I use my custom board, the chip is C6748 and I use a eMMC for storage.
The FATFS runs well in my board, C6748 can read/write files in the eMMC. In fact, this board and application has been used for years in our products.
I can also run the USB_DevMsc_lcdkOMAPL138_c674xExampleProject. It uses a ramdisk as example.
It seems very easy to glue the DevMsc and the eMMC Driver. I use the attatched "usbd_mmcsd_glue.c" file, which is found in the ..\packages\ti\drv\usb\example\usb_dev\msc.
But, when the program runs, it abort.
That is because the USBDMSCStorageRead is called from HWI interrupt, while the USBDMSCStorageRead calls MMCSD_read, and it uses SemaphoreP_pend, which cannot be called in HWI.
So, when Assert catches Semaphore_pend calls from Hwi and Swi with non-zero timeout, it abort. As shown in the below photo.
It's very hard for me to modify the USBMSC driver, and it's also very hard for me to modify the MMCSD driver.
Is there any way for me, to solve this problem?
Thank you.
Frank
usbd_mmcsd_glue.c
/**
* \file usbdmscglue.c
*
* \brief This file contains the data structures defining the
* USB mass storage device.
*/
/**
* \copyright Copyright (C) 2017-2019 Texas Instruments Incorporated -
* http://www.ti.com/
*/
/**
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 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.
*
* Neither the name of Texas Instruments Incorporated nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER 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.
*/
/* ========================================================================== */
/* Include Files */
/* ========================================================================== */
#include "types.h"
#include "usblib.h"
#include "usbdevice.h"
#include "usbdmsc.h"
#include "usb_msc_structs.h"
#include <ti/drv/mmcsd/MMCSD.h>
#include <ti/drv/mmcsd/soc/MMCSD_soc.h>
#include "usb-ids.h"
/* ========================================================================== */
/* Macros and Typedefs */
/* ========================================================================== */
#ifdef DEBUG
#define ASSERT(expr) { \
if(!(expr)) \
{ \
__error__(__FILE__, __LINE__); \
} \
}
#else
#define ASSERT(expr)
#endif
#define MMCSD_INSTANCE_SDCARD 0
#define MMCSD_INSTANCE_EMMC 1
#define MMCSD_INSTANCE MMCSD_INSTANCE_EMMC
/* ========================================================================== */
/* Structures and Enums */
/* ========================================================================== */
MMCSD_Handle handle = NULL;
/* ========================================================================== */
/* Internal Function Declarations */
/* ========================================================================== */
/* None */
/* ========================================================================== */
/* Global Variables */
/* ========================================================================== */
/* None */
/* ========================================================================== */
/* Function Definitions */
/* ========================================================================== */
void *
USBDMSCStorageOpen(uint32_t ulDrive)
{
ASSERT(ulDrive == 0);
MMCSD_open(MMCSD_INSTANCE, NULL, &handle);
return((void *)handle);
}
void
USBDMSCStorageClose(void * pvDrive)
{
ASSERT(pvDrive != 0);
/* Clear all flags */
MMCSD_close(handle);
}
uint32_t USBDMSCStorageRead(void * pvDrive,
uint8_t *pucData,
uint32_t ulSector,
uint32_t ulNumBlocks)
{
MMCSD_Error retVal = MMCSD_OK;
ASSERT(pvDrive != 0);
retVal = MMCSD_read(pvDrive, pucData, ulSector, ulNumBlocks);
if (retVal == MMCSD_OK)
{
return(ulNumBlocks * 512);
}
else
{
return 0;
}
}
uint32_t USBDMSCStorageWrite(void * pvDrive,
uint8_t *pucData,
uint32_t ulSector,
uint32_t ulNumBlocks)
{
MMCSD_Error retVal = MMCSD_OK;
ASSERT(pvDrive != 0);
retVal = MMCSD_write(pvDrive, pucData, ulSector, ulNumBlocks);
if (retVal == MMCSD_OK)
return(ulNumBlocks * 512);
else
return 0;
}
uint64_t
USBDMSCStorageNumBlocks(void * pvDrive)
{
MMCSD_mediaParams mediaParams;
MMCSD_Error ret;
uint64_t ulSectorCount = 0;
ret=MMCSD_control(handle, MMCSD_CMD_GETMEDIAPARAMS, (void *)&mediaParams);
if(ret != MMCSD_OK)
{
return 0;
}
//consolePrintf("SD Card: BlockSize = %d, BlockCount = %d, CardSize = %d\n",
// mediaParams.blockSize, mediaParams.blockCount, mediaParams.size);
ulSectorCount = mediaParams.blockCount;
return(ulSectorCount);
}
/* -------------------------------------------------------------------------- */
/* Internal Function Definitions */
/* -------------------------------------------------------------------------- */
/* None */
