protocol/lufa/LUFA-120730/LUFA/Drivers/Board/Dataflash.h

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2012.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6            www.lufa-lib.org
   7 */
   8
   9 /*
  10   Copyright 2012  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  *  \brief Atmel Dataflash storage IC board hardware driver.
  34  *
  35  *  This file is the master dispatch header file for the board-specific Atmel dataflash driver, for boards containing
  36  *  Atmel Dataflash ICs for external non-volatile storage.
  37  *
  38  *  User code should include this file, which will in turn include the correct dataflash driver header file for
  39  *  the currently selected board.
  40  *
  41  *  If the \c BOARD value is set to \c BOARD_USER, this will include the \c /Board/Dataflash.h file in the user project
  42  *  directory.
  43  *
  44  *  For possible \c BOARD makefile values, see \ref Group_BoardTypes.
  45  */
  46
  47 /** \ingroup Group_BoardDrivers
  48  *  \defgroup Group_Dataflash Dataflash Driver - LUFA/Drivers/Board/Dataflash.h
  49  *  \brief Atmel Dataflash storage IC board hardware driver.
  50  *
  51  *  \section Sec_Dependencies Module Source Dependencies
  52  *  The following files must be built with any user project that uses this module:
  53  *    - None
  54  *
  55  *  \section Sec_ModDescription Module Description
  56  *  Dataflash driver. This module provides an easy to use interface for the Dataflash ICs located on many boards,
  57  *  for the storage of large amounts of data into the Dataflash's non-volatile memory.
  58  *
  59  *  If the \c BOARD value is set to \c BOARD_USER, this will include the \c /Board/Dataflash.h file in the user project
  60  *  directory. Otherwise, it will include the appropriate built in board driver header file.
  61  *
  62  *  For possible \c BOARD makefile values, see \ref Group_BoardTypes.
  63  *
  64  *  \section Sec_ExampleUsage Example Usage
  65  *  The following snippet is an example of how this module may be used within a typical
  66  *  application.
  67  *
  68  *  \code
  69  *      // Initialize the SPI and board Dataflash drivers before first use
  70  *      SPI_Init(SPI_SPEED_FCPU_DIV_2 | SPI_ORDER_MSB_FIRST | SPI_SCK_LEAD_FALLING |
  71  *               SPI_SAMPLE_TRAILING | SPI_MODE_MASTER);
  72  *      Dataflash_Init();
  73  *
  74  *      uint8_t WriteBuffer[DATAFLASH_PAGE_SIZE];
  75  *      uint8_t ReadBuffer[DATAFLASH_PAGE_SIZE];
  76  *
  77  *      // Fill page write buffer with a repeating pattern
  78  *      for (uint16_t i = 0; i < DATAFLASH_PAGE_SIZE; i++)
  79  *        WriteBuffer[i] = (i & 0xFF);
  80  *
  81  *      // Must select the chip of interest first before operating on it
  82  *      Dataflash_SelectChip(DATAFLASH_CHIP1);
  83  *
  84  *      // Write to the Dataflash's first internal memory buffer
  85  *      printf("Writing data to first dataflash buffer:\r\n");
  86  *      Dataflash_SendByte(DF_CMD_BUFF1WRITE);
  87  *      Dataflash_SendAddressBytes(0, 0);
  88  *
  89  *      for (uint16_t i = 0; i < DATAFLASH_PAGE_SIZE; i++)
  90  *        Dataflash_SendByte(WriteBuffer[i]);
  91  *
  92  *      // Commit the Dataflash's first memory buffer to the non-volatile FLASH memory
  93  *      printf("Committing page to non-volatile memory page index 5:\r\n");
  94  *      Dataflash_SendByte(DF_CMD_BUFF1TOMAINMEMWITHERASE);
  95  *      Dataflash_SendAddressBytes(5, 0);
  96  *      Dataflash_WaitWhileBusy();
  97  *
  98  *      // Read the page from non-volatile FLASH memory into the Dataflash's second memory buffer
  99  *      printf("Reading data into second dataflash buffer:\r\n");
 100  *      Dataflash_SendByte(DF_CMD_MAINMEMTOBUFF2);
 101  *      Dataflash_SendAddressBytes(5, 0);
 102  *      Dataflash_WaitWhileBusy();
 103  *
 104  *      // Read the Dataflash's second internal memory buffer
 105  *      Dataflash_SendByte(DF_CMD_BUFF2READ);
 106  *      Dataflash_SendAddressBytes(0, 0);
 107  *
 108  *      for (uint16_t i = 0; i < DATAFLASH_PAGE_SIZE; i++)
 109  *        ReadBuffer[i] = Dataflash_ReceiveByte();
 110  *
 111  *      // Deselect the chip after use
 112  *      Dataflash_DeselectChip();
 113  *  \endcode
 114  *
 115  *  @{
 116  */
 117
 118 #ifndef __DATAFLASH_H__
 119 #define __DATAFLASH_H__
 120
 121         /* Macros: */
 122                 #define __INCLUDE_FROM_DATAFLASH_H
 123
 124         /* Includes: */
 125                 #include "../../Common/Common.h"
 126
 127         /* Enable C linkage for C++ Compilers: */
 128                 #if defined(__cplusplus)
 129                         extern "C" {
 130                 #endif
 131
 132         /* Public Interface - May be used in end-application: */
 133                 /* Macros: */
 134                         #if !defined(__DOXYGEN__)
 135                                 #define __GET_DATAFLASH_MASK2(x, y) x ## y
 136                                 #define __GET_DATAFLASH_MASK(x)     __GET_DATAFLASH_MASK2(DATAFLASH_CHIP,x)
 137                         #endif
 138
 139                         /** Retrieves the Dataflash chip select mask for the given Dataflash chip index.
 140                          *
 141                          *  \param[in] index  Index of the dataflash chip mask to retrieve
 142                          *
 143                          *  \return Mask for the given Dataflash chip's /CS pin
 144                          */
 145                         #define DATAFLASH_CHIP_MASK(index)      __GET_DATAFLASH_MASK(index)
 146
 147                 /* Inline Functions: */
 148                         /** Initializes the dataflash driver so that commands and data may be sent to an attached dataflash IC.
 149                          *
 150                          *  \note The microcontroller's physical interface driver connected to the Dataflash IC must be initialized before
 151                          *        any of the dataflash commands are used. This is usually a SPI hardware port, but on some devices/boards may
 152                          *        be a USART operating in SPI Master mode.
 153                          */
 154                         static inline void Dataflash_Init(void);
 155
 156                         /** Determines the currently selected dataflash chip.
 157                          *
 158                          *  \return Mask of the currently selected Dataflash chip, either \ref DATAFLASH_NO_CHIP if no chip is selected
 159                          *  or a \c DATAFLASH_CHIPn mask (where n is the chip number).
 160                          */
 161                         static inline uint8_t Dataflash_GetSelectedChip(void) ATTR_ALWAYS_INLINE ATTR_WARN_UNUSED_RESULT;
 162
 163                         /** Selects the given dataflash chip.
 164                          *
 165                          *  \param[in]  ChipMask  Mask of the Dataflash IC to select, in the form of \c DATAFLASH_CHIPn mask (where n is
 166                          *              the chip number).
 167                          */
 168                         static inline void Dataflash_SelectChip(const uint8_t ChipMask) ATTR_ALWAYS_INLINE;
 169
 170                         /** Deselects the current dataflash chip, so that no dataflash is selected. */
 171                         static inline void Dataflash_DeselectChip(void) ATTR_ALWAYS_INLINE;
 172
 173                         /** Selects a dataflash IC from the given page number, which should range from 0 to
 174                          *  ((DATAFLASH_PAGES * DATAFLASH_TOTALCHIPS) - 1). For boards containing only one
 175                          *  dataflash IC, this will select \ref DATAFLASH_CHIP1. If the given page number is outside
 176                          *  the total number of pages contained in the boards dataflash ICs, all dataflash ICs
 177                          *  are deselected.
 178                          *
 179                          *  \param[in] PageAddress  Address of the page to manipulate, ranging from
 180                          *                          0 to ((DATAFLASH_PAGES * DATAFLASH_TOTALCHIPS) - 1).
 181                          */
 182                         static inline void Dataflash_SelectChipFromPage(const uint16_t PageAddress);
 183
 184                         /** Toggles the select line of the currently selected dataflash IC, so that it is ready to receive
 185                          *  a new command.
 186                          */
 187                         static inline void Dataflash_ToggleSelectedChipCS(void);
 188
 189                         /** Spin-loops while the currently selected dataflash is busy executing a command, such as a main
 190                          *  memory page program or main memory to buffer transfer.
 191                          */
 192                         static inline void Dataflash_WaitWhileBusy(void);
 193
 194                         /** Sends a set of page and buffer address bytes to the currently selected dataflash IC, for use with
 195                          *  dataflash commands which require a complete 24-bit address.
 196                          *
 197                          *  \param[in] PageAddress  Page address within the selected dataflash IC
 198                          *  \param[in] BufferByte   Address within the dataflash's buffer
 199                          */
 200                         static inline void Dataflash_SendAddressBytes(uint16_t PageAddress,
 201                                                                       const uint16_t BufferByte);
 202
 203                         /** Sends a byte to the currently selected dataflash IC, and returns a byte from the dataflash.
 204                          *
 205                          *  \param[in] Byte  Byte of data to send to the dataflash
 206                          *
 207                          *  \return Last response byte from the dataflash
 208                          */
 209                         static inline uint8_t Dataflash_TransferByte(const uint8_t Byte) ATTR_ALWAYS_INLINE;
 210
 211                         /** Sends a byte to the currently selected dataflash IC, and ignores the next byte from the dataflash.
 212                          *
 213                          *  \param[in] Byte  Byte of data to send to the dataflash
 214                          */
 215                         static inline void Dataflash_SendByte(const uint8_t Byte) ATTR_ALWAYS_INLINE;
 216
 217                         /** Sends a dummy byte to the currently selected dataflash IC, and returns the next byte from the dataflash.
 218                          *
 219                          *  \return Last response byte from the dataflash
 220                          */
 221                         static inline uint8_t Dataflash_ReceiveByte(void) ATTR_ALWAYS_INLINE ATTR_WARN_UNUSED_RESULT;
 222
 223                 /* Includes: */
 224                         #if (BOARD == BOARD_NONE)
 225                                 #error The Board Dataflash driver cannot be used if the makefile BOARD option is not set.
 226                         #elif (BOARD == BOARD_USBKEY)
 227                                 #include "AVR8/USBKEY/Dataflash.h"
 228                         #elif (BOARD == BOARD_STK525)
 229                                 #include "AVR8/STK525/Dataflash.h"
 230                         #elif (BOARD == BOARD_STK526)
 231                                 #include "AVR8/STK526/Dataflash.h"
 232                         #elif ((BOARD == BOARD_XPLAIN) || (BOARD == BOARD_XPLAIN_REV1))
 233                                 #include "AVR8/XPLAIN/Dataflash.h"
 234                         #elif (BOARD == BOARD_EVK527)
 235                                 #include "AVR8/EVK527/Dataflash.h"
 236                         #elif (BOARD == BOARD_A3BU_XPLAINED)
 237                                 #include "XMEGA/A3BU_XPLAINED/Dataflash.h"
 238                         #elif (BOARD == BOARD_B1_XPLAINED)
 239                                 #include "XMEGA/B1_XPLAINED/Dataflash.h"
 240                         #else
 241                                 #include "Board/Dataflash.h"
 242                         #endif
 243
 244         /* Disable C linkage for C++ Compilers: */
 245                 #if defined(__cplusplus)
 246                         }
 247                 #endif
 248
 249 #endif
 250
 251 /** @} */
 252