220 lines
8.5 KiB
C
220 lines
8.5 KiB
C
/*
|
|
LUFA Library
|
|
Copyright (C) Dean Camera, 2012.
|
|
|
|
dean [at] fourwalledcubicle [dot] com
|
|
www.lufa-lib.org
|
|
*/
|
|
|
|
/*
|
|
Copyright 2012 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 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 DATAFLASH_CHIPCS_MASK
|
|
|
|
/** Mask for the first dataflash chip selected. */
|
|
#define DATAFLASH_CHIP1 // TODO: Replace with mask to hold /CS of first Dataflash low, and all others high
|
|
|
|
/** Mask for the second dataflash chip selected. */
|
|
#define DATAFLASH_CHIP2 // TODO: Replace with mask to hold /CS of second Dataflash low, and all others high
|
|
|
|
/** 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: */
|
|
/** 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 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
|
|
|