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/*
 *  spreadspace avr utils
 *
 *
 *  Copyright (C) 2013 Christian Pointner <equinox@spreadspace.org>
 *                     Othmar Gsenger <otti@wirdorange.org>
 *
 *  This file is part of spreadspace avr utils.
 *
 *  spreadspace avr utils is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  any later version.
 *
 *  spreadspace avr utils is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with spreadspace avr utils. If not, see <http://www.gnu.org/licenses/>.
 */

#include <stdio.h>

#include "anyio.h"

#include <LUFA/Drivers/USB/USB.h>
#include "lufa-descriptor-usbserial.h"
#include "LUFA/Drivers/Peripheral/Serial.h"

/*
             LUFA Library
     Copyright (C) Dean Camera, 2012.

  dean [at] fourwalledcubicle [dot] com
           www.lufa-lib.org
*/

USB_ClassInfo_CDC_Device_t VirtualSerial_CDC_Interface =
  {
    .Config =
      {
        .ControlInterfaceNumber         = 0,

        .DataINEndpointNumber           = CDC_TX_EPNUM,
        .DataINEndpointSize             = CDC_TXRX_EPSIZE,
        .DataINEndpointDoubleBank       = false,

        .DataOUTEndpointNumber          = CDC_RX_EPNUM,
        .DataOUTEndpointSize            = CDC_TXRX_EPSIZE,
        .DataOUTEndpointDoubleBank      = false,

        .NotificationEndpointNumber     = CDC_NOTIFICATION_EPNUM,
        .NotificationEndpointSize       = CDC_NOTIFICATION_EPSIZE,
        .NotificationEndpointDoubleBank = false,
      },
  };

void EVENT_USB_Device_ConfigurationChanged(void)
{
  CDC_Device_ConfigureEndpoints(&VirtualSerial_CDC_Interface);
}

void EVENT_USB_Device_ControlRequest(void)
{
  CDC_Device_ProcessControlRequest(&VirtualSerial_CDC_Interface);
}
/* end LUFA CDC-ACM specific definitions*/

FILE usb_stream;
FILE serial_stream;

void anyio_init(const uint32_t baudrate, const uint8_t doublespeed)
{
  Serial_Init(baudrate, doublespeed);
  Serial_CreateStream(&serial_stream);

  USB_Init();
  CDC_Device_CreateStream(&VirtualSerial_CDC_Interface,&usb_stream);
}

void anyio_task(void)
{
  CDC_Device_USBTask(&VirtualSerial_CDC_Interface); 
  USB_USBTask(); 
}

int16_t anyio_bytes_received(void)
{
  if(stdin == &usb_stream)
    return CDC_Device_BytesReceived(&VirtualSerial_CDC_Interface);
  else
    return (int16_t)Serial_IsCharReceived();
}

void EVENT_CDC_Device_ControLineStateChanged(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo)  
{
  if(CDCInterfaceInfo->State.ControlLineStates.HostToDevice & CDC_CONTROL_LINE_OUT_DTR)
    stdin = stdout = &usb_stream;
  else
    stdin = stdout = &serial_stream;
}

void EVENT_USB_Device_Disconnect(void)
{
  stdin = stdout = &serial_stream;
}