src/main/drivers/adc.c

   1 /*
   2  * This file is part of Cleanflight and Betaflight.
   3  *
   4  * Cleanflight and Betaflight are free software. You can redistribute
   5  * this software and/or modify this software under the terms of the
   6  * GNU General Public License as published by the Free Software
   7  * Foundation, either version 3 of the License, or (at your option)
   8  * any later version.
   9  *
  10  * Cleanflight and Betaflight are distributed in the hope that they
  11  * will be useful, but WITHOUT ANY WARRANTY; without even the implied
  12  * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  13  * See the GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this software.
  17  *
  18  * If not, see <http://www.gnu.org/licenses/>.
  19  */
  20
  21 #include <stdbool.h>
  22 #include <stdint.h>
  23
  24 #include "platform.h"
  25 #include "common/utils.h"
  26
  27 #ifdef USE_ADC
  28
  29 #include "build/build_config.h"
  30 #include "build/debug.h"
  31
  32 #include "drivers/adc_impl.h"
  33 #include "drivers/io.h"
  34
  35 #include "pg/adc.h"
  36
  37 #include "adc.h"
  38
  39 //#define DEBUG_ADC_CHANNELS
  40
  41 adcOperatingConfig_t adcOperatingConfig[ADC_CHANNEL_COUNT];
  42 volatile uint16_t adcValues[ADC_CHANNEL_COUNT];
  43
  44 #ifdef USE_ADC_INTERNAL
  45 uint16_t adcTSCAL1;
  46 uint16_t adcTSCAL2;
  47 uint16_t adcTSSlopeK;
  48 uint16_t adcVREFINTCAL;
  49 #endif
  50
  51 uint8_t adcChannelByTag(ioTag_t ioTag)
  52 {
  53     for (uint8_t i = 0; i < ARRAYLEN(adcTagMap); i++) {
  54         if (ioTag == adcTagMap[i].tag)
  55             return adcTagMap[i].channel;
  56     }
  57     return 0;
  58 }
  59
  60 ADCDevice adcDeviceByInstance(ADC_TypeDef *instance)
  61 {
  62     if (instance == ADC1) {
  63         return ADCDEV_1;
  64     }
  65
  66 #if defined(STM32F3) || defined(STM32F4) || defined(STM32F7)
  67     if (instance == ADC2) {
  68         return ADCDEV_2;
  69     }
  70
  71     if (instance == ADC3) {
  72         return ADCDEV_3;
  73     }
  74 #endif
  75
  76 #ifdef STM32F3
  77     if (instance == ADC4) {
  78         return ADCDEV_4;
  79     }
  80 #endif
  81
  82     return ADCINVALID;
  83 }
  84
  85 uint16_t adcGetChannel(uint8_t channel)
  86 {
  87 #ifdef DEBUG_ADC_CHANNELS
  88     if (adcOperatingConfig[0].enabled) {
  89         debug[0] = adcValues[adcOperatingConfig[0].dmaIndex];
  90     }
  91     if (adcOperatingConfig[1].enabled) {
  92         debug[1] = adcValues[adcOperatingConfig[1].dmaIndex];
  93     }
  94     if (adcOperatingConfig[2].enabled) {
  95         debug[2] = adcValues[adcOperatingConfig[2].dmaIndex];
  96     }
  97     if (adcOperatingConfig[3].enabled) {
  98         debug[3] = adcValues[adcOperatingConfig[3].dmaIndex];
  99     }
 100 #endif
 101     return adcValues[adcOperatingConfig[channel].dmaIndex];
 102 }
 103
 104 // Verify a pin designated by tag has connection to an ADC instance designated by device
 105
 106 bool adcVerifyPin(ioTag_t tag, ADCDevice device)
 107 {
 108     if (!tag) {
 109         return false;
 110     }
 111
 112     for (int map = 0 ; map < ADC_TAG_MAP_COUNT ; map++) {
 113 #if defined(STM32F1)
 114         UNUSED(device);
 115         if ((adcTagMap[map].tag == tag)) {
 116             return true;
 117         }
 118 #else
 119         if ((adcTagMap[map].tag == tag) && (adcTagMap[map].devices & (1 << device))) {
 120             return true;
 121         }
 122 #endif
 123     }
 124
 125     return false;
 126 }
 127
 128 #else
 129 uint16_t adcGetChannel(uint8_t channel)
 130 {
 131     UNUSED(channel);
 132     return 0;
 133 }
 134 #endif