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Added and integrated bmp280 temperature sensor

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This commit is contained in:
Matthias
2024-03-24 16:30:26 +01:00
parent 9f63477aa3
commit e7dd0ea1f6
7 changed files with 188 additions and 80 deletions
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code/main/old/inc/bmp280.h
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// --------------------------------------------------------------------------------------------------------------------
/// \file bme280.h
/// \brief File description
// --------------------------------------------------------------------------------------------------------------------
//
// vbchaos software design
//
// --------------------------------------------------------------------------------------------------------------------
/// $Revision: $
/// $Author: $
/// $Date: $
// (c) 2023 vbchaos
// --------------------------------------------------------------------------------------------------------------------
#ifndef MAIN_INC_BMP280_H_
#define MAIN_INC_BMP280_H_
/**
* bme280 implementation
* \defgroup bme280
* \brief {group_description}
* \addtogroup {Layer}
*
* Detailed description
* @{
*/
// --------------------------------------------------------------------------------------------------------------------
// Include files
// --------------------------------------------------------------------------------------------------------------------
// CompilerIncludes
// All include files that are provided by the compiler directly
// ProjectIncludes
// All include files that are provided by the project
#include "i2c.h"
// --------------------------------------------------------------------------------------------------------------------
// Constant and macro definitions
// --------------------------------------------------------------------------------------------------------------------
#define BMP280_DEVICE_ID ((uint8_t)0x58)
#define BMP280_RESET_VALUE ((uint8_t)0xB6)
// --------------------------------------------------------------------------------------------------------------------
// Type definitions.
// --------------------------------------------------------------------------------------------------------------------
// --------------------------------------------------------------------------------------------------------------------
// Function declarations
// --------------------------------------------------------------------------------------------------------------------
class BMP280
{
public:
BMP280(I2C* bus, uint8_t slaveAddress);
typedef enum
{
STANDBY = 0,
FORCED = 1,
NORMAL = 3
} BMP280_Mode_t;
typedef enum
{
SKIPPED = 0,
X1 = 1,
X2 = 2,
X4 = 3,
X8 = 4,
X16 = 5
} BMP280_Oversampling_t;
void resetSensor(void);
bool initialize(void);
bool setSensorMode(BMP280_Mode_t mode);
bool setSensorTemperatureOversampling(BMP280_Oversampling_t oversampling);
int getTemperature(void);
private:
struct CompensationParameters
{
// Temperature compensation parameters
uint16_t dig_T1;
int16_t dig_T2;
int16_t dig_T3;
// Pressure compensation parameters
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;
} compensationParameters;
struct memorymap
{
struct
{
uint8_t msb;
uint8_t lsb;
uint8_t xlsb;
} temperature_raw;
struct
{
uint8_t msb;
uint8_t lsb;
uint8_t xlsb;
} pressure_raw;
struct
{
uint8_t t_sb: 3;
uint8_t filter: 3;
uint8_t unused: 1;
uint8_t spi3w_en: 1;
} config;
struct
{
uint8_t mode : 2;
uint8_t oversampling_pressure : 3;
uint8_t oversampling_temp : 3;
} ctrl_meas;
uint8_t status;
uint8_t reset;
uint8_t id;
} memorymap;
int t_fine;
int temperature;
I2C* bus;
uint8_t slaveAddress;
BMP280_Mode_t mode;
void resetDriver(void);
// Communication with Device
void resetDevice(void);
void getDeviceID(void);
void setSensorControlMeasurement(void);
void setSensorConfiguration(void);
void getCompensationValues(void);
void compensateTemperature(void);
void getPreasureValues(void);
void getTemperatureValues(void);
};
/** @} */
#endif /* MAIN_INC_BMP280_H_ */
code/main/old/src/bmp280.cpp
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// --------------------------------------------------------------------------------------------------------------------
/// \file bme280.cpp
/// \brief Description
// --------------------------------------------------------------------------------------------------------------------
//
// vbchaos software design
//
// --------------------------------------------------------------------------------------------------------------------
/// $Revision: $
/// $Author: $
/// $Date: $
// (c) 2023 vbchaos
// --------------------------------------------------------------------------------------------------------------------
// --------------------------------------------------------------------------------------------------------------------
// Include files
// --------------------------------------------------------------------------------------------------------------------
#include <bmp280.h>
#include "logger.h"
// --------------------------------------------------------------------------------------------------------------------
// Constant and macro definitions
// --------------------------------------------------------------------------------------------------------------------
// List of registers
#define ADDRESS_COMP_PARAMETERS ((uint32_t)0x88)
#define ADDRESS_REG_ID ((uint32_t)0xD0)
#define ADDRESS_REG_RESET ((uint32_t)0xE0)
#define ADDRESS_REG_STATUS ((uint32_t)0xF3)
#define ADDRESS_REG_CTRL_MEAS ((uint32_t)0xF4)
#define ADDRESS_REG_CONFIG ((uint32_t)0xF5)
#define ADDRESS_REG_PRESSURE_MSB ((uint32_t)0xF7)
#define ADDRESS_REG_PRESSURE_LSB ((uint32_t)0xF8)
#define ADDRESS_REG_PRESSURE_XLSB ((uint32_t)0xF9)
#define ADDRESS_REG_TEMPERATURE_MSB ((uint32_t)0xFA)
#define ADDRESS_REG_TEMPERATURE_LSB ((uint32_t)0xFB)
#define ADDRESS_REG_TEMPERATURE_XLSB ((uint32_t)0xFC)
// --------------------------------------------------------------------------------------------------------------------
// Type definitions
// --------------------------------------------------------------------------------------------------------------------
// --------------------------------------------------------------------------------------------------------------------
// File-scope variables
// --------------------------------------------------------------------------------------------------------------------
// --------------------------------------------------------------------------------------------------------------------
// Function declarations
// --------------------------------------------------------------------------------------------------------------------
// --------------------------------------------------------------------------------------------------------------------
// Function definitions
// --------------------------------------------------------------------------------------------------------------------
BMP280::BMP280(I2C* bus, uint8_t slaveAddress)
{
// Take over the bus
BMP280::bus = bus;
// Take over the device slave address
BMP280::slaveAddress = slaveAddress;
// Reset the driver itself
resetDriver();
// Reset the device
}
void BMP280::resetSensor(void)
{
resetDevice();
}
bool BMP280::initialize(void)
{
bool returnValue = true;
// First read the device ID
getDeviceID();
// Device ID must match, otherwise there is a component error
if (memorymap.id != BMP280_DEVICE_ID)
{
returnValue = false;
}
if (returnValue)
{
// Get the compensation values from the device
getCompensationValues();
}
return returnValue;
}
bool BMP280::setSensorMode(BMP280_Mode_t mode)
{
bool returnValue = true;
memorymap.ctrl_meas.mode = mode;
setSensorControlMeasurement();
return returnValue;
}
bool BMP280::setSensorTemperatureOversampling(BMP280_Oversampling_t oversampling)
{
bool returnValue = true;
memorymap.ctrl_meas.oversampling_temp = oversampling;
setSensorControlMeasurement();
return returnValue;
}
int BMP280::getTemperature(void)
{
// Get latest raw values from device
BMP280::getTemperatureValues();
// Calculate temperature
BMP280::compensateTemperature();
// return the value
return temperature;
}
void BMP280::resetDriver(void)
{
// Reset the parameters
BMP280::compensationParameters = {};
// Reset the device memory map
BMP280::memorymap = {};
// Reset the mode
BMP280::mode = STANDBY;
// Reset calculation values
t_fine = 0;
temperature = 0;
}
void BMP280::getDeviceID(void)
{
bus->read_register(slaveAddress, ADDRESS_REG_ID, &memorymap.id, 1);
}
void BMP280::resetDevice(void)
{
uint8_t resetValue = BMP280_RESET_VALUE;
bus->write_register(slaveAddress, ADDRESS_REG_RESET, &resetValue, 1);
}
void BMP280::setSensorControlMeasurement(void)
{
bus->write_register(slaveAddress, ADDRESS_REG_CTRL_MEAS, (uint8_t*)&memorymap.ctrl_meas, 1);
}
void BMP280::setSensorConfiguration(void)
{
bus->write_register(slaveAddress, ADDRESS_REG_CONFIG, (uint8_t*)&memorymap.config, 1);
}
void BMP280::getCompensationValues(void)
{
bus->read_register(slaveAddress, ADDRESS_COMP_PARAMETERS, (uint8_t*)&compensationParameters, sizeof(compensationParameters));
LOGGER_DEBUG("Got compensation values: %04X %04X %04X", compensationParameters.dig_T1, compensationParameters.dig_T2, compensationParameters.dig_T3);
}
void BMP280::getPreasureValues(void)
{
bus->read_register(slaveAddress, ADDRESS_REG_PRESSURE_LSB, (uint8_t*)&memorymap.pressure_raw, sizeof(memorymap.pressure_raw));
}
void BMP280::getTemperatureValues(void)
{
bus->read_register(slaveAddress, ADDRESS_REG_TEMPERATURE_MSB, (uint8_t*)&memorymap.temperature_raw, sizeof(memorymap.temperature_raw));
}
void BMP280::compensateTemperature(void)
{
int adc_T = 0;
// Create a single temperature value from the individual memory entries
adc_T |= memorymap.temperature_raw.msb << 12;
adc_T |= memorymap.temperature_raw.lsb << 4;
// XLSB is only a nibble
adc_T |= memorymap.temperature_raw.xlsb >> 4;
int var1 = ((((adc_T >> 3) - ((int)compensationParameters.dig_T1<<1))) * ((int)compensationParameters.dig_T2)) >> 11;
int var2 = (((((adc_T>>4) - ((int)compensationParameters.dig_T1)) * ((adc_T>>4) - ((int)compensationParameters.dig_T1))) >> 12) * ((int)compensationParameters.dig_T3)) >> 14;
t_fine = var1 + var2;
temperature = (t_fine * 5 + 128) >> 8;
}