Merge commit '60b30c036397cb5627fa374bb930794b225daa29' as 'lib/lufa'

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diff --git a/lib/lufa/LUFA/Drivers/Board/XMEGA/B1_XPLAINED/Dataflash.h b/lib/lufa/LUFA/Drivers/Board/XMEGA/B1_XPLAINED/Dataflash.h
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+/*
+             LUFA Library
+     Copyright (C) Dean Camera, 2017.
+
+  dean [at] fourwalledcubicle [dot] com
+           www.lufa-lib.org
+*/
+
+/*
+  Copyright 2017  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 disclaims 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
+ *  \brief Board specific Dataflash driver header for the Atmel XMEGA B1 Xplained.
+ *  \copydetails Group_Dataflash_B1_XPLAINED
+ *
+ *  \note This file should not be included directly. It is automatically included as needed by the dataflash driver
+ *        dispatch header located in LUFA/Drivers/Board/Dataflash.h.
+ */
+
+/** \ingroup Group_Dataflash
+ *  \defgroup Group_Dataflash_B1_XPLAINED B1_XPLAINED
+ *  \brief Board specific Dataflash driver header for the Atmel XMEGA B1 Xplained.
+ *
+ *  Board specific Dataflash driver header for the Atmel XMEGA B1 Xplained board.
+ *
+ *  <table>
+ *    <tr><th>Name</th><th>Info</th><th>Select Pin</th><th>SPI Port</th></tr>
+ *    <tr><td>DATAFLASH_CHIP1</td><td>AT45DB642D (8MB)</td><td>PORTD.2</td><td>USARTC0 (In SPI Mode, Remapped)</td></tr>
+ *  </table>
+ *
+ *  @{
+ */
+
+#ifndef __DATAFLASH_B1_XPLAINED_H__
+#define __DATAFLASH_B1_XPLAINED_H__
+
+	/* Includes: */
+		#include "../../../../Common/Common.h"
+		#include "../../../Misc/AT45DB642D.h"
+		#include "../../../Peripheral/SerialSPI.h"
+
+	/* Preprocessor Checks: */
+		#if !defined(__INCLUDE_FROM_DATAFLASH_H)
+			#error Do not include this file directly. Include LUFA/Drivers/Board/Dataflash.h instead.
+		#endif
+
+	/* Private Interface - For use in library only: */
+	#if !defined(__DOXYGEN__)
+		/* Macros: */
+			#define DATAFLASH_CHIPCS_MASK                DATAFLASH_CHIP1
+			#define DATAFLASH_CHIPCS_PORT                PORTD
+	#endif
+
+	/* Public Interface - May be used in end-application: */
+		/* Macros: */
+			/** Constant indicating the total number of dataflash ICs mounted on the selected board. */
+			#define DATAFLASH_TOTALCHIPS                 1
+
+			/** Mask for no dataflash chip selected. */
+			#define DATAFLASH_NO_CHIP                    0
+
+			/** Mask for the first dataflash chip selected. */
+			#define DATAFLASH_CHIP1                      (1 << 2)
+
+			/** Internal main memory page size for the board's dataflash ICs. */
+			#define DATAFLASH_PAGE_SIZE                  1024
+
+			/** Total number of pages inside each of the board's dataflash ICs. */
+			#define DATAFLASH_PAGES                      8192
+
+		/* Inline Functions: */
+			/** Initializes the dataflash driver so that commands and data may be sent to an attached dataflash IC.
+			 *  The appropriate SPI interface will be automatically configured.
+			 */
+			static inline void Dataflash_Init(void)
+			{
+				DATAFLASH_CHIPCS_PORT.DIRSET   = DATAFLASH_CHIPCS_MASK;
+
+				PORTCFG.MPCMASK                = DATAFLASH_CHIPCS_MASK;
+				DATAFLASH_CHIPCS_PORT.PIN0CTRL = PORT_INVEN_bm;
+
+				SerialSPI_Init(&USARTC0, (USART_SPI_SCK_LEAD_RISING | USART_SPI_SAMPLE_LEADING | USART_SPI_ORDER_MSB_FIRST), (F_CPU / 2));
+
+				PORTC.REMAP   |= PORT_USART0_bm;
+				PORTC.DIRSET   = PIN7_bm | PIN5_bm;
+				PORTC.DIRCLR   = PIN6_bm;
+				PORTC.PIN6CTRL = PORT_OPC_PULLUP_gc;
+			}
+
+			/** Sends a byte to the currently selected dataflash IC, and returns a byte from the dataflash.
+			 *
+			 *  \param[in] Byte  Byte of data to send to the dataflash
+			 *
+			 *  \return Last response byte from the dataflash
+			 */
+			static inline uint8_t Dataflash_TransferByte(const uint8_t Byte) ATTR_ALWAYS_INLINE;
+			static inline uint8_t Dataflash_TransferByte(const uint8_t Byte)
+			{
+				return SerialSPI_TransferByte(&USARTC0, Byte);
+			}
+
+			/** Sends a byte to the currently selected dataflash IC, and ignores the next byte from the dataflash.
+			 *
+			 *  \param[in] Byte  Byte of data to send to the dataflash
+			 */
+			static inline void Dataflash_SendByte(const uint8_t Byte) ATTR_ALWAYS_INLINE;
+			static inline void Dataflash_SendByte(const uint8_t Byte)
+			{
+				SerialSPI_SendByte(&USARTC0, Byte);
+			}
+
+			/** Sends a dummy byte to the currently selected dataflash IC, and returns the next byte from the dataflash.
+			 *
+			 *  \return Last response byte from the dataflash
+			 */
+			static inline uint8_t Dataflash_ReceiveByte(void) ATTR_ALWAYS_INLINE ATTR_WARN_UNUSED_RESULT;
+			static inline uint8_t Dataflash_ReceiveByte(void)
+			{
+				return SerialSPI_ReceiveByte(&USARTC0);
+			}
+
+			/** Determines the currently selected dataflash chip.
+			 *
+			 *  \return Mask of the currently selected Dataflash chip, either \ref DATAFLASH_NO_CHIP if no chip is selected
+			 *          or a DATAFLASH_CHIPn mask (where n is the chip number).
+			 */
+			static inline uint8_t Dataflash_GetSelectedChip(void) ATTR_ALWAYS_INLINE ATTR_WARN_UNUSED_RESULT;
+			static inline uint8_t Dataflash_GetSelectedChip(void)
+			{
+				return (DATAFLASH_CHIPCS_PORT.OUT & DATAFLASH_CHIPCS_MASK);
+			}
+
+			/** Selects the given dataflash chip.
+			 *
+			 *  \param[in]  ChipMask  Mask of the Dataflash IC to select, in the form of a \c DATAFLASH_CHIPn mask (where n is
+			 *              the chip number).
+			 */
+			static inline void Dataflash_SelectChip(const uint8_t ChipMask) ATTR_ALWAYS_INLINE;
+			static inline void Dataflash_SelectChip(const uint8_t ChipMask)
+			{
+				DATAFLASH_CHIPCS_PORT.OUTCLR = DATAFLASH_CHIPCS_MASK;
+				DATAFLASH_CHIPCS_PORT.OUTSET = (ChipMask & DATAFLASH_CHIPCS_MASK);
+			}
+
+			/** Deselects the current dataflash chip, so that no dataflash is selected. */
+			static inline void Dataflash_DeselectChip(void) ATTR_ALWAYS_INLINE;
+			static inline void Dataflash_DeselectChip(void)
+			{
+				Dataflash_SelectChip(DATAFLASH_NO_CHIP);
+			}
+
+			/** Selects a dataflash IC from the given page number, which should range from 0 to
+			 *  ((DATAFLASH_PAGES * DATAFLASH_TOTALCHIPS) - 1). For boards containing only one
+			 *  dataflash IC, this will select DATAFLASH_CHIP1. If the given page number is outside
+			 *  the total number of pages contained in the boards dataflash ICs, all dataflash ICs
+			 *  are deselected.
+			 *
+			 *  \param[in] PageAddress  Address of the page to manipulate, ranging from
+			 *                          0 to ((DATAFLASH_PAGES * DATAFLASH_TOTALCHIPS) - 1).
+			 */
+			static inline void Dataflash_SelectChipFromPage(const uint16_t PageAddress)
+			{
+				Dataflash_DeselectChip();
+
+				if (PageAddress >= (DATAFLASH_PAGES * DATAFLASH_TOTALCHIPS))
+				  return;
+
+				Dataflash_SelectChip(DATAFLASH_CHIP1);
+			}
+
+			/** Toggles the select line of the currently selected dataflash IC, so that it is ready to receive
+			 *  a new command.
+			 */
+			static inline void Dataflash_ToggleSelectedChipCS(void)
+			{
+				uint8_t SelectedChipMask = Dataflash_GetSelectedChip();
+
+				Dataflash_DeselectChip();
+				Dataflash_SelectChip(SelectedChipMask);
+			}
+
+			/** Spin-loops while the currently selected dataflash is busy executing a command, such as a main
+			 *  memory page program or main memory to buffer transfer.
+			 */
+			static inline void Dataflash_WaitWhileBusy(void)
+			{
+				Dataflash_ToggleSelectedChipCS();
+				Dataflash_SendByte(DF_CMD_GETSTATUS);
+				while (!(Dataflash_ReceiveByte() & DF_STATUS_READY));
+				Dataflash_ToggleSelectedChipCS();
+			}
+
+			/** Sends a set of page and buffer address bytes to the currently selected dataflash IC, for use with
+			 *  dataflash commands which require a complete 24-bit address.
+			 *
+			 *  \param[in] PageAddress  Page address within the selected dataflash IC
+			 *  \param[in] BufferByte   Address within the dataflash's buffer
+			 */
+			static inline void Dataflash_SendAddressBytes(uint16_t PageAddress,
+			                                              const uint16_t BufferByte)
+			{
+				Dataflash_SendByte(PageAddress >> 5);
+				Dataflash_SendByte((PageAddress << 3) | (BufferByte >> 8));
+				Dataflash_SendByte(BufferByte);
+			}
+
+#endif
+
+/** @} */
+