RTOS/PROCESSOR-SDK-AM437X: FAT volume size issue

Marko Kastelic

Tool/software: TI-RTOS

Hi,

I'm trying to make f_mkfs() work on TI-RTOS.
I define :

#define	_USE_MKFS		1

in ffconf.h.

In example I add:

FATFS_DrvFxnTable FATFS_drvFxnTable = {
    MMCSD_close,
	CS_eMMC_control,//MMCSD_control
    MMCSD_init,
    MMCSD_open,
    MMCSD_write,
    MMCSD_read
};

In IOctr function, sector and block data reports was impelmented:

MMCSD_Error CS_eMMC_control(MMCSD_Handle handle, uint32_t cmd, void *arg){
//	MMCSD_OK
	MMCSD_v1_Object            *object = NULL;
	DWORD *tmp;
	tmp = arg;
    /* Input parameter validation */
    OSAL_Assert(handle == NULL);

    object = (MMCSD_v1_Object *)((MMCSD_Config *) handle)->object;

    switch(cmd){
    case CTRL_SYNC:
    	//check
    	return FATFS_OK;
    	break;
    case GET_SECTOR_COUNT:
    		*tmp = (DWORD)object->size / (DWORD)object->blockSize;
    	return FATFS_OK;
    	break;
    case GET_SECTOR_SIZE:
    	*tmp = (DWORD)object->blockSize;
    	return FATFS_OK;
    	break;
    case GET_BLOCK_SIZE:
    	*tmp = (DWORD)object->blockSize;
    	return FATFS_OK;
    	break;
    case CTRL_TRIM:
    	return FATFS_OK;
    	break;
    case CTRL_EJECT:
    	return MMCSD_close(handle);
    	break;
    default:
    	break;
    }
    return (((MMCSD_Config *) handle)->fxnTablePtr->controlFxn(handle, cmd, arg));
}

f_mkfs() make partition of approx. size 1.7MB or it fail to make filesiystem....

Any knowing issues?

Best Regards,

Mare

over 7 years ago

0 Biser Gatchev-XID over 7 years ago

TI__Guru**** 393215 points

The RTOS team have been notified. They will respond here.

0 Marko Kastelic over 7 years ago in reply to Biser Gatchev-XID

Expert 1770 points

Hi,

I found bug in f_mkfs():

on line 5333:

	st_word(tbl + BPB_RootEntCnt, (WORD)i);
	if (n_vol < 0x10000) {					/* Number of total sectors */
		st_word(tbl + BPB_TotSec16, (WORD)n_vol);
	} else {
		st_dword(tbl + BPB_TotSec32, (WORD)n_vol);
	}

there is "WORD" cast in case of writing to BPB_TotSec32.
It should be:

st_dword(tbl + BPB_TotSec32, (DWORD)n_vol);

Also I add :

disk_ioctl(drive,CTRL_EJECT,NULL);

in function DRESULT disk_unregister(BYTE drive) (discio.c).
In previews post you can see in CS_eMMC_control() that I add

    case CTRL_EJECT:
    	return MMCSD_close(handle);
    	break;

Without that functionality you can't "FATFS_close" and re-open with FATFS_open.

*****************************************
Now f_mkfs work on SD.
My plan is to use eMMC on instance(1).

I have already problems with working on MMCSD API level:

    if(MMCSD_socGetInitCfg(eMMC_INSTANCE,&hwAttrsConfig)!=0) {
//       MMCSD_log ("\nUnable to obtain MMCSD config.Exiting. TEST FAILED.\r\n");
       return;
    }

    hwAttrsConfig.edmaHandle = NULL;
    hwAttrsConfig.enableDma = 0;
    hwAttrsConfig.enableInterrupt = 0;
//    hwAttrsConfig.edmaHandle = *gEdmaHandle;
    hwAttrsConfig.cardType = MMCSD_CARD_EMMC;
    hwAttrsConfig.supportedBusWidth = MMCSD_BUS_WIDTH_4BIT;
    if(MMCSD_socSetInitCfg(eMMC_INSTANCE,&hwAttrsConfig)!=0) {
//        MMCSD_log ("\nUnable to set config.Exiting. TEST FAILED.\r\n");
         return;
    }
    mmcStat = MMCSD_init();
    mmcStat = MMCSD_open(eMMC_INSTANCE, NULL, &emmc_handle); 
    for(index = 0; index<512;index++){
    	TxBufferMMCTest[index] = (char)index;
    }
    memset(RxBufferMMCTest, 0, 512);
    mmcStat = MMCSD_write(emmc_handle, TxBufferMMCTest , 0x0, 1);
    mmcStat = MMCSD_read(emmc_handle, RxBufferMMCTest , 0x0, 1);

After reading RxBufferMMCTest is empty (0x00).
eMMC init on line 2034 ( MMCSD_v1.c) force busWidth to 8-bit. I have on PCB 4-bit eMMC bus...
I change to 4-bit:

object->busWidth = MMCSD_BUS_WIDTH_4BIT;

but eMMC reading still not work...

Is any particular reason why is for eMMC hard coded 8-bit bus width?

Any suggestion what to check?

Best Regards,
Mare

0 Marko Kastelic over 7 years ago in reply to Marko Kastelic

Expert 1770 points

This is my "working driver fix" in MMCSD_v1_initEmmc:

LINE 2033:
            object->size = (object->blockCount * object->blockSize);
            object->busWidth = MMCSD_BUS_WIDTH_4BIT;
            object->sdVer = object->ecsd[192];

LINE 2038:
        if(MMCSD_OK == ret)
        {
            transaction.cmd = MMCSD_CMD(6U);
            transaction.arg = 0x03B90100;//HS_TIMING
            transaction.flags = MMCSD_CMDRSP_BUSY;
            ret = MMCSD_v1_transfer(handle, &transaction);
        }

LINE 2077:
        if(MMCSD_OK == ret)
        {
            transaction.cmd = MMCSD_CMD(6U);
            transaction.arg = 0x03B70100;//4-bit //0x03B70200;//BUS_WIDTH-> 02 8-bit
            transaction.flags = MMCSD_CMDRSP_BUSY;

            ret = MMCSD_v1_transfer(handle, &transaction);
        }

LINE 2089:
        if (MMCSD_OK == ret)
        {
            HSMMCSDSetBusWidth(hwAttrs->baseAddr, HS_MMCSD_BUS_WIDTH_4BIT);
        }

For those who need change eMMC bus width to 4-bit bus....

I didn't make real stress test with 4-bit bus...
I still waiting on TI replay...
Should I expect any problems? Or why is driver fixed to 8-bus width?

Best Regards,
Mare

0 lding over 7 years ago in reply to Marko Kastelic

TI__Guru* 95265 points

Sorry, we are looking into this and will reply here.

Regards, Eric

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RTOS/PROCESSOR-SDK-AM437X: FAT volume size issue