StarterWare AM335X SD card and MSC problem

user4181497,

Please download and try out the mmcsd_app_fs_shell test project from the latest ProcessorSDK package. Its location is:

C:\ti\pdk_am335x_1_0_0\packages\ti\starterware\examples\mmcsd\fs_shell\ccs

I believe this SD card example is what you are looking for on the AM335xSK. Hope this helps.

Lali

hi Lali,

thanks for your reply, but the problem is still remain

I combine two example "hs_mmcsd" and "usb_dev_msc" from AM335X_StarterWare_02_00_01_01  to make SD card as USB Mass storage device

and it is a non OS system ,so your suggest is not for my question.

and following is my code 

int main(void)
{
/* Setup the MMU and do necessary MMU configurations. */

MMUConfigAndEnable();

/* Enable all levels of CACHE. */
CacheEnable(CACHE_ALL);

/* Initialize console for communication with the Host Machine */
ConsoleUtilsInit();
ConsoleUtilsSetType(CONSOLE_UART);

USB0ModuleClkConfig();

USBInterruptEnable();
DelayTimerSetup();
/* Configuring AINTC to receive USB interrupts. */

UPDNPinControl();

g_ulIdleTimeout = USBMSC_ACTIVITY_TIMEOUT;
g_ulFlags = 0;
g_eMSCState = MSC_DEV_IDLE;

USBDMSCInit(0, (tUSBDMSCDevice *)&g_sMSCDevice);

#ifdef DMA_MODE
Cppi41DmaInit(USB_INSTANCE, epInfo, NUMBER_OF_ENDPOINTS);

for(;g_bufferIndex < NUM_OF_RX_BDs; g_bufferIndex++)
{
dataBuffer = (unsigned char *)cppiDmaAllocBuffer();
doDmaRxTransfer(USB_INSTANCE, USB_MSC_BUFER_SIZE, dataBuffer,
g_sMSCDevice.psPrivateData->ucOUTEndpoint);
}
#endif
/* Configure the EDMA clocks. */

EDMAModuleClkConfig();

/* Configure EDMA to service the HSMMCSD events. */
HSMMCSDEdmaInit();

/* Perform pin-mux for HSMMCSD pins. */
HSMMCSDPinMuxSetup();

/* Enable module clock for HSMMCSD. */
HSMMCSDModuleClkConfig();

DelayTimerSetup();

/* Basic controller initializations */
HSMMCSDControllerSetup();

/* Initialize the MMCSD controller */
MMCSDCtrlInit(&ctrlInfo);

MMCSDIntEnable(&ctrlInfo);
if((HSMMCSDCardPresent(&ctrlInfo)) == 1)
{
if(initFlg)
{
HSMMCSDFsMount(0, &sdCard);
initFlg = 0;
}
}
while(1){

if(g_ulIdleTimeout != 0)
{
g_ulIdleTimeout--;
}
g_ulIdleTimeout = USBMSC_ACTIVITY_TIMEOUT;
}
}

 and the disk read for sd card is just like following code

DRESULT disk_read (

BYTE drv, /* Physical drive number (0) */
BYTE* buff, /* Pointer to the data buffer to store read data */
DWORD sector, /* Physical drive nmuber (0) */
BYTE count) /* Sector count (1..255) */
{
if (drv == DRIVE_NUM_MMCSD)
{
mmcsdCardInfo *card = fat_devices[drv].dev;
/* READ BLOCK */
// ConsoleUtilsPrintf(" disk_read here\n");

if (MMCSDReadCmdSend(card->ctrl, buff, sector, count) == 1)
{
// ConsoleUtilsPrintf(" disk_read ok\n");
return RES_OK;
}
}
return RES_ERROR;
}

and the MSC system is always crash at MMCSDReadCmdSend 

thank you