mirror of https://github.com/ArduPilot/ardupilot
96 lines
2.6 KiB
C++
96 lines
2.6 KiB
C++
/// -*- tab-width: 4; Mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*-
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#ifndef __AP_INERTIAL_SENSOR_MPU6000_H__
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#define __AP_INERTIAL_SENSOR_MPU6000_H__
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#include <stdint.h>
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#include <AP_HAL.h>
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#include <AP_Math.h>
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#include <AP_Progmem.h>
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#include "AP_InertialSensor.h"
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// enable debug to see a register dump on startup
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#define MPU6000_DEBUG 0
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// on fast CPUs we sample at 1kHz and use a software filter
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#if HAL_CPU_CLASS >= HAL_CPU_CLASS_75
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#define MPU6000_FAST_SAMPLING 1
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#else
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#define MPU6000_FAST_SAMPLING 0
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#endif
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#if MPU6000_FAST_SAMPLING
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#include <Filter.h>
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#include <LowPassFilter2p.h>
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#endif
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class AP_InertialSensor_MPU6000 : public AP_InertialSensor_Backend
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{
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public:
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AP_InertialSensor_MPU6000(AP_InertialSensor &imu);
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/* update accel and gyro state */
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bool update();
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bool gyro_sample_available(void) { return _sum_count >= _sample_count; }
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bool accel_sample_available(void) { return _sum_count >= _sample_count; }
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// detect the sensor
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static AP_InertialSensor_Backend *detect(AP_InertialSensor &imu);
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private:
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#if MPU6000_DEBUG
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void _dump_registers(void);
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#endif
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// instance numbers of accel and gyro data
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uint8_t _gyro_instance;
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uint8_t _accel_instance;
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AP_HAL::DigitalSource *_drdy_pin;
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bool _init_sensor(void);
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bool _sample_available();
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void _read_data_transaction();
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bool _data_ready();
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void _poll_data(void);
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uint8_t _register_read( uint8_t reg );
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void _register_write( uint8_t reg, uint8_t val );
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void _register_write_check(uint8_t reg, uint8_t val);
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bool _hardware_init(void);
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AP_HAL::SPIDeviceDriver *_spi;
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AP_HAL::Semaphore *_spi_sem;
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static const float _gyro_scale;
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// support for updating filter at runtime
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int8_t _last_accel_filter_hz;
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int8_t _last_gyro_filter_hz;
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void _set_filter_register(uint16_t filter_hz);
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// count of bus errors
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uint16_t _error_count;
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// how many hardware samples before we report a sample to the caller
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uint8_t _sample_count;
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#if MPU6000_FAST_SAMPLING
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Vector3f _accel_filtered;
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Vector3f _gyro_filtered;
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// Low Pass filters for gyro and accel
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LowPassFilter2pVector3f _accel_filter;
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LowPassFilter2pVector3f _gyro_filter;
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#else
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// accumulation in timer - must be read with timer disabled
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// the sum of the values since last read
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Vector3l _accel_sum;
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Vector3l _gyro_sum;
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#endif
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volatile uint16_t _sum_count;
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};
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#endif // __AP_INERTIAL_SENSOR_MPU6000_H__
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