adc.h
13.9 KB
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
/*
ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
2011,2012 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/>.
---
A special exception to the GPL can be applied should you wish to distribute
a combined work that includes ChibiOS/RT, without being obliged to provide
the source code for any proprietary components. See the file exception.txt
for full details of how and when the exception can be applied.
*/
/**
* @file adc.h
* @brief ADC Driver macros and structures.
*
* @addtogroup ADC
* @{
*/
#ifndef _ADC_H_
#define _ADC_H_
#if HAL_USE_ADC || defined(__DOXYGEN__)
/*===========================================================================*/
/* Driver constants. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver pre-compile time settings. */
/*===========================================================================*/
/**
* @name ADC configuration options
* @{
*/
/**
* @brief Enables synchronous APIs.
* @note Disabling this option saves both code and data space.
*/
#if !defined(ADC_USE_WAIT) || defined(__DOXYGEN__)
#define ADC_USE_WAIT TRUE
#endif
/**
* @brief Enables the @p adcAcquireBus() and @p adcReleaseBus() APIs.
* @note Disabling this option saves both code and data space.
*/
#if !defined(ADC_USE_MUTUAL_EXCLUSION) || defined(__DOXYGEN__)
#define ADC_USE_MUTUAL_EXCLUSION TRUE
#endif
/** @} */
/*===========================================================================*/
/* Derived constants and error checks. */
/*===========================================================================*/
#if ADC_USE_WAIT && !CH_USE_SEMAPHORES
#error "ADC driver requires CH_USE_SEMAPHORES when ADC_USE_WAIT is enabled"
#endif
/*===========================================================================*/
/* Driver data structures and types. */
/*===========================================================================*/
/**
* @brief Driver state machine possible states.
*/
typedef enum {
ADC_UNINIT = 0, /**< Not initialized. */
ADC_STOP = 1, /**< Stopped. */
ADC_READY = 2, /**< Ready. */
ADC_ACTIVE = 3, /**< Converting. */
ADC_COMPLETE = 4, /**< Conversion complete. */
ADC_ERROR = 5 /**< Conversion complete. */
} adcstate_t;
#include "adc_lld.h"
/*===========================================================================*/
/* Driver macros. */
/*===========================================================================*/
/**
* @name Low Level driver helper macros
* @{
*/
#if ADC_USE_WAIT || defined(__DOXYGEN__)
/**
* @brief Resumes a thread waiting for a conversion completion.
*
* @param[in] adcp pointer to the @p ADCDriver object
*
* @notapi
*/
#define _adc_reset_i(adcp) { \
if ((adcp)->thread != NULL) { \
Thread *tp = (adcp)->thread; \
(adcp)->thread = NULL; \
tp->p_u.rdymsg = RDY_RESET; \
chSchReadyI(tp); \
} \
}
/**
* @brief Resumes a thread waiting for a conversion completion.
*
* @param[in] adcp pointer to the @p ADCDriver object
*
* @notapi
*/
#define _adc_reset_s(adcp) { \
if ((adcp)->thread != NULL) { \
Thread *tp = (adcp)->thread; \
(adcp)->thread = NULL; \
chSchWakeupS(tp, RDY_RESET); \
} \
}
/**
* @brief Wakes up the waiting thread.
*
* @param[in] adcp pointer to the @p ADCDriver object
*
* @notapi
*/
#define _adc_wakeup_isr(adcp) { \
chSysLockFromIsr(); \
if ((adcp)->thread != NULL) { \
Thread *tp; \
tp = (adcp)->thread; \
(adcp)->thread = NULL; \
tp->p_u.rdymsg = RDY_OK; \
chSchReadyI(tp); \
} \
chSysUnlockFromIsr(); \
}
/**
* @brief Wakes up the waiting thread with a timeout message.
*
* @param[in] adcp pointer to the @p ADCDriver object
*
* @notapi
*/
#define _adc_timeout_isr(adcp) { \
chSysLockFromIsr(); \
if ((adcp)->thread != NULL) { \
Thread *tp; \
tp = (adcp)->thread; \
(adcp)->thread = NULL; \
tp->p_u.rdymsg = RDY_TIMEOUT; \
chSchReadyI(tp); \
} \
chSysUnlockFromIsr(); \
}
#else /* !ADC_USE_WAIT */
#define _adc_reset_i(adcp)
#define _adc_reset_s(adcp)
#define _adc_wakeup_isr(adcp)
#define _adc_timeout_isr(adcp)
#endif /* !ADC_USE_WAIT */
/**
* @brief Common ISR code, half buffer event.
* @details This code handles the portable part of the ISR code:
* - Callback invocation.
* .
* @note This macro is meant to be used in the low level drivers
* implementation only.
*
* @param[in] adcp pointer to the @p ADCDriver object
*
* @notapi
*/
#define _adc_isr_half_code(adcp) { \
if ((adcp)->grpp->end_cb != NULL) { \
(adcp)->grpp->end_cb(adcp, (adcp)->samples, (adcp)->depth / 2); \
} \
}
/**
* @brief Common ISR code, full buffer event.
* @details This code handles the portable part of the ISR code:
* - Callback invocation.
* - Waiting thread wakeup, if any.
* - Driver state transitions.
* .
* @note This macro is meant to be used in the low level drivers
* implementation only.
*
* @param[in] adcp pointer to the @p ADCDriver object
*
* @notapi
*/
#define _adc_isr_full_code(adcp) { \
if ((adcp)->grpp->circular) { \
/* Callback handling.*/ \
if ((adcp)->grpp->end_cb != NULL) { \
if ((adcp)->depth > 1) { \
/* Invokes the callback passing the 2nd half of the buffer.*/ \
size_t half = (adcp)->depth / 2; \
size_t half_index = half * (adcp)->grpp->num_channels; \
(adcp)->grpp->end_cb(adcp, (adcp)->samples + half_index, half); \
} \
else { \
/* Invokes the callback passing the whole buffer.*/ \
(adcp)->grpp->end_cb(adcp, (adcp)->samples, (adcp)->depth); \
} \
} \
} \
else { \
/* End conversion.*/ \
adc_lld_stop_conversion(adcp); \
if ((adcp)->grpp->end_cb != NULL) { \
(adcp)->state = ADC_COMPLETE; \
if ((adcp)->depth > 1) { \
/* Invokes the callback passing the 2nd half of the buffer.*/ \
size_t half = (adcp)->depth / 2; \
size_t half_index = half * (adcp)->grpp->num_channels; \
(adcp)->grpp->end_cb(adcp, (adcp)->samples + half_index, half); \
} \
else { \
/* Invokes the callback passing the whole buffer.*/ \
(adcp)->grpp->end_cb(adcp, (adcp)->samples, (adcp)->depth); \
} \
if ((adcp)->state == ADC_COMPLETE) \
(adcp)->state = ADC_READY; \
} \
else \
(adcp)->state = ADC_READY; \
(adcp)->grpp = NULL; \
_adc_wakeup_isr(adcp); \
} \
}
/**
* @brief Common ISR code, error event.
* @details This code handles the portable part of the ISR code:
* - Callback invocation.
* - Waiting thread timeout signaling, if any.
* - Driver state transitions.
* .
* @note This macro is meant to be used in the low level drivers
* implementation only.
*
* @param[in] adcp pointer to the @p ADCDriver object
* @param[in] err platform dependent error code
*
* @notapi
*/
#define _adc_isr_error_code(adcp, err) { \
adc_lld_stop_conversion(adcp); \
if ((adcp)->grpp->error_cb != NULL) { \
(adcp)->state = ADC_ERROR; \
(adcp)->grpp->error_cb(adcp, err); \
if ((adcp)->state == ADC_ERROR) \
(adcp)->state = ADC_READY; \
} \
(adcp)->grpp = NULL; \
_adc_timeout_isr(adcp); \
}
/** @} */
/*===========================================================================*/
/* External declarations. */
/*===========================================================================*/
#ifdef __cplusplus
extern "C" {
#endif
void adcInit(void);
void adcObjectInit(ADCDriver *adcp);
void adcStart(ADCDriver *adcp, const ADCConfig *config);
void adcStop(ADCDriver *adcp);
void adcStartConversion(ADCDriver *adcp,
const ADCConversionGroup *grpp,
adcsample_t *samples,
size_t depth);
void adcStartConversionI(ADCDriver *adcp,
const ADCConversionGroup *grpp,
adcsample_t *samples,
size_t depth);
void adcStopConversion(ADCDriver *adcp);
void adcStopConversionI(ADCDriver *adcp);
#if ADC_USE_WAIT
msg_t adcConvert(ADCDriver *adcp,
const ADCConversionGroup *grpp,
adcsample_t *samples,
size_t depth);
#endif
#if ADC_USE_MUTUAL_EXCLUSION || defined(__DOXYGEN__)
void adcAcquireBus(ADCDriver *adcp);
void adcReleaseBus(ADCDriver *adcp);
#endif /* ADC_USE_MUTUAL_EXCLUSION */
#ifdef __cplusplus
}
#endif
#endif /* HAL_USE_ADC */
#endif /* _ADC_H_ */
/** @} */