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   1 /*
   2  * Copyright © 2012 Keith Packard <keithp@keithp.com>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; version 2 of the License.
   7  *
   8  * This program is distributed in the hope that it will be useful, but
   9  * WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11  * General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along
  14  * with this program; if not, write to the Free Software Foundation, Inc.,
  15  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
  16  */
  17
  18 #include <ao.h>
  19 #include <ao_data.h>
  20
  21 static uint8_t                  ao_adc_ready;
  22
  23 #define AO_ADC_CR2_VAL          ((0 << STM_ADC_CR2_SWSTART) |           \
  24                                  (STM_ADC_CR2_EXTEN_DISABLE << STM_ADC_CR2_EXTEN) | \
  25                                  (0 << STM_ADC_CR2_EXTSEL) |            \
  26                                  (0 << STM_ADC_CR2_JWSTART) |           \
  27                                  (STM_ADC_CR2_JEXTEN_DISABLE << STM_ADC_CR2_JEXTEN) | \
  28                                  (0 << STM_ADC_CR2_JEXTSEL) |           \
  29                                  (0 << STM_ADC_CR2_ALIGN) |             \
  30                                  (0 << STM_ADC_CR2_EOCS) |              \
  31                                  (1 << STM_ADC_CR2_DDS) |               \
  32                                  (1 << STM_ADC_CR2_DMA) |               \
  33                                  (STM_ADC_CR2_DELS_UNTIL_READ << STM_ADC_CR2_DELS) | \
  34                                  (0 << STM_ADC_CR2_CONT) |              \
  35                                  (1 << STM_ADC_CR2_ADON))
  36
  37 /*
  38  * Callback from DMA ISR
  39  *
  40  * Mark time in ring, shut down DMA engine
  41  */
  42 static void ao_adc_done(int index)
  43 {
  44         (void) index;
  45         AO_DATA_PRESENT(AO_DATA_ADC);
  46         ao_dma_done_transfer(STM_DMA_INDEX(STM_DMA_CHANNEL_ADC1));
  47         if (ao_data_present == AO_DATA_ALL) {
  48 #if HAS_MS5607
  49                 ao_data_ring[ao_data_head].ms5607_raw = ao_ms5607_current;
  50 #endif
  51 #if HAS_MMA655X
  52                 ao_data_ring[ao_data_head].mma655x = ao_mma655x_current;
  53 #endif
  54 #if HAS_HMC5883
  55                 ao_data_ring[ao_data_head].hmc5883 = ao_hmc5883_current;
  56 #endif
  57 #if HAS_MPU6000
  58                 ao_data_ring[ao_data_head].mpu6000 = ao_mpu6000_current;
  59 #endif
  60                 ao_data_ring[ao_data_head].tick = ao_tick_count;
  61                 ao_data_head = ao_data_ring_next(ao_data_head);
  62                 ao_wakeup((void *) &ao_data_head);
  63         }
  64         ao_adc_ready = 1;
  65 }
  66
  67 /*
  68  * Start the ADC sequence using the DMA engine
  69  */
  70 void
  71 ao_adc_poll(void)
  72 {
  73         if (!ao_adc_ready)
  74                 return;
  75         ao_adc_ready = 0;
  76         stm_adc.sr = 0;
  77         ao_dma_set_transfer(STM_DMA_INDEX(STM_DMA_CHANNEL_ADC1),
  78                             &stm_adc.dr,
  79                             (void *) (&ao_data_ring[ao_data_head].adc),
  80                             AO_NUM_ADC,
  81                             (0 << STM_DMA_CCR_MEM2MEM) |
  82                             (STM_DMA_CCR_PL_HIGH << STM_DMA_CCR_PL) |
  83                             (STM_DMA_CCR_MSIZE_16 << STM_DMA_CCR_MSIZE) |
  84                             (STM_DMA_CCR_PSIZE_16 << STM_DMA_CCR_PSIZE) |
  85                             (1 << STM_DMA_CCR_MINC) |
  86                             (0 << STM_DMA_CCR_PINC) |
  87                             (0 << STM_DMA_CCR_CIRC) |
  88                             (STM_DMA_CCR_DIR_PER_TO_MEM << STM_DMA_CCR_DIR));
  89         ao_dma_set_isr(STM_DMA_INDEX(STM_DMA_CHANNEL_ADC1), ao_adc_done);
  90         ao_dma_start(STM_DMA_INDEX(STM_DMA_CHANNEL_ADC1));
  91
  92         stm_adc.cr2 = AO_ADC_CR2_VAL | (1 << STM_ADC_CR2_SWSTART);
  93 }
  94
  95 /*
  96  * Fetch a copy of the most recent ADC data
  97  */
  98 void
  99 ao_adc_get(__xdata struct ao_adc *packet)
 100 {
 101 #if HAS_FLIGHT
 102         uint8_t i = ao_data_ring_prev(ao_sample_data);
 103 #else
 104         uint8_t i = ao_data_ring_prev(ao_data_head);
 105 #endif
 106         memcpy(packet, (void *) &ao_data_ring[i].adc, sizeof (struct ao_adc));
 107 }
 108
 109 #ifdef AO_ADC_SQ1_NAME
 110 static const char *ao_adc_name[AO_NUM_ADC] = {
 111         AO_ADC_SQ1_NAME,
 112 #ifdef AO_ADC_SQ2_NAME
 113         AO_ADC_SQ2_NAME,
 114 #endif
 115 #ifdef AO_ADC_SQ3_NAME
 116         AO_ADC_SQ3_NAME,
 117 #endif
 118 #ifdef AO_ADC_SQ4_NAME
 119         AO_ADC_SQ4_NAME,
 120 #endif
 121 #ifdef AO_ADC_SQ5_NAME
 122         AO_ADC_SQ5_NAME,
 123 #endif
 124 #ifdef AO_ADC_SQ6_NAME
 125         AO_ADC_SQ6_NAME,
 126 #endif
 127 #ifdef AO_ADC_SQ7_NAME
 128         AO_ADC_SQ7_NAME,
 129 #endif
 130 #ifdef AO_ADC_SQ8_NAME
 131         AO_ADC_SQ8_NAME,
 132 #endif
 133 #ifdef AO_ADC_SQ9_NAME
 134         AO_ADC_SQ9_NAME,
 135 #endif
 136 #ifdef AO_ADC_SQ10_NAME
 137         AO_ADC_SQ10_NAME,
 138 #endif
 139 #ifdef AO_ADC_SQ11_NAME
 140         AO_ADC_SQ11_NAME,
 141 #endif
 142 #ifdef AO_ADC_SQ12_NAME
 143         AO_ADC_SQ12_NAME,
 144 #endif
 145 #ifdef AO_ADC_SQ13_NAME
 146         AO_ADC_SQ13_NAME,
 147 #endif
 148 #ifdef AO_ADC_SQ14_NAME
 149         AO_ADC_SQ14_NAME,
 150 #endif
 151 #ifdef AO_ADC_SQ15_NAME
 152         AO_ADC_SQ15_NAME,
 153 #endif
 154 #ifdef AO_ADC_SQ16_NAME
 155         AO_ADC_SQ16_NAME,
 156 #endif
 157 #ifdef AO_ADC_SQ17_NAME
 158         AO_ADC_SQ17_NAME,
 159 #endif
 160 #ifdef AO_ADC_SQ18_NAME
 161         AO_ADC_SQ18_NAME,
 162 #endif
 163 #ifdef AO_ADC_SQ19_NAME
 164         AO_ADC_SQ19_NAME,
 165 #endif
 166 #ifdef AO_ADC_SQ20_NAME
 167         AO_ADC_SQ20_NAME,
 168 #endif
 169 #ifdef AO_ADC_SQ21_NAME
 170         #error "too many ADC names"
 171 #endif
 172 };
 173 #endif
 174
 175 static void
 176 ao_adc_dump(void) __reentrant
 177 {
 178         struct ao_data  packet;
 179 #ifndef AO_ADC_DUMP
 180         uint8_t i;
 181         int16_t *d;
 182 #endif
 183
 184         ao_data_get(&packet);
 185 #ifdef AO_ADC_DUMP
 186         AO_ADC_DUMP(&packet);
 187 #else
 188         printf("tick: %5u",  packet.tick);
 189         d = (int16_t *) (&packet.adc);
 190         for (i = 0; i < AO_NUM_ADC; i++) {
 191 #ifdef AO_ADC_SQ1_NAME
 192                 if (ao_adc_name[i])
 193                         printf ("\t%s: %5d\n", ao_adc_name[i], d[i]);
 194                 else
 195 #endif
 196                         printf (" %2d: %5d", i, d[i]);
 197         }
 198         printf("\n");
 199 #endif
 200 }
 201
 202 __code struct ao_cmds ao_adc_cmds[] = {
 203         { ao_adc_dump,  "a\0Display current ADC values" },
 204         { 0, NULL },
 205 };
 206
 207 void
 208 ao_adc_init(void)
 209 {
 210 #ifdef AO_ADC_PIN0_PORT
 211         stm_rcc.ahbenr |= AO_ADC_RCC_AHBENR;
 212 #endif
 213
 214 #ifdef AO_ADC_PIN0_PORT
 215         stm_moder_set(AO_ADC_PIN0_PORT, AO_ADC_PIN0_PIN, STM_MODER_ANALOG);
 216 #endif
 217 #ifdef AO_ADC_PIN1_PORT
 218         stm_moder_set(AO_ADC_PIN1_PORT, AO_ADC_PIN1_PIN, STM_MODER_ANALOG);
 219 #endif
 220 #ifdef AO_ADC_PIN2_PORT
 221         stm_moder_set(AO_ADC_PIN2_PORT, AO_ADC_PIN2_PIN, STM_MODER_ANALOG);
 222 #endif
 223 #ifdef AO_ADC_PIN3_PORT
 224         stm_moder_set(AO_ADC_PIN3_PORT, AO_ADC_PIN3_PIN, STM_MODER_ANALOG);
 225 #endif
 226 #ifdef AO_ADC_PIN4_PORT
 227         stm_moder_set(AO_ADC_PIN4_PORT, AO_ADC_PIN4_PIN, STM_MODER_ANALOG);
 228 #endif
 229 #ifdef AO_ADC_PIN5_PORT
 230         stm_moder_set(AO_ADC_PIN5_PORT, AO_ADC_PIN5_PIN, STM_MODER_ANALOG);
 231 #endif
 232 #ifdef AO_ADC_PIN6_PORT
 233         stm_moder_set(AO_ADC_PIN6_PORT, AO_ADC_PIN6_PIN, STM_MODER_ANALOG);
 234 #endif
 235 #ifdef AO_ADC_PIN7_PORT
 236         stm_moder_set(AO_ADC_PIN7_PORT, AO_ADC_PIN7_PIN, STM_MODER_ANALOG);
 237 #endif
 238 #ifdef AO_ADC_PIN8_PORT
 239         stm_moder_set(AO_ADC_PIN8_PORT, AO_ADC_PIN8_PIN, STM_MODER_ANALOG);
 240 #endif
 241 #ifdef AO_ADC_PIN9_PORT
 242         stm_moder_set(AO_ADC_PIN9_PORT, AO_ADC_PIN9_PIN, STM_MODER_ANALOG);
 243 #endif
 244 #ifdef AO_ADC_PIN10_PORT
 245         stm_moder_set(AO_ADC_PIN10_PORT, AO_ADC_PIN10_PIN, STM_MODER_ANALOG);
 246 #endif
 247 #ifdef AO_ADC_PIN11_PORT
 248         stm_moder_set(AO_ADC_PIN11_PORT, AO_ADC_PIN11_PIN, STM_MODER_ANALOG);
 249 #endif
 250 #ifdef AO_ADC_PIN12_PORT
 251         stm_moder_set(AO_ADC_PIN12_PORT, AO_ADC_PIN12_PIN, STM_MODER_ANALOG);
 252 #endif
 253 #ifdef AO_ADC_PIN13_PORT
 254         stm_moder_set(AO_ADC_PIN13_PORT, AO_ADC_PIN13_PIN, STM_MODER_ANALOG);
 255 #endif
 256 #ifdef AO_ADC_PIN14_PORT
 257         stm_moder_set(AO_ADC_PIN14_PORT, AO_ADC_PIN14_PIN, STM_MODER_ANALOG);
 258 #endif
 259 #ifdef AO_ADC_PIN15_PORT
 260         stm_moder_set(AO_ADC_PIN15_PORT, AO_ADC_PIN15_PIN, STM_MODER_ANALOG);
 261 #endif
 262 #ifdef AO_ADC_PIN16_PORT
 263         stm_moder_set(AO_ADC_PIN16_PORT, AO_ADC_PIN16_PIN, STM_MODER_ANALOG);
 264 #endif
 265 #ifdef AO_ADC_PIN17_PORT
 266         stm_moder_set(AO_ADC_PIN17_PORT, AO_ADC_PIN17_PIN, STM_MODER_ANALOG);
 267 #endif
 268 #ifdef AO_ADC_PIN18_PORT
 269         stm_moder_set(AO_ADC_PIN18_PORT, AO_ADC_PIN18_PIN, STM_MODER_ANALOG);
 270 #endif
 271 #ifdef AO_ADC_PIN19_PORT
 272         stm_moder_set(AO_ADC_PIN19_PORT, AO_ADC_PIN19_PIN, STM_MODER_ANALOG);
 273 #endif
 274 #ifdef AO_ADC_PIN20_PORT
 275         stm_moder_set(AO_ADC_PIN20_PORT, AO_ADC_PIN20_PIN, STM_MODER_ANALOG);
 276 #endif
 277 #ifdef AO_ADC_PIN21_PORT
 278         stm_moder_set(AO_ADC_PIN21_PORT, AO_ADC_PIN21_PIN, STM_MODER_ANALOG);
 279 #endif
 280 #ifdef AO_ADC_PIN22_PORT
 281         stm_moder_set(AO_ADC_PIN22_PORT, AO_ADC_PIN22_PIN, STM_MODER_ANALOG);
 282 #endif
 283 #ifdef AO_ADC_PIN23_PORT
 284         stm_moder_set(AO_ADC_PIN23_PORT, AO_ADC_PIN23_PIN, STM_MODER_ANALOG);
 285 #endif
 286 #ifdef AO_ADC_PIN24_PORT
 287         #error "Too many ADC ports"
 288 #endif
 289
 290         stm_rcc.apb2enr |= (1 << STM_RCC_APB2ENR_ADC1EN);
 291
 292         /* Turn off ADC during configuration */
 293         stm_adc.cr2 = 0;
 294
 295         stm_adc.cr1 = ((0 << STM_ADC_CR1_OVRIE ) |
 296                        (STM_ADC_CR1_RES_12 << STM_ADC_CR1_RES ) |
 297                        (0 << STM_ADC_CR1_AWDEN ) |
 298                        (0 << STM_ADC_CR1_JAWDEN ) |
 299                        (0 << STM_ADC_CR1_PDI ) |
 300                        (0 << STM_ADC_CR1_PDD ) |
 301                        (0 << STM_ADC_CR1_DISCNUM ) |
 302                        (0 << STM_ADC_CR1_JDISCEN ) |
 303                        (0 << STM_ADC_CR1_DISCEN ) |
 304                        (0 << STM_ADC_CR1_JAUTO ) |
 305                        (0 << STM_ADC_CR1_AWDSGL ) |
 306                        (1 << STM_ADC_CR1_SCAN ) |
 307                        (0 << STM_ADC_CR1_JEOCIE ) |
 308                        (0 << STM_ADC_CR1_AWDIE ) |
 309                        (0 << STM_ADC_CR1_EOCIE ) |
 310                        (0 << STM_ADC_CR1_AWDCH ));
 311
 312         /* 384 cycle sample time for everyone */
 313         stm_adc.smpr1 = 0x3ffff;
 314         stm_adc.smpr2 = 0x3fffffff;
 315         stm_adc.smpr3 = 0x3fffffff;
 316
 317         stm_adc.sqr1 = ((AO_NUM_ADC - 1) << 20);
 318         stm_adc.sqr2 = 0;
 319         stm_adc.sqr3 = 0;
 320         stm_adc.sqr4 = 0;
 321         stm_adc.sqr5 = 0;
 322 #if AO_NUM_ADC > 0
 323         stm_adc.sqr5 |= (AO_ADC_SQ1 << 0);
 324 #endif
 325 #if AO_NUM_ADC > 1
 326         stm_adc.sqr5 |= (AO_ADC_SQ2 << 5);
 327 #endif
 328 #if AO_NUM_ADC > 2
 329         stm_adc.sqr5 |= (AO_ADC_SQ3 << 10);
 330 #endif
 331 #if AO_NUM_ADC > 3
 332         stm_adc.sqr5 |= (AO_ADC_SQ4 << 15);
 333 #endif
 334 #if AO_NUM_ADC > 4
 335         stm_adc.sqr5 |= (AO_ADC_SQ5 << 20);
 336 #endif
 337 #if AO_NUM_ADC > 5
 338         stm_adc.sqr5 |= (AO_ADC_SQ6 << 25);
 339 #endif
 340 #if AO_NUM_ADC > 6
 341         stm_adc.sqr4 |= (AO_ADC_SQ7 << 0);
 342 #endif
 343 #if AO_NUM_ADC > 7
 344         stm_adc.sqr4 |= (AO_ADC_SQ8 << 5);
 345 #endif
 346 #if AO_NUM_ADC > 8
 347         stm_adc.sqr4 |= (AO_ADC_SQ9 << 10);
 348 #endif
 349 #if AO_NUM_ADC > 9
 350         stm_adc.sqr4 |= (AO_ADC_SQ10 << 15);
 351 #endif
 352 #if AO_NUM_ADC > 10
 353         stm_adc.sqr4 |= (AO_ADC_SQ11 << 20);
 354 #endif
 355 #if AO_NUM_ADC > 11
 356         stm_adc.sqr4 |= (AO_ADC_SQ12 << 25);
 357 #endif
 358 #if AO_NUM_ADC > 12
 359         stm_adc.sqr3 |= (AO_ADC_SQ13 << 0);
 360 #endif
 361 #if AO_NUM_ADC > 13
 362         stm_adc.sqr3 |= (AO_ADC_SQ14 << 5);
 363 #endif
 364 #if AO_NUM_ADC > 14
 365         stm_adc.sqr3 |= (AO_ADC_SQ15 << 10);
 366 #endif
 367 #if AO_NUM_ADC > 15
 368         stm_adc.sqr3 |= (AO_ADC_SQ16 << 15);
 369 #endif
 370 #if AO_NUM_ADC > 16
 371         stm_adc.sqr3 |= (AO_ADC_SQ17 << 20);
 372 #endif
 373 #if AO_NUM_ADC > 17
 374         stm_adc.sqr3 |= (AO_ADC_SQ18 << 25);
 375 #endif
 376 #if AO_NUM_ADC > 18
 377 #error "need to finish stm_adc.sqr settings"
 378 #endif
 379
 380         /* Turn ADC on */
 381         stm_adc.cr2 = AO_ADC_CR2_VAL;
 382
 383         /* Wait for ADC to be ready */
 384         while (!(stm_adc.sr & (1 << STM_ADC_SR_ADONS)))
 385                 ;
 386
 387 #ifndef HAS_ADC_TEMP
 388 #error Please define HAS_ADC_TEMP
 389 #endif
 390 #if HAS_ADC_TEMP
 391         stm_adc.ccr = ((1 << STM_ADC_CCR_TSVREFE));
 392 #else
 393         stm_adc.ccr = 0;
 394 #endif
 395         /* Clear any stale status bits */
 396         stm_adc.sr = 0;
 397
 398         ao_dma_alloc(STM_DMA_INDEX(STM_DMA_CHANNEL_ADC1));
 399
 400         ao_cmd_register(&ao_adc_cmds[0]);
 401
 402         ao_adc_ready = 1;
 403 }