From 237ea87c4fcb4865863fc15e07e179323caa7881 Mon Sep 17 00:00:00 2001 From: Håvard Espeland Date: Sat, 5 Feb 2011 19:26:39 +0100 Subject: Fork of LUFA CDC Bootloader Initial commit --- LUFA/Drivers/Board/EVK527/Dataflash.h | 184 ++++++++++++++++++++++++++++++++++ 1 file changed, 184 insertions(+) create mode 100644 LUFA/Drivers/Board/EVK527/Dataflash.h (limited to 'LUFA/Drivers/Board/EVK527/Dataflash.h') diff --git a/LUFA/Drivers/Board/EVK527/Dataflash.h b/LUFA/Drivers/Board/EVK527/Dataflash.h new file mode 100644 index 0000000..9f6c6d8 --- /dev/null +++ b/LUFA/Drivers/Board/EVK527/Dataflash.h @@ -0,0 +1,184 @@ +/* + LUFA Library + Copyright (C) Dean Camera, 2010. + + dean [at] fourwalledcubicle [dot] com + www.lufa-lib.org +*/ + +/* + Copyright 2010 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 disclaim 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 EVK527. + * + * Board specific Dataflash driver header for the Atmel EVK527. + * + * \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_EVK527 EVK527 + * + * Board specific Dataflash driver header for the Atmel EVK527. + * + * \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. + * + * @{ + */ + +#ifndef __DATAFLASH_EVK527_H__ +#define __DATAFLASH_EVK527_H__ + + /* Includes: */ + #include "AT45DB321C.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 (1 << 6) + #define DATAFLASH_CHIPCS_DDR DDRE + #define DATAFLASH_CHIPCS_PORT PORTE + #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 DATAFLASH_CHIPCS_MASK + + /** Mask for the first dataflash chip selected. */ + #define DATAFLASH_CHIP1 0 + + /** Internal main memory page size for the board's dataflash IC. */ + #define DATAFLASH_PAGE_SIZE 512 + + /** Total number of pages inside the board's dataflash IC. */ + #define DATAFLASH_PAGES 8192 + + /* Inline Functions: */ + /** Initialises the dataflash driver so that commands and data may be sent to an attached dataflash IC. + * The AVR'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; + } + + /** 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 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 + * ((DATAFLASH_PAGES * DATAFLASH_TOTALCHIPS) - 1). + */ + static inline void Dataflash_SelectChipFromPage(const uint16_t PageAddress) + { + Dataflash_DeselectChip(); + + if (PageAddress >= DATAFLASH_PAGES) + 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-byte 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 + +/** @} */ + -- cgit v1.2.3