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/****************************************************************************
*
* Copyright (c) 2013-2015 PX4 Development Team. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name PX4 nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/**
* @file lsm303d.cpp
* Driver for the ST LSM303D MEMS accelerometer / magnetometer connected via SPI.
*/
#include <px4_config.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <stdint.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdlib.h>
#include <semaphore.h>
#include <string.h>
#include <fcntl.h>
#include <poll.h>
#include <errno.h>
#include <stdio.h>
#include <math.h>
#include <unistd.h>
#include <getopt.h>
#include <systemlib/perf_counter.h>
#include <systemlib/err.h>
#include <nuttx/arch.h>
#include <nuttx/clock.h>
#include <drivers/drv_hrt.h>
#include <drivers/device/spi.h>
#include <drivers/drv_accel.h>
#include <drivers/drv_mag.h>
#include <drivers/device/ringbuffer.h>
#include <drivers/device/integrator.h>
#include <board_config.h>
#include <mathlib/math/filter/LowPassFilter2p.hpp>
#include <lib/conversion/rotation.h>
/* oddly, ERROR is not defined for c++ */
#ifdef ERROR
# undef ERROR
#endif
static const int ERROR = -1;
/* SPI protocol address bits */
#define DIR_READ (1<<7)
#define DIR_WRITE (0<<7)
#define ADDR_INCREMENT (1<<6)
#define LSM303D_DEVICE_PATH_ACCEL "/dev/lsm303d_accel"
#define LSM303D_DEVICE_PATH_ACCEL_EXT "/dev/lsm303d_accel_ext"
#define LSM303D_DEVICE_PATH_MAG "/dev/lsm303d_mag"
/* register addresses: A: accel, M: mag, T: temp */
#define ADDR_WHO_AM_I 0x0F
#define WHO_I_AM 0x49
#define ADDR_OUT_TEMP_L 0x05
#define ADDR_OUT_TEMP_H 0x06
#define ADDR_STATUS_M 0x07
#define ADDR_OUT_X_L_M 0x08
#define ADDR_OUT_X_H_M 0x09
#define ADDR_OUT_Y_L_M 0x0A
#define ADDR_OUT_Y_H_M 0x0B
#define ADDR_OUT_Z_L_M 0x0C
#define ADDR_OUT_Z_H_M 0x0D
#define ADDR_INT_CTRL_M 0x12
#define ADDR_INT_SRC_M 0x13
#define ADDR_REFERENCE_X 0x1c
#define ADDR_REFERENCE_Y 0x1d
#define ADDR_REFERENCE_Z 0x1e
#define ADDR_STATUS_A 0x27
#define ADDR_OUT_X_L_A 0x28
#define ADDR_OUT_X_H_A 0x29
#define ADDR_OUT_Y_L_A 0x2A
#define ADDR_OUT_Y_H_A 0x2B
#define ADDR_OUT_Z_L_A 0x2C
#define ADDR_OUT_Z_H_A 0x2D
#define ADDR_CTRL_REG0 0x1F
#define ADDR_CTRL_REG1 0x20
#define ADDR_CTRL_REG2 0x21
#define ADDR_CTRL_REG3 0x22
#define ADDR_CTRL_REG4 0x23
#define ADDR_CTRL_REG5 0x24
#define ADDR_CTRL_REG6 0x25
#define ADDR_CTRL_REG7 0x26
#define ADDR_FIFO_CTRL 0x2e
#define ADDR_FIFO_SRC 0x2f
#define ADDR_IG_CFG1 0x30
#define ADDR_IG_SRC1 0x31
#define ADDR_IG_THS1 0x32
#define ADDR_IG_DUR1 0x33
#define ADDR_IG_CFG2 0x34
#define ADDR_IG_SRC2 0x35
#define ADDR_IG_THS2 0x36
#define ADDR_IG_DUR2 0x37
#define ADDR_CLICK_CFG 0x38
#define ADDR_CLICK_SRC 0x39
#define ADDR_CLICK_THS 0x3a
#define ADDR_TIME_LIMIT 0x3b
#define ADDR_TIME_LATENCY 0x3c
#define ADDR_TIME_WINDOW 0x3d
#define ADDR_ACT_THS 0x3e
#define ADDR_ACT_DUR 0x3f
#define REG1_RATE_BITS_A ((1<<7) | (1<<6) | (1<<5) | (1<<4))
#define REG1_POWERDOWN_A ((0<<7) | (0<<6) | (0<<5) | (0<<4))
#define REG1_RATE_3_125HZ_A ((0<<7) | (0<<6) | (0<<5) | (1<<4))
#define REG1_RATE_6_25HZ_A ((0<<7) | (0<<6) | (1<<5) | (0<<4))
#define REG1_RATE_12_5HZ_A ((0<<7) | (0<<6) | (1<<5) | (1<<4))
#define REG1_RATE_25HZ_A ((0<<7) | (1<<6) | (0<<5) | (0<<4))
#define REG1_RATE_50HZ_A ((0<<7) | (1<<6) | (0<<5) | (1<<4))
#define REG1_RATE_100HZ_A ((0<<7) | (1<<6) | (1<<5) | (0<<4))
#define REG1_RATE_200HZ_A ((0<<7) | (1<<6) | (1<<5) | (1<<4))
#define REG1_RATE_400HZ_A ((1<<7) | (0<<6) | (0<<5) | (0<<4))
#define REG1_RATE_800HZ_A ((1<<7) | (0<<6) | (0<<5) | (1<<4))
#define REG1_RATE_1600HZ_A ((1<<7) | (0<<6) | (1<<5) | (0<<4))
#define REG1_BDU_UPDATE (1<<3)
#define REG1_Z_ENABLE_A (1<<2)
#define REG1_Y_ENABLE_A (1<<1)
#define REG1_X_ENABLE_A (1<<0)
#define REG2_ANTIALIAS_FILTER_BW_BITS_A ((1<<7) | (1<<6))
#define REG2_AA_FILTER_BW_773HZ_A ((0<<7) | (0<<6))
#define REG2_AA_FILTER_BW_194HZ_A ((0<<7) | (1<<6))
#define REG2_AA_FILTER_BW_362HZ_A ((1<<7) | (0<<6))
#define REG2_AA_FILTER_BW_50HZ_A ((1<<7) | (1<<6))
#define REG2_FULL_SCALE_BITS_A ((1<<5) | (1<<4) | (1<<3))
#define REG2_FULL_SCALE_2G_A ((0<<5) | (0<<4) | (0<<3))
#define REG2_FULL_SCALE_4G_A ((0<<5) | (0<<4) | (1<<3))
#define REG2_FULL_SCALE_6G_A ((0<<5) | (1<<4) | (0<<3))
#define REG2_FULL_SCALE_8G_A ((0<<5) | (1<<4) | (1<<3))
#define REG2_FULL_SCALE_16G_A ((1<<5) | (0<<4) | (0<<3))
#define REG5_ENABLE_T (1<<7)
#define REG5_RES_HIGH_M ((1<<6) | (1<<5))
#define REG5_RES_LOW_M ((0<<6) | (0<<5))
#define REG5_RATE_BITS_M ((1<<4) | (1<<3) | (1<<2))
#define REG5_RATE_3_125HZ_M ((0<<4) | (0<<3) | (0<<2))
#define REG5_RATE_6_25HZ_M ((0<<4) | (0<<3) | (1<<2))
#define REG5_RATE_12_5HZ_M ((0<<4) | (1<<3) | (0<<2))
#define REG5_RATE_25HZ_M ((0<<4) | (1<<3) | (1<<2))
#define REG5_RATE_50HZ_M ((1<<4) | (0<<3) | (0<<2))
#define REG5_RATE_100HZ_M ((1<<4) | (0<<3) | (1<<2))
#define REG5_RATE_DO_NOT_USE_M ((1<<4) | (1<<3) | (0<<2))
#define REG6_FULL_SCALE_BITS_M ((1<<6) | (1<<5))
#define REG6_FULL_SCALE_2GA_M ((0<<6) | (0<<5))
#define REG6_FULL_SCALE_4GA_M ((0<<6) | (1<<5))
#define REG6_FULL_SCALE_8GA_M ((1<<6) | (0<<5))
#define REG6_FULL_SCALE_12GA_M ((1<<6) | (1<<5))
#define REG7_CONT_MODE_M ((0<<1) | (0<<0))
#define REG_STATUS_A_NEW_ZYXADA 0x08
#define INT_CTRL_M 0x12
#define INT_SRC_M 0x13
/* default values for this device */
#define LSM303D_ACCEL_DEFAULT_RANGE_G 8
#define LSM303D_ACCEL_DEFAULT_RATE 800
#define LSM303D_ACCEL_DEFAULT_ONCHIP_FILTER_FREQ 50
#define LSM303D_ACCEL_DEFAULT_DRIVER_FILTER_FREQ 30
#define LSM303D_ACCEL_MAX_OUTPUT_RATE 280
#define LSM303D_MAG_DEFAULT_RANGE_GA 2
#define LSM303D_MAG_DEFAULT_RATE 100
#define LSM303D_ONE_G 9.80665f
#ifdef PX4_SPI_BUS_EXT
#define EXTERNAL_BUS PX4_SPI_BUS_EXT
#else
#define EXTERNAL_BUS 0
#endif
/*
we set the timer interrupt to run a bit faster than the desired
sample rate and then throw away duplicates using the data ready bit.
This time reduction is enough to cope with worst case timing jitter
due to other timers
*/
#define LSM303D_TIMER_REDUCTION 200
extern "C" { __EXPORT int lsm303d_main(int argc, char *argv[]); }
class LSM303D_mag;
class LSM303D : public device::SPI
{
public:
LSM303D(int bus, const char *path, spi_dev_e device, enum Rotation rotation);
virtual ~LSM303D();
virtual int init();
virtual ssize_t read(struct file *filp, char *buffer, size_t buflen);
virtual int ioctl(struct file *filp, int cmd, unsigned long arg);
/**
* Diagnostics - print some basic information about the driver.
*/
void print_info();
/**
* dump register values
*/
void print_registers();
/**
* deliberately trigger an error
*/
void test_error();
protected:
virtual int probe();
friend class LSM303D_mag;
virtual ssize_t mag_read(struct file *filp, char *buffer, size_t buflen);
virtual int mag_ioctl(struct file *filp, int cmd, unsigned long arg);
private:
LSM303D_mag *_mag;
struct hrt_call _accel_call;
struct hrt_call _mag_call;
unsigned _call_accel_interval;
unsigned _call_mag_interval;
ringbuffer::RingBuffer *_accel_reports;
ringbuffer::RingBuffer *_mag_reports;
struct accel_calibration_s _accel_scale;
unsigned _accel_range_m_s2;
float _accel_range_scale;
unsigned _accel_samplerate;
unsigned _accel_onchip_filter_bandwith;
struct mag_calibration_s _mag_scale;
unsigned _mag_range_ga;
float _mag_range_scale;
unsigned _mag_samplerate;
orb_advert_t _accel_topic;
int _accel_orb_class_instance;
int _accel_class_instance;
unsigned _accel_read;
unsigned _mag_read;
perf_counter_t _accel_sample_perf;
perf_counter_t _mag_sample_perf;
perf_counter_t _bad_registers;
perf_counter_t _bad_values;
perf_counter_t _accel_duplicates;
uint8_t _register_wait;
math::LowPassFilter2p _accel_filter_x;
math::LowPassFilter2p _accel_filter_y;
math::LowPassFilter2p _accel_filter_z;
Integrator _accel_int;
enum Rotation _rotation;
// values used to
float _last_accel[3];
uint8_t _constant_accel_count;
// last temperature value
float _last_temperature;
// this is used to support runtime checking of key
// configuration registers to detect SPI bus errors and sensor
// reset
#define LSM303D_NUM_CHECKED_REGISTERS 8
static const uint8_t _checked_registers[LSM303D_NUM_CHECKED_REGISTERS];
uint8_t _checked_values[LSM303D_NUM_CHECKED_REGISTERS];
uint8_t _checked_next;
/**
* Start automatic measurement.
*/
void start();
/**
* Stop automatic measurement.
*/
void stop();
/**
* Reset chip.
*
* Resets the chip and measurements ranges, but not scale and offset.
*/
void reset();
/**
* disable I2C on the chip
*/
void disable_i2c();
/**
* Get the internal / external state
*
* @return true if the sensor is not on the main MCU board
*/
bool is_external() { return (_bus == EXTERNAL_BUS); }
/**
* Static trampoline from the hrt_call context; because we don't have a
* generic hrt wrapper yet.
*
* Called by the HRT in interrupt context at the specified rate if
* automatic polling is enabled.
*
* @param arg Instance pointer for the driver that is polling.
*/
static void measure_trampoline(void *arg);
/**
* Static trampoline for the mag because it runs at a lower rate
*
* @param arg Instance pointer for the driver that is polling.
*/
static void mag_measure_trampoline(void *arg);
/**
* check key registers for correct values
*/
void check_registers(void);
/**
* Fetch accel measurements from the sensor and update the report ring.
*/
void measure();
/**
* Fetch mag measurements from the sensor and update the report ring.
*/
void mag_measure();
/**
* Accel self test
*
* @return 0 on success, 1 on failure
*/
int accel_self_test();
/**
* Mag self test
*
* @return 0 on success, 1 on failure
*/
int mag_self_test();
/**
* Read a register from the LSM303D
*
* @param The register to read.
* @return The value that was read.
*/
uint8_t read_reg(unsigned reg);
/**
* Write a register in the LSM303D
*
* @param reg The register to write.
* @param value The new value to write.
*/
void write_reg(unsigned reg, uint8_t value);
/**
* Modify a register in the LSM303D
*
* 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 LSM303D, 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 LSM303D accel measurement range.
*
* @param max_g The measurement range of the accel is in g (9.81m/s^2)
* Zero selects the maximum supported range.
* @return OK if the value can be supported, -ERANGE otherwise.
*/
int accel_set_range(unsigned max_g);
/**
* Set the LSM303D mag measurement range.
*
* @param max_ga The measurement range of the mag is in Ga
* Zero selects the maximum supported range.
* @return OK if the value can be supported, -ERANGE otherwise.
*/
int mag_set_range(unsigned max_g);
/**
* Set the LSM303D on-chip anti-alias filter bandwith.
*
* @param bandwidth The anti-alias filter bandwidth in Hz
* Zero selects the highest bandwidth
* @return OK if the value can be supported, -ERANGE otherwise.
*/
int accel_set_onchip_lowpass_filter_bandwidth(unsigned bandwidth);
/**
* Set the driver lowpass filter bandwidth.
*
* @param bandwidth The anti-alias filter bandwidth in Hz
* Zero selects the highest bandwidth
* @return OK if the value can be supported, -ERANGE otherwise.
*/
int accel_set_driver_lowpass_filter(float samplerate, float bandwidth);
/**
* Set the LSM303D internal accel sampling frequency.
*
* @param frequency The internal accel sampling frequency is set to not less than
* this value.
* Zero selects the maximum rate supported.
* @return OK if the value can be supported.
*/
int accel_set_samplerate(unsigned frequency);
/**
* Set the LSM303D internal mag sampling frequency.
*
* @param frequency The internal mag sampling frequency is set to not less than
* this value.
* Zero selects the maximum rate supported.
* @return OK if the value can be supported.
*/
int mag_set_samplerate(unsigned frequency);
/* this class cannot be copied */
LSM303D(const LSM303D &);
LSM303D operator=(const LSM303D &);
};
/*
list of registers that will be checked in check_registers(). Note
that ADDR_WHO_AM_I must be first in the list.
*/
const uint8_t LSM303D::_checked_registers[LSM303D_NUM_CHECKED_REGISTERS] = { ADDR_WHO_AM_I,
ADDR_CTRL_REG1,
ADDR_CTRL_REG2,
ADDR_CTRL_REG3,
ADDR_CTRL_REG4,
ADDR_CTRL_REG5,
ADDR_CTRL_REG6,
ADDR_CTRL_REG7
};
/**
* Helper class implementing the mag driver node.
*/
class LSM303D_mag : public device::CDev
{
public:
LSM303D_mag(LSM303D *parent);
~LSM303D_mag();
virtual ssize_t read(struct file *filp, char *buffer, size_t buflen);
virtual int ioctl(struct file *filp, int cmd, unsigned long arg);
virtual int init();
protected:
friend class LSM303D;
void parent_poll_notify();
private:
LSM303D *_parent;
orb_advert_t _mag_topic;
int _mag_orb_class_instance;
int _mag_class_instance;
void measure();
void measure_trampoline(void *arg);
/* this class does not allow copying due to ptr data members */
LSM303D_mag(const LSM303D_mag &);
LSM303D_mag operator=(const LSM303D_mag &);
};
LSM303D::LSM303D(int bus, const char *path, spi_dev_e device, enum Rotation rotation) :
SPI("LSM303D", path, bus, device, SPIDEV_MODE3,
11 * 1000 * 1000 /* will be rounded to 10.4 MHz, within safety margins for LSM303D */),
_mag(new LSM303D_mag(this)),
_accel_call{},
_mag_call{},
_call_accel_interval(0),
_call_mag_interval(0),
_accel_reports(nullptr),
_mag_reports(nullptr),
_accel_scale{},
_accel_range_m_s2(0.0f),
_accel_range_scale(0.0f),
_accel_samplerate(0),
_accel_onchip_filter_bandwith(0),
_mag_scale{},
_mag_range_ga(0.0f),
_mag_range_scale(0.0f),
_mag_samplerate(0),
_accel_topic(nullptr),
_accel_orb_class_instance(-1),
_accel_class_instance(-1),
_accel_read(0),
_mag_read(0),
_accel_sample_perf(perf_alloc(PC_ELAPSED, "lsm303d_acc_read")),
_mag_sample_perf(perf_alloc(PC_ELAPSED, "lsm303d_mag_read")),
_bad_registers(perf_alloc(PC_COUNT, "lsm303d_bad_reg")),
_bad_values(perf_alloc(PC_COUNT, "lsm303d_bad_val")),
_accel_duplicates(perf_alloc(PC_COUNT, "lsm303d_acc_dupe")),
_register_wait(0),
_accel_filter_x(LSM303D_ACCEL_DEFAULT_RATE, LSM303D_ACCEL_DEFAULT_DRIVER_FILTER_FREQ),
_accel_filter_y(LSM303D_ACCEL_DEFAULT_RATE, LSM303D_ACCEL_DEFAULT_DRIVER_FILTER_FREQ),
_accel_filter_z(LSM303D_ACCEL_DEFAULT_RATE, LSM303D_ACCEL_DEFAULT_DRIVER_FILTER_FREQ),
_accel_int(1000000 / LSM303D_ACCEL_MAX_OUTPUT_RATE, true),
_rotation(rotation),
_constant_accel_count(0),
_last_temperature(0),
_checked_next(0)
{
// enable debug() calls
_debug_enabled = true;
_device_id.devid_s.devtype = DRV_ACC_DEVTYPE_LSM303D;
/* Prime _mag with parents devid. */
_mag->_device_id.devid = _device_id.devid;
_mag->_device_id.devid_s.devtype = DRV_MAG_DEVTYPE_LSM303D;
// default scale factors
_accel_scale.x_offset = 0.0f;
_accel_scale.x_scale = 1.0f;
_accel_scale.y_offset = 0.0f;
_accel_scale.y_scale = 1.0f;
_accel_scale.z_offset = 0.0f;
_accel_scale.z_scale = 1.0f;
_mag_scale.x_offset = 0.0f;
_mag_scale.x_scale = 1.0f;
_mag_scale.y_offset = 0.0f;
_mag_scale.y_scale = 1.0f;
_mag_scale.z_offset = 0.0f;
_mag_scale.z_scale = 1.0f;
}
LSM303D::~LSM303D()
{
/* make sure we are truly inactive */
stop();
/* free any existing reports */
if (_accel_reports != nullptr) {
delete _accel_reports;
}
if (_mag_reports != nullptr) {
delete _mag_reports;
}
if (_accel_class_instance != -1) {
unregister_class_devname(ACCEL_BASE_DEVICE_PATH, _accel_class_instance);
}
delete _mag;
/* delete the perf counter */
perf_free(_accel_sample_perf);
perf_free(_mag_sample_perf);
perf_free(_bad_registers);
perf_free(_bad_values);
perf_free(_accel_duplicates);
}
int
LSM303D::init()
{
int ret = ERROR;
/* do SPI init (and probe) first */
if (SPI::init() != OK) {
warnx("SPI init failed");
goto out;
}
/* allocate basic report buffers */
_accel_reports = new ringbuffer::RingBuffer(2, sizeof(accel_report));
if (_accel_reports == nullptr) {
goto out;
}
_mag_reports = new ringbuffer::RingBuffer(2, sizeof(mag_report));
if (_mag_reports == nullptr) {
goto out;
}
reset();
/* do CDev init for the mag device node */
ret = _mag->init();
if (ret != OK) {
warnx("MAG init failed");
goto out;
}
/* fill report structures */
measure();
/* advertise sensor topic, measure manually to initialize valid report */
struct mag_report mrp;
_mag_reports->get(&mrp);
/* measurement will have generated a report, publish */
_mag->_mag_topic = orb_advertise_multi(ORB_ID(sensor_mag), &mrp,
&_mag->_mag_orb_class_instance, ORB_PRIO_LOW);
if (_mag->_mag_topic == nullptr) {
warnx("ADVERT ERR");
}
_accel_class_instance = register_class_devname(ACCEL_BASE_DEVICE_PATH);
/* advertise sensor topic, measure manually to initialize valid report */
struct accel_report arp;
_accel_reports->get(&arp);
/* measurement will have generated a report, publish */
_accel_topic = orb_advertise_multi(ORB_ID(sensor_accel), &arp,
&_accel_orb_class_instance, (is_external()) ? ORB_PRIO_VERY_HIGH : ORB_PRIO_DEFAULT);
if (_accel_topic == nullptr) {
warnx("ADVERT ERR");
}
out:
return ret;
}
void
LSM303D::disable_i2c(void)
{
uint8_t a = read_reg(0x02);
write_reg(0x02, (0x10 | a));
a = read_reg(0x02);
write_reg(0x02, (0xF7 & a));
a = read_reg(0x15);
write_reg(0x15, (0x80 | a));
a = read_reg(0x02);
write_reg(0x02, (0xE7 & a));
}
void
LSM303D::reset()
{
// ensure the chip doesn't interpret any other bus traffic as I2C
disable_i2c();
/* enable accel*/
write_checked_reg(ADDR_CTRL_REG1,
REG1_X_ENABLE_A | REG1_Y_ENABLE_A | REG1_Z_ENABLE_A | REG1_BDU_UPDATE | REG1_RATE_800HZ_A);
/* enable mag */
write_checked_reg(ADDR_CTRL_REG7, REG7_CONT_MODE_M);
write_checked_reg(ADDR_CTRL_REG5, REG5_RES_HIGH_M | REG5_ENABLE_T);
write_checked_reg(ADDR_CTRL_REG3, 0x04); // DRDY on ACCEL on INT1
write_checked_reg(ADDR_CTRL_REG4, 0x04); // DRDY on MAG on INT2
accel_set_range(LSM303D_ACCEL_DEFAULT_RANGE_G);
accel_set_samplerate(LSM303D_ACCEL_DEFAULT_RATE);
accel_set_driver_lowpass_filter((float)LSM303D_ACCEL_DEFAULT_RATE, (float)LSM303D_ACCEL_DEFAULT_DRIVER_FILTER_FREQ);
// we setup the anti-alias on-chip filter as 50Hz. We believe
// this operates in the analog domain, and is critical for
// anti-aliasing. The 2 pole software filter is designed to
// operate in conjunction with this on-chip filter
accel_set_onchip_lowpass_filter_bandwidth(LSM303D_ACCEL_DEFAULT_ONCHIP_FILTER_FREQ);
mag_set_range(LSM303D_MAG_DEFAULT_RANGE_GA);
mag_set_samplerate(LSM303D_MAG_DEFAULT_RATE);
_accel_read = 0;
_mag_read = 0;
}
int
LSM303D::probe()
{
/* read dummy value to void to clear SPI statemachine on sensor */
(void)read_reg(ADDR_WHO_AM_I);
/* verify that the device is attached and functioning */
bool success = (read_reg(ADDR_WHO_AM_I) == WHO_I_AM);
if (success) {
_checked_values[0] = WHO_I_AM;
return OK;
}
return -EIO;
}
ssize_t
LSM303D::read(struct file *filp, char *buffer, size_t buflen)
{
unsigned count = buflen / sizeof(struct accel_report);
accel_report *arb = reinterpret_cast<accel_report *>(buffer);
int ret = 0;
/* buffer must be large enough */
if (count < 1) {
return -ENOSPC;
}
/* if automatic measurement is enabled */
if (_call_accel_interval > 0) {
/*
* While there is space in the caller's buffer, and reports, copy them.
*/
while (count--) {
if (_accel_reports->get(arb)) {
ret += sizeof(*arb);
arb++;
}
}
/* if there was no data, warn the caller */
return ret ? ret : -EAGAIN;
}
/* manual measurement */
measure();
/* measurement will have generated a report, copy it out */
if (_accel_reports->get(arb)) {
ret = sizeof(*arb);
}
return ret;
}
ssize_t
LSM303D::mag_read(struct file *filp, char *buffer, size_t buflen)
{
unsigned count = buflen / sizeof(struct mag_report);
mag_report *mrb = reinterpret_cast<mag_report *>(buffer);
int ret = 0;
/* buffer must be large enough */
if (count < 1) {
return -ENOSPC;
}
/* if automatic measurement is enabled */
if (_call_mag_interval > 0) {
/*
* While there is space in the caller's buffer, and reports, copy them.
*/
while (count--) {
if (_mag_reports->get(mrb)) {
ret += sizeof(*mrb);
mrb++;
}
}
/* if there was no data, warn the caller */
return ret ? ret : -EAGAIN;
}
/* manual measurement */
_mag_reports->flush();
_mag->measure();
/* measurement will have generated a report, copy it out */
if (_mag_reports->get(mrb)) {
ret = sizeof(*mrb);
}
return ret;
}
int
LSM303D::ioctl(struct file *filp, int cmd, unsigned long arg)
{
switch (cmd) {
case SENSORIOCSPOLLRATE: {
switch (arg) {
/* switching to manual polling */
case SENSOR_POLLRATE_MANUAL:
stop();
_call_accel_interval = 0;
return OK;
/* external signalling not supported */
case SENSOR_POLLRATE_EXTERNAL:
/* zero would be bad */
case 0:
return -EINVAL;
/* set default/max polling rate */
case SENSOR_POLLRATE_MAX:
return ioctl(filp, SENSORIOCSPOLLRATE, 1600);
case SENSOR_POLLRATE_DEFAULT:
return ioctl(filp, SENSORIOCSPOLLRATE, LSM303D_ACCEL_DEFAULT_RATE);
/* adjust to a legal polling interval in Hz */
default: {
/* do we need to start internal polling? */
bool want_start = (_call_accel_interval == 0);
/* convert hz to hrt interval via microseconds */
unsigned ticks = 1000000 / arg;
/* check against maximum sane rate */
if (ticks < 500) {
return -EINVAL;
}
/* adjust filters */
accel_set_driver_lowpass_filter((float)arg, _accel_filter_x.get_cutoff_freq());
/* update interval for next measurement */
/* XXX this is a bit shady, but no other way to adjust... */
_call_accel_interval = ticks;
_accel_call.period = _call_accel_interval - LSM303D_TIMER_REDUCTION;
/* if we need to start the poll state machine, do it */
if (want_start) {
start();
}
return OK;
}
}
}
case SENSORIOCGPOLLRATE:
if (_call_accel_interval == 0) {
return SENSOR_POLLRATE_MANUAL;
}
return 1000000 / _call_accel_interval;
case SENSORIOCSQUEUEDEPTH: {
/* lower bound is mandatory, upper bound is a sanity check */
if ((arg < 1) || (arg > 100)) {
return -EINVAL;
}
irqstate_t flags = irqsave();
if (!_accel_reports->resize(arg)) {
irqrestore(flags);
return -ENOMEM;
}
irqrestore(flags);
return OK;
}
case SENSORIOCGQUEUEDEPTH:
return _accel_reports->size();
case SENSORIOCRESET:
reset();
return OK;
case ACCELIOCSSAMPLERATE:
return accel_set_samplerate(arg);
case ACCELIOCGSAMPLERATE:
return _accel_samplerate;
case ACCELIOCSLOWPASS: {
return accel_set_driver_lowpass_filter((float)_accel_samplerate, (float)arg);
}
case ACCELIOCGLOWPASS:
return static_cast<int>(_accel_filter_x.get_cutoff_freq());
case ACCELIOCSSCALE: {
/* copy scale, but only if off by a few percent */
struct accel_calibration_s *s = (struct accel_calibration_s *) arg;
float sum = s->x_scale + s->y_scale + s->z_scale;
if (sum > 2.0f && sum < 4.0f) {
memcpy(&_accel_scale, s, sizeof(_accel_scale));
return OK;
} else {
return -EINVAL;
}
}
case ACCELIOCSRANGE:
/* arg needs to be in G */
return accel_set_range(arg);
case ACCELIOCGRANGE:
/* convert to m/s^2 and return rounded in G */
return (unsigned long)((_accel_range_m_s2) / LSM303D_ONE_G + 0.5f);
case ACCELIOCGSCALE:
/* copy scale out */
memcpy((struct accel_calibration_s *) arg, &_accel_scale, sizeof(_accel_scale));
return OK;
case ACCELIOCSELFTEST:
return accel_self_test();
case ACCELIOCSHWLOWPASS:
accel_set_onchip_lowpass_filter_bandwidth(arg);
return OK;
case ACCELIOCGHWLOWPASS:
return _accel_onchip_filter_bandwith;
default:
/* give it to the superclass */
return SPI::ioctl(filp, cmd, arg);
}
}
int
LSM303D::mag_ioctl(struct file *filp, int cmd, unsigned long arg)
{
switch (cmd) {
case SENSORIOCSPOLLRATE: {
switch (arg) {
/* switching to manual polling */
case SENSOR_POLLRATE_MANUAL:
stop();
_call_mag_interval = 0;
return OK;
/* external signalling not supported */
case SENSOR_POLLRATE_EXTERNAL:
/* zero would be bad */
case 0:
return -EINVAL;
/* set default/max polling rate */
case SENSOR_POLLRATE_MAX:
case SENSOR_POLLRATE_DEFAULT:
/* 100 Hz is max for mag */
return mag_ioctl(filp, SENSORIOCSPOLLRATE, 100);
/* adjust to a legal polling interval in Hz */
default: {
/* do we need to start internal polling? */
bool want_start = (_call_mag_interval == 0);
/* convert hz to hrt interval via microseconds */
unsigned ticks = 1000000 / arg;
/* check against maximum sane rate */
if (ticks < 1000) {
return -EINVAL;
}
/* update interval for next measurement */
/* XXX this is a bit shady, but no other way to adjust... */
_mag_call.period = _call_mag_interval = ticks;
/* if we need to start the poll state machine, do it */
if (want_start) {
start();
}
return OK;
}
}
}
case SENSORIOCGPOLLRATE:
if (_call_mag_interval == 0) {
return SENSOR_POLLRATE_MANUAL;
}
return 1000000 / _call_mag_interval;
case SENSORIOCSQUEUEDEPTH: {
/* lower bound is mandatory, upper bound is a sanity check */
if ((arg < 1) || (arg > 100)) {
return -EINVAL;
}
irqstate_t flags = irqsave();
if (!_mag_reports->resize(arg)) {
irqrestore(flags);
return -ENOMEM;
}
irqrestore(flags);
return OK;
}
case SENSORIOCGQUEUEDEPTH:
return _mag_reports->size();
case SENSORIOCRESET:
reset();
return OK;
case MAGIOCSSAMPLERATE:
return mag_set_samplerate(arg);
case MAGIOCGSAMPLERATE:
return _mag_samplerate;
case MAGIOCSLOWPASS:
case MAGIOCGLOWPASS:
/* not supported, no internal filtering */
return -EINVAL;
case MAGIOCSSCALE:
/* copy scale in */
memcpy(&_mag_scale, (struct mag_calibration_s *) arg, sizeof(_mag_scale));
return OK;
case MAGIOCGSCALE:
/* copy scale out */
memcpy((struct mag_calibration_s *) arg, &_mag_scale, sizeof(_mag_scale));
return OK;
case MAGIOCSRANGE:
return mag_set_range(arg);
case MAGIOCGRANGE:
return _mag_range_ga;
case MAGIOCSELFTEST:
return mag_self_test();
case MAGIOCGEXTERNAL:
/* Even if this sensor is on the "external" SPI bus
* it is still fixed to the autopilot assembly,
* so always return 0.
*/
return 0;
default:
/* give it to the superclass */
return SPI::ioctl(filp, cmd, arg);
}
}
int
LSM303D::accel_self_test()
{
if (_accel_read == 0) {
return 1;
}
/* inspect accel offsets */
if (fabsf(_accel_scale.x_offset) < 0.000001f) {
return 1;
}
if (fabsf(_accel_scale.x_scale - 1.0f) > 0.4f || fabsf(_accel_scale.x_scale - 1.0f) < 0.000001f) {
return 1;
}
if (fabsf(_accel_scale.y_offset) < 0.000001f) {
return 1;
}
if (fabsf(_accel_scale.y_scale - 1.0f) > 0.4f || fabsf(_accel_scale.y_scale - 1.0f) < 0.000001f) {
return 1;
}
if (fabsf(_accel_scale.z_offset) < 0.000001f) {
return 1;
}
if (fabsf(_accel_scale.z_scale - 1.0f) > 0.4f || fabsf(_accel_scale.z_scale - 1.0f) < 0.000001f) {
return 1;
}
return 0;
}
int
LSM303D::mag_self_test()
{
if (_mag_read == 0) {
return 1;
}
/**
* inspect mag offsets
* don't check mag scale because it seems this is calibrated on chip
*/
if (fabsf(_mag_scale.x_offset) < 0.000001f) {
return 1;
}
if (fabsf(_mag_scale.y_offset) < 0.000001f) {
return 1;
}
if (fabsf(_mag_scale.z_offset) < 0.000001f) {
return 1;
}
return 0;
}
uint8_t
LSM303D::read_reg(unsigned reg)
{
uint8_t cmd[2];
cmd[0] = reg | DIR_READ;
cmd[1] = 0;
transfer(cmd, cmd, sizeof(cmd));
return cmd[1];
}
void
LSM303D::write_reg(unsigned reg, uint8_t value)
{
uint8_t cmd[2];
cmd[0] = reg | DIR_WRITE;
cmd[1] = value;
transfer(cmd, nullptr, sizeof(cmd));
}
void
LSM303D::write_checked_reg(unsigned reg, uint8_t value)
{
write_reg(reg, value);
for (uint8_t i = 0; i < LSM303D_NUM_CHECKED_REGISTERS; i++) {
if (reg == _checked_registers[i]) {
_checked_values[i] = value;
}
}
}
void
LSM303D::modify_reg(unsigned reg, uint8_t clearbits, uint8_t setbits)
{
uint8_t val;
val = read_reg(reg);
val &= ~clearbits;
val |= setbits;
write_checked_reg(reg, val);
}
int
LSM303D::accel_set_range(unsigned max_g)
{
uint8_t setbits = 0;
uint8_t clearbits = REG2_FULL_SCALE_BITS_A;
float new_scale_g_digit = 0.0f;
if (max_g == 0) {
max_g = 16;
}
if (max_g <= 2) {
_accel_range_m_s2 = 2.0f * LSM303D_ONE_G;
setbits |= REG2_FULL_SCALE_2G_A;
new_scale_g_digit = 0.061e-3f;
} else if (max_g <= 4) {
_accel_range_m_s2 = 4.0f * LSM303D_ONE_G;
setbits |= REG2_FULL_SCALE_4G_A;
new_scale_g_digit = 0.122e-3f;
} else if (max_g <= 6) {
_accel_range_m_s2 = 6.0f * LSM303D_ONE_G;
setbits |= REG2_FULL_SCALE_6G_A;
new_scale_g_digit = 0.183e-3f;
} else if (max_g <= 8) {
_accel_range_m_s2 = 8.0f * LSM303D_ONE_G;
setbits |= REG2_FULL_SCALE_8G_A;
new_scale_g_digit = 0.244e-3f;
} else if (max_g <= 16) {
_accel_range_m_s2 = 16.0f * LSM303D_ONE_G;
setbits |= REG2_FULL_SCALE_16G_A;
new_scale_g_digit = 0.732e-3f;
} else {
return -EINVAL;
}
_accel_range_scale = new_scale_g_digit * LSM303D_ONE_G;
modify_reg(ADDR_CTRL_REG2, clearbits, setbits);
return OK;
}
int
LSM303D::mag_set_range(unsigned max_ga)
{
uint8_t setbits = 0;
uint8_t clearbits = REG6_FULL_SCALE_BITS_M;
float new_scale_ga_digit = 0.0f;
if (max_ga == 0) {
max_ga = 12;
}
if (max_ga <= 2) {
_mag_range_ga = 2;
setbits |= REG6_FULL_SCALE_2GA_M;
new_scale_ga_digit = 0.080e-3f;
} else if (max_ga <= 4) {
_mag_range_ga = 4;
setbits |= REG6_FULL_SCALE_4GA_M;
new_scale_ga_digit = 0.160e-3f;
} else if (max_ga <= 8) {
_mag_range_ga = 8;
setbits |= REG6_FULL_SCALE_8GA_M;
new_scale_ga_digit = 0.320e-3f;
} else if (max_ga <= 12) {
_mag_range_ga = 12;
setbits |= REG6_FULL_SCALE_12GA_M;
new_scale_ga_digit = 0.479e-3f;
} else {
return -EINVAL;
}
_mag_range_scale = new_scale_ga_digit;
modify_reg(ADDR_CTRL_REG6, clearbits, setbits);
return OK;
}
int
LSM303D::accel_set_onchip_lowpass_filter_bandwidth(unsigned bandwidth)
{
uint8_t setbits = 0;
uint8_t clearbits = REG2_ANTIALIAS_FILTER_BW_BITS_A;
if (bandwidth == 0) {
bandwidth = 773;
}
if (bandwidth <= 50) {
setbits |= REG2_AA_FILTER_BW_50HZ_A;
_accel_onchip_filter_bandwith = 50;
} else if (bandwidth <= 194) {
setbits |= REG2_AA_FILTER_BW_194HZ_A;
_accel_onchip_filter_bandwith = 194;
} else if (bandwidth <= 362) {
setbits |= REG2_AA_FILTER_BW_362HZ_A;
_accel_onchip_filter_bandwith = 362;
} else if (bandwidth <= 773) {
setbits |= REG2_AA_FILTER_BW_773HZ_A;
_accel_onchip_filter_bandwith = 773;
} else {
return -EINVAL;
}
modify_reg(ADDR_CTRL_REG2, clearbits, setbits);
return OK;
}
int
LSM303D::accel_set_driver_lowpass_filter(float samplerate, float bandwidth)
{
_accel_filter_x.set_cutoff_frequency(samplerate, bandwidth);
_accel_filter_y.set_cutoff_frequency(samplerate, bandwidth);
_accel_filter_z.set_cutoff_frequency(samplerate, bandwidth);
return OK;
}
int
LSM303D::accel_set_samplerate(unsigned frequency)
{
uint8_t setbits = 0;
uint8_t clearbits = REG1_RATE_BITS_A;
if (frequency == 0 || frequency == ACCEL_SAMPLERATE_DEFAULT) {
frequency = 1600;
}
if (frequency <= 100) {
setbits |= REG1_RATE_100HZ_A;
_accel_samplerate = 100;
} else if (frequency <= 200) {
setbits |= REG1_RATE_200HZ_A;
_accel_samplerate = 200;
} else if (frequency <= 400) {
setbits |= REG1_RATE_400HZ_A;
_accel_samplerate = 400;
} else if (frequency <= 800) {
setbits |= REG1_RATE_800HZ_A;
_accel_samplerate = 800;
} else if (frequency <= 1600) {
setbits |= REG1_RATE_1600HZ_A;
_accel_samplerate = 1600;
} else {
return -EINVAL;
}
modify_reg(ADDR_CTRL_REG1, clearbits, setbits);
return OK;
}
int
LSM303D::mag_set_samplerate(unsigned frequency)
{
uint8_t setbits = 0;
uint8_t clearbits = REG5_RATE_BITS_M;
if (frequency == 0) {
frequency = 100;
}
if (frequency <= 25) {
setbits |= REG5_RATE_25HZ_M;
_mag_samplerate = 25;
} else if (frequency <= 50) {
setbits |= REG5_RATE_50HZ_M;
_mag_samplerate = 50;
} else if (frequency <= 100) {
setbits |= REG5_RATE_100HZ_M;
_mag_samplerate = 100;
} else {
return -EINVAL;
}
modify_reg(ADDR_CTRL_REG5, clearbits, setbits);
return OK;
}
void
LSM303D::start()
{
/* make sure we are stopped first */
stop();
/* reset the report ring */
_accel_reports->flush();
_mag_reports->flush();
/* start polling at the specified rate */
hrt_call_every(&_accel_call,
1000,
_call_accel_interval - LSM303D_TIMER_REDUCTION,
(hrt_callout)&LSM303D::measure_trampoline, this);
hrt_call_every(&_mag_call, 1000, _call_mag_interval, (hrt_callout)&LSM303D::mag_measure_trampoline, this);
}
void
LSM303D::stop()
{
hrt_cancel(&_accel_call);
hrt_cancel(&_mag_call);
/* reset internal states */
memset(_last_accel, 0, sizeof(_last_accel));
/* discard unread data in the buffers */
_accel_reports->flush();
_mag_reports->flush();
}
void
LSM303D::measure_trampoline(void *arg)
{
LSM303D *dev = (LSM303D *)arg;
/* make another measurement */
dev->measure();
}
void
LSM303D::mag_measure_trampoline(void *arg)
{
LSM303D *dev = (LSM303D *)arg;
/* make another measurement */
dev->mag_measure();
}
void
LSM303D::check_registers(void)
{
uint8_t v;
if ((v = read_reg(_checked_registers[_checked_next])) != _checked_values[_checked_next]) {
/*
if we get the wrong value then we know the SPI bus
or sensor is very sick. We set _register_wait to 20
and wait until we have seen 20 good values in a row
before we consider the sensor to be OK again.
*/
perf_count(_bad_registers);
/*
try to fix the bad register value. We only try to
fix one per loop to prevent a bad sensor hogging the
bus. We skip zero as that is the WHO_AM_I, which
is not writeable
*/
if (_checked_next != 0) {
write_reg(_checked_registers[_checked_next], _checked_values[_checked_next]);
}
_register_wait = 20;
}
_checked_next = (_checked_next + 1) % LSM303D_NUM_CHECKED_REGISTERS;
}
void
LSM303D::measure()
{
/* status register and data as read back from the device */
#pragma pack(push, 1)
struct {
uint8_t cmd;
uint8_t status;
int16_t x;
int16_t y;
int16_t z;
} raw_accel_report;
#pragma pack(pop)
accel_report accel_report;
/* start the performance counter */
perf_begin(_accel_sample_perf);
check_registers();
if (_register_wait != 0) {
// we are waiting for some good transfers before using
// the sensor again.
_register_wait--;
perf_end(_accel_sample_perf);
return;
}
/* fetch data from the sensor */
memset(&raw_accel_report, 0, sizeof(raw_accel_report));
raw_accel_report.cmd = ADDR_STATUS_A | DIR_READ | ADDR_INCREMENT;
transfer((uint8_t *)&raw_accel_report, (uint8_t *)&raw_accel_report, sizeof(raw_accel_report));
if (!(raw_accel_report.status & REG_STATUS_A_NEW_ZYXADA)) {
perf_end(_accel_sample_perf);
perf_count(_accel_duplicates);
return;
}
/*
* 1) Scale raw value to SI units using scaling from datasheet.
* 2) Subtract static offset (in SI units)
* 3) Scale the statically calibrated values with a linear
* dynamically obtained factor
*
* Note: the static sensor offset is the number the sensor outputs
* at a nominally 'zero' input. Therefore the offset has to
* be subtracted.
*
* Example: A gyro outputs a value of 74 at zero angular rate
* the offset is 74 from the origin and subtracting
* 74 from all measurements centers them around zero.
*/
accel_report.timestamp = hrt_absolute_time();
#if defined(CONFIG_ARCH_BOARD_MINDPX_V2)
int16_t tx = raw_accel_report.y;
int16_t ty = raw_accel_report.x;
int16_t tz = -raw_accel_report.z;
raw_accel_report.x = tx;
raw_accel_report.y = ty;
raw_accel_report.z = tz;
#endif
// use the temperature from the last mag reading
accel_report.temperature = _last_temperature;
// report the error count as the sum of the number of bad
// register reads and bad values. This allows the higher level
// code to decide if it should use this sensor based on
// whether it has had failures
accel_report.error_count = perf_event_count(_bad_registers) + perf_event_count(_bad_values);
accel_report.x_raw = raw_accel_report.x;
accel_report.y_raw = raw_accel_report.y;
accel_report.z_raw = raw_accel_report.z;
float xraw_f = raw_accel_report.x;
float yraw_f = raw_accel_report.y;
float zraw_f = raw_accel_report.z;
// apply user specified rotation
rotate_3f(_rotation, xraw_f, yraw_f, zraw_f);
float x_in_new = ((xraw_f * _accel_range_scale) - _accel_scale.x_offset) * _accel_scale.x_scale;
float y_in_new = ((yraw_f * _accel_range_scale) - _accel_scale.y_offset) * _accel_scale.y_scale;
float z_in_new = ((zraw_f * _accel_range_scale) - _accel_scale.z_offset) * _accel_scale.z_scale;
/*
we have logs where the accelerometers get stuck at a fixed
large value. We want to detect this and mark the sensor as
being faulty
*/
if (fabsf(_last_accel[0] - x_in_new) < 0.001f &&
fabsf(_last_accel[1] - y_in_new) < 0.001f &&
fabsf(_last_accel[2] - z_in_new) < 0.001f &&
fabsf(x_in_new) > 20 &&
fabsf(y_in_new) > 20 &&
fabsf(z_in_new) > 20) {
_constant_accel_count += 1;
} else {
_constant_accel_count = 0;
}
if (_constant_accel_count > 100) {
// we've had 100 constant accel readings with large
// values. The sensor is almost certainly dead. We
// will raise the error_count so that the top level
// flight code will know to avoid this sensor, but
// we'll still give the data so that it can be logged
// and viewed
perf_count(_bad_values);
_constant_accel_count = 0;
}
_last_accel[0] = x_in_new;
_last_accel[1] = y_in_new;
_last_accel[2] = z_in_new;
accel_report.x = _accel_filter_x.apply(x_in_new);
accel_report.y = _accel_filter_y.apply(y_in_new);
accel_report.z = _accel_filter_z.apply(z_in_new);
math::Vector<3> aval(x_in_new, y_in_new, z_in_new);
math::Vector<3> aval_integrated;
bool accel_notify = _accel_int.put(accel_report.timestamp, aval, aval_integrated, accel_report.integral_dt);
accel_report.x_integral = aval_integrated(0);
accel_report.y_integral = aval_integrated(1);
accel_report.z_integral = aval_integrated(2);
accel_report.scaling = _accel_range_scale;
accel_report.range_m_s2 = _accel_range_m_s2;
_accel_reports->force(&accel_report);
/* notify anyone waiting for data */
if (accel_notify) {
poll_notify(POLLIN);
if (!(_pub_blocked)) {
/* publish it */
orb_publish(ORB_ID(sensor_accel), _accel_topic, &accel_report);
}
}
_accel_read++;
/* stop the perf counter */
perf_end(_accel_sample_perf);
}
void
LSM303D::mag_measure()
{
/* status register and data as read back from the device */
#pragma pack(push, 1)
struct {
uint8_t cmd;
int16_t temperature;
uint8_t status;
int16_t x;
int16_t y;
int16_t z;
} raw_mag_report;
#pragma pack(pop)
mag_report mag_report;
memset(&mag_report, 0, sizeof(mag_report));
/* start the performance counter */
perf_begin(_mag_sample_perf);
/* fetch data from the sensor */
memset(&raw_mag_report, 0, sizeof(raw_mag_report));
raw_mag_report.cmd = ADDR_OUT_TEMP_L | DIR_READ | ADDR_INCREMENT;
transfer((uint8_t *)&raw_mag_report, (uint8_t *)&raw_mag_report, sizeof(raw_mag_report));
/*
* 1) Scale raw value to SI units using scaling from datasheet.
* 2) Subtract static offset (in SI units)
* 3) Scale the statically calibrated values with a linear
* dynamically obtained factor
*
* Note: the static sensor offset is the number the sensor outputs
* at a nominally 'zero' input. Therefore the offset has to
* be subtracted.
*
* Example: A gyro outputs a value of 74 at zero angular rate
* the offset is 74 from the origin and subtracting
* 74 from all measurements centers them around zero.
*/
mag_report.timestamp = hrt_absolute_time();
#if defined(CONFIG_ARCH_BOARD_MINDPX_V2)
int16_t tx = raw_mag_report.y;
int16_t ty = raw_mag_report.x;
int16_t tz = -raw_mag_report.z;
raw_mag_report.x = tx;
raw_mag_report.y = ty;
raw_mag_report.z = tz;
#endif
mag_report.x_raw = raw_mag_report.x;
mag_report.y_raw = raw_mag_report.y;
mag_report.z_raw = raw_mag_report.z;
float xraw_f = mag_report.x_raw;
float yraw_f = mag_report.y_raw;
float zraw_f = mag_report.z_raw;
/* apply user specified rotation */
rotate_3f(_rotation, xraw_f, yraw_f, zraw_f);
mag_report.x = ((xraw_f * _mag_range_scale) - _mag_scale.x_offset) * _mag_scale.x_scale;
mag_report.y = ((yraw_f * _mag_range_scale) - _mag_scale.y_offset) * _mag_scale.y_scale;
mag_report.z = ((zraw_f * _mag_range_scale) - _mag_scale.z_offset) * _mag_scale.z_scale;
mag_report.scaling = _mag_range_scale;
mag_report.range_ga = (float)_mag_range_ga;
mag_report.error_count = perf_event_count(_bad_registers) + perf_event_count(_bad_values);
/* remember the temperature. The datasheet isn't clear, but it
* seems to be a signed offset from 25 degrees C in units of 0.125C
*/
_last_temperature = 25 + (raw_mag_report.temperature * 0.125f);
mag_report.temperature = _last_temperature;
_mag_reports->force(&mag_report);
/* notify anyone waiting for data */
poll_notify(POLLIN);
if (!(_pub_blocked)) {
/* publish it */
orb_publish(ORB_ID(sensor_mag), _mag->_mag_topic, &mag_report);
}
_mag_read++;
/* stop the perf counter */
perf_end(_mag_sample_perf);
}
void
LSM303D::print_info()
{
printf("accel reads: %u\n", _accel_read);
printf("mag reads: %u\n", _mag_read);
perf_print_counter(_accel_sample_perf);
perf_print_counter(_mag_sample_perf);
perf_print_counter(_bad_registers);
perf_print_counter(_bad_values);
perf_print_counter(_accel_duplicates);
_accel_reports->print_info("accel reports");
_mag_reports->print_info("mag reports");
::printf("checked_next: %u\n", _checked_next);
for (uint8_t i = 0; i < LSM303D_NUM_CHECKED_REGISTERS; i++) {
uint8_t v = read_reg(_checked_registers[i]);
if (v != _checked_values[i]) {
::printf("reg %02x:%02x should be %02x\n",
(unsigned)_checked_registers[i],
(unsigned)v,
(unsigned)_checked_values[i]);
}
}
::printf("temperature: %.2f\n", (double)_last_temperature);
}
void
LSM303D::print_registers()
{
const struct {
uint8_t reg;
const char *name;
} regmap[] = {
{ ADDR_WHO_AM_I, "WHO_AM_I" },
{ 0x02, "I2C_CONTROL1" },
{ 0x15, "I2C_CONTROL2" },
{ ADDR_STATUS_A, "STATUS_A" },
{ ADDR_STATUS_M, "STATUS_M" },
{ ADDR_CTRL_REG0, "CTRL_REG0" },
{ ADDR_CTRL_REG1, "CTRL_REG1" },
{ ADDR_CTRL_REG2, "CTRL_REG2" },
{ ADDR_CTRL_REG3, "CTRL_REG3" },
{ ADDR_CTRL_REG4, "CTRL_REG4" },
{ ADDR_CTRL_REG5, "CTRL_REG5" },
{ ADDR_CTRL_REG6, "CTRL_REG6" },
{ ADDR_CTRL_REG7, "CTRL_REG7" },
{ ADDR_OUT_TEMP_L, "TEMP_L" },
{ ADDR_OUT_TEMP_H, "TEMP_H" },
{ ADDR_INT_CTRL_M, "INT_CTRL_M" },
{ ADDR_INT_SRC_M, "INT_SRC_M" },
{ ADDR_REFERENCE_X, "REFERENCE_X" },
{ ADDR_REFERENCE_Y, "REFERENCE_Y" },
{ ADDR_REFERENCE_Z, "REFERENCE_Z" },
{ ADDR_OUT_X_L_A, "ACCEL_XL" },
{ ADDR_OUT_X_H_A, "ACCEL_XH" },
{ ADDR_OUT_Y_L_A, "ACCEL_YL" },
{ ADDR_OUT_Y_H_A, "ACCEL_YH" },
{ ADDR_OUT_Z_L_A, "ACCEL_ZL" },
{ ADDR_OUT_Z_H_A, "ACCEL_ZH" },
{ ADDR_FIFO_CTRL, "FIFO_CTRL" },
{ ADDR_FIFO_SRC, "FIFO_SRC" },
{ ADDR_IG_CFG1, "IG_CFG1" },
{ ADDR_IG_SRC1, "IG_SRC1" },
{ ADDR_IG_THS1, "IG_THS1" },
{ ADDR_IG_DUR1, "IG_DUR1" },
{ ADDR_IG_CFG2, "IG_CFG2" },
{ ADDR_IG_SRC2, "IG_SRC2" },
{ ADDR_IG_THS2, "IG_THS2" },
{ ADDR_IG_DUR2, "IG_DUR2" },
{ ADDR_CLICK_CFG, "CLICK_CFG" },
{ ADDR_CLICK_SRC, "CLICK_SRC" },
{ ADDR_CLICK_THS, "CLICK_THS" },
{ ADDR_TIME_LIMIT, "TIME_LIMIT" },
{ ADDR_TIME_LATENCY, "TIME_LATENCY" },
{ ADDR_TIME_WINDOW, "TIME_WINDOW" },
{ ADDR_ACT_THS, "ACT_THS" },
{ ADDR_ACT_DUR, "ACT_DUR" }
};
for (uint8_t i = 0; i < sizeof(regmap) / sizeof(regmap[0]); i++) {
printf("0x%02x %s\n", read_reg(regmap[i].reg), regmap[i].name);
}
}
void
LSM303D::test_error()
{
// trigger an error
write_reg(ADDR_CTRL_REG3, 0);
}
LSM303D_mag::LSM303D_mag(LSM303D *parent) :
CDev("LSM303D_mag", LSM303D_DEVICE_PATH_MAG),
_parent(parent),
_mag_topic(nullptr),
_mag_orb_class_instance(-1),
_mag_class_instance(-1)
{
}
LSM303D_mag::~LSM303D_mag()
{
if (_mag_class_instance != -1) {
unregister_class_devname(MAG_BASE_DEVICE_PATH, _mag_class_instance);
}
}
int
LSM303D_mag::init()
{
int ret;
ret = CDev::init();
if (ret != OK) {
goto out;
}
_mag_class_instance = register_class_devname(MAG_BASE_DEVICE_PATH);
out:
return ret;
}
void
LSM303D_mag::parent_poll_notify()
{
poll_notify(POLLIN);
}
ssize_t
LSM303D_mag::read(struct file *filp, char *buffer, size_t buflen)
{
return _parent->mag_read(filp, buffer, buflen);
}
int
LSM303D_mag::ioctl(struct file *filp, int cmd, unsigned long arg)
{
switch (cmd) {
case DEVIOCGDEVICEID:
return (int)CDev::ioctl(filp, cmd, arg);
break;
default:
return _parent->mag_ioctl(filp, cmd, arg);
}
}
void
LSM303D_mag::measure()
{
_parent->mag_measure();
}
void
LSM303D_mag::measure_trampoline(void *arg)
{
_parent->mag_measure_trampoline(arg);
}
/**
* Local functions in support of the shell command.
*/
namespace lsm303d
{
LSM303D *g_dev;
void start(bool external_bus, enum Rotation rotation, unsigned range);
void test();
void reset();
void info();
void regdump();
void usage();
void test_error();
/**
* Start the driver.
*
* This function call only returns once the driver is
* up and running or failed to detect the sensor.
*/
void
start(bool external_bus, enum Rotation rotation, unsigned range)
{
int fd, fd_mag;
if (g_dev != nullptr) {
errx(0, "already started");
}
/* create the driver */
if (external_bus) {
#if defined(PX4_SPI_BUS_EXT) && defined(PX4_SPIDEV_EXT_ACCEL_MAG)
g_dev = new LSM303D(PX4_SPI_BUS_EXT, LSM303D_DEVICE_PATH_ACCEL, (spi_dev_e)PX4_SPIDEV_EXT_ACCEL_MAG, rotation);
#else
errx(0, "External SPI not available");
#endif
} else {
g_dev = new LSM303D(PX4_SPI_BUS_SENSORS, LSM303D_DEVICE_PATH_ACCEL, (spi_dev_e)PX4_SPIDEV_ACCEL_MAG, rotation);
}
if (g_dev == nullptr) {
warnx("failed instantiating LSM303D obj");
goto fail;
}
if (OK != g_dev->init()) {
goto fail;
}
/* set the poll rate to default, starts automatic data collection */
fd = open(LSM303D_DEVICE_PATH_ACCEL, O_RDONLY);
if (fd < 0) {
goto fail;
}
if (ioctl(fd, SENSORIOCSPOLLRATE, SENSOR_POLLRATE_DEFAULT) < 0) {
goto fail;
}
if (ioctl(fd, ACCELIOCSRANGE, range) < 0) {
goto fail;
}
fd_mag = open(LSM303D_DEVICE_PATH_MAG, O_RDONLY);
/* don't fail if open cannot be opened */
if (0 <= fd_mag) {
if (ioctl(fd_mag, SENSORIOCSPOLLRATE, SENSOR_POLLRATE_DEFAULT) < 0) {
goto fail;
}
}
close(fd);
close(fd_mag);
exit(0);
fail:
if (g_dev != nullptr) {
delete g_dev;
g_dev = nullptr;
}
errx(1, "driver start failed");
}
/**
* Perform some basic functional tests on the driver;
* make sure we can collect data from the sensor in polled
* and automatic modes.
*/
void
test()
{
int fd_accel = -1;
struct accel_report accel_report;
ssize_t sz;
int ret;
/* get the driver */
fd_accel = open(LSM303D_DEVICE_PATH_ACCEL, O_RDONLY);
if (fd_accel < 0) {
err(1, "%s open failed", LSM303D_DEVICE_PATH_ACCEL);
}
/* do a simple demand read */
sz = read(fd_accel, &accel_report, sizeof(accel_report));
if (sz != sizeof(accel_report)) {
err(1, "immediate read failed");
}
warnx("accel x: \t% 9.5f\tm/s^2", (double)accel_report.x);
warnx("accel y: \t% 9.5f\tm/s^2", (double)accel_report.y);
warnx("accel z: \t% 9.5f\tm/s^2", (double)accel_report.z);
warnx("accel x: \t%d\traw", (int)accel_report.x_raw);
warnx("accel y: \t%d\traw", (int)accel_report.y_raw);
warnx("accel z: \t%d\traw", (int)accel_report.z_raw);
warnx("accel range: %8.4f m/s^2", (double)accel_report.range_m_s2);
if (ERROR == (ret = ioctl(fd_accel, ACCELIOCGLOWPASS, 0))) {
warnx("accel antialias filter bandwidth: fail");
} else {
warnx("accel antialias filter bandwidth: %d Hz", ret);
}
int fd_mag = -1;
struct mag_report m_report;
/* get the driver */
fd_mag = open(LSM303D_DEVICE_PATH_MAG, O_RDONLY);
if (fd_mag < 0) {
err(1, "%s open failed", LSM303D_DEVICE_PATH_MAG);
}
/* check if mag is onboard or external */
if ((ret = ioctl(fd_mag, MAGIOCGEXTERNAL, 0)) < 0) {
errx(1, "failed to get if mag is onboard or external");
}
warnx("mag device active: %s", ret ? "external" : "onboard");
/* do a simple demand read */
sz = read(fd_mag, &m_report, sizeof(m_report));
if (sz != sizeof(m_report)) {
err(1, "immediate read failed");
}
warnx("mag x: \t% 9.5f\tga", (double)m_report.x);
warnx("mag y: \t% 9.5f\tga", (double)m_report.y);
warnx("mag z: \t% 9.5f\tga", (double)m_report.z);
warnx("mag x: \t%d\traw", (int)m_report.x_raw);
warnx("mag y: \t%d\traw", (int)m_report.y_raw);
warnx("mag z: \t%d\traw", (int)m_report.z_raw);
warnx("mag range: %8.4f ga", (double)m_report.range_ga);
/* reset to default polling */
if (ioctl(fd_accel, SENSORIOCSPOLLRATE, SENSOR_POLLRATE_DEFAULT) < 0) {
err(1, "reset to default polling");
}
close(fd_accel);
close(fd_mag);
reset();
errx(0, "PASS");
}
/**
* Reset the driver.
*/
void
reset()
{
int fd = open(LSM303D_DEVICE_PATH_ACCEL, O_RDONLY);
if (fd < 0) {
err(1, "failed ");
}
if (ioctl(fd, SENSORIOCRESET, 0) < 0) {
err(1, "driver reset failed");
}
if (ioctl(fd, SENSORIOCSPOLLRATE, SENSOR_POLLRATE_DEFAULT) < 0) {
err(1, "accel pollrate reset failed");
}
close(fd);
fd = open(LSM303D_DEVICE_PATH_MAG, O_RDONLY);
if (fd < 0) {
warnx("mag could not be opened, external mag might be used");
} else {
/* no need to reset the mag as well, the reset() is the same */
if (ioctl(fd, SENSORIOCSPOLLRATE, SENSOR_POLLRATE_DEFAULT) < 0) {
err(1, "mag pollrate reset failed");
}
}
close(fd);
exit(0);
}
/**
* Print a little info about the driver.
*/
void
info()
{
if (g_dev == nullptr) {
errx(1, "driver not running\n");
}
printf("state @ %p\n", g_dev);
g_dev->print_info();
exit(0);
}
/**
* dump registers from device
*/
void
regdump()
{
if (g_dev == nullptr) {
errx(1, "driver not running\n");
}
printf("regdump @ %p\n", g_dev);
g_dev->print_registers();
exit(0);
}
/**
* trigger an error
*/
void
test_error()
{
if (g_dev == nullptr) {
errx(1, "driver not running\n");
}
g_dev->test_error();
exit(0);
}
void
usage()
{
warnx("missing command: try 'start', 'info', 'test', 'reset', 'testerror' or 'regdump'");
warnx("options:");
warnx(" -X (external bus)");
warnx(" -R rotation");
}
} // namespace
int
lsm303d_main(int argc, char *argv[])
{
bool external_bus = false;
int ch;
enum Rotation rotation = ROTATION_NONE;
int accel_range = 8;
/* jump over start/off/etc and look at options first */
while ((ch = getopt(argc, argv, "XR:a:")) != EOF) {
switch (ch) {
case 'X':
external_bus = true;
break;
case 'R':
rotation = (enum Rotation)atoi(optarg);
break;
case 'a':
accel_range = atoi(optarg);
break;
default:
lsm303d::usage();
exit(0);
}
}
const char *verb = argv[optind];
/*
* Start/load the driver.
*/
if (!strcmp(verb, "start")) {
lsm303d::start(external_bus, rotation, accel_range);
}
/*
* Test the driver/device.
*/
if (!strcmp(verb, "test")) {
lsm303d::test();
}
/*
* Reset the driver.
*/
if (!strcmp(verb, "reset")) {
lsm303d::reset();
}
/*
* Print driver information.
*/
if (!strcmp(verb, "info")) {
lsm303d::info();
}
/*
* dump device registers
*/
if (!strcmp(verb, "regdump")) {
lsm303d::regdump();
}
/*
* trigger an error
*/
if (!strcmp(verb, "testerror")) {
lsm303d::test_error();
}
errx(1, "unrecognized command, try 'start', 'test', 'reset', 'info', 'testerror' or 'regdump'");
}