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Fixed Mass Storage Host Class driver and Low Level demo not clearing the error condition if an attached device returns a STALL to a GET MAX LUN request (thanks to Martin Luxen).

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This commit is contained in:
Dean Camera
2009-12-04 09:08:48 +00:00
parent 478d9dc04f
commit c49bdcb7c9
4 changed files with 20 additions and 4 deletions
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11
Demos/Host/LowLevel/MassStorageHost/Lib/MassStoreCommands.c
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@@ -287,13 +287,17 @@ uint8_t MassStore_MassStorageReset(void)
/** Issues a Mass Storage class specific request to determine the index of the highest numbered Logical
* Unit in the attached device.
*
* \note Some devices do not support this request, and will STALL it when issued. To get around this,
* on unsupported devices the max LUN index will be reported as zero and no error will be returned
* if the device STALLs the request.
*
* \param[out] MaxLUNIndex Pointer to the location that the maximum LUN index value should be stored
*
* \return A value from the USB_Host_SendControlErrorCodes_t enum, or MASS_STORE_SCSI_COMMAND_FAILED if the SCSI command fails
*/
uint8_t MassStore_GetMaxLUN(uint8_t* const MaxLUNIndex)
{
uint8_t ErrorCode;
uint8_t ErrorCode = HOST_SENDCONTROL_Successful;
USB_ControlRequest = (USB_Request_Header_t)
{
@@ -313,7 +317,10 @@ uint8_t MassStore_GetMaxLUN(uint8_t* const MaxLUNIndex)
Pipe_ClearStall();
/* Some faulty Mass Storage devices don't implement the GET_MAX_LUN request, so assume a single LUN */
*MaxLUNIndex = 0;
*MaxLUNIndex = 0;
/* Clear the error, and pretend the request executed correctly if the device STALLed it */
ErrorCode = HOST_SENDCONTROL_Successful;
}
return ErrorCode;