pimoroni-pico/drivers/icp10125/icp10125.hpp

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1.8 KiB
C++
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#pragma once
#include <string>
#include "hardware/i2c.h"
#include "hardware/gpio.h"
#include "common/pimoroni_common.hpp"
#include "common/pimoroni_i2c.hpp"
namespace pimoroni {
class ICP10125 {
public:
enum meas_command {
NORMAL = 0x6825,
LOW_POWER = 0x609C,
LOW_NOISE = 0x70DF,
ULTRA_LOW_NOISE = 0x7866,
/*NORMAL_T_FIRST = 0x6825,
NORMAL_P_FIRST = 0x48A3,
LOW_POWER_T_FIRST = 0x609C,
LOW_POWER_P_FIRST = 0x401A,
LOW_NOISE_T_FIRST = 0x70DF,
LOW_NOISE_P_FIRST = 0x5059,
ULN_T_FIRST = 0x7866,
ULN_P_FIRST = 0x58E0*/
};
enum reading_status {
OK = 0,
CRC_FAIL = 1,
};
struct reading {
float temperature;
float pressure;
reading_status status;
};
static const uint8_t DEFAULT_I2C_ADDRESS = 0x63;
static const uint8_t CHIP_ID = 0x08;
ICP10125() : ICP10125(new I2C()) {};
ICP10125(I2C *i2c) : i2c(i2c) {}
bool init();
int chip_id();
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void reset();
reading measure(meas_command cmd=NORMAL);
private:
I2C *i2c;
int8_t address = DEFAULT_I2C_ADDRESS;
float sensor_constants[4];
const float p_Pa_calib[3] = {45000.0f, 80000.0f, 105000.0f};
const float LUT_lower = 3.5 * (1 << 20);
const float LUT_upper = 11.5 * (1 << 20);
const float quadr_factor = 1.0 / 16777216.0;
const float offst_factor = 2048.0;
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bool read_otp();
void process_data(const int p_LSB, const int T_LSB, float *pressure, float *temperature);
void calculate_conversion_constants(const float *p_Pa, const float *p_LUT, float *out);
uint8_t crc8(uint8_t *bytes, size_t length, uint8_t polynomial = 0x31);
};
}