src/main/drivers/adc.h

   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 #pragma once
  22
  23 #include <stdbool.h>
  24
  25 #include "drivers/io_types.h"
  26 #include "drivers/time.h"
  27
  28 #ifndef ADC_INSTANCE
  29 #define ADC_INSTANCE                ADC1
  30 #endif
  31
  32 #if defined(STM32F4) || defined(STM32F7)
  33 #ifndef ADC1_DMA_STREAM
  34 #define ADC1_DMA_STREAM DMA2_Stream4 // ST0 or ST4
  35 #endif
  36
  37 #ifndef ADC2_DMA_STREAM
  38 #define ADC2_DMA_STREAM DMA2_Stream3 // ST2 or ST3
  39 #endif
  40
  41 #ifndef ADC3_DMA_STREAM
  42 #define ADC3_DMA_STREAM DMA2_Stream0 // ST0 or ST1
  43 #endif
  44 #endif
  45
  46 typedef enum ADCDevice {
  47     ADCINVALID = -1,
  48     ADCDEV_1   = 0,
  49 #if defined(ADC2)
  50     ADCDEV_2,
  51 #endif
  52 #if defined(ADC3)
  53     ADCDEV_3,
  54 #endif
  55 #if defined(ADC4)
  56     ADCDEV_4,
  57 #endif
  58 #if defined(ADC5)
  59     ADCDEV_5,
  60 #endif
  61     ADCDEV_COUNT
  62 } ADCDevice;
  63
  64 #define ADC_CFG_TO_DEV(x) ((x) - 1)
  65 #define ADC_DEV_TO_CFG(x) ((x) + 1)
  66
  67 typedef enum {
  68     ADC_BATTERY = 0,
  69     ADC_CURRENT = 1,
  70     ADC_EXTERNAL1 = 2,
  71     ADC_RSSI = 3,
  72 #if defined(STM32H7) || defined(STM32G4)
  73     // On H7 and G4, internal sensors are treated in the similar fashion as regular ADC inputs
  74     ADC_CHANNEL_INTERNAL = 4,
  75     ADC_TEMPSENSOR = 4,
  76     ADC_VREFINT = 5,
  77 #endif
  78     ADC_CHANNEL_COUNT
  79 } AdcChannel;
  80
  81 typedef struct adcOperatingConfig_s {
  82     ioTag_t tag;
  83 #if defined(STM32H7) || defined(STM32G4)
  84     ADCDevice adcDevice;        // ADCDEV_x for this input
  85     uint32_t adcChannel;        // Channel number for this input. Note that H7 and G4 HAL requires this to be 32-bit encoded number.
  86 #else
  87     uint8_t adcChannel;         // ADCy_INxx channel number for this input (XXX May be consolidated with uint32_t case)
  88 #endif
  89     uint8_t dmaIndex;           // index into DMA buffer in case of sparse channels
  90     bool enabled;
  91     uint8_t sampleTime;
  92 } adcOperatingConfig_t;
  93
  94 struct adcConfig_s;
  95 void adcInit(const struct adcConfig_s *config);
  96 uint16_t adcGetChannel(uint8_t channel);
  97
  98 #ifdef USE_ADC_INTERNAL
  99 bool adcInternalIsBusy(void);
 100 void adcInternalStartConversion(void);
 101 uint16_t adcInternalReadVrefint(void);
 102 uint16_t adcInternalReadTempsensor(void);
 103 uint16_t adcInternalCompensateVref(uint16_t vrefAdcValue);
 104 int16_t adcInternalComputeTemperature(uint16_t tempAdcValue, uint16_t vrefValue);
 105 #endif
 106
 107 #if !defined(SIMULATOR_BUILD)
 108 ADCDevice adcDeviceByInstance(ADC_TypeDef *instance);
 109 #endif