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Diffstat (limited to 'lib/lufa/LUFA/CodeTemplates/DriverStubs/Dataflash.h')
| -rw-r--r-- | lib/lufa/LUFA/CodeTemplates/DriverStubs/Dataflash.h | 223 |
1 files changed, 223 insertions, 0 deletions
diff --git a/lib/lufa/LUFA/CodeTemplates/DriverStubs/Dataflash.h b/lib/lufa/LUFA/CodeTemplates/DriverStubs/Dataflash.h new file mode 100644 index 0000000000..f405a80d52 --- /dev/null +++ b/lib/lufa/LUFA/CodeTemplates/DriverStubs/Dataflash.h @@ -0,0 +1,223 @@ +/* + 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 LUFA Custom Board Dataflash Hardware Driver (Template) + * + * This is a stub driver header file, for implementing custom board + * layout hardware with compatible LUFA board specific drivers. If + * the library is configured to use the BOARD_USER board mode, this + * driver file should be completed and copied into the "/Board/" folder + * inside the application's folder. + * + * This stub is for the board-specific component of the LUFA Dataflash + * driver. +*/ + +#ifndef __DATAFLASH_USER_H__ +#define __DATAFLASH_USER_H__ + + /* Includes: */ + // TODO: Add any required includes here + + /* 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 // TODO: Replace this with a mask of all the /CS pins of all Dataflashes + #define DATAFLASH_CHIPCS_DDR // TODO: Replace with the DDR register name for the board's Dataflash ICs + #define DATAFLASH_CHIPCS_PORT // TODO: Replace with the PORT register name for the board's Dataflash ICs + #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 // TODO: Replace with the number of Dataflashes on the board, max 2 + + /** Mask for no dataflash chip selected. */ + #define DATAFLASH_NO_CHIP 0 + + /** Mask for the first dataflash chip selected. */ + #define DATAFLASH_CHIP1 // TODO: Replace with mask with the pin attached to the first Dataflash /CS set + + /** Mask for the second dataflash chip selected. */ + #define DATAFLASH_CHIP2 // TODO: Replace with mask with the pin attached to the second Dataflash /CS set + + /** Internal main memory page size for the board's dataflash ICs. */ + #define DATAFLASH_PAGE_SIZE // TODO: Replace with the page size for the Dataflash ICs + + /** Total number of pages inside each of the board's dataflash ICs. */ + #define DATAFLASH_PAGES // TODO: Replace with the total number of pages inside one of the Dataflash ICs + + /* Inline Functions: */ + #if !defined(__DOXYGEN__) + /** Initializes the dataflash driver so that commands and data may be sent to an attached dataflash IC. + * The microcontroller's SPI driver MUST be initialized before any of the dataflash commands are used. + */ + static inline void Dataflash_Init(void) + { + DATAFLASH_CHIPCS_DDR |= DATAFLASH_CHIPCS_MASK; + DATAFLASH_CHIPCS_PORT |= DATAFLASH_CHIPCS_MASK; + } + + /** 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) + { + // TODO + } + + /** 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) + { + // TODO + } + + /** 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) + { + // TODO + } + + /** 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 & 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 = ((DATAFLASH_CHIPCS_PORT | DATAFLASH_CHIPCS_MASK) & ~ChipMask); + } + + /** 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; + + #if (DATAFLASH_TOTALCHIPS == 2) + if (PageAddress & 0x01) + Dataflash_SelectChip(DATAFLASH_CHIP2); + else + Dataflash_SelectChip(DATAFLASH_CHIP1); + #else + Dataflash_SelectChip(DATAFLASH_CHIP1); + #endif + } + + /** 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) + { + #if (DATAFLASH_TOTALCHIPS == 2) + PageAddress >>= 1; + #endif + + Dataflash_SendByte(PageAddress >> 5); + Dataflash_SendByte((PageAddress << 3) | (BufferByte >> 8)); + Dataflash_SendByte(BufferByte); + } + #endif + +#endif + |