e071f3897a
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.
52 lines
No EOL
1.3 KiB
C
52 lines
No EOL
1.3 KiB
C
uint8_t TEMPLATE_FUNC_NAME (void* Buffer, uint16_t Length)
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{
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uint8_t* DataStream = (uint8_t*)(Buffer + TEMPLATE_BUFFER_OFFSET(Length));
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bool LastPacketFull = false;
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if (Length > USB_ControlRequest.wLength)
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Length = USB_ControlRequest.wLength;
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while (Length && !(Endpoint_IsOUTReceived()))
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{
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while (!(Endpoint_IsINReady()))
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{
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if (USB_DeviceState == DEVICE_STATE_Unattached)
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return ENDPOINT_RWCSTREAM_DeviceDisconnected;
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}
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while (Length && (Endpoint_BytesInEndpoint() < USB_ControlEndpointSize))
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{
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TEMPLATE_TRANSFER_BYTE(DataStream);
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Length--;
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}
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LastPacketFull = (Endpoint_BytesInEndpoint() == USB_ControlEndpointSize);
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Endpoint_ClearIN();
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}
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if (Endpoint_IsOUTReceived())
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return ENDPOINT_RWCSTREAM_HostAborted;
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if (LastPacketFull)
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{
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while (!(Endpoint_IsINReady()))
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{
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if (USB_DeviceState == DEVICE_STATE_Unattached)
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return ENDPOINT_RWCSTREAM_DeviceDisconnected;
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}
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Endpoint_ClearIN();
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}
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while (!(Endpoint_IsOUTReceived()))
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{
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if (USB_DeviceState == DEVICE_STATE_Unattached)
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return ENDPOINT_RWCSTREAM_DeviceDisconnected;
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}
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return ENDPOINT_RWCSTREAM_NoError;
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}
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#undef TEMPLATE_BUFFER_OFFSET
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#undef TEMPLATE_FUNC_NAME
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#undef TEMPLATE_TRANSFER_BYTE |