pim/mgos_i2c_mock
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Add partial BMP280/BME280 driver

Browse Source
This commit is contained in:
Pim van Pelt
2018-04-22 09:37:45 +02:00
parent b9bb70d4cf
commit 0f933dda31
2 changed files with 151 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

65
src/mgos_barometer_bme280.h
View File

@ -3,8 +3,71 @@
#include "mgos.h"
#include "mgos_barometer_internal.h"
// DevID: 0x56/0x57 are samples of BMP280; 0x58 is mass production BMP280; 0x60 is BME280
#define BME280_REG_DEVID (0xD0) /* Chip ID Register */
#define BME280_REG_RESET (0xE0) /* Softreset Register */
#define BME280_REG_STATUS (0xF3) /* Status Register */
#define BME280_REG_CTRL_MEAS (0xF4) /* Ctrl Measure Register */
#define BME280_REG_CONFIG (0xF5) /* Configuration Register */
#define BME280_REG_PRESSURE_MSB (0xF7) /* Pressure MSB Register */
#define BME280_REG_PRESSURE_LSB (0xF8) /* Pressure LSB Register */
#define BME280_REG_PRESSURE_XLSB (0xF9) /* Pressure XLSB Register */
#define BME280_REG_TEMPERATURE_MSB (0xFA) /* Temperature MSB Reg */
#define BME280_REG_TEMPERATURE_LSB (0xFB) /* Temperature LSB Reg */
#define BME280_REG_TEMPERATURE_XLSB (0xFC) /* Temperature XLSB Reg */
#define BME280_REG_HUMIDITY_MSB (0xFD) /* Humidity MSB Reg (BME280 only)*/
#define BME280_REG_HUMIDITY_LSB (0xFE) /* Humidity LSB Reg (BME280 only)*/
#define BME280_MODE_SLEEP (0x00)
#define BME280_MODE_FORCED (0x01)
#define BME280_MODE_NORMAL (0x03)
#define BME280_REG_TEMPERATURE_CALIB_DIG_T1_LSB (0x88)
#define BME280_OVERSAMP_NONE (0x00)
#define BME280_OVERSAMP_1X (0x01)
#define BME280_OVERSAMP_2X (0x02)
#define BME280_OVERSAMP_4X (0x03)
#define BME280_OVERSAMP_8X (0x04)
#define BME280_OVERSAMP_16X (0x05)
#define BME280_STANDBY_500us (0x00)
#define BME280_STANDBY_62ms (0x01)
#define BME280_STANDBY_125ms (0x02)
#define BME280_STANDBY_250ms (0x03)
#define BME280_STANDBY_500ms (0x04)
#define BME280_STANDBY_1000ms (0x05)
// Note: Datasheet defines 110 == 10ms, 111 == 20ms, but BME280 and BMP280
// implement this differently.
struct mgos_barometer_bme280_calib_data {
// Calibration data:
uint16_t dig_T1;
int16_t dig_T2;
int16_t dig_T3;
uint16_t dig_P1;
int16_t dig_P2;
int16_t dig_P3;
int16_t dig_P4;
int16_t dig_P5;
int16_t dig_P6;
int16_t dig_P7;
int16_t dig_P8;
int16_t dig_P9;
// Additional calibration data for BME280
uint8_t dig_H1;
int16_t dig_H2;
uint8_t dig_H3;
int16_t dig_H4; // Note: this is 0xE4 / 0xE5[3:0]
int16_t dig_H5; // Note: this is 0xE5[7:4] / 0xE6
int8_t dig_H6;
};
struct mgos_barometer_bme280_data {
float a0, b1, b2, c12;
struct mgos_barometer_bme280_calib_data calib;
float humidity;
};
bool mgos_barometer_bme280_detect(struct mgos_barometer *dev);