LUN_NBR 1
#define STORAGE_BLK_NBR 0x10000
#define STORAGE_BLK_SIZ 0x200
/* Private macro ------------------------------------------------------------- */
/* Private variables --------------------------------------------------------- */
/* USB Mass storage Standard Inquiry Data */
int8_t STORAGE_Inquirydata[] = { /* 36 */
/* LUN 0 */
0x00,
0x80,
0x02,
0x02,
(STANDARD_INQUIRY_DATA_LEN - 5),
0x00,
0x00,
0x00,
'S', 'T', 'M', ' ', ' ', ' ', ' ', ' ', /* Manufacturer: 8 bytes */
'P', 'r', 'o', 'd', 'u', 'c', 't', ' ', /* Product : 16 Bytes */
' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ',
'0', '.', '0', '1', /* Version : 4 Bytes */
};
/* Private function prototypes ----------------------------------------------- */
int8_t STORAGE_Init(uint8_t lun);
int8_t STORAGE_GetCapacity(uint8_t lun, uint32_t * block_num,
uint16_t * block_size);
int8_t STORAGE_IsReady(uint8_t lun);
int8_t STORAGE_IsWriteProtected(uint8_t lun);
int8_t STORAGE_Read(uint8_t lun, uint8_t * buf, uint32_t blk_addr,
uint16_t blk_len);
int8_t STORAGE_Write(uint8_t lun, uint8_t * buf, uint32_t blk_addr,
uint16_t blk_len);
int8_t STORAGE_GetMaxLun(void);
USBD_StorageTypeDef USBD_DISK_fops = {
STORAGE_Init,
STORAGE_GetCapacity,
STORAGE_IsReady,
STORAGE_IsWriteProtected,
STORAGE_Read,
STORAGE_Write,
STORAGE_GetMaxLun,
STORAGE_Inquirydata,
};
/* Private functions --------------------------------------------------------- */
/**
* @brief Initializes the storage unit (medium)
* @param lun: Logical unit number
* @retval Status (0 : OK / -1 : Error)
*/
int8_t STORAGE_Init(uint8_t lun)
{
BSP_SD_Init();
return 0;
}
/**
* @brief Returns the medium capacity.
* @param lun: Logical unit number
* @param block_num: Number of total block number
* @param block_size: Block size
* @retval Status (0: OK / -1: Error)
*/
int8_t STORAGE_GetCapacity(uint8_t lun, uint32_t * block_num,
uint16_t * block_size)
{
BSP_SD_CardInfo info;
int8_t ret = -1;
if (BSP_SD_IsDetected() != SD_NOT_PRESENT)
{
BSP_SD_GetCardInfo(&info);
*block_num = info.LogBlockNbr - 1;
*block_size = info.LogBlockSize;
ret = 0;
}
return ret;
}
/**
* @brief Checks whether the medium is ready.
* @param lun: Logical unit number
* @retval Status (0: OK / -1: Error)
*/
int8_t STORAGE_IsReady(uint8_t lun)
{
static int8_t prev_status = 0;
int8_t ret = -1;
if (BSP_SD_IsDetected() != SD_NOT_PRESENT)
{
if (prev_status < 0)
{
BSP_SD_Init();
prev_status = 0;
}
if (BSP_SD_GetCardState() == SD_TRANSFER_OK)
{
ret = 0;
}
}
else if (prev_status == 0)
{
prev_status = -1;
}
return ret;
}
/**
* @brief Checks whether the medium is write protected.
* @param lun: Logical unit number
* @retval Status (0: write enabled / -1: otherwise)
*/
int8_t STORAGE_IsWriteProtected(uint8_t lun)
{
return 0;
}
/**
* @brief Reads data from the medium.
* @param lun: Logical unit number
* @param blk_addr: Logical block address
* @param blk_len: Blocks number
* @retval Status (0: OK / -1: Error)
*/
int8_t STORAGE_Read(uint8_t lun, uint8_t * buf, uint32_t blk_addr,
uint16_t blk_len)
{
int8_t ret = -1;
uint32_t timeout = 100000;
if (BSP_SD_IsDetected() != SD_NOT_PRESENT)
{
BSP_SD_ReadBlocks((uint32_t *) buf, blk_addr, blk_len, 1000);
/* Wait until SD card is ready to use for new operation */
while (BSP_SD_GetCardState() != SD_TRANSFER_OK)
{
if (timeout-- == 0)
{
return ret;
}
}
ret = 0;
}
return ret;
}
/**
* @brief Writes data into the medium.
* @param lun: Logical unit number
* @param blk_addr: Logical block address
* @param blk_len: Blocks number
* @retval Status (0 : OK / -1 : Error)
*/
int8_t STORAGE_Write(uint8_t lun, uint8_t * buf, uint32_t blk_addr,
uint16_t blk_len)
{
int8_t ret = -1;
uint32_t timeout = 100000;
if (BSP_SD_IsDetected() != SD_NOT_PRESENT)
{
BSP_SD_WriteBlocks((uint32_t *) buf, blk_addr, blk_len, 1000);
/* Wait until SD card is ready to use for new operation */
while (BSP_SD_GetCardState() != SD_TRANSFER_OK)
{
if (timeout-- == 0)
{
return ret;
}
}
ret = 0;
}
return ret;
}
/**
* @brief Returns the Max Supported LUNs.
* @param None
* @retval Lun(s) number
*/
int8_t STORAGE_GetMaxLun(void)
{
return (STORAGE_LUN_NBR - 1);
}