static USBH_Status USBH_MSC_Handle(USB_OTG_CORE_HANDLE *pdev ,
USBH_DeviceProp_TypeDef *hdev)
{
USBH_Status status = USBH_BUSY;
uint8_t mscStatus = USBH_MSC_BUSY;
uint8_t appliStatus = 0;
static uint8_t maxLunExceed = FALSE;
if(HCD_IsDeviceConnected(&USB_OTG_FS_dev))
{
switch(USBH_MSC_BOTXferParam.MSCState)
{
case USBH_MSC_BOT_INIT_STATE:
USBH_MSC_Init();
USBH_MSC_BOTXferParam.MSCState = USBH_MSC_BOT_RESET;
break;
case USBH_MSC_BOT_RESET:
/* Issue BOT RESET request */
status = USBH_MSC_BOTReset(pdev);
if(status == USBH_OK )
{
USBH_MSC_BOTXferParam.MSCState = USBH_MSC_GET_MAX_LUN;
}
if(status == USBH_NOT_SUPPORTED )
{
/* If the Command has failed, then we need to move to Next State, after
STALL condition is cleared by Control-Transfer */
USBH_MSC_BOTXferParam.MSCStateBkp = USBH_MSC_GET_MAX_LUN;
/* a Clear Feature should be issued here */
USBH_MSC_BOTXferParam.MSCState = USBH_MSC_CTRL_ERROR_STATE;
}
break;
case USBH_MSC_GET_MAX_LUN:
/* Issue GetMaxLUN request */
status = USBH_MSC_GETMaxLUN(pdev);
if(status == USBH_OK )
{
MSC_Machine.maxLun = *(MSC_Machine.buff) ;
/* If device has more that one logical unit then it is not supported */
if((MSC_Machine.maxLun > 0) && (maxLunExceed == FALSE))
{
maxLunExceed = TRUE;
USBH_Machine.usr_cb->USBH_USR_DeviceNotSupported();
break;
}
USBH_MSC_BOTXferParam.MSCState = USBH_MSC_TEST_UNIT_READY;
}
if(status == USBH_NOT_SUPPORTED )
{
/* If the Command has failed, then we need to move to Next State, after
STALL condition is cleared by Control-Transfer */
USBH_MSC_BOTXferParam.MSCStateBkp = USBH_MSC_TEST_UNIT_READY;
/* a Clear Feature should be issued here */
USBH_MSC_BOTXferParam.MSCState = USBH_MSC_CTRL_ERROR_STATE;
}
break;
case USBH_MSC_CTRL_ERROR_STATE:
/* Issue Clearfeature request */
status = USBH_ClrFeature(pdev,
0x00,
USBH_Machine.Control.hc_num_out);
if(status == USBH_OK )
{
/* If GetMaxLun Request not support, assume Single LUN configuration */
MSC_Machine.maxLun = 0;
USBH_MSC_BOTXferParam.MSCState = USBH_MSC_BOTXferParam.MSCStateBkp;
}
break;
case USBH_MSC_TEST_UNIT_READY:
/* Issue SCSI command TestUnitReady */
mscStatus = USBH_MSC_TestUnitReady();
if(mscStatus == USBH_MSC_OK )
{
USBH_MSC_BOTXferParam.MSCState = USBH_MSC_READ_CAPACITY10;
MSCErrorCount = 0;
status = USBH_OK;
}
else
{
USBH_MSC_ErrorHandle(mscStatus);
}
break;
case USBH_MSC_READ_CAPACITY10:
/* Issue READ_CAPACITY10 SCSI command */
mscStatus = USBH_MSC_ReadCapacity10();
if(mscStatus == USBH_MSC_OK )
{
USBH_MSC_BOTXferParam.MSCState = USBH_MSC_MODE_SENSE6;
MSCErrorCount = 0;
status = USBH_OK;
}
else
{
USBH_MSC_ErrorHandle(mscStatus);
}
break;
case USBH_MSC_MODE_SENSE6:
/* Issue ModeSense6 SCSI command for detecting if device is write-protected */
mscStatus = USBH_MSC_ModeSense6();
if(mscStatus == USBH_MSC_OK )
{
USBH_MSC_BOTXferParam.MSCState = USBH_MSC_DEFAULT_APPLI_STATE;
MSCErrorCount = 0;
status = USBH_OK;
}
else
{
USBH_MSC_ErrorHandle(mscStatus);
}
break;
case USBH_MSC_REQUEST_SENSE:
/* Issue RequestSense SCSI command for retreiving error code */
mscStatus = USBH_MSC_RequestSense();
if(mscStatus == USBH_MSC_OK )
{
USBH_MSC_BOTXferParam.MSCState = USBH_MSC_BOTXferParam.MSCStateBkp;
status = USBH_OK;
}
else
{
USBH_MSC_ErrorHandle(mscStatus);
}
break;
case USBH_MSC_BOT_USB_TRANSFERS:
/* Process the BOT state machine */
USBH_MSC_HandleBOTXfer();
break;
case USBH_MSC_DEFAULT_APPLI_STATE:
/* Process Application callback for MSC */
appliStatus = USBH_USR_MSC_Application();
if(appliStatus == 0)
{
USBH_MSC_BOTXferParam.MSCState = USBH_MSC_DEFAULT_APPLI_STATE;
}
else if (appliStatus == 1)
{
/* De-init requested from application layer */
status = USBH_APPLY_DEINIT;
}
break;
case USBH_MSC_UNRECOVERED_STATE:
status = USBH_UNRECOVERED_ERROR;
break;
default:
break;
}
}
return status;
}
void EnumerationDone()
{
USB_OTG_BSP_mDelay(500);
USBH_USR_MSC_Application();
}