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usbd_msc_storage.c
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usbd_msc_storage.c
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/**
******************************************************************************
* @file usbd_msc_storage_template.c
* @author MCD Application Team
* @brief Memory management layer
******************************************************************************
* @attention
*
* <h2><center>© Copyright (c) 2015 STMicroelectronics.
* All rights reserved.</center></h2>
*
* This software component is licensed by ST under Ultimate Liberty license
* SLA0044, the "License"; You may not use this file except in compliance with
* the License. You may obtain a copy of the License at:
* www.st.com/SLA0044
*
******************************************************************************
*/
/* BSPDependencies
- "stm32xxxxx_{eval}{discovery}{nucleo_144}.c"
- "stm32xxxxx_{eval}{discovery}_io.c"
- "stm32xxxxx_{eval}{discovery}{adafruit}_sd.c"
EndBSPDependencies */
/* Includes ------------------------------------------------------------------*/
#include "usbd_msc_storage_template.h"
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/* Extern function prototypes ------------------------------------------------*/
/* Private functions ---------------------------------------------------------*/
#define STORAGE_LUN_NBR 1U
#define STORAGE_BLK_NBR 0x40000U // 128MB
#define STORAGE_BLK_SIZ 0x200U
static __attribute__((section(".virtdrive"))) uint8_t virtdrive[STORAGE_BLK_NBR * STORAGE_BLK_SIZ];
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);
/* USB Mass storage Standard Inquiry Data */
int8_t STORAGE_Inquirydata[] = /* 36 */
{
// clang-format off
/* 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 */
// clang-format on
};
USBD_StorageTypeDef USBD_MSC_fops = {
STORAGE_Init,
STORAGE_GetCapacity,
STORAGE_IsReady,
STORAGE_IsWriteProtected,
STORAGE_Read,
STORAGE_Write,
STORAGE_GetMaxLun,
STORAGE_Inquirydata,
};
/*******************************************************************************
* Function Name : Read_Memory
* Description : Handle the Read operation from the microSD card.
* Input : None.
* Output : None.
* Return : None.
*******************************************************************************/
int8_t STORAGE_Init(uint8_t lun)
{
return (USBD_OK);
}
/*******************************************************************************
* Function Name : Read_Memory
* Description : Handle the Read operation from the STORAGE card.
* Input : None.
* Output : None.
* Return : None.
*******************************************************************************/
int8_t STORAGE_GetCapacity(uint8_t lun, uint32_t *block_num, uint16_t *block_size)
{
*block_num = STORAGE_BLK_NBR;
*block_size = STORAGE_BLK_SIZ;
return (USBD_OK);
}
/*******************************************************************************
* Function Name : Read_Memory
* Description : Handle the Read operation from the STORAGE card.
* Input : None.
* Output : None.
* Return : None.
*******************************************************************************/
int8_t STORAGE_IsReady(uint8_t lun)
{
return USBD_OK;
}
/*******************************************************************************
* Function Name : Read_Memory
* Description : Handle the Read operation from the STORAGE card.
* Input : None.
* Output : None.
* Return : None.
*******************************************************************************/
int8_t STORAGE_IsWriteProtected(uint8_t lun)
{
return USBD_OK;
}
/*******************************************************************************
* Function Name : Read_Memory
* Description : Handle the Read operation from the STORAGE card.
* Input : None.
* Output : None.
* Return : None.
*******************************************************************************/
int8_t STORAGE_Read(uint8_t lun, uint8_t *buf, uint32_t blk_addr, uint16_t blk_len)
{
for (uint16_t i = 0; i < (blk_len * STORAGE_BLK_SIZ); i++)
buf[i] = virtdrive[blk_addr * STORAGE_BLK_SIZ + i];
return USBD_OK;
}
/*******************************************************************************
* Function Name : Write_Memory
* Description : Handle the Write operation to the STORAGE card.
* Input : None.
* Output : None.
* Return : None.
*******************************************************************************/
int8_t STORAGE_Write(uint8_t lun, uint8_t *buf, uint32_t blk_addr, uint16_t blk_len)
{
for (uint16_t i = 0; i < (blk_len * STORAGE_BLK_SIZ); i++)
virtdrive[blk_addr * STORAGE_BLK_SIZ + i] = buf[i];
return USBD_OK;
}
/*******************************************************************************
* Function Name : Write_Memory
* Description : Handle the Write operation to the STORAGE card.
* Input : None.
* Output : None.
* Return : None.
*******************************************************************************/
int8_t STORAGE_GetMaxLun(void)
{
return (STORAGE_LUN_NBR - 1);
}
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/