altb_pmic / HP206C

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Dependents:   Grove-Barometric_Pressure_Sensor_Example

HP206C.h@4:a2b79f08ad14, 2019-06-25 (annotated)

Committer:
pmic
Date:
Tue Jun 25 14:20:18 2019 +0000
Revision:
4:a2b79f08ad14
Parent:
3:dd1c93488020
Child:
6:470f31efa042
enhance more stuff

Who changed what in which revision?

UserRevisionLine numberNew contents of line
pmic 4:a2b79f08ad14 1 // source: https://os.mbed.com/users/ElectronicsSanta/code/HP206C_barometer/file/0a071ea90726/main.cpp/
pmic 4:a2b79f08ad14 2
pmic 1:c5247b2ef5af 3 #ifndef _HP206C
pmic 1:c5247b2ef5af 4 #define _HP206C
pmic 1:c5247b2ef5af 5
pmic 1:c5247b2ef5af 6 #include "mbed.h"
pmic 1:c5247b2ef5af 7
pmic 1:c5247b2ef5af 8 #define I2C_BAROMETER_ADDRESS 0x76 << 1 // 0xEC, device adress
pmic 1:c5247b2ef5af 9
pmic 1:c5247b2ef5af 10 #define HP20X_SOFT_RST 0x06 // for initializing, takes longer than next
pmic 1:c5247b2ef5af 11 #define HP20X_ANA_CAL 0x28 // recalibrate analog internal circuitries, for unstable environment
pmic 1:c5247b2ef5af 12
pmic 1:c5247b2ef5af 13 #define HP20X_WR_CONVERT_CMD 0x40
pmic 1:c5247b2ef5af 14
pmic 1:c5247b2ef5af 15 #define HP20X_READ_PT 0x10 // read pressure and altitude command
pmic 1:c5247b2ef5af 16 #define HP20X_READ_A 0x31 // read altitude command
pmic 1:c5247b2ef5af 17
pmic 1:c5247b2ef5af 18 #define HP20X_WR_REG_MODE 0xC0
pmic 1:c5247b2ef5af 19 #define HP20X_RD_REG_MODE 0x80
pmic 1:c5247b2ef5af 20
pmic 1:c5247b2ef5af 21 #define HP20X_OK_DEV 0X80 // successfully initialized
pmic 1:c5247b2ef5af 22 #define HP20X_REG_PARA 0X0F // status register
pmic 1:c5247b2ef5af 23
pmic 1:c5247b2ef5af 24 #define HP20X_CONVERT_OSR4096 0 << 2
pmic 1:c5247b2ef5af 25 #define HP20X_CONVERT_OSR2048 1 << 2
pmic 1:c5247b2ef5af 26 #define HP20X_CONVERT_OSR1024 2 << 2
pmic 1:c5247b2ef5af 27 #define HP20X_CONVERT_OSR512 3 << 2
pmic 1:c5247b2ef5af 28 #define HP20X_CONVERT_OSR256 4 << 2
pmic 1:c5247b2ef5af 29 #define HP20X_CONVERT_OSR128 5 << 2
pmic 4:a2b79f08ad14 30 /*
pmic 4:a2b79f08ad14 31 ADC is parametrizised through OSR_CFG
pmic 4:a2b79f08ad14 32 HP20X_CONVERT_OSR128 -> OSR_ConvertTime = 5; // 4.1 ms -> ~200 Hz
pmic 4:a2b79f08ad14 33 HP20X_CONVERT_OSR256 -> OSR_ConvertTime = 9; // 8.2 ms -> ~100 Hz
pmic 4:a2b79f08ad14 34 HP20X_CONVERT_OSR512 -> OSR_ConvertTime = 17; // 16.4 ms -> ~ 50 Hz
pmic 4:a2b79f08ad14 35 HP20X_CONVERT_OSR1024 -> OSR_ConvertTime = 34; // 32.8 ms -> ~ 20 Hz
pmic 4:a2b79f08ad14 36 HP20X_CONVERT_OSR2048 -> OSR_ConvertTime = 67; // 65.6 ms -> ~ 10 Hz
pmic 4:a2b79f08ad14 37 HP20X_CONVERT_OSR4096 -> OSR_ConvertTime = 132; // 131.1 ms -> ~ 5 Hz
pmic 4:a2b79f08ad14 38 */
pmic 4:a2b79f08ad14 39 #define OSR_CFG HP20X_CONVERT_OSR1024
pmic 1:c5247b2ef5af 40
pmic 1:c5247b2ef5af 41 class HP206C
pmic 1:c5247b2ef5af 42 {
pmic 1:c5247b2ef5af 43 public:
pmic 1:c5247b2ef5af 44
pmic 1:c5247b2ef5af 45 HP206C(PinName p_sda, PinName p_scl);
pmic 3:dd1c93488020 46
pmic 3:dd1c93488020 47 float operator()() {
pmic 3:dd1c93488020 48 return readAltitude();
pmic 1:c5247b2ef5af 49 }
pmic 3:dd1c93488020 50
pmic 1:c5247b2ef5af 51 virtual ~HP206C();
pmic 1:c5247b2ef5af 52
pmic 1:c5247b2ef5af 53 void reset();
pmic 3:dd1c93488020 54 float readAltitude();
pmic 1:c5247b2ef5af 55
pmic 1:c5247b2ef5af 56 private:
pmic 1:c5247b2ef5af 57
pmic 1:c5247b2ef5af 58 I2C i2c;
pmic 1:c5247b2ef5af 59
pmic 4:a2b79f08ad14 60 float altitude;
pmic 4:a2b79f08ad14 61 bool baro_found;
pmic 4:a2b79f08ad14 62 uint8_t OSR_ConvertTime;
pmic 1:c5247b2ef5af 63
pmic 4:a2b79f08ad14 64 void setConversionTime();
pmic 1:c5247b2ef5af 65 unsigned char readRegister(unsigned char reg);
pmic 1:c5247b2ef5af 66 void writeRegister(unsigned char reg, unsigned char data);
pmic 1:c5247b2ef5af 67 void enableCompensation();
pmic 1:c5247b2ef5af 68 void disableCompensation();
pmic 1:c5247b2ef5af 69 void softReset();
pmic 1:c5247b2ef5af 70 void recalibrate();
pmic 1:c5247b2ef5af 71 uint32_t readData3Bytes();
pmic 3:dd1c93488020 72 void readTemperatureAndPressure();
pmic 3:dd1c93488020 73 void updateAltitude();
pmic 1:c5247b2ef5af 74
pmic 1:c5247b2ef5af 75 };
pmic 1:c5247b2ef5af 76
pmic 1:c5247b2ef5af 77 #endif