protocol/lufa/LUFA-git/LUFA/Drivers/Board/AVR8/EVK527/Dataflash.h

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2014.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6            www.lufa-lib.org
   7 */
   8
   9 /*
  10   Copyright 2014  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 disclaims 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 Board specific Dataflash driver header for the Atmel EVK527.
  33  *  \copydetails Group_Dataflash_EVK527
  34  *
  35  *  \note This file should not be included directly. It is automatically included as needed by the dataflash driver
  36  *        dispatch header located in LUFA/Drivers/Board/Dataflash.h.
  37  */
  38
  39 /** \ingroup Group_Dataflash
  40  *  \defgroup Group_Dataflash_EVK527 EVK527
  41  *  \brief Board specific Dataflash driver header for the Atmel EVK527.
  42  *
  43  *  Board specific Dataflash driver header for the Atmel EVK527.
  44  *
  45  *  <table>
  46  *    <tr><th>Name</th><th>Info</th><th>Select Pin</th><th>SPI Port</th></tr>
  47  *    <tr><td>DATAFLASH_CHIP1</td><td>AT45DB321C (4MB)</td><td>PORTE.6</td><td>SPI0</td></tr>
  48  *  </table>
  49  *
  50  *  @{
  51  */
  52
  53 #ifndef __DATAFLASH_EVK527_H__
  54 #define __DATAFLASH_EVK527_H__
  55
  56         /* Includes: */
  57                 #include "../../../../Common/Common.h"
  58                 #include "../../../Misc/AT45DB321C.h"
  59                 #include "../../../Peripheral/SPI.h"
  60
  61         /* Preprocessor Checks: */
  62                 #if !defined(__INCLUDE_FROM_DATAFLASH_H)
  63                         #error Do not include this file directly. Include LUFA/Drivers/Board/Dataflash.h instead.
  64                 #endif
  65
  66         /* Private Interface - For use in library only: */
  67         #if !defined(__DOXYGEN__)
  68                 /* Macros: */
  69                         #define DATAFLASH_CHIPCS_MASK                DATAFLASH_CHIP1
  70                         #define DATAFLASH_CHIPCS_DDR                 DDRE
  71                         #define DATAFLASH_CHIPCS_PORT                PORTE
  72         #endif
  73
  74         /* Public Interface - May be used in end-application: */
  75                 /* Macros: */
  76                         /** Constant indicating the total number of dataflash ICs mounted on the selected board. */
  77                         #define DATAFLASH_TOTALCHIPS                 1
  78
  79                         /** Mask for no dataflash chip selected. */
  80                         #define DATAFLASH_NO_CHIP                    0
  81
  82                         /** Mask for the first dataflash chip selected. */
  83                         #define DATAFLASH_CHIP1                      (1 << 6)
  84
  85                         /** Internal main memory page size for the board's dataflash IC. */
  86                         #define DATAFLASH_PAGE_SIZE                  512
  87
  88                         /** Total number of pages inside the board's dataflash IC. */
  89                         #define DATAFLASH_PAGES                      8192
  90
  91                 /* Inline Functions: */
  92                         /** Initializes the dataflash driver so that commands and data may be sent to an attached dataflash IC.
  93                          *  The appropriate SPI interface will be automatically configured.
  94                          */
  95                         static inline void Dataflash_Init(void)
  96                         {
  97                                 DATAFLASH_CHIPCS_DDR  |= DATAFLASH_CHIPCS_MASK;
  98                                 DATAFLASH_CHIPCS_PORT |= DATAFLASH_CHIPCS_MASK;
  99
 100                                 SPI_Init(SPI_SPEED_FCPU_DIV_2 | SPI_ORDER_MSB_FIRST | SPI_SCK_LEAD_FALLING | SPI_SAMPLE_TRAILING | SPI_MODE_MASTER);
 101                         }
 102
 103                         /** Sends a byte to the currently selected dataflash IC, and returns a byte from the dataflash.
 104                          *
 105                          *  \param[in] Byte  Byte of data to send to the dataflash
 106                          *
 107                          *  \return Last response byte from the dataflash
 108                          */
 109                         static inline uint8_t Dataflash_TransferByte(const uint8_t Byte) ATTR_ALWAYS_INLINE;
 110                         static inline uint8_t Dataflash_TransferByte(const uint8_t Byte)
 111                         {
 112                                 return SPI_TransferByte(Byte);
 113                         }
 114
 115                         /** Sends a byte to the currently selected dataflash IC, and ignores the next byte from the dataflash.
 116                          *
 117                          *  \param[in] Byte  Byte of data to send to the dataflash
 118                          */
 119                         static inline void Dataflash_SendByte(const uint8_t Byte) ATTR_ALWAYS_INLINE;
 120                         static inline void Dataflash_SendByte(const uint8_t Byte)
 121                         {
 122                                 SPI_SendByte(Byte);
 123                         }
 124
 125                         /** Sends a dummy byte to the currently selected dataflash IC, and returns the next byte from the dataflash.
 126                          *
 127                          *  \return Last response byte from the dataflash
 128                          */
 129                         static inline uint8_t Dataflash_ReceiveByte(void) ATTR_ALWAYS_INLINE ATTR_WARN_UNUSED_RESULT;
 130                         static inline uint8_t Dataflash_ReceiveByte(void)
 131                         {
 132                                 return SPI_ReceiveByte();
 133                         }
 134
 135                         /** Determines the currently selected dataflash chip.
 136                          *
 137                          *  \return Mask of the currently selected Dataflash chip, either \ref DATAFLASH_NO_CHIP if no chip is selected
 138                          *          or a DATAFLASH_CHIPn mask (where n is the chip number).
 139                          */
 140                         static inline uint8_t Dataflash_GetSelectedChip(void) ATTR_ALWAYS_INLINE ATTR_WARN_UNUSED_RESULT;
 141                         static inline uint8_t Dataflash_GetSelectedChip(void)
 142                         {
 143                                 return (~DATAFLASH_CHIPCS_PORT & DATAFLASH_CHIPCS_MASK);
 144                         }
 145
 146                         /** Selects the given dataflash chip.
 147                          *
 148                          *  \param[in]  ChipMask  Mask of the Dataflash IC to select, in the form of a \c DATAFLASH_CHIPn mask (where n is
 149                          *              the chip number).
 150                          */
 151                         static inline void Dataflash_SelectChip(const uint8_t ChipMask) ATTR_ALWAYS_INLINE;
 152                         static inline void Dataflash_SelectChip(const uint8_t ChipMask)
 153                         {
 154                                 DATAFLASH_CHIPCS_PORT = ((DATAFLASH_CHIPCS_PORT | DATAFLASH_CHIPCS_MASK) & ~ChipMask);
 155                         }
 156
 157                         /** Deselects the current dataflash chip, so that no dataflash is selected. */
 158                         static inline void Dataflash_DeselectChip(void) ATTR_ALWAYS_INLINE;
 159                         static inline void Dataflash_DeselectChip(void)
 160                         {
 161                                 Dataflash_SelectChip(DATAFLASH_NO_CHIP);
 162                         }
 163
 164                         /** Selects a dataflash IC from the given page number, which should range from 0 to
 165                          *  ((DATAFLASH_PAGES * DATAFLASH_TOTALCHIPS) - 1). For boards containing only one
 166                          *  dataflash IC, this will select DATAFLASH_CHIP1. If the given page number is outside
 167                          *  the total number of pages contained in the boards dataflash ICs, all dataflash ICs
 168                          *  are deselected.
 169                          *
 170                          *  \param[in] PageAddress  Address of the page to manipulate, ranging from
 171                          *                          0 to ((DATAFLASH_PAGES * DATAFLASH_TOTALCHIPS) - 1).
 172                          */
 173                         static inline void Dataflash_SelectChipFromPage(const uint16_t PageAddress)
 174                         {
 175                                 Dataflash_DeselectChip();
 176
 177                                 if (PageAddress >= DATAFLASH_PAGES)
 178                                   return;
 179
 180                                 Dataflash_SelectChip(DATAFLASH_CHIP1);
 181                         }
 182
 183                         /** Toggles the select line of the currently selected dataflash IC, so that it is ready to receive
 184                          *  a new command.
 185                          */
 186                         static inline void Dataflash_ToggleSelectedChipCS(void)
 187                         {
 188                                 uint8_t SelectedChipMask = Dataflash_GetSelectedChip();
 189
 190                                 Dataflash_DeselectChip();
 191                                 Dataflash_SelectChip(SelectedChipMask);
 192                         }
 193
 194                         /** Spin-loops while the currently selected dataflash is busy executing a command, such as a main
 195                          *  memory page program or main memory to buffer transfer.
 196                          */
 197                         static inline void Dataflash_WaitWhileBusy(void)
 198                         {
 199                                 Dataflash_ToggleSelectedChipCS();
 200                                 Dataflash_SendByte(DF_CMD_GETSTATUS);
 201                                 while (!(Dataflash_ReceiveByte() & DF_STATUS_READY));
 202                                 Dataflash_ToggleSelectedChipCS();
 203                         }
 204
 205                         /** Sends a set of page and buffer address bytes to the currently selected dataflash IC, for use with
 206                          *  dataflash commands which require a complete 24-bit address.
 207                          *
 208                          *  \param[in] PageAddress  Page address within the selected dataflash IC
 209                          *  \param[in] BufferByte   Address within the dataflash's buffer
 210                          */
 211                         static inline void Dataflash_SendAddressBytes(uint16_t PageAddress,
 212                                                                       const uint16_t BufferByte)
 213                         {
 214                                 Dataflash_SendByte(PageAddress >> 5);
 215                                 Dataflash_SendByte((PageAddress << 3) | (BufferByte >> 8));
 216                                 Dataflash_SendByte(BufferByte);
 217                         }
 218
 219 #endif
 220
 221 /** @} */
 222