Update XMEGA board drivers to use the port inversion feature of the XMEGA architecture rather than performing the inversion in software. Add partially completed XMEGA-B1-XPLAINED Dataflash board driver and revert implementation of the XMEGA-A3BU-XPLAINED Dataflash driver as the chip is connected to the USART, not the SPI interface.
Dean Camera
13 years ago
parent
7a1033025b
commit
a2d18e46f8
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/*
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LUFA Library |
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Copyright (C) Dean Camera, 2012. |
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dean [at] fourwalledcubicle [dot] com |
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www.lufa-lib.org |
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*/ |
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/*
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Copyright 2012 Dean Camera (dean [at] fourwalledcubicle [dot] com) |
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Permission to use, copy, modify, distribute, and sell this |
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software and its documentation for any purpose is hereby granted |
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without fee, provided that the above copyright notice appear in |
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all copies and that both that the copyright notice and this |
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permission notice and warranty disclaimer appear in supporting |
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documentation, and that the name of the author not be used in |
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advertising or publicity pertaining to distribution of the |
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software without specific, written prior permission. |
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The author disclaim all warranties with regard to this |
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software, including all implied warranties of merchantability |
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and fitness. In no event shall the author be liable for any |
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special, indirect or consequential damages or any damages |
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whatsoever resulting from loss of use, data or profits, whether |
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in an action of contract, negligence or other tortious action, |
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arising out of or in connection with the use or performance of |
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this software. |
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*/ |
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/** \file
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* \brief Board specific Dataflash driver header for the Atmel XMEGA A3BU Xplained. |
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* \copydetails Group_Dataflash_A3BU_XPLAINED |
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* |
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* \note This file should not be included directly. It is automatically included as needed by the dataflash driver |
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* dispatch header located in LUFA/Drivers/Board/Dataflash.h. |
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*/ |
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/** \ingroup Group_Dataflash
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* \defgroup Group_Dataflash_A3BU_XPLAINED A3BU_XPLAINED |
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* \brief Board specific Dataflash driver header for the Atmel XMEGA A3BU Xplained. |
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* |
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* Board specific Dataflash driver header for the Atmel XMEGA A3BU Xplained board. |
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* |
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* @{ |
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*/ |
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#ifndef __DATAFLASH_A3BU_XPLAINED_H__ |
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#define __DATAFLASH_A3BU_XPLAINED_H__ |
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/* Includes: */ |
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#include "../../../../Common/Common.h" |
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#include "../../../Misc/AT45DB642D.h" |
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/* Preprocessor Checks: */ |
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#if !defined(__INCLUDE_FROM_DATAFLASH_H) |
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#error Do not include this file directly. Include LUFA/Drivers/Board/Dataflash.h instead. |
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#endif |
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/* Private Interface - For use in library only: */ |
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#if !defined(__DOXYGEN__) |
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/* Macros: */ |
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#define DATAFLASH_CHIPCS_MASK (1 << 2) |
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#define DATAFLASH_CHIPCS_PORT PORTD |
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#endif |
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/* Public Interface - May be used in end-application: */ |
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/* Macros: */ |
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/** Constant indicating the total number of dataflash ICs mounted on the selected board. */ |
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#define DATAFLASH_TOTALCHIPS 1 |
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/** Mask for no dataflash chip selected. */ |
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#define DATAFLASH_NO_CHIP DATAFLASH_CHIPCS_MASK |
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/** Mask for the first dataflash chip selected. */ |
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#define DATAFLASH_CHIP1 0 |
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/** Internal main memory page size for the board's dataflash ICs. */ |
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#define DATAFLASH_PAGE_SIZE 1024 |
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/** Total number of pages inside each of the board's dataflash ICs. */ |
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#define DATAFLASH_PAGES 8192 |
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/* Inline Functions: */ |
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/** Initializes the dataflash driver so that commands and data may be sent to an attached dataflash IC.
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* The microcontroller's SPI driver MUST be initialized before any of the dataflash commands are used. |
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*/ |
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static inline void Dataflash_Init(void) |
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{ |
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DATAFLASH_CHIPCS_PORT.DIRSET = DATAFLASH_CHIPCS_MASK; |
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DATAFLASH_CHIPCS_PORT.OUTSET = DATAFLASH_CHIPCS_MASK; |
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} |
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/** Sends a byte to the currently selected dataflash IC, and returns a byte from the dataflash.
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* |
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* \param[in] Byte Byte of data to send to the dataflash |
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* |
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* \return Last response byte from the dataflash |
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*/ |
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static inline uint8_t Dataflash_TransferByte(const uint8_t Byte) ATTR_ALWAYS_INLINE; |
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static inline uint8_t Dataflash_TransferByte(const uint8_t Byte) |
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{ |
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// TODO: USART in SPI mode on PORT C
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#warning The Dataflash driver for the selected board is currently incomplete and non-functional. |
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return 0; |
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} |
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/** Sends a byte to the currently selected dataflash IC, and ignores the next byte from the dataflash.
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* |
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* \param[in] Byte Byte of data to send to the dataflash |
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*/ |
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static inline void Dataflash_SendByte(const uint8_t Byte) ATTR_ALWAYS_INLINE; |
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static inline void Dataflash_SendByte(const uint8_t Byte) |
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{ |
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return; // TODO
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} |
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/** Sends a dummy byte to the currently selected dataflash IC, and returns the next byte from the dataflash.
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* |
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* \return Last response byte from the dataflash |
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*/ |
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static inline uint8_t Dataflash_ReceiveByte(void) ATTR_ALWAYS_INLINE ATTR_WARN_UNUSED_RESULT; |
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static inline uint8_t Dataflash_ReceiveByte(void) |
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{ |
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return 0; // TODO
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} |
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/** Determines the currently selected dataflash chip.
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* |
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* \return Mask of the currently selected Dataflash chip, either \ref DATAFLASH_NO_CHIP if no chip is selected |
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* or a DATAFLASH_CHIPn mask (where n is the chip number). |
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*/ |
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static inline uint8_t Dataflash_GetSelectedChip(void) ATTR_ALWAYS_INLINE ATTR_WARN_UNUSED_RESULT; |
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static inline uint8_t Dataflash_GetSelectedChip(void) |
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{ |
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return (DATAFLASH_CHIPCS_PORT.OUT & DATAFLASH_CHIPCS_MASK); |
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} |
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/** Selects the given dataflash chip.
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* |
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* \param[in] ChipMask Mask of the Dataflash IC to select, in the form of DATAFLASH_CHIPn mask (where n is |
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* the chip number). |
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*/ |
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static inline void Dataflash_SelectChip(const uint8_t ChipMask) ATTR_ALWAYS_INLINE; |
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static inline void Dataflash_SelectChip(const uint8_t ChipMask) |
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{ |
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DATAFLASH_CHIPCS_PORT.OUT = ((DATAFLASH_CHIPCS_PORT.OUT & ~DATAFLASH_CHIPCS_MASK) | ChipMask); |
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} |
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/** Deselects the current dataflash chip, so that no dataflash is selected. */ |
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static inline void Dataflash_DeselectChip(void) ATTR_ALWAYS_INLINE; |
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static inline void Dataflash_DeselectChip(void) |
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{ |
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Dataflash_SelectChip(DATAFLASH_NO_CHIP); |
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} |
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/** Selects a dataflash IC from the given page number, which should range from 0 to
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* ((DATAFLASH_PAGES * DATAFLASH_TOTALCHIPS) - 1). For boards containing only one |
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* dataflash IC, this will select DATAFLASH_CHIP1. If the given page number is outside |
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* the total number of pages contained in the boards dataflash ICs, all dataflash ICs |
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* are deselected. |
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* |
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* \param[in] PageAddress Address of the page to manipulate, ranging from |
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* 0 to ((DATAFLASH_PAGES * DATAFLASH_TOTALCHIPS) - 1). |
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*/ |
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static inline void Dataflash_SelectChipFromPage(const uint16_t PageAddress) |
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{ |
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Dataflash_DeselectChip(); |
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if (PageAddress >= (DATAFLASH_PAGES * DATAFLASH_TOTALCHIPS)) |
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return; |
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if (PageAddress & 0x01) |
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Dataflash_SelectChip(DATAFLASH_CHIP2); |
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else |
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Dataflash_SelectChip(DATAFLASH_CHIP1); |
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} |
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/** Toggles the select line of the currently selected dataflash IC, so that it is ready to receive
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* a new command. |
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*/ |
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static inline void Dataflash_ToggleSelectedChipCS(void) |
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{ |
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uint8_t SelectedChipMask = Dataflash_GetSelectedChip(); |
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Dataflash_DeselectChip(); |
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Dataflash_SelectChip(SelectedChipMask); |
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} |
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/** Spin-loops while the currently selected dataflash is busy executing a command, such as a main
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* memory page program or main memory to buffer transfer. |
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*/ |
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static inline void Dataflash_WaitWhileBusy(void) |
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{ |
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Dataflash_ToggleSelectedChipCS(); |
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Dataflash_SendByte(DF_CMD_GETSTATUS); |
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while (!(Dataflash_ReceiveByte() & DF_STATUS_READY)); |
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Dataflash_ToggleSelectedChipCS(); |
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} |
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/** Sends a set of page and buffer address bytes to the currently selected dataflash IC, for use with
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* dataflash commands which require a complete 24-bit address. |
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* |
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* \param[in] PageAddress Page address within the selected dataflash IC |
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* \param[in] BufferByte Address within the dataflash's buffer |
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*/ |
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static inline void Dataflash_SendAddressBytes(uint16_t PageAddress, |
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const uint16_t BufferByte) |
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{ |
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PageAddress >>= 1; |
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Dataflash_SendByte(PageAddress >> 5); |
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Dataflash_SendByte((PageAddress << 3) | (BufferByte >> 8)); |
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Dataflash_SendByte(BufferByte); |
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} |
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#endif |
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/** @} */ |
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