src/main/sensors/pitotmeter.h

   1 /*
   2  * This file is part of Cleanflight.
   3  *
   4  * Cleanflight 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, either version 3 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * Cleanflight is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with Cleanflight.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #pragma once
  19
  20 #include "config/parameter_group.h"
  21 #include "common/filter.h"
  22 #include "common/calibration.h"
  23
  24 #include "drivers/pitotmeter/pitotmeter.h"
  25
  26 typedef enum {
  27     PITOT_NONE = 0,
  28     PITOT_AUTODETECT = 1,
  29     PITOT_MS4525 = 2,
  30     PITOT_ADC = 3,
  31     PITOT_VIRTUAL = 4,
  32     PITOT_FAKE = 5,
  33     PITOT_MSP = 6,
  34 } pitotSensor_e;
  35
  36 #define PITOT_MAX  PITOT_FAKE
  37 #define PITOT_SAMPLE_COUNT_MAX   48
  38
  39 typedef struct pitotmeterConfig_s {
  40     uint8_t pitot_hardware;                 // Pitotmeter hardware to use
  41     uint16_t pitot_lpf_milli_hz;            // additional LPF to reduce pitot noise in [0.001Hz]
  42     float pitot_scale;                      // scale value
  43 } pitotmeterConfig_t;
  44
  45 PG_DECLARE(pitotmeterConfig_t, pitotmeterConfig);
  46
  47 typedef struct pito_s {
  48     pitotDev_t dev;
  49     float airSpeed;
  50
  51     zeroCalibrationScalar_t zeroCalibration;
  52     pt1Filter_t lpfState;
  53     timeUs_t lastMeasurementUs;
  54     timeMs_t lastSeenHealthyMs;
  55
  56     float pressureZero;
  57     float pressure;
  58 } pitot_t;
  59
  60 #ifdef USE_PITOT
  61
  62 #define AIR_DENSITY_SEA_LEVEL_15C   1.225f      // Air density at sea level and 15 degrees Celsius
  63 #define P0                          101325.0f   // standard pressure [Pa]
  64
  65 extern pitot_t pitot;
  66
  67 bool pitotInit(void);
  68 bool pitotIsCalibrationComplete(void);
  69 void pitotStartCalibration(void);
  70 void pitotUpdate(void);
  71 int32_t pitotCalculateAirSpeed(void);
  72 bool pitotIsHealthy(void);
  73
  74 #endif