1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
|
/*
LUFA Library
Copyright (C) Dean Camera, 2009.
dean [at] fourwalledcubicle [dot] com
www.fourwalledcubicle.com
*/
/*
Copyright 2009 Dean Camera (dean [at] fourwalledcubicle [dot] com)
Permission to use, copy, modify, and distribute this software
and its documentation for any purpose and without fee is hereby
granted, 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
*
* This file is the master dispatch header file for the board-specific dataflash driver, for boards containing
* dataflash ICs for external non-volatile storage.
*
* User code should include this file, which will in turn include the correct dataflash driver header file for
* the currently selected board.
*
* If the BOARD value is set to BOARD_USER, this will include the /Board/Dataflash.h file in the user project
* directory.
*/
/** \ingroup Group_BoardDrivers
* @defgroup Group_Dataflash Dataflash Driver - LUFA/Drivers/Board/Dataflash.h
*
* \section Sec_Dependencies Module Source Dependencies
* The following files must be built with any user project that uses this module:
* - None
*
* \section Module Description
* Dataflash driver. This module provides an easy to use interface for the Dataflash ICs located on many boards,
* for the storage of large amounts of data into the Dataflash's non-volatile memory.
*
* If the BOARD value is set to BOARD_USER, this will include the /Board/Dataflash.h file in the user project
* directory. Otherwise, it will include the appropriate built in board driver header file.
*
* @{
*/
#ifndef __DATAFLASH_H__
#define __DATAFLASH_H__
/* Macros: */
#if !defined(__DOXYGEN__)
#define INCLUDE_FROM_DATAFLASH_H
#endif
/* Includes: */
#include "../Peripheral/SPI.h"
#include "../../Common/Common.h"
/* Enable C linkage for C++ Compilers: */
#if defined(__cplusplus)
extern "C" {
#endif
/* Public Interface - May be used in end-application: */
/* Macros: */
#if !defined(__DOXYGEN__)
#define __GET_DATAFLASH_MASK2(x, y) x ## y
#define __GET_DATAFLASH_MASK(x) __GET_DATAFLASH_MASK2(DATAFLASH_CHIP,x)
#endif
/** Retrieves the Dataflash chip select mask for the given Dataflash chip index.
*
* \param[in] index Index of the dataflash chip mask to retrieve
*
* \return Mask for the given Dataflash chip's /CS pin
*/
#define DATAFLASH_CHIP_MASK(index) __GET_DATAFLASH_MASK(index)
/* Pseudo-Function Macros: */
#if defined(__DOXYGEN__)
/** 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);
/** 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(uint8_t ChipMask);
/** Deselects the current dataflash chip, so that no dataflash is selected. */
static inline void Dataflash_DeselectChip(void);
#else
#define Dataflash_GetSelectedChip() (DATAFLASH_CHIPCS_PORT & DATAFLASH_CHIPCS_MASK)
#define Dataflash_SelectChip(mask) MACROS{ DATAFLASH_CHIPCS_PORT = ((DATAFLASH_CHIPCS_PORT \
& ~DATAFLASH_CHIPCS_MASK) | mask); }MACROE
#define Dataflash_DeselectChip() Dataflash_SelectChip(DATAFLASH_NO_CHIP)
#endif
/* Inline Functions: */
/** Sends a byte to the currently selected dataflash IC, and returns a byte from the dataflash.
*
* \param[in] 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)
{
return SPI_TransferByte(Byte);
}
/** Sends a byte to the currently selected dataflash IC, and ignores the next byte from the dataflash.
*
* \param[in] 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)
{
SPI_SendByte(Byte);
}
/** 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)
{
return SPI_ReceiveByte();
}
/* Includes: */
#if !defined(BOARD)
#error BOARD must be set in makefile to a value specified in BoardTypes.h.
#elif (BOARD == BOARD_USBKEY)
#include "USBKEY/Dataflash.h"
#elif (BOARD == BOARD_STK525)
#include "STK525/Dataflash.h"
#elif (BOARD == BOARD_STK526)
#include "STK526/Dataflash.h"
#elif (BOARD == BOARD_XPLAIN)
#include "XPLAIN/Dataflash.h"
#elif (BOARD == BOARD_XPLAIN_REV1)
#include "XPLAIN/Dataflash.h"
#elif (BOARD == BOARD_EVK527)
#include "EVK527/Dataflash.h"
#elif (BOARD == BOARD_USER)
#include "Board/Dataflash.h"
#else
#error The selected board does not contain a dataflash IC.
#endif
/* Inline Functions: */
/** Initializes 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;
}
/** 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();
}
/** 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);
/** 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);
/* Disable C linkage for C++ Compilers: */
#if defined(__cplusplus)
}
#endif
#endif
/** @} */
|