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Added new USB_DeviceState variable to keep track of the current Device mode USB state.

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Added new Endpoint_ClearStatusStage() convenience function to assist with the status stages of control transfers.

Removed vague USB_IsConnected global - test USB_DeviceState or USB_HostState explicitly to gain previous functionality.

Removed USB_IsSuspended global - test USB_DeviceState against DEVICE_STATE_Suspended instead.

Fixed possible enumeration errors from spinloops which may fail to exit if the USB connection is severed before the exit condition becomes true.
This commit is contained in:
Dean Camera 2009-07-21 13:31:21 +00:00
parent 44179abcf8
commit e071f3897a
58 changed files with 666 additions and 463 deletions
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114
Demos/Device/LowLevel/MassStorage/MassStorage.c
View file

@ -142,9 +142,7 @@ void EVENT_USB_UnhandledControlPacket(void)
/* Indicate that the current transfer should be aborted */
IsMassStoreReset = true;
/* Acknowledge status stage */
while (!(Endpoint_IsINReady()));
Endpoint_ClearIN();
Endpoint_ClearStatusStage();
}
break;
@ -158,9 +156,7 @@ void EVENT_USB_UnhandledControlPacket(void)
Endpoint_ClearIN();
/* Acknowledge status stage */
while (!(Endpoint_IsOUTReceived()));
Endpoint_ClearOUT();
Endpoint_ClearStatusStage();
}
break;
@ -172,67 +168,67 @@ void EVENT_USB_UnhandledControlPacket(void)
*/
void MassStorage_Task(void)
{
/* Check if the USB System is connected to a Host */
if (USB_IsConnected)
/* Device must be connected and configured for the task to run */
if (USB_DeviceState != DEVICE_STATE_Configured)
return;
/* Select the Data Out Endpoint */
Endpoint_SelectEndpoint(MASS_STORAGE_OUT_EPNUM);
/* Check to see if a command from the host has been issued */
if (Endpoint_IsReadWriteAllowed())
{
/* Select the Data Out Endpoint */
Endpoint_SelectEndpoint(MASS_STORAGE_OUT_EPNUM);
/* Check to see if a command from the host has been issued */
if (Endpoint_IsReadWriteAllowed())
/* Indicate busy */
LEDs_SetAllLEDs(LEDMASK_USB_BUSY);
/* Process sent command block from the host */
if (ReadInCommandBlock())
{
/* Indicate busy */
LEDs_SetAllLEDs(LEDMASK_USB_BUSY);
/* Check direction of command, select Data IN endpoint if data is from the device */
if (CommandBlock.Flags & COMMAND_DIRECTION_DATA_IN)
Endpoint_SelectEndpoint(MASS_STORAGE_IN_EPNUM);
/* Process sent command block from the host */
if (ReadInCommandBlock())
/* Decode the received SCSI command */
SCSI_DecodeSCSICommand();
/* Load in the CBW tag into the CSW to link them together */
CommandStatus.Tag = CommandBlock.Tag;
/* Load in the data residue counter into the CSW */
CommandStatus.DataTransferResidue = CommandBlock.DataTransferLength;
/* Stall the selected data pipe if command failed (if data is still to be transferred) */
if ((CommandStatus.Status == Command_Fail) && (CommandStatus.DataTransferResidue))
Endpoint_StallTransaction();
/* Return command status block to the host */
ReturnCommandStatus();
/* Check if a Mass Storage Reset occurred */
if (IsMassStoreReset)
{
/* Check direction of command, select Data IN endpoint if data is from the device */
if (CommandBlock.Flags & COMMAND_DIRECTION_DATA_IN)
Endpoint_SelectEndpoint(MASS_STORAGE_IN_EPNUM);
/* Decode the received SCSI command */
SCSI_DecodeSCSICommand();
/* Load in the CBW tag into the CSW to link them together */
CommandStatus.Tag = CommandBlock.Tag;
/* Load in the data residue counter into the CSW */
CommandStatus.DataTransferResidue = CommandBlock.DataTransferLength;
/* Stall the selected data pipe if command failed (if data is still to be transferred) */
if ((CommandStatus.Status == Command_Fail) && (CommandStatus.DataTransferResidue))
Endpoint_StallTransaction();
/* Return command status block to the host */
ReturnCommandStatus();
/* Reset the data endpoint banks */
Endpoint_ResetFIFO(MASS_STORAGE_OUT_EPNUM);
Endpoint_ResetFIFO(MASS_STORAGE_IN_EPNUM);
/* Check if a Mass Storage Reset occurred */
if (IsMassStoreReset)
{
/* Reset the data endpoint banks */
Endpoint_ResetFIFO(MASS_STORAGE_OUT_EPNUM);
Endpoint_ResetFIFO(MASS_STORAGE_IN_EPNUM);
Endpoint_SelectEndpoint(MASS_STORAGE_OUT_EPNUM);
Endpoint_ClearStall();
Endpoint_SelectEndpoint(MASS_STORAGE_IN_EPNUM);
Endpoint_ClearStall();
}
Endpoint_SelectEndpoint(MASS_STORAGE_OUT_EPNUM);
Endpoint_ClearStall();
Endpoint_SelectEndpoint(MASS_STORAGE_IN_EPNUM);
Endpoint_ClearStall();
}
/* Indicate ready */
LEDs_SetAllLEDs(LEDMASK_USB_READY);
}
else
{
/* Indicate error reading in the command block from the host */
LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
}
/* Indicate ready */
LEDs_SetAllLEDs(LEDMASK_USB_READY);
}
else
{
/* Indicate error reading in the command block from the host */
LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
}
/* Clear the abort transfer flag */
IsMassStoreReset = false;
}
/* Clear the abort transfer flag */
IsMassStoreReset = false;
}
/** Function to read in a command block from the host, via the bulk data OUT endpoint. This function reads in the next command block