eetoolTest3.c

// Pseudo-code. May not compile or work
for (;;)
{
	// Check for host data
	uint16_t byteCount = CDC_Device_BytesReceived(&EETool_CDC_Interface);
	byteCount = MIN(byteCount,BUFF_SIZE-1);
	
	if (byteCount>BUFF_SIZE)
	{
		FatalError();
	}
	
	if (byteCount>0)
	{
		// Read all data from host
		int i;
		for (i=0; i<byteCount; i++)
		{
			int16_t value = CDC_Device_ReceiveByte(&EETool_CDC_Interface);
			if (value>=0)
			{
				gCommBuffer[i] = (uint8_t)value;
			}
		}
		
		// Echo it back
		CDC_Device_SendData(&EETool_CDC_Interface, gCommBuffer, byteCount);
	}
		
	CDC_Device_USBTask(&EETool_CDC_Interface);
	USB_USBTask();
}