src/main/drivers/barometer/barometer_bmp280.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 #define BMP280_DEFAULT_CHIP_ID               (0x58)
  21 #define BME280_DEFAULT_CHIP_ID               (0x60)
  22
  23 #define BMP280_CHIP_ID_REG                   (0xD0)  /* Chip ID Register */
  24 #define BMP280_RST_REG                       (0xE0)  /* Softreset Register */
  25 #define BMP280_STAT_REG                      (0xF3)  /* Status Register */
  26 #define BMP280_CTRL_MEAS_REG                 (0xF4)  /* Ctrl Measure Register */
  27 #define BMP280_CONFIG_REG                    (0xF5)  /* Configuration Register */
  28 #define BMP280_PRESSURE_MSB_REG              (0xF7)  /* Pressure MSB Register */
  29 #define BMP280_PRESSURE_LSB_REG              (0xF8)  /* Pressure LSB Register */
  30 #define BMP280_PRESSURE_XLSB_REG             (0xF9)  /* Pressure XLSB Register */
  31 #define BMP280_TEMPERATURE_MSB_REG           (0xFA)  /* Temperature MSB Reg */
  32 #define BMP280_TEMPERATURE_LSB_REG           (0xFB)  /* Temperature LSB Reg */
  33 #define BMP280_TEMPERATURE_XLSB_REG          (0xFC)  /* Temperature XLSB Reg */
  34 #define BMP280_FORCED_MODE                   (0x01)
  35
  36 #define BMP280_TEMPERATURE_CALIB_DIG_T1_LSB_REG             (0x88)
  37 #define BMP280_PRESSURE_TEMPERATURE_CALIB_DATA_LENGTH       (24)
  38 #define BMP280_DATA_FRAME_SIZE               (6)
  39
  40 #define BMP280_OVERSAMP_SKIPPED          (0x00)
  41 #define BMP280_OVERSAMP_1X               (0x01)
  42 #define BMP280_OVERSAMP_2X               (0x02)
  43 #define BMP280_OVERSAMP_4X               (0x03)
  44 #define BMP280_OVERSAMP_8X               (0x04)
  45 #define BMP280_OVERSAMP_16X              (0x05)
  46
  47 #define BMP280_FILTER_COEFF_OFF               (0x00)
  48 #define BMP280_FILTER_COEFF_2                 (0x01)
  49 #define BMP280_FILTER_COEFF_4                 (0x02)
  50 #define BMP280_FILTER_COEFF_8                 (0x03)
  51 #define BMP280_FILTER_COEFF_16                (0x04)
  52
  53
  54 // configure pressure and temperature oversampling, forced sampling mode
  55 #define BMP280_PRESSURE_OSR              (BMP280_OVERSAMP_8X)
  56 #define BMP280_TEMPERATURE_OSR           (BMP280_OVERSAMP_1X)
  57 #define BMP280_MODE                      (BMP280_PRESSURE_OSR << 2 | BMP280_TEMPERATURE_OSR << 5 | BMP280_FORCED_MODE)
  58
  59 //configure IIR pressure filter
  60 #define BMP280_FILTER                    (BMP280_FILTER_COEFF_8 << 2)
  61
  62 #define T_INIT_MAX                       (20)
  63 // 20/16 = 1.25 ms
  64 #define T_MEASURE_PER_OSRS_MAX           (37)
  65 // 37/16 = 2.3125 ms
  66 #define T_SETUP_PRESSURE_MAX             (10)
  67 // 10/16 = 0.625 ms
  68
  69 bool bmp280Detect(baroDev_t *baro);
  70