Template_Endpoint_Control_W.c 1.38 KB
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uint8_t TEMPLATE_FUNC_NAME (const void* Buffer,
                            uint16_t Length)
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{
	uint8_t* DataStream     = ((uint8_t*)Buffer + TEMPLATE_BUFFER_OFFSET(Length));
	bool     LastPacketFull = false;
	
	if (Length > USB_ControlRequest.wLength)
	  Length = USB_ControlRequest.wLength;
	else if (!(Length))
	  Endpoint_ClearIN();

	while (Length || LastPacketFull)
	{
		if (Endpoint_IsSETUPReceived())
		  return ENDPOINT_RWCSTREAM_HostAborted;

		if (Endpoint_IsOUTReceived())
		  break;
		
		if (USB_DeviceState == DEVICE_STATE_Unattached)
		  return ENDPOINT_RWCSTREAM_DeviceDisconnected;
		else if (USB_DeviceState == DEVICE_STATE_Suspended)
		  return ENDPOINT_RWCSTREAM_BusSuspended;
		  
		if (Endpoint_IsINReady())
		{
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			uint16_t BytesInEndpoint = Endpoint_BytesInEndpoint();
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			while (Length && (BytesInEndpoint < USB_ControlEndpointSize))
			{
				TEMPLATE_TRANSFER_BYTE(DataStream);
				Length--;
				BytesInEndpoint++;
			}
			
			LastPacketFull = (BytesInEndpoint == USB_ControlEndpointSize);
			Endpoint_ClearIN();
		}
	}
	
	while (!(Endpoint_IsOUTReceived()))
	{
		if (USB_DeviceState == DEVICE_STATE_Unattached)
		  return ENDPOINT_RWCSTREAM_DeviceDisconnected;
		else if (USB_DeviceState == DEVICE_STATE_Suspended)
		  return ENDPOINT_RWCSTREAM_BusSuspended;
	}

	return ENDPOINT_RWCSTREAM_NoError;
}

#undef TEMPLATE_BUFFER_OFFSET
#undef TEMPLATE_FUNC_NAME
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#undef TEMPLATE_TRANSFER_BYTE