2021-07-22 17:36:33 +00:00
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#pragma once
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#include <string>
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#include "hardware/i2c.h"
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#include "hardware/gpio.h"
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#include "common/pimoroni_common.hpp"
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#include "common/pimoroni_i2c.hpp"
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namespace pimoroni {
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class ICP10125 {
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public:
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enum meas_command {
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NORMAL = 0x6825,
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LOW_POWER = 0x609C,
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LOW_NOISE = 0x70DF,
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ULTRA_LOW_NOISE = 0x7866,
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/*NORMAL_T_FIRST = 0x6825,
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NORMAL_P_FIRST = 0x48A3,
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LOW_POWER_T_FIRST = 0x609C,
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LOW_POWER_P_FIRST = 0x401A,
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LOW_NOISE_T_FIRST = 0x70DF,
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LOW_NOISE_P_FIRST = 0x5059,
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ULN_T_FIRST = 0x7866,
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ULN_P_FIRST = 0x58E0*/
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};
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enum reading_status {
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OK = 0,
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CRC_FAIL = 1,
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};
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struct reading {
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float temperature;
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float pressure;
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reading_status status;
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};
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static const uint8_t DEFAULT_I2C_ADDRESS = 0x63;
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static const uint8_t CHIP_ID = 0x08;
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ICP10125() : ICP10125(new I2C()) {};
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ICP10125(I2C *i2c) : i2c(i2c) {}
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bool init();
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int chip_id();
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2021-07-23 11:18:17 +00:00
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void reset();
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2021-07-22 17:36:33 +00:00
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reading measure(meas_command cmd=NORMAL);
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private:
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I2C *i2c;
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int8_t address = DEFAULT_I2C_ADDRESS;
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float sensor_constants[4];
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const float p_Pa_calib[3] = {45000.0f, 80000.0f, 105000.0f};
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const float LUT_lower = 3.5 * (1 << 20);
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const float LUT_upper = 11.5 * (1 << 20);
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const float quadr_factor = 1.0 / 16777216.0;
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const float offst_factor = 2048.0;
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2021-07-23 11:18:17 +00:00
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bool read_otp();
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2021-07-22 17:36:33 +00:00
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void process_data(const int p_LSB, const int T_LSB, float *pressure, float *temperature);
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void calculate_conversion_constants(const float *p_Pa, const float *p_LUT, float *out);
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uint8_t crc8(uint8_t *bytes, size_t length, uint8_t polynomial = 0x31);
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};
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}
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