LUFA/Drivers/Board/Dataflash.h

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2010.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6       www.fourwalledcubicle.com
   7 */
   8
   9 /*
  10   Copyright 2010  Dean Camera (dean [at] fourwalledcubicle [dot] com)
  11
  12   Permission to use, copy, modify, distribute, and sell this
  13   software and its documentation for any purpose is hereby granted
  14   without fee, provided that the above copyright notice appear in
  15   all copies and that both that the copyright notice and this
  16   permission notice and warranty disclaimer appear in supporting
  17   documentation, and that the name of the author not be used in
  18   advertising or publicity pertaining to distribution of the
  19   software without specific, written prior permission.
  20
  21   The author disclaim all warranties with regard to this
  22   software, including all implied warranties of merchantability
  23   and fitness.  In no event shall the author be liable for any
  24   special, indirect or consequential damages or any damages
  25   whatsoever resulting from loss of use, data or profits, whether
  26   in an action of contract, negligence or other tortious action,
  27   arising out of or in connection with the use or performance of
  28   this software.
  29 */
  30
  31 /** \file
  32  *  \brief Master include file for the board dataflash IC driver.
  33  *
  34  *  This file is the master dispatch header file for the board-specific dataflash driver, for boards containing
  35  *  dataflash ICs for external non-volatile storage.
  36  *
  37  *  User code should include this file, which will in turn include the correct dataflash driver header file for
  38  *  the currently selected board.
  39  *
  40  *  If the BOARD value is set to BOARD_USER, this will include the /Board/Dataflash.h file in the user project
  41  *  directory.
  42  */
  43
  44 /** \ingroup Group_BoardDrivers
  45  *  @defgroup Group_Dataflash Dataflash Driver - LUFA/Drivers/Board/Dataflash.h
  46  *
  47  *  \section Sec_Dependencies Module Source Dependencies
  48  *  The following files must be built with any user project that uses this module:
  49  *    - None
  50  *
  51  *  \section Module Description
  52  *  Dataflash driver. This module provides an easy to use interface for the Dataflash ICs located on many boards,
  53  *  for the storage of large amounts of data into the Dataflash's non-volatile memory.
  54  *
  55  *  If the BOARD value is set to BOARD_USER, this will include the /Board/Dataflash.h file in the user project
  56  *  directory. Otherwise, it will include the appropriate built in board driver header file.
  57  *
  58  *  @{
  59  */
  60
  61 #ifndef __DATAFLASH_H__
  62 #define __DATAFLASH_H__
  63
  64         /* Macros: */
  65         #if !defined(__DOXYGEN__)
  66                 #define __INCLUDE_FROM_DATAFLASH_H
  67                 #define INCLUDE_FROM_DATAFLASH_H
  68         #endif
  69
  70         /* Includes: */
  71         #include "../Peripheral/SPI.h"
  72         #include "../../Common/Common.h"
  73
  74         /* Enable C linkage for C++ Compilers: */
  75                 #if defined(__cplusplus)
  76                         extern "C" {
  77                 #endif
  78
  79         /* Public Interface - May be used in end-application: */
  80                 /* Macros: */
  81                         #if !defined(__DOXYGEN__)
  82                                 #define __GET_DATAFLASH_MASK2(x, y) x ## y
  83                                 #define __GET_DATAFLASH_MASK(x)     __GET_DATAFLASH_MASK2(DATAFLASH_CHIP,x)
  84                         #endif
  85
  86                         /** Retrieves the Dataflash chip select mask for the given Dataflash chip index.
  87                          *
  88                          *  \param[in] index  Index of the dataflash chip mask to retrieve
  89                          *
  90                          *  \return Mask for the given Dataflash chip's /CS pin
  91                          */
  92                         #define DATAFLASH_CHIP_MASK(index)      __GET_DATAFLASH_MASK(index)
  93
  94                 /* Pseudo-Function Macros: */
  95                         #if defined(__DOXYGEN__)
  96                                 /** Determines the currently selected dataflash chip.
  97                                  *
  98                                  *  \return Mask of the currently selected Dataflash chip, either \ref DATAFLASH_NO_CHIP if no chip is selected
  99                                  *  or a DATAFLASH_CHIPn mask (where n is the chip number).
 100                                  */
 101                                 static inline uint8_t Dataflash_GetSelectedChip(void);
 102
 103                                 /** Selects the given dataflash chip.
 104                                  *
 105                                  *  \param[in]  ChipMask  Mask of the Dataflash IC to select, in the form of DATAFLASH_CHIPn mask (where n is
 106                                  *              the chip number).
 107                                  */
 108                                 static inline void Dataflash_SelectChip(uint8_t ChipMask);
 109
 110                                 /** Deselects the current dataflash chip, so that no dataflash is selected. */
 111                                 static inline void Dataflash_DeselectChip(void);
 112                         #else
 113                                 #define Dataflash_GetSelectedChip()          (DATAFLASH_CHIPCS_PORT & DATAFLASH_CHIPCS_MASK)
 114
 115                                 #define Dataflash_SelectChip(mask)   MACROS{ DATAFLASH_CHIPCS_PORT = ((DATAFLASH_CHIPCS_PORT \
 116                                                                                                                          & ~DATAFLASH_CHIPCS_MASK) | (mask));            }MACROE
 117
 118                                 #define Dataflash_DeselectChip()             Dataflash_SelectChip(DATAFLASH_NO_CHIP)
 119                         #endif
 120
 121                 /* Inline Functions: */
 122                         /** Sends a byte to the currently selected dataflash IC, and returns a byte from the dataflash.
 123                          *
 124                          *  \param[in] Byte of data to send to the dataflash
 125                          *
 126                          *  \return Last response byte from the dataflash
 127                          */
 128                         static inline uint8_t Dataflash_TransferByte(const uint8_t Byte) ATTR_ALWAYS_INLINE;
 129                         static inline uint8_t Dataflash_TransferByte(const uint8_t Byte)
 130                         {
 131                                 return SPI_TransferByte(Byte);
 132                         }
 133
 134                         /** Sends a byte to the currently selected dataflash IC, and ignores the next byte from the dataflash.
 135                          *
 136                          *  \param[in] Byte of data to send to the dataflash
 137                          */
 138                         static inline void Dataflash_SendByte(const uint8_t Byte) ATTR_ALWAYS_INLINE;
 139                         static inline void Dataflash_SendByte(const uint8_t Byte)
 140                         {
 141                                 SPI_SendByte(Byte);
 142                         }
 143
 144                         /** Sends a dummy byte to the currently selected dataflash IC, and returns the next byte from the dataflash.
 145                          *
 146                          *  \return Last response byte from the dataflash
 147                          */
 148                         static inline uint8_t Dataflash_ReceiveByte(void) ATTR_ALWAYS_INLINE ATTR_WARN_UNUSED_RESULT;
 149                         static inline uint8_t Dataflash_ReceiveByte(void)
 150                         {
 151                                 return SPI_ReceiveByte();
 152                         }
 153
 154                 /* Includes: */
 155                         #if (BOARD == BOARD_NONE)
 156                                 #error The Board Buttons driver cannot be used if the makefile BOARD option is not set.
 157                         #elif (BOARD == BOARD_USBKEY)
 158                                 #include "USBKEY/Dataflash.h"
 159                         #elif (BOARD == BOARD_STK525)
 160                                 #include "STK525/Dataflash.h"
 161                         #elif (BOARD == BOARD_STK526)
 162                                 #include "STK526/Dataflash.h"
 163                         #elif (BOARD == BOARD_XPLAIN)
 164                                 #include "XPLAIN/Dataflash.h"
 165                         #elif (BOARD == BOARD_XPLAIN_REV1)
 166                                 #include "XPLAIN/Dataflash.h"
 167                         #elif (BOARD == BOARD_EVK527)
 168                                 #include "EVK527/Dataflash.h"
 169                         #elif (BOARD == BOARD_USER)
 170                                 #include "Board/Dataflash.h"
 171                         #else
 172                                 #error The selected board does not contain a dataflash IC.
 173                         #endif
 174
 175                 /* Inline Functions: */
 176                         /** Initializes the dataflash driver so that commands and data may be sent to an attached dataflash IC.
 177                          *  The AVR's SPI driver MUST be initialized before any of the dataflash commands are used.
 178                          */
 179                         static inline void Dataflash_Init(void)
 180                         {
 181                                 DATAFLASH_CHIPCS_DDR  |= DATAFLASH_CHIPCS_MASK;
 182                                 DATAFLASH_CHIPCS_PORT |= DATAFLASH_CHIPCS_MASK;
 183                         }
 184
 185                         /** Toggles the select line of the currently selected dataflash IC, so that it is ready to receive
 186                          *  a new command.
 187                          */
 188                         static inline void Dataflash_ToggleSelectedChipCS(void)
 189                         {
 190                                 uint8_t SelectedChipMask = Dataflash_GetSelectedChip();
 191
 192                                 Dataflash_DeselectChip();
 193                                 Dataflash_SelectChip(SelectedChipMask);
 194                         }
 195
 196                         /** Spin-loops while the currently selected dataflash is busy executing a command, such as a main
 197                          *  memory page program or main memory to buffer transfer.
 198                          */
 199                         static inline void Dataflash_WaitWhileBusy(void)
 200                         {
 201                                 Dataflash_ToggleSelectedChipCS();
 202                                 Dataflash_SendByte(DF_CMD_GETSTATUS);
 203                                 while (!(Dataflash_ReceiveByte() & DF_STATUS_READY));
 204                                 Dataflash_ToggleSelectedChipCS();
 205                         }
 206
 207                         /** Selects a dataflash IC from the given page number, which should range from 0 to
 208                          *  ((DATAFLASH_PAGES * DATAFLASH_TOTALCHIPS) - 1). For boards containing only one
 209                          *  dataflash IC, this will select DATAFLASH_CHIP1. If the given page number is outside
 210                          *  the total number of pages contained in the boards dataflash ICs, all dataflash ICs
 211                          *  are deselected.
 212                          *
 213                          *  \param[in] PageAddress  Address of the page to manipulate, ranging from
 214                          *                          ((DATAFLASH_PAGES * DATAFLASH_TOTALCHIPS) - 1).
 215                          */
 216                         static inline void Dataflash_SelectChipFromPage(const uint16_t PageAddress);
 217
 218                         /** Sends a set of page and buffer address bytes to the currently selected dataflash IC, for use with
 219                          *  dataflash commands which require a complete 24-byte address.
 220                          *
 221                          *  \param[in] PageAddress  Page address within the selected dataflash IC.
 222                          *  \param[in] BufferByte   Address within the dataflash's buffer.
 223                          */
 224                         static inline void Dataflash_SendAddressBytes(uint16_t PageAddress, const uint16_t BufferByte);
 225
 226         /* Disable C linkage for C++ Compilers: */
 227                 #if defined(__cplusplus)
 228                         }
 229                 #endif
 230
 231 #endif
 232
 233 /** @} */