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
323
324
325
326
327
328
329
330
331
332
333
334
335
336
|
/*
ChibiOS/RT - Copyright (C) 2006-2014 Giovanni Di Sirio
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
/**
* @file AVR/pal_lld.h
* @brief AVR GPIO low level driver header.
*
* @addtogroup PAL
* @{
*/
#ifndef _PAL_LLD_H_
#define _PAL_LLD_H_
#include "avr_pins.h"
#if HAL_USE_PAL || defined(__DOXYGEN__)
/*===========================================================================*/
/* Unsupported modes and specific modes */
/*===========================================================================*/
#undef PAL_MODE_INPUT_PULLDOWN
#undef PAL_MODE_OUTPUT_OPENDRAIN
/*===========================================================================*/
/* I/O Ports Types and constants. */
/*===========================================================================*/
/**
* @brief Width, in bits, of an I/O port.
*/
#define PAL_IOPORTS_WIDTH 8
/**
* @brief Whole port mask.
* @details This macro specifies all the valid bits into a port.
*/
#define PAL_WHOLE_PORT ((ioportmask_t)0xFF)
/**
* @brief AVR setup registers.
*/
typedef struct {
uint8_t out;
uint8_t dir;
} avr_gpio_setup_t;
/**
* @brief AVR registers block.
* @note On some devices registers do not follow this layout on some
* ports, the ports with abnormal layout cannot be used through
* PAL driver. Example: PORT F on Mega128.
*/
typedef struct {
volatile uint8_t in;
volatile uint8_t dir;
volatile uint8_t out;
} avr_gpio_registers_t;
/**
* @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.
*/
typedef struct {
#if defined(PORTA) || defined(__DOXYGEN__)
avr_gpio_setup_t porta;
#endif
#if defined(PORTB) || defined(__DOXYGEN__)
avr_gpio_setup_t portb;
#endif
#if defined(PORTC) || defined(__DOXYGEN__)
avr_gpio_setup_t portc;
#endif
#if defined(PORTD) || defined(__DOXYGEN__)
avr_gpio_setup_t portd;
#endif
#if defined(PORTE) || defined(__DOXYGEN__)
avr_gpio_setup_t porte;
#endif
#if defined(PORTF) || defined(__DOXYGEN__)
avr_gpio_setup_t portf;
#endif
#if defined(PORTG) || defined(__DOXYGEN__)
avr_gpio_setup_t portg;
#endif
#if defined(PORTH) || defined(__DOXYGEN__)
avr_gpio_setup_t porth;
#endif
#if defined(PORTJ) || defined(__DOXYGEN__)
avr_gpio_setup_t portj;
#endif
#if defined(PORTK) || defined(__DOXYGEN__)
avr_gpio_setup_t portk;
#endif
#if defined(PORTL) || defined(__DOXYGEN__)
avr_gpio_setup_t portl;
#endif
} PALConfig;
/**
* @brief Digital I/O port sized unsigned type.
*/
typedef uint8_t ioportmask_t;
/**
* @brief Digital I/O modes.
*/
typedef uint8_t iomode_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 avr_gpio_registers_t *ioportid_t;
/*===========================================================================*/
/* I/O Ports Identifiers. */
/*===========================================================================*/
#if defined(PORTA) || defined(__DOXYGEN__)
/**
* @brief GPIO port A identifier.
*/
#define IOPORT1 ((volatile avr_gpio_registers_t *)&PINA)
#endif
#if defined(PORTB) || defined(__DOXYGEN__)
/**
* @brief GPIO port B identifier.
*/
#define IOPORT2 ((volatile avr_gpio_registers_t *)&PINB)
#endif
#if defined(PORTC) || defined(__DOXYGEN__)
/**
* @brief GPIO port C identifier.
*/
#define IOPORT3 ((volatile avr_gpio_registers_t *)&PINC)
#endif
#if defined(PORTD) || defined(__DOXYGEN__)
/**
* @brief GPIO port D identifier.
*/
#define IOPORT4 ((volatile avr_gpio_registers_t *)&PIND)
#endif
#if defined(PORTE) || defined(__DOXYGEN__)
/**
* @brief GPIO port E identifier.
*/
#define IOPORT5 ((volatile avr_gpio_registers_t *)&PINE)
#endif
#if defined(PORTF) || defined(__DOXYGEN__)
/**
* @brief GPIO port F identifier.
*/
#define IOPORT6 ((volatile avr_gpio_registers_t *)&PINF)
#endif
#if defined(PORTG) || defined(__DOXYGEN__)
/**
* @brief GPIO port G identifier.
*/
#define IOPORT7 ((volatile avr_gpio_registers_t *)&PING)
#endif
#if defined(PORTH) || defined(__DOXYGEN__)
/**
* @brief GPIO port H identifier.
*/
#define IOPORT8 ((volatile avr_gpio_registers_t *)&PINH)
#endif
#if defined(PORTJ) || defined(__DOXYGEN__)
/**
* @brief GPIO port J identifier.
*/
#define IOPORT9 ((volatile avr_gpio_registers_t *)&PINJ)
#endif
#if defined(PORTK) || defined(__DOXYGEN__)
/**
* @brief GPIO port K identifier.
*/
#define IOPORT10 ((volatile avr_gpio_registers_t *)&PINK)
#endif
#if defined(PORTL) || defined(__DOXYGEN__)
/**
* @brief GPIO port L identifier.
*/
#define IOPORT11 ((volatile avr_gpio_registers_t *)&PINL)
#endif
#if defined(PORTADC) || defined(__DOXYGEN__)
/**
* @brief GPIO port ADC identifier.
*/
#define IOPORTADC ((volatile avr_gpio_registers_t *)&PINADC)
#endif
#if defined(PORT_SPI1) || defined(__DOXYGEN__)
/**
* @brief GPIO port SPI1 identifier.
*/
#define IOPORTSPI1 ((volatile avr_gpio_registers_t *)&PIN_SPI1)
#endif
/*===========================================================================*/
/* 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
*
* @notapi
*/
#define pal_lld_init(config) _pal_lld_init(config)
/**
* @brief Reads the physical I/O port states.
*
* @param[in] port port identifier
* @return The port bits.
*
* @notapi
*/
#define pal_lld_readport(port) ((port)->in)
/**
* @brief Reads the output latch.
* @details The purpose of this function is to read back the latched output
* value.
*
* @param[in] port port identifier
* @return The latched logical states.
*
* @notapi
*/
#define pal_lld_readlatch(port) ((port)->out)
/**
* @brief Writes a bits mask on a I/O port.
*
* @param[in] port port identifier
* @param[in] bits bits to be written on the specified port
*
* @notapi
*/
#define pal_lld_writeport(port, bits) ((port)->out = bits)
/**
* @brief Pads group mode setup.
* @details This function programs a pads group belonging to the same port
* with the specified mode.
* @note Programming an unknown or unsupported mode is silently ignored.
*
* @param[in] port port identifier
* @param[in] mask group mask
* @param[in] offset group bit offset within the port
* @param[in] mode group mode
*
* @notapi
*/
#define pal_lld_setgroupmode(port, mask, offset, mode) \
_pal_lld_setgroupmode(port, mask << offset, mode)
/**
* @brief Sets a pad logical state to @p PAL_HIGH.
*
* @param[in] port port identifier
* @param[in] pad pad number within the port
*
* @notapi
*/
#define pal_lld_setpad(port, pad) \
__asm__ __volatile__( \
"sbi %0,%1\n\t" :: "I" (_SFR_IO_ADDR(port->out)), "I" (pad) \
)
/**
* @brief Clears a pad logical state to @p PAL_LOW.
*
* @param[in] port port identifier
* @param[in] pad pad number within the port
*
* @notapi
*/
#define pal_lld_clearpad(port, pad) \
__asm__ __volatile__( \
"cbi %0,%1\n\t" :: "I" (_SFR_IO_ADDR(port->out)), "I" (pad) \
)
extern ROMCONST PALConfig pal_default_config;
#ifdef __cplusplus
extern "C" {
#endif
void _pal_lld_init(const PALConfig *config);
void _pal_lld_setgroupmode(ioportid_t port,
ioportmask_t mask,
iomode_t mode);
#ifdef __cplusplus
}
#endif
#endif /* HAL_USE_PAL */
#endif /* _PAL_LLD_H_ */
/** @} */
|
