/*
             LUFA Library
     Copyright (C) Dean Camera, 2010.

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

/*
  Copyright 2010  Dean Camera (dean [at] fourwalledcubicle [dot] com)

  Permission to use, copy, modify, distribute, and sell this
  software and its documentation for any purpose is hereby granted
  without fee, provided that the above copyright notice appear in
  all copies and that both that the copyright notice and this
  permission notice and warranty disclaimer appear in supporting
  documentation, and that the name of the author not be used in
  advertising or publicity pertaining to distribution of the
  software without specific, written prior permission.

  The author disclaim all warranties with regard to this
  software, including all implied warranties of merchantability
  and fitness.  In no event shall the author be liable for any
  special, indirect or consequential damages or any damages
  whatsoever resulting from loss of use, data or profits, whether
  in an action of contract, negligence or other tortious action,
  arising out of or in connection with the use or performance of
  this software.
*/

/** \file
 *
 *  Header file for BootloaderCDC.c.
 */

#ifndef _CDC_H_
#define _CDC_H_

	/* Includes: */
		#include <avr/io.h>
		#include <avr/wdt.h>
		#include <avr/boot.h>
		#include <avr/eeprom.h>
		#include <avr/power.h>
		#include <avr/interrupt.h>
		#include <stdbool.h>

		#include "Descriptors.h"

		#include <LUFA/Drivers/USB/USB.h>

	/* Macros: */
		/** Version major of the CDC bootloader. */
		#define BOOTLOADER_VERSION_MAJOR     0x01

		/** Version minor of the CDC bootloader. */
		#define BOOTLOADER_VERSION_MINOR     0x00

		/** Hardware version major of the CDC bootloader. */
		#define BOOTLOADER_HWVERSION_MAJOR   0x01

		/** Hardware version minor of the CDC bootloader. */
		#define BOOTLOADER_HWVERSION_MINOR   0x00

		/** Eight character bootloader firmware identifier reported to the host when requested */
		#define SOFTWARE_IDENTIFIER          "LUFACDC"

		/** CDC Class specific request to get the current virtual serial port configuration settings. */
		#define REQ_GetLineEncoding          0x21

		/** CDC Class specific request to set the current virtual serial port configuration settings. */
		#define REQ_SetLineEncoding          0x20

	/* Type Defines: */
		/** Type define for the virtual serial port line encoding settings, for storing the current USART configuration
		 *  as set by the host via a class specific request.
		 */
		typedef struct
		{
			uint32_t BaudRateBPS; /**< Baud rate of the virtual serial port, in bits per second */
			uint8_t  CharFormat; /**< Character format of the virtual serial port, a value from the
			                      *   CDCDevice_CDC_LineCodingFormats_t enum
			                      */
			uint8_t  ParityType; /**< Parity setting of the virtual serial port, a value from the
			                      *   CDCDevice_LineCodingParity_t enum
			                      */
			uint8_t  DataBits; /**< Bits of data per character of the virtual serial port */
		} CDC_Line_Coding_t;

		/** Type define for a non-returning pointer to the start of the loaded application in flash memory. */
		typedef void (*AppPtr_t)(void) ATTR_NO_RETURN;

	/* Enums: */
		/** Enum for the possible line encoding formats of a virtual serial port. */
		enum CDCDevice_CDC_LineCodingFormats_t
		{
			OneStopBit          = 0, /**< Each frame contains one stop bit */
			OneAndAHalfStopBits = 1, /**< Each frame contains one and a half stop bits */
			TwoStopBits         = 2, /**< Each frame contains two stop bits */
		};

		/** Enum for the possible line encoding parity settings of a virtual serial port. */
		enum CDCDevice_LineCodingParity_t
		{
			Parity_None         = 0, /**< No parity bit mode on each frame */
			Parity_Odd          = 1, /**< Odd parity bit mode on each frame */
			Parity_Even         = 2, /**< Even parity bit mode on each frame */
			Parity_Mark         = 3, /**< Mark parity bit mode on each frame */
			Parity_Space        = 4, /**< Space parity bit mode on each frame */
		};

	/* Function Prototypes: */
		void CDC_Task(void);
		void SetupHardware(void);

		void EVENT_USB_Device_ConfigurationChanged(void);

		#if defined(INCLUDE_FROM_BOOTLOADERCDC_C) || defined(__DOXYGEN__)
			#if !defined(NO_BLOCK_SUPPORT)
			static void    ReadWriteMemoryBlock(const uint8_t Command);
			#endif
			static uint8_t FetchNextCommandByte(void);
			static void    WriteNextResponseByte(const uint8_t Response);
		#endif

#endif