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117 lines
3.7 KiB
C
117 lines
3.7 KiB
C
/*
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* The Clear BSD License
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* Copyright (c) 2015, Freescale Semiconductor, Inc.
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* Copyright 2016 NXP
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* All rights reserved.
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*
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted (subject to the limitations in the disclaimer below) provided
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* that the following conditions are met:
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*
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* o Redistributions of source code must retain the above copyright notice, this list
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* of conditions and the following disclaimer.
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*
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* o Redistributions in binary form must reproduce the above copyright notice, this
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* list of conditions and the following disclaimer in the documentation and/or
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* other materials provided with the distribution.
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*
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* o Neither the name of the copyright holder nor the names of its
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* contributors may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED BY THIS LICENSE.
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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// #include "fsl_common.h"
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#include "ff.h"
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#include "ram_disk.h"
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#include "ffconf.h"
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/*******************************************************************************
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* Definitions
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******************************************************************************/
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/* clang-format off */
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#define SECTOR_SIZE 512 /* usualy 512 B */
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#define DISK_SIZE 128*1024 /* minmal disk size calculated as 256 * _MIN_SS */
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/* clang-format on */
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/*******************************************************************************
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* Globals
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******************************************************************************/
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static uint8_t disk_space[DISK_SIZE];
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/*******************************************************************************
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* Code
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******************************************************************************/
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/*!
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* @brief Get RAM disk status.
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*/
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DSTATUS ram_disk_status(BYTE pdrv)
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{
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return 0;
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}
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/*!
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* @brief Inidialize a RAM disk.
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*/
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DSTATUS ram_disk_initialize(BYTE pdrv)
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{
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return 0;
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}
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/*!
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* @brief Read Sector(s) from RAM disk.
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*/
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DRESULT ram_disk_read(BYTE pdrv, BYTE *buff, DWORD sector, UINT count)
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{
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memcpy(buff, disk_space + sector * SECTOR_SIZE, SECTOR_SIZE * count);
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return RES_OK;
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}
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/*!
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* @brief Write Sector(s) to RAM disk.
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*/
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DRESULT ram_disk_write(BYTE pdrv, const BYTE *buff, DWORD sector, UINT count)
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{
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memcpy(disk_space + sector * SECTOR_SIZE, buff, SECTOR_SIZE * count);
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return RES_OK;
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}
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/*!
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* @brief Miscellaneous RAM disk Functions.
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*/
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DRESULT ram_disk_ioctl(BYTE pdrv, BYTE cmd, void *buff)
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{
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switch (cmd) {
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case GET_SECTOR_COUNT:
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*(uint32_t *)buff = DISK_SIZE / SECTOR_SIZE;
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return RES_OK;
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break;
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case GET_SECTOR_SIZE:
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*(uint32_t *)buff = SECTOR_SIZE;
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return RES_OK;
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break;
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case CTRL_SYNC:
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return RES_OK;
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break;
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default:
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break;
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}
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return RES_PARERR;
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}
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