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
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
|
/*
ChibiOS/RT - Copyright (C) 2006-2007 Giovanni Di Sirio.
This file is part of ChibiOS/RT.
ChibiOS/RT is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
ChibiOS/RT is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* @file os/io/templates/pal_lld.h
* @brief PAL subsystem low level driver header template
* @addtogroup PAL_LLD
* @{
*/
#ifndef _PAL_LLD_H_
#define _PAL_LLD_H_
/*===========================================================================*/
/* Unsupported modes and specific modes */
/*===========================================================================*/
/*===========================================================================*/
/* I/O Ports Types and constants. */
/*===========================================================================*/
/**
* @brief Generic I/O ports static initializer.
* @details An instance of this structure must be passed to @p palInit() at
* system startup time in order to initialized the digital I/O
* subsystem. This represents only the initial setup, specific pads
* or whole ports can be reprogrammed at later time.
*
* @note This structure content is architecture dependent. The nome should be
* changed to include the architecture name following this pattern:<br>
* - [ARCH][CELL]Config.
* .
* As example:<br>
* - MSP430DIOConfig.
* .
*/
typedef struct {
} GenericConfig;
/**
* @brief Width, in bits, of an I/O port.
*/
#define PAL_IOPORTS_WIDTH 32
/**
* @brief Whole port mask.
* @brief This macro specifies all the valid bits into a port.
*/
#define PAL_WHOLE_PORT ((ioportmask_t)0xFFFFFFFF)
/**
* @brief Digital I/O port sized unsigned type.
*/
typedef uint32_t ioportmask_t;
/**
* @brief Port Identifier.
* @details This type can be a scalar or some kind of pointer, do not make
* any assumption about it, use the provided macros when populating
* variables of this type.
*/
typedef uint32_t ioportid_t;
/*===========================================================================*/
/* I/O Ports Identifiers. */
/*===========================================================================*/
/**
* @brief First I/O port identifier.
* @details Low level drivers can define multiple ports, it is suggested to
* use this naming convention.
*/
#define IOPORT_A 0
/*===========================================================================*/
/* Implementation, some of the following macros could be implemented as */
/* functions, if so please put them in pal_lld.c. */
/*===========================================================================*/
/**
* @brief Low level PAL subsystem initialization.
*
* @param[in] config the architecture-dependent ports configuration
*/
#define pal_lld_init(config)
/**
* @brief Reads the physical I/O port states.
*
* @param[in] port the port identifier
* @return The port bits.
*
* @note This function is not meant to be invoked directly by the application
* code.
*/
#define pal_lld_readport(port)
/**
* @brief Reads the output latch.
* @details The purpose of this function is to read back the latched output
* value.
*
* @param[in] port the port identifier
* @return The latched logical states.
*
* @note This function is not meant to be invoked directly by the application
* code.
*/
#define pal_lld_readlatch(port)
/**
* @brief Writes a bits mask on a I/O port.
*
* @param[in] port the port identifier
* @param[in] bits the bits to be written on the specified port
*
* @note This function is not meant to be invoked directly by the application
* code.
*/
#define pal_lld_writeport(port, bits)
/**
* @brief Sets a bits mask on a I/O port.
*
* @param[in] port the port identifier
* @param[in] bits the bits to be ORed on the specified port
*
* @note This function is not meant to be invoked directly by the application
* code.
* @note The @ref PAL provides a default software implementation of this
* functionality, implement this function if can optimize it by using
* special hardware functionalities or special coding.
*/
#define pal_lld_setport(port, bits)
/**
* @brief Clears a bits mask on a I/O port.
*
* @param[in] port the port identifier
* @param[in] bits the bits to be cleared on the specified port
*
* @note This function is not meant to be invoked directly by the application
* code.
* @note The @ref PAL provides a default software implementation of this
* functionality, implement this function if can optimize it by using
* special hardware functionalities or special coding.
*/
#define pal_lld_clearport(port, bits)
/**
* @brief Toggles a bits mask on a I/O port.
*
* @param[in] port the port identifier
* @param[in] bits the bits to be XORed on the specified port
*
* @note This function is not meant to be invoked directly by the application
* code.
* @note The @ref PAL provides a default software implementation of this
* functionality, implement this function if can optimize it by using
* special hardware functionalities or special coding.
*/
#define pal_lld_toggleport(port, bits)
/**
* @brief Reads a group of bits.
*
* @param[in] port the port identifier
* @param[in] mask the group mask
* @param[in] offset the group bit offset within the port
* @return The group logical states.
*
* @note This function is not meant to be invoked directly by the application
* code.
* @note The @ref PAL provides a default software implementation of this
* functionality, implement this function if can optimize it by using
* special hardware functionalities or special coding.
*/
#define pal_lld_readgroup(port, mask, offset)
/**
* @brief Writes a group of bits.
*
* @param[in] port the port identifier
* @param[in] mask the group mask
* @param[in] offset the group bit offset within the port
* @param[in] bits the bits to be written. Values exceeding the group width
* are masked.
*
* @note This function is not meant to be invoked directly by the application
* code.
* @note The @ref PAL provides a default software implementation of this
* functionality, implement this function if can optimize it by using
* special hardware functionalities or special coding.
*/
#define pal_lld_writegroup(port, mask, offset, bits)
/**
* @brief Pads group mode setup.
* @details This function programs a pads group belonging to the same port
* with the specified mode.
*
* @param[in] port the port identifier
* @param[in] mask the group mask
* @param[in] mode the mode
*
* @note This function is not meant to be invoked directly by the application
* code.
* @note Programming an unknown or unsupported mode is silently ignored.
*/
#define pal_lld_setgroupmode(port, mask, mode)
/**
* @brief Reads a logical state from an I/O pad.
*
* @param[in] port the port identifier
* @param[in] pad the pad number within the port
* @return The logical state.
* @retval 0 low logical state.
* @retval 1 high logical state.
*
* @note This function is not meant to be invoked directly by the application
* code.
* @note The @ref PAL provides a default software implementation of this
* functionality, implement this function if can optimize it by using
* special hardware functionalities or special coding.
*/
#define pal_lld_readpad(port, pad)
/**
* @brief Writes a logical state on an output pad.
*
* @param[in] port the port identifier
* @param[in] pad the pad number within the port
* @param[out] bit the logical value, the value must be @p 0 or @p 1
*
* @note This function is not meant to be invoked directly by the application
* code.
* @note The @ref PAL provides a default software implementation of this
* functionality, implement this function if can optimize it by using
* special hardware functionalities or special coding.
*/
#define pal_lld_writepad(port, pad, bit)
/**
* @brief Sets a pad logical state to @p 1.
*
* @param[in] port the port identifier
* @param[in] pad the pad number within the port
*
* @note This function is not meant to be invoked directly by the application
* code.
* @note The @ref PAL provides a default software implementation of this
* functionality, implement this function if can optimize it by using
* special hardware functionalities or special coding.
*/
#define pal_lld_setpad(port, pad)
/**
* @brief Clears a pad logical state to @p 0.
*
* @param[in] port the port identifier
* @param[in] pad the pad number within the port
*
* @note This function is not meant to be invoked directly by the application
* code.
* @note The @ref PAL provides a default software implementation of this
* functionality, implement this function if can optimize it by using
* special hardware functionalities or special coding.
*/
#define pal_lld_clearpad(port, pad)
/**
* @brief Toggles a pad logical state.
*
* @param[in] port the port identifier
* @param[in] pad the pad number within the port
*
* @note This function is not meant to be invoked directly by the application
* code.
* @note The @ref PAL provides a default software implementation of this
* functionality, implement this function if can optimize it by using
* special hardware functionalities or special coding.
*/
#define pal_lld_togglepad(port, pad)
/**
* @brief Pad mode setup.
* @details This function programs a pad with the specified mode.
*
* @param[in] port the port identifier
* @param[in] pad the pad number within the port
* @param[in] mode the mode
*
* @note This function is not meant to be invoked directly by the application
* code.
* @note The @ref PAL provides a default software implementation of this
* functionality, implement this function if can optimize it by using
* special hardware functionalities or special coding.
* @note Programming an unknown or unsupported mode is silently ignored.
*/
#define pal_lld_setpadmode(port, pad, mode)
#endif /* _PAL_LLD_H_ */
/** @} */
|