207 lines
6.6 KiB
C
207 lines
6.6 KiB
C
/**
|
||
******************************************************************************
|
||
* @file sdram_diskio_template.c
|
||
* @author MCD Application Team
|
||
* @version V2.0.2
|
||
* @date 10-November-2017
|
||
* @brief SDRAM Disk I/O template driver.This file needs to be copied under
|
||
the application project alongside the respective header file.
|
||
******************************************************************************
|
||
* @attention
|
||
*
|
||
* <h2><center>© Copyright (c) 2017 STMicroelectronics International N.V.
|
||
* All rights reserved.</center></h2>
|
||
*
|
||
* Redistribution and use in source and binary forms, with or without
|
||
* modification, are permitted, provided that the following conditions are met:
|
||
*
|
||
* 1. Redistribution 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 other
|
||
* contributors to this software may be used to endorse or promote products
|
||
* derived from this software without specific written permission.
|
||
* 4. This software, including modifications and/or derivative works of this
|
||
* software, must execute solely and exclusively on microcontroller or
|
||
* microprocessor devices manufactured by or for STMicroelectronics.
|
||
* 5. Redistribution and use of this software other than as permitted under
|
||
* this license is void and will automatically terminate your rights under
|
||
* this license.
|
||
*
|
||
* THIS SOFTWARE IS PROVIDED BY STMICROELECTRONICS AND CONTRIBUTORS "AS IS"
|
||
* AND ANY EXPRESS, IMPLIED OR STATUTORY WARRANTIES, INCLUDING, BUT NOT
|
||
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
|
||
* PARTICULAR PURPOSE AND NON-INFRINGEMENT OF THIRD PARTY INTELLECTUAL PROPERTY
|
||
* RIGHTS ARE DISCLAIMED TO THE FULLEST EXTENT PERMITTED BY LAW. IN NO EVENT
|
||
* SHALL STMICROELECTRONICS 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 "ff_gen_drv.h"
|
||
#include "sdram_diskio.h"
|
||
|
||
/* <20><><EFBFBD><EFBFBD>SDRAM <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>̵ĵ<CCB5>ַ<EFBFBD>Ϳռ䡣 4M<34>ֽ<EFBFBD> */
|
||
#define SDRAM_DEVICE_ADDR SDRAM_APP_BUF
|
||
#define SDRAM_DEVICE_SIZE (4 * 1024 * 1024)
|
||
|
||
/* Private typedef -----------------------------------------------------------*/
|
||
/* Private define ------------------------------------------------------------*/
|
||
/* Block Size in Bytes */
|
||
#define BLOCK_SIZE 512
|
||
|
||
/* Private variables ---------------------------------------------------------*/
|
||
/* Disk status */
|
||
static volatile DSTATUS Stat = STA_NOINIT;
|
||
|
||
/* Private function prototypes -----------------------------------------------*/
|
||
DSTATUS SDRAMDISK_initialize (BYTE);
|
||
DSTATUS SDRAMDISK_status (BYTE);
|
||
DRESULT SDRAMDISK_read (BYTE, BYTE*, DWORD, UINT);
|
||
#if _USE_WRITE == 1
|
||
DRESULT SDRAMDISK_write (BYTE, const BYTE*, DWORD, UINT);
|
||
#endif /* _USE_WRITE == 1 */
|
||
#if _USE_IOCTL == 1
|
||
DRESULT SDRAMDISK_ioctl (BYTE, BYTE, void*);
|
||
#endif /* _USE_IOCTL == 1 */
|
||
|
||
const Diskio_drvTypeDef SDRAMDISK_Driver =
|
||
{
|
||
SDRAMDISK_initialize,
|
||
SDRAMDISK_status,
|
||
SDRAMDISK_read,
|
||
#if _USE_WRITE
|
||
SDRAMDISK_write,
|
||
#endif /* _USE_WRITE == 1 */
|
||
#if _USE_IOCTL == 1
|
||
SDRAMDISK_ioctl,
|
||
#endif /* _USE_IOCTL == 1 */
|
||
};
|
||
|
||
/* Private functions ---------------------------------------------------------*/
|
||
|
||
/**
|
||
* @brief Initializes a Drive
|
||
* @param lun : not used
|
||
* @retval DSTATUS: Operation status
|
||
*/
|
||
DSTATUS SDRAMDISK_initialize(BYTE lun)
|
||
{
|
||
return RES_OK;
|
||
}
|
||
|
||
/**
|
||
* @brief Gets Disk Status
|
||
* @param lun : not used
|
||
* @retval DSTATUS: Operation status
|
||
*/
|
||
DSTATUS SDRAMDISK_status(BYTE lun)
|
||
{
|
||
return Stat;
|
||
}
|
||
|
||
/**
|
||
* @brief Reads Sector(s)
|
||
* @param lun : not used
|
||
* @param *buff: Data buffer to store read data
|
||
* @param sector: Sector address (LBA)
|
||
* @param count: Number of sectors to read (1..128)
|
||
* @retval DRESULT: Operation result
|
||
*/
|
||
DRESULT SDRAMDISK_read(BYTE lun, BYTE *buff, DWORD sector, UINT count)
|
||
{
|
||
uint32_t *pSrcBuffer = (uint32_t *)buff;
|
||
uint32_t BufferSize = (BLOCK_SIZE * count)/4;
|
||
uint32_t *pSdramAddress = (uint32_t *) (SDRAM_DEVICE_ADDR + (sector * BLOCK_SIZE));
|
||
|
||
for(; BufferSize != 0; BufferSize--)
|
||
{
|
||
*pSrcBuffer++ = *(__IO uint32_t *)pSdramAddress++;
|
||
}
|
||
|
||
return RES_OK;
|
||
}
|
||
|
||
/**
|
||
* @brief Writes Sector(s)
|
||
* @param lun : not used
|
||
* @param *buff: Data to be written
|
||
* @param sector: Sector address (LBA)
|
||
* @param count: Number of sectors to write (1..128)
|
||
* @retval DRESULT: Operation result
|
||
*/
|
||
#if _USE_WRITE == 1
|
||
DRESULT SDRAMDISK_write(BYTE lun, const BYTE *buff, DWORD sector, UINT count)
|
||
{
|
||
uint32_t *pDstBuffer = (uint32_t *)buff;
|
||
uint32_t BufferSize = (BLOCK_SIZE * count)/4;
|
||
uint32_t *pSramAddress = (uint32_t *) (SDRAM_DEVICE_ADDR + (sector * BLOCK_SIZE));
|
||
|
||
for(; BufferSize != 0; BufferSize--)
|
||
{
|
||
*(__IO uint32_t *)pSramAddress++ = *pDstBuffer++;
|
||
}
|
||
|
||
return RES_OK;
|
||
}
|
||
#endif /* _USE_WRITE == 1 */
|
||
|
||
/**
|
||
* @brief I/O control operation
|
||
* @param lun : not used
|
||
* @param cmd: Control code
|
||
* @param *buff: Buffer to send/receive control data
|
||
* @retval DRESULT: Operation result
|
||
*/
|
||
#if _USE_IOCTL == 1
|
||
DRESULT SDRAMDISK_ioctl(BYTE lun, BYTE cmd, void *buff)
|
||
{
|
||
DRESULT res = RES_ERROR;
|
||
|
||
if (Stat & STA_NOINIT) return RES_NOTRDY;
|
||
|
||
switch (cmd)
|
||
{
|
||
/* Make sure that no pending write process */
|
||
case CTRL_SYNC :
|
||
res = RES_OK;
|
||
break;
|
||
|
||
/* Get number of sectors on the disk (DWORD) */
|
||
case GET_SECTOR_COUNT :
|
||
*(DWORD*)buff = SDRAM_DEVICE_SIZE / BLOCK_SIZE;
|
||
res = RES_OK;
|
||
break;
|
||
|
||
/* Get R/W sector size (WORD) */
|
||
case GET_SECTOR_SIZE :
|
||
*(WORD*)buff = BLOCK_SIZE;
|
||
res = RES_OK;
|
||
break;
|
||
|
||
/* Get erase block size in unit of sector (DWORD) */
|
||
case GET_BLOCK_SIZE :
|
||
*(DWORD*)buff = 1;
|
||
res = RES_OK;
|
||
break;
|
||
|
||
default:
|
||
res = RES_PARERR;
|
||
}
|
||
|
||
return res;
|
||
}
|
||
#endif /* _USE_IOCTL == 1 */
|
||
|
||
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
|
||
|