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
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
|
/******************************************************************************
* The MIT License
*
* Copyright (c) 2010 Perry Hung.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*****************************************************************************/
/**
* @file adc.h
*
* @brief Analog-to-Digital Conversion (ADC) header.
*/
#ifndef _ADC_H_
#define _ADC_H_
#include "libmaple.h"
#include "bitband.h"
#include "rcc.h"
#ifdef __cplusplus
extern "C"{
#endif
/** ADC register map type. */
typedef struct adc_reg_map {
__io uint32 SR; ///< Status register
__io uint32 CR1; ///< Control register 1
__io uint32 CR2; ///< Control register 2
__io uint32 SMPR1; ///< Sample time register 1
__io uint32 SMPR2; ///< Sample time register 2
__io uint32 JOFR1; ///< Injected channel data offset register 1
__io uint32 JOFR2; ///< Injected channel data offset register 2
__io uint32 JOFR3; ///< Injected channel data offset register 3
__io uint32 JOFR4; ///< Injected channel data offset register 4
__io uint32 HTR; ///< Watchdog high threshold register
__io uint32 LTR; ///< Watchdog low threshold register
__io uint32 SQR1; ///< Regular sequence register 1
__io uint32 SQR2; ///< Regular sequence register 2
__io uint32 SQR3; ///< Regular sequence register 3
__io uint32 JSQR; ///< Injected sequence register
__io uint32 JDR1; ///< Injected data register 1
__io uint32 JDR2; ///< Injected data register 2
__io uint32 JDR3; ///< Injected data register 3
__io uint32 JDR4; ///< Injected data register 4
__io uint32 DR; ///< Regular data register
} adc_reg_map;
/** ADC device type. */
typedef struct adc_dev {
adc_reg_map *regs; /**< Register map */
rcc_clk_id clk_id; /**< RCC clock information */
} adc_dev;
/** ADC1 device. */
extern const adc_dev *ADC1;
/** ADC2 device. */
extern const adc_dev *ADC2;
#ifdef STM32_HIGH_DENSITY
/** ADC3 device. */
extern const adc_dev *ADC3;
#endif
/*
* Register map base pointers
*/
/** ADC1 register map base pointer. */
#define ADC1_BASE ((adc_reg_map*)0x40012400)
/** ADC2 register map base pointer. */
#define ADC2_BASE ((adc_reg_map*)0x40012800)
#ifdef STM32_HIGH_DENSITY
/** ADC3 register map base pointer. */
#define ADC3_BASE ((adc_reg_map*)0x40013C00)
#endif
/*
* Register bit definitions
*/
/* Status register */
#define ADC_SR_AWD_BIT 0
#define ADC_SR_EOC_BIT 1
#define ADC_SR_JEOC_BIT 2
#define ADC_SR_JSTRT_BIT 3
#define ADC_SR_STRT_BIT 4
#define ADC_SR_AWD BIT(ADC_SR_AWD_BIT)
#define ADC_SR_EOC BIT(ADC_SR_EOC_BIT)
#define ADC_SR_JEOC BIT(ADC_SR_JEOC_BIT)
#define ADC_SR_JSTRT BIT(ADC_SR_JSTRT_BIT)
#define ADC_SR_STRT BIT(ADC_SR_STRT_BIT)
/* Control register 1 */
#define ADC_CR1_EOCIE_BIT 5
#define ADC_CR1_AWDIE_BIT 6
#define ADC_CR1_JEOCIE_BIT 7
#define ADC_CR1_SCAN_BIT 8
#define ADC_CR1_AWDSGL_BIT 9
#define ADC_CR1_JAUTO_BIT 10
#define ADC_CR1_DISCEN_BIT 11
#define ADC_CR1_JDISCEN_BIT 12
#define ADC_CR1_JAWDEN_BIT 22
#define ADC_CR1_AWDEN_BIT 23
#define ADC_CR1_AWDCH (0x1F)
#define ADC_CR1_EOCIE BIT(ADC_CR1_EOCIE_BIT)
#define ADC_CR1_AWDIE BIT(ADC_CR1_AWDIE_BIT)
#define ADC_CR1_JEOCIE BIT(ADC_CR1_JEOCIE_BIT)
#define ADC_CR1_SCAN BIT(ADC_CR1_SCAN_BIT)
#define ADC_CR1_AWDSGL BIT(ADC_CR1_AWDSGL_BIT)
#define ADC_CR1_JAUTO BIT(ADC_CR1_JAUTO_BIT)
#define ADC_CR1_DISCEN BIT(ADC_CR1_DISCEN_BIT)
#define ADC_CR1_JDISCEN BIT(ADC_CR1_JDISCEN_BIT)
#define ADC_CR1_DISCNUM (0xE000)
#define ADC_CR1_JAWDEN BIT(ADC_CR1_JAWDEN_BIT)
#define ADC_CR1_AWDEN BIT(ADC_CR1_AWDEN_BIT)
/* Control register 2 */
#define ADC_CR2_ADON_BIT 0
#define ADC_CR2_CONT_BIT 1
#define ADC_CR2_CAL_BIT 2
#define ADC_CR2_RSTCAL_BIT 3
#define ADC_CR2_DMA_BIT 8
#define ADC_CR2_ALIGN_BIT 11
#define ADC_CR2_JEXTTRIG_BIT 15
#define ADC_CR2_EXTTRIG_BIT 20
#define ADC_CR2_JSWSTART_BIT 21
#define ADC_CR2_SWSTART_BIT 22
#define ADC_CR2_TSEREFE_BIT 23
#define ADC_CR2_ADON BIT(ADC_CR2_ADON_BIT)
#define ADC_CR2_CONT BIT(ADC_CR2_CONT_BIT)
#define ADC_CR2_CAL BIT(ADC_CR2_CAL_BIT)
#define ADC_CR2_RSTCAL BIT(ADC_CR2_RSTCAL_BIT)
#define ADC_CR2_DMA BIT(ADC_CR2_DMA_BIT)
#define ADC_CR2_ALIGN BIT(ADC_CR2_ALIGN_BIT)
#define ADC_CR2_JEXTSEL (0x7000)
#define ADC_CR2_JEXTTRIG BIT(ADC_CR2_JEXTTRIG_BIT)
#define ADC_CR2_EXTSEL (0xE0000)
#define ADC_CR2_EXTTRIG BIT(ADC_CR2_EXTTRIG_BIT)
#define ADC_CR2_JSWSTART BIT(ADC_CR2_JSWSTART_BIT)
#define ADC_CR2_SWSTART BIT(ADC_CR2_SWSTART_BIT)
#define ADC_CR2_TSEREFE BIT(ADC_CR2_TSEREFE_BIT)
/* Sample time register 1 */
#define ADC_SMPR1_SMP17 (0x7 << 21)
#define ADC_SMPR1_SMP16 (0x7 << 18)
#define ADC_SMPR1_SMP15 (0x7 << 15)
#define ADC_SMPR1_SMP14 (0x7 << 12)
#define ADC_SMPR1_SMP13 (0x7 << 9)
#define ADC_SMPR1_SMP12 (0x7 << 6)
#define ADC_SMPR1_SMP11 (0x7 << 3)
#define ADC_SMPR1_SMP10 0x7
/* Sample time register 2 */
#define ADC_SMPR2_SMP9 (0x7 << 27)
#define ADC_SMPR2_SMP8 (0x7 << 24)
#define ADC_SMPR2_SMP7 (0x7 << 21)
#define ADC_SMPR2_SMP6 (0x7 << 18)
#define ADC_SMPR2_SMP5 (0x7 << 15)
#define ADC_SMPR2_SMP4 (0x7 << 12)
#define ADC_SMPR2_SMP3 (0x7 << 9)
#define ADC_SMPR2_SMP2 (0x7 << 6)
#define ADC_SMPR2_SMP1 (0x7 << 3)
#define ADC_SMPR2_SMP0 0x7
/* Injected channel data offset register */
#define ADC_JOFR_JOFFSET 0x3FF
/* Watchdog high threshold register */
#define ADC_HTR_HT 0x3FF
/* Watchdog low threshold register */
#define ADC_LTR_LT 0x3FF
/* Regular sequence register 1 */
#define ADC_SQR1_L (0x1F << 20)
#define ADC_SQR1_SQ16 (0x1F << 15)
#define ADC_SQR1_SQ15 (0x1F << 10)
#define ADC_SQR1_SQ14 (0x1F << 5)
#define ADC_SQR1_SQ13 0x1F
/* Regular sequence register 2 */
#define ADC_SQR2_SQ12 (0x1F << 25)
#define ADC_SQR2_SQ11 (0x1F << 20)
#define ADC_SQR2_SQ10 (0x1F << 16)
#define ADC_SQR2_SQ9 (0x1F << 10)
#define ADC_SQR2_SQ8 (0x1F << 5)
#define ADC_SQR2_SQ7 0x1F
/* Regular sequence register 3 */
#define ADC_SQR3_SQ6 (0x1F << 25)
#define ADC_SQR3_SQ5 (0x1F << 20)
#define ADC_SQR3_SQ4 (0x1F << 16)
#define ADC_SQR3_SQ3 (0x1F << 10)
#define ADC_SQR3_SQ2 (0x1F << 5)
#define ADC_SQR3_SQ1 0x1F
/* Injected sequence register */
#define ADC_JSQR_JL (0x3 << 20)
#define ADC_JSQR_JL_1CONV (0x0 << 20)
#define ADC_JSQR_JL_2CONV (0x1 << 20)
#define ADC_JSQR_JL_3CONV (0x2 << 20)
#define ADC_JSQR_JL_4CONV (0x3 << 20)
#define ADC_JSQR_JSQ4 (0x1F << 15)
#define ADC_JSQR_JSQ3 (0x1F << 10)
#define ADC_JSQR_JSQ2 (0x1F << 5)
#define ADC_JSQR_JSQ1 0x1F
/* Injected data registers */
#define ADC_JDR_JDATA 0xFFFF
/* Regular data register */
#define ADC_DR_ADC2DATA (0xFFFF << 16)
#define ADC_DR_DATA 0xFFFF
void adc_init(const adc_dev *dev);
/**
* @brief External event selector for regular group conversion.
* @see adc_set_extsel
*/
typedef enum adc_extsel_event {
ADC_ADC12_TIM1_CC1 = (0 << 17), /**< ADC1 and ADC2: Timer 1 CC1 event */
ADC_ADC12_TIM1_CC2 = (1 << 17), /**< ADC1 and ADC2: Timer 1 CC2 event */
ADC_ADC12_TIM1_CC3 = (2 << 17), /**< ADC1 and ADC2: Timer 1 CC3 event */
ADC_ADC12_TIM2_CC2 = (3 << 17), /**< ADC1 and ADC2: Timer 2 CC2 event */
ADC_ADC12_TIM3_TRGO = (4 << 17), /**< ADC1 and ADC2: Timer 3 TRGO event */
ADC_ADC12_TIM4_CC4 = (5 << 17), /**< ADC1 and ADC2: Timer 4 CC4 event */
ADC_ADC12_EXTI11 = (6 << 17), /**< ADC1 and ADC2: EXTI11 event */
#ifdef STM32_HIGH_DENSITY
ADC_ADC12_TIM8_TRGO = (6 << 17), /**< ADC1 and ADC2: Timer 8 TRGO
event (high density only) */
#endif
ADC_ADC12_SWSTART = (7 << 17), /**< ADC1 and ADC2: Software start */
#ifdef STM32_HIGH_DENSITY
ADC_ADC3_TIM3_CC1 = (0 << 17), /**< ADC3: Timer 3 CC1 event
(high density only) */
ADC_ADC3_TIM2_CC3 = (1 << 17), /**< ADC3: Timer 2 CC3 event
(high density only) */
ADC_ADC3_TIM1_CC3 = (2 << 17), /**< ADC3: Timer 1 CC3 event
(high density only) */
ADC_ADC3_TIM8_CC1 = (3 << 17), /**< ADC3: Timer 8 CC1 event
(high density only) */
ADC_ADC3_TIM8_TRGO = (4 << 17), /**< ADC3: Timer 8 TRGO event
(high density only) */
ADC_ADC3_TIM5_CC1 = (5 << 17), /**< ADC3: Timer 5 CC1 event
(high density only) */
ADC_ADC3_TIM5_CC3 = (6 << 17), /**< ADC3: Timer 5 CC3 event
(high density only) */
ADC_ADC3_SWSTART = (7 << 17), /**< ADC3: Software start (high
density only) */
#endif
ADC_SWSTART = (7 << 17) /**< ADC1, ADC2, ADC3: Software start */
} adc_extsel_event;
void adc_set_extsel(const adc_dev *dev, adc_extsel_event event);
void adc_foreach(void (*fn)(const adc_dev*));
/** ADC per-sample conversion times, in ADC clock cycles */
typedef enum {
ADC_SMPR_1_5, /**< 1.5 ADC cycles */
ADC_SMPR_7_5, /**< 7.5 ADC cycles */
ADC_SMPR_13_5, /**< 13.5 ADC cycles */
ADC_SMPR_28_5, /**< 28.5 ADC cycles */
ADC_SMPR_41_5, /**< 41.5 ADC cycles */
ADC_SMPR_55_5, /**< 55.5 ADC cycles */
ADC_SMPR_71_5, /**< 71.5 ADC cycles */
ADC_SMPR_239_5 /**< 239.5 ADC cycles */
} adc_smp_rate;
void adc_set_sample_rate(const adc_dev *dev, adc_smp_rate smp_rate);
void adc_calibrate(const adc_dev *dev);
uint16 adc_read(const adc_dev *dev, uint8 channel);
/**
* @brief Set the regular channel sequence length.
*
* Defines the total number of conversions in the regular channel
* conversion sequence.
*
* @param dev ADC device.
* @param length Regular channel sequence length, from 1 to 16.
*/
static inline void adc_set_reg_seqlen(const adc_dev *dev, uint8 length) {
uint32 tmp = dev->regs->SQR1;
tmp &= ~ADC_SQR1_L;
tmp |= (length - 1) << 20;
dev->regs->SQR1 = tmp;
}
/**
* @brief Set external trigger conversion mode event for regular channels
* @param dev ADC device
* @param enable If 1, conversion on external events is enabled; if 0,
* disabled.
*/
static inline void adc_set_exttrig(const adc_dev *dev, uint8 enable) {
*bb_perip(&dev->regs->CR2, ADC_CR2_EXTTRIG_BIT) = !!enable;
}
/**
* @brief Enable an adc peripheral
* @param dev ADC device to enable
*/
static inline void adc_enable(const adc_dev *dev) {
*bb_perip(&dev->regs->CR2, ADC_CR2_ADON_BIT) = 1;
}
/**
* @brief Disable an ADC peripheral
* @param dev ADC device to disable
*/
static inline void adc_disable(const adc_dev *dev) {
*bb_perip(&dev->regs->CR2, ADC_CR2_ADON_BIT) = 0;
}
/**
* @brief Disable all ADC peripherals.
*/
static inline void adc_disable_all(void) {
adc_foreach(adc_disable);
}
#ifdef __cplusplus
} // extern "C"
#endif
#endif
|
