BMI055_gyro.hpp

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#pragma once

#include <lib/drivers/gyroscope/PX4Gyroscope.hpp>

#include "BMI055.hpp"

#define BMI055_DEVICE_PATH_GYRO     "/dev/bmi055_gyro"
#define BMI055_DEVICE_PATH_GYRO_EXT "/dev/bmi055_gyro_ext"

// BMI055 Gyro registers
#define BMI055_GYR_CHIP_ID          0x00
#define BMI055_GYR_X_L              0x02
#define BMI055_GYR_X_H              0x03
#define BMI055_GYR_Y_L              0x04
#define BMI055_GYR_Y_H              0x05
#define BMI055_GYR_Z_L              0x06
#define BMI055_GYR_Z_H              0x07
#define BMI055_GYR_INT_STATUS_0     0x09
#define BMI055_GYR_INT_STATUS_1     0x0A
#define BMI055_GYR_INT_STATUS_2     0x0B
#define BMI055_GYR_INT_STATUS_3     0x0C
#define BMI055_GYR_FIFO_STATUS      0x0E
#define BMI055_GYR_RANGE            0x0F
#define BMI055_GYR_BW               0x10
#define BMI055_GYR_LPM1             0x11
#define BMI055_GYR_LPM2             0x12
#define BMI055_GYR_RATE_HBW         0x13
#define BMI055_GYR_SOFTRESET        0x14
#define BMI055_GYR_INT_EN_0         0x15
#define BMI055_GYR_INT_EN_1         0x16
#define BMI055_GYR_INT_MAP_0        0x17
#define BMI055_GYR_INT_MAP_1        0x18
#define BMI055_GYR_INT_MAP_2        0x19
#define BMI055_GYRO_0_REG           0x1A
#define BMI055_GYRO_1_REG           0x1B
#define BMI055_GYRO_2_REG           0x1C
#define BMI055_GYRO_3_REG           0x1E
#define BMI055_GYR_INT_LATCH        0x21
#define BMI055_GYR_INT_LH_0         0x22
#define BMI055_GYR_INT_LH_1         0x23
#define BMI055_GYR_INT_LH_2         0x24
#define BMI055_GYR_INT_LH_3         0x25
#define BMI055_GYR_INT_LH_4         0x26
#define BMI055_GYR_INT_LH_5         0x27
#define BMI055_GYR_SOC              0x31
#define BMI055_GYR_A_FOC            0x32
#define BMI055_GYR_TRIM_NVM_CTRL    0x33
#define BMI055_BGW_SPI3_WDT         0x34
#define BMI055_GYR_OFFSET_COMP      0x36
#define BMI055_GYR_OFFSET_COMP_X    0x37
#define BMI055_GYR_OFFSET_COMP_Y    0x38
#define BMI055_GYR_OFFSET_COMP_Z    0x39
#define BMI055_GYR_TRIM_GPO         0x3A
#define BMI055_GYR_TRIM_GP1         0x3B
#define BMI055_GYR_SELF_TEST        0x3C
#define BMI055_GYR_FIFO_CONFIG_0    0x3D
#define BMI055_GYR_FIFO_CONFIG_1    0x3E
#define BMI055_GYR_FIFO_DATA        0x3F

// BMI055 Gyroscope Chip-Id
#define BMI055_GYR_WHO_AM_I         0x0F

// ODR & DLPF filter bandwidth settings (they are coupled)
#define BMI055_GYRO_RATE_100        (0<<3) | (1<<2) | (1<<1) | (1<<0)
#define BMI055_GYRO_RATE_200        (0<<3) | (1<<2) | (1<<1) | (0<<0)
#define BMI055_GYRO_RATE_400        (0<<3) | (0<<2) | (1<<1) | (1<<0)
#define BMI055_GYRO_RATE_1000       (0<<3) | (0<<2) | (1<<1) | (0<<0)
#define BMI055_GYRO_RATE_2000       (0<<3) | (0<<2) | (0<<1) | (1<<0)

//BMI055_GYR_LPM1      0x11
#define BMI055_GYRO_NORMAL          (0<<7) | (0<<5)
#define BMI055_GYRO_DEEP_SUSPEND    (0<<7) | (1<<5)
#define BMI055_GYRO_SUSPEND         (1<<7) | (0<<5)

//BMI055_GYR_RANGE        0x0F
#define BMI055_GYRO_RANGE_2000_DPS  (0<<2) | (0<<1) | (0<<0)
#define BMI055_GYRO_RANGE_1000_DPS  (0<<2) | (0<<1) | (1<<0)
#define BMI055_GYRO_RANGE_500_DPS   (0<<2) | (1<<1) | (0<<0)
#define BMI055_GYRO_RANGE_250_DPS   (0<<2) | (1<<1) | (1<<0)
#define BMI055_GYRO_RANGE_125_DPS   (1<<2) | (0<<1) | (0<<0)

//BMI055_GYR_INT_EN_0         0x15
#define BMI055_GYR_DRDY_INT_EN      (1<<7)

//BMI055_GYR_INT_MAP_1     0x18
#define BMI055_GYR_DRDY_INT1        (1<<0)

// Default and Max values
#define BMI055_GYRO_DEFAULT_RANGE_DPS       2000
#define BMI055_GYRO_DEFAULT_RATE            1000
#define BMI055_GYRO_MAX_RATE                1000
#define BMI055_GYRO_MAX_PUBLISH_RATE        280

#define BMI055_GYRO_DEFAULT_DRIVER_FILTER_FREQ  50

/* Mask definitions for Gyro bandwidth */
#define BMI055_GYRO_BW_MASK                  0x0F

#define BMI055_ACC_TEMP             0x08

class BMI055_gyro : public BMI055, public px4::ScheduledWorkItem
{
public:
    BMI055_gyro(int bus, const char *path_gyro, uint32_t device, enum Rotation rotation);
    virtual ~BMI055_gyro();

    virtual int     init();

    // Start automatic measurement.
    void            start();

    /**
    * Diagnostics - print some basic information about the driver.
    */
    void            print_info();

    void            print_registers();

    // deliberately cause a sensor error
    void            test_error();

protected:

    virtual int     probe();

private:

    PX4Gyroscope    _px4_gyro;

    perf_counter_t      _sample_perf;
    perf_counter_t      _bad_transfers;
    perf_counter_t      _bad_registers;

    // this is used to support runtime checking of key
    // configuration registers to detect SPI bus errors and sensor
    // reset
#define BMI055_GYRO_NUM_CHECKED_REGISTERS 7
    static const uint8_t    _checked_registers[BMI055_GYRO_NUM_CHECKED_REGISTERS];
    uint8_t         _checked_values[BMI055_GYRO_NUM_CHECKED_REGISTERS];
    uint8_t         _checked_bad[BMI055_GYRO_NUM_CHECKED_REGISTERS];

    /**
     * Stop automatic measurement.
     */
    void            stop();

    /**
     * Reset chip.
     *
     * Resets the chip and measurements ranges, but not scale and offset.
     */
    int         reset();

    void     Run() override;

    /**
     * Fetch measurements from the sensor and update the report buffers.
     */
    void            measure();

    /**
     * Modify a register in the BMI055_gyro
     *
     * Bits are cleared before bits are set.
     *
     * @param reg       The register to modify.
     * @param clearbits Bits in the register to clear.
     * @param setbits   Bits in the register to set.
     */
    void            modify_reg(unsigned reg, uint8_t clearbits, uint8_t setbits);

    /**
     * Write a register in the BMI055_gyro, updating _checked_values
     *
     * @param reg       The register to write.
     * @param value     The new value to write.
     */
    void            write_checked_reg(unsigned reg, uint8_t value);

    /**
     * Set the BMI055_gyro measurement range.
     *
     * @param max_dps   The maximum DPS value the range must support.
     * @return      OK if the value can be supported, -EINVAL otherwise.
     */
    int         set_gyro_range(unsigned max_dps);

    /*
     * set gyro sample rate
     */
    int gyro_set_sample_rate(float desired_sample_rate_hz);

    /*
     * check that key registers still have the right value
     */
    void check_registers(void);

    /* do not allow to copy this class due to pointer data members */
    BMI055_gyro(const BMI055_gyro &);
    BMI055_gyro operator=(const BMI055_gyro &);

#pragma pack(push, 1)
    /**
     * Report conversation within the BMI055_gyro, including command byte and
     * interrupt status.
     */
    struct BMI_GyroReport {
        uint8_t     cmd;
        int16_t     gyro_x;
        int16_t     gyro_y;
        int16_t     gyro_z;
    };
#pragma pack(pop)

};