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ardupilot/libraries/AP_InertialSensor/AP_InertialSensor_MPU6000.cpp
Lucas De Marchi 469efb00f6 AP_InertialSensor: save id for gyro and accel instances 
This allows each sensor to be uniquely identified in the system by using
either the index inside the backend or for those that use the Device
interface, to use the bus type, location, and device id.

We leave 16-bit for each sensor to be able to change its own
identification in future, which allows them to be changed in an
incompatible manner forcing a re-calibration.
2016-11-09 17:08:05 +11:00

869 lines
32 KiB
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#include <assert.h>
#include <utility>
#include <AP_HAL/AP_HAL.h>
#include "AP_InertialSensor_MPU6000.h"
extern const AP_HAL::HAL& hal;
// MPU6000 accelerometer scaling
#define MPU6000_ACCEL_SCALE_1G (GRAVITY_MSS / 4096.0f)
#if CONFIG_HAL_BOARD == HAL_BOARD_LINUX
#include <AP_HAL_Linux/GPIO.h>
#if CONFIG_HAL_BOARD_SUBTYPE == HAL_BOARD_SUBTYPE_LINUX_ERLEBOARD || CONFIG_HAL_BOARD_SUBTYPE == HAL_BOARD_SUBTYPE_LINUX_PXF
#define MPU6000_DRDY_PIN BBB_P8_14
#elif CONFIG_HAL_BOARD_SUBTYPE == HAL_BOARD_SUBTYPE_LINUX_RASPILOT
#define MPU6000_DRDY_PIN RPI_GPIO_24
#elif CONFIG_HAL_BOARD_SUBTYPE == HAL_BOARD_SUBTYPE_LINUX_MINLURE
#define MPU6000_DRDY_PIN MINNOW_GPIO_I2S_CLK
#elif CONFIG_HAL_BOARD_SUBTYPE == HAL_BOARD_SUBTYPE_LINUX_DISCO || CONFIG_HAL_BOARD_SUBTYPE == HAL_BOARD_SUBTYPE_LINUX_BEBOP
#define MPU6000_EXT_SYNC_ENABLE 1
#endif
#endif
/*
EXT_SYNC allows for frame synchronisation with an external device
such as a camera. When enabled the LSB of AccelZ holds the FSYNC bit
*/
#ifndef MPU6000_EXT_SYNC_ENABLE
#define MPU6000_EXT_SYNC_ENABLE 0
#endif
// MPU 6000 registers
#define MPUREG_XG_OFFS_TC 0x00
#define MPUREG_YG_OFFS_TC 0x01
#define MPUREG_ZG_OFFS_TC 0x02
#define MPUREG_X_FINE_GAIN 0x03
#define MPUREG_Y_FINE_GAIN 0x04
#define MPUREG_Z_FINE_GAIN 0x05
#define MPUREG_XA_OFFS_H 0x06 // X axis accelerometer offset (high byte)
#define MPUREG_XA_OFFS_L 0x07 // X axis accelerometer offset (low byte)
#define MPUREG_YA_OFFS_H 0x08 // Y axis accelerometer offset (high byte)
#define MPUREG_YA_OFFS_L 0x09 // Y axis accelerometer offset (low byte)
#define MPUREG_ZA_OFFS_H 0x0A // Z axis accelerometer offset (high byte)
#define MPUREG_ZA_OFFS_L 0x0B // Z axis accelerometer offset (low byte)
#define MPUREG_PRODUCT_ID 0x0C // Product ID Register
#define MPUREG_XG_OFFS_USRH 0x13 // X axis gyro offset (high byte)
#define MPUREG_XG_OFFS_USRL 0x14 // X axis gyro offset (low byte)
#define MPUREG_YG_OFFS_USRH 0x15 // Y axis gyro offset (high byte)
#define MPUREG_YG_OFFS_USRL 0x16 // Y axis gyro offset (low byte)
#define MPUREG_ZG_OFFS_USRH 0x17 // Z axis gyro offset (high byte)
#define MPUREG_ZG_OFFS_USRL 0x18 // Z axis gyro offset (low byte)
#define MPUREG_SMPLRT_DIV 0x19 // sample rate. Fsample= 1Khz/(<this value>+1) = 200Hz
# define MPUREG_SMPLRT_1000HZ 0x00
# define MPUREG_SMPLRT_500HZ 0x01
# define MPUREG_SMPLRT_250HZ 0x03
# define MPUREG_SMPLRT_200HZ 0x04
# define MPUREG_SMPLRT_100HZ 0x09
# define MPUREG_SMPLRT_50HZ 0x13
#define MPUREG_CONFIG 0x1A
# define MPUREG_CONFIG_EXT_SYNC_SHIFT 3
# define MPUREG_CONFIG_EXT_SYNC_GX 0x02
# define MPUREG_CONFIG_EXT_SYNC_GY 0x03
# define MPUREG_CONFIG_EXT_SYNC_GZ 0x04
# define MPUREG_CONFIG_EXT_SYNC_AX 0x05
# define MPUREG_CONFIG_EXT_SYNC_AY 0x06
# define MPUREG_CONFIG_EXT_SYNC_AZ 0x07
#define MPUREG_GYRO_CONFIG 0x1B
// bit definitions for MPUREG_GYRO_CONFIG
# define BITS_GYRO_FS_250DPS 0x00
# define BITS_GYRO_FS_500DPS 0x08
# define BITS_GYRO_FS_1000DPS 0x10
# define BITS_GYRO_FS_2000DPS 0x18
# define BITS_GYRO_FS_MASK 0x18 // only bits 3 and 4 are used for gyro full scale so use this to mask off other bits
# define BITS_GYRO_ZGYRO_SELFTEST 0x20
# define BITS_GYRO_YGYRO_SELFTEST 0x40
# define BITS_GYRO_XGYRO_SELFTEST 0x80
#define MPUREG_ACCEL_CONFIG 0x1C
#define MPUREG_MOT_THR 0x1F // detection threshold for Motion interrupt generation. Motion is detected when the absolute value of any of the accelerometer measurements exceeds this
#define MPUREG_MOT_DUR 0x20 // duration counter threshold for Motion interrupt generation. The duration counter ticks at 1 kHz, therefore MOT_DUR has a unit of 1 LSB = 1 ms
#define MPUREG_ZRMOT_THR 0x21 // detection threshold for Zero Motion interrupt generation.
#define MPUREG_ZRMOT_DUR 0x22 // duration counter threshold for Zero Motion interrupt generation. The duration counter ticks at 16 Hz, therefore ZRMOT_DUR has a unit of 1 LSB = 64 ms.
#define MPUREG_FIFO_EN 0x23
# define BIT_TEMP_FIFO_EN 0x80
# define BIT_XG_FIFO_EN 0x40
# define BIT_YG_FIFO_EN 0x20
# define BIT_ZG_FIFO_EN 0x10
# define BIT_ACCEL_FIFO_EN 0x08
# define BIT_SLV2_FIFO_EN 0x04
# define BIT_SLV1_FIFO_EN 0x02
# define BIT_SLV0_FIFI_EN0 0x01
#define MPUREG_I2C_MST_CTRL 0x24
# define BIT_I2C_MST_P_NSR 0x10
# define BIT_I2C_MST_CLK_400KHZ 0x0D
#define MPUREG_I2C_SLV0_ADDR 0x25
#define MPUREG_I2C_SLV1_ADDR 0x28
#define MPUREG_I2C_SLV2_ADDR 0x2B
#define MPUREG_I2C_SLV3_ADDR 0x2E
#define MPUREG_INT_PIN_CFG 0x37
# define BIT_INT_RD_CLEAR 0x10 // clear the interrupt when any read occurs
# define BIT_LATCH_INT_EN 0x20 // latch data ready pin
#define MPUREG_I2C_SLV4_CTRL 0x34
#define MPUREG_INT_ENABLE 0x38
// bit definitions for MPUREG_INT_ENABLE
# define BIT_RAW_RDY_EN 0x01
# define BIT_DMP_INT_EN 0x02 // enabling this bit (DMP_INT_EN) also enables RAW_RDY_EN it seems
# define BIT_UNKNOWN_INT_EN 0x04
# define BIT_I2C_MST_INT_EN 0x08
# define BIT_FIFO_OFLOW_EN 0x10
# define BIT_ZMOT_EN 0x20
# define BIT_MOT_EN 0x40
# define BIT_FF_EN 0x80
#define MPUREG_INT_STATUS 0x3A
// bit definitions for MPUREG_INT_STATUS (same bit pattern as above because this register shows what interrupt actually fired)
# define BIT_RAW_RDY_INT 0x01
# define BIT_DMP_INT 0x02
# define BIT_UNKNOWN_INT 0x04
# define BIT_I2C_MST_INT 0x08
# define BIT_FIFO_OFLOW_INT 0x10
# define BIT_ZMOT_INT 0x20
# define BIT_MOT_INT 0x40
# define BIT_FF_INT 0x80
#define MPUREG_ACCEL_XOUT_H 0x3B
#define MPUREG_ACCEL_XOUT_L 0x3C
#define MPUREG_ACCEL_YOUT_H 0x3D
#define MPUREG_ACCEL_YOUT_L 0x3E
#define MPUREG_ACCEL_ZOUT_H 0x3F
#define MPUREG_ACCEL_ZOUT_L 0x40
#define MPUREG_TEMP_OUT_H 0x41
#define MPUREG_TEMP_OUT_L 0x42
#define MPUREG_GYRO_XOUT_H 0x43
#define MPUREG_GYRO_XOUT_L 0x44
#define MPUREG_GYRO_YOUT_H 0x45
#define MPUREG_GYRO_YOUT_L 0x46
#define MPUREG_GYRO_ZOUT_H 0x47
#define MPUREG_GYRO_ZOUT_L 0x48
#define MPUREG_EXT_SENS_DATA_00 0x49
#define MPUREG_I2C_SLV0_DO 0x63
#define MPUREG_I2C_MST_DELAY_CTRL 0x67
# define BIT_I2C_SLV0_DLY_EN 0x01
# define BIT_I2C_SLV1_DLY_EN 0x02
# define BIT_I2C_SLV2_DLY_EN 0x04
# define BIT_I2C_SLV3_DLY_EN 0x08
#define MPUREG_USER_CTRL 0x6A
// bit definitions for MPUREG_USER_CTRL
# define BIT_USER_CTRL_SIG_COND_RESET 0x01 // resets signal paths and results registers for all sensors (gyros, accel, temp)
# define BIT_USER_CTRL_I2C_MST_RESET 0x02 // reset I2C Master (only applicable if I2C_MST_EN bit is set)
# define BIT_USER_CTRL_FIFO_RESET 0x04 // Reset (i.e. clear) FIFO buffer
# define BIT_USER_CTRL_DMP_RESET 0x08 // Reset DMP
# define BIT_USER_CTRL_I2C_IF_DIS 0x10 // Disable primary I2C interface and enable hal.spi->interface
# define BIT_USER_CTRL_I2C_MST_EN 0x20 // Enable MPU to act as the I2C Master to external slave sensors
# define BIT_USER_CTRL_FIFO_EN 0x40 // Enable FIFO operations
# define BIT_USER_CTRL_DMP_EN 0x80 // Enable DMP operations
#define MPUREG_PWR_MGMT_1 0x6B
# define BIT_PWR_MGMT_1_CLK_INTERNAL 0x00 // clock set to internal 8Mhz oscillator
# define BIT_PWR_MGMT_1_CLK_XGYRO 0x01 // PLL with X axis gyroscope reference
# define BIT_PWR_MGMT_1_CLK_YGYRO 0x02 // PLL with Y axis gyroscope reference
# define BIT_PWR_MGMT_1_CLK_ZGYRO 0x03 // PLL with Z axis gyroscope reference
# define BIT_PWR_MGMT_1_CLK_EXT32KHZ 0x04 // PLL with external 32.768kHz reference
# define BIT_PWR_MGMT_1_CLK_EXT19MHZ 0x05 // PLL with external 19.2MHz reference
# define BIT_PWR_MGMT_1_CLK_STOP 0x07 // Stops the clock and keeps the timing generator in reset
# define BIT_PWR_MGMT_1_TEMP_DIS 0x08 // disable temperature sensor
# define BIT_PWR_MGMT_1_CYCLE 0x20 // put sensor into cycle mode. cycles between sleep mode and waking up to take a single sample of data from active sensors at a rate determined by LP_WAKE_CTRL
# define BIT_PWR_MGMT_1_SLEEP 0x40 // put sensor into low power sleep mode
# define BIT_PWR_MGMT_1_DEVICE_RESET 0x80 // reset entire device
#define MPUREG_PWR_MGMT_2 0x6C // allows the user to configure the frequency of wake-ups in Accelerometer Only Low Power Mode
#define MPUREG_BANK_SEL 0x6D // DMP bank selection register (used to indirectly access DMP registers)
#define MPUREG_MEM_START_ADDR 0x6E // DMP memory start address (used to indirectly write to dmp memory)
#define MPUREG_MEM_R_W 0x6F // DMP related register
#define MPUREG_DMP_CFG_1 0x70 // DMP related register
#define MPUREG_DMP_CFG_2 0x71 // DMP related register
#define MPUREG_FIFO_COUNTH 0x72
#define MPUREG_FIFO_COUNTL 0x73
#define MPUREG_FIFO_R_W 0x74
#define MPUREG_WHOAMI 0x75
#define BIT_READ_FLAG 0x80
#define BIT_I2C_SLVX_EN 0x80
// Configuration bits MPU 3000 and MPU 6000 (not revised)?
#define BITS_DLPF_CFG_256HZ_NOLPF2 0x00
#define BITS_DLPF_CFG_188HZ 0x01
#define BITS_DLPF_CFG_98HZ 0x02
#define BITS_DLPF_CFG_42HZ 0x03
#define BITS_DLPF_CFG_20HZ 0x04
#define BITS_DLPF_CFG_10HZ 0x05
#define BITS_DLPF_CFG_5HZ 0x06
#define BITS_DLPF_CFG_2100HZ_NOLPF 0x07
#define BITS_DLPF_CFG_MASK 0x07
// Product ID Description for MPU6000
// high 4 bits low 4 bits
// Product Name Product Revision
#define MPU6000ES_REV_C4 0x14 // 0001 0100
#define MPU6000ES_REV_C5 0x15 // 0001 0101
#define MPU6000ES_REV_D6 0x16 // 0001 0110
#define MPU6000ES_REV_D7 0x17 // 0001 0111
#define MPU6000ES_REV_D8 0x18 // 0001 1000
#define MPU6000_REV_C4 0x54 // 0101 0100
#define MPU6000_REV_C5 0x55 // 0101 0101
#define MPU6000_REV_D6 0x56 // 0101 0110
#define MPU6000_REV_D7 0x57 // 0101 0111
#define MPU6000_REV_D8 0x58 // 0101 1000
#define MPU6000_REV_D9 0x59 // 0101 1001
#define MPU6000_SAMPLE_SIZE 14
#if CONFIG_HAL_BOARD_SUBTYPE == HAL_BOARD_SUBTYPE_LINUX_BH
#define MPU6000_MAX_FIFO_SAMPLES 6
#else
#define MPU6000_MAX_FIFO_SAMPLES 3
#endif
#define MAX_DATA_READ (MPU6000_MAX_FIFO_SAMPLES * MPU6000_SAMPLE_SIZE)
#define int16_val(v, idx) ((int16_t)(((uint16_t)v[2*idx] << 8) | v[2*idx+1]))
#define uint16_val(v, idx)(((uint16_t)v[2*idx] << 8) | v[2*idx+1])
/*
* RM-MPU-6000A-00.pdf, page 33, section 4.25 lists LSB sensitivity of
* gyro as 16.4 LSB/DPS at scale factor of +/- 2000dps (FS_SEL==3)
*/
static const float GYRO_SCALE = (0.0174532f / 16.4f);
/*
* RM-MPU-6000A-00.pdf, page 31, section 4.23 lists LSB sensitivity of
* accel as 4096 LSB/mg at scale factor of +/- 8g (AFS_SEL==2)
*
* See note below about accel scaling of engineering sample MPU6k
* variants however
*/
AP_InertialSensor_MPU6000::AP_InertialSensor_MPU6000(AP_InertialSensor &imu,
AP_HAL::OwnPtr<AP_HAL::Device> dev,
bool use_fifo,
enum Rotation rotation)
: AP_InertialSensor_Backend(imu)
, _use_fifo(use_fifo)
, _temp_filter(1000, 1)
, _dev(std::move(dev))
, _rotation(rotation)
{
}
AP_InertialSensor_MPU6000::~AP_InertialSensor_MPU6000()
{
delete _auxiliary_bus;
}
AP_InertialSensor_Backend *AP_InertialSensor_MPU6000::probe(AP_InertialSensor &imu,
AP_HAL::OwnPtr<AP_HAL::I2CDevice> dev,
enum Rotation rotation)
{
AP_InertialSensor_MPU6000 *sensor =
new AP_InertialSensor_MPU6000(imu, std::move(dev), true, rotation);
if (!sensor || !sensor->_init()) {
delete sensor;
return nullptr;
}
sensor->_id = HAL_INS_MPU60XX_I2C;
return sensor;
}
AP_InertialSensor_Backend *AP_InertialSensor_MPU6000::probe(AP_InertialSensor &imu,
AP_HAL::OwnPtr<AP_HAL::SPIDevice> dev,
enum Rotation rotation)
{
AP_InertialSensor_MPU6000 *sensor;
dev->set_read_flag(0x80);
sensor = new AP_InertialSensor_MPU6000(imu, std::move(dev), false, rotation);
if (!sensor || !sensor->_init()) {
delete sensor;
return nullptr;
}
sensor->_id = HAL_INS_MPU60XX_SPI;
return sensor;
}
bool AP_InertialSensor_MPU6000::_init()
{
#ifdef MPU6000_DRDY_PIN
_drdy_pin = hal.gpio->channel(MPU6000_DRDY_PIN);
_drdy_pin->mode(HAL_GPIO_INPUT);
#endif
bool success = _hardware_init();
#if MPU6000_DEBUG
_dump_registers();
#endif
return success;
}
void AP_InertialSensor_MPU6000::_fifo_reset()
{
_register_write(MPUREG_USER_CTRL, 0);
_register_write(MPUREG_USER_CTRL, BIT_USER_CTRL_FIFO_RESET);
_register_write(MPUREG_USER_CTRL, BIT_USER_CTRL_FIFO_EN);
}
void AP_InertialSensor_MPU6000::_fifo_enable()
{
_register_write(MPUREG_FIFO_EN, BIT_XG_FIFO_EN | BIT_YG_FIFO_EN |
BIT_ZG_FIFO_EN | BIT_ACCEL_FIFO_EN | BIT_TEMP_FIFO_EN);
_fifo_reset();
hal.scheduler->delay(1);
}
bool AP_InertialSensor_MPU6000::_has_auxiliary_bus()
{
return _dev->bus_type() != AP_HAL::Device::BUS_TYPE_I2C;
}
void AP_InertialSensor_MPU6000::start()
{
if (!_dev->get_semaphore()->take(100)) {
AP_HAL::panic("MPU6000: Unable to get semaphore");
}
// initially run the bus at low speed
_dev->set_speed(AP_HAL::Device::SPEED_LOW);
// only used for wake-up in accelerometer only low power mode
_register_write(MPUREG_PWR_MGMT_2, 0x00);
hal.scheduler->delay(1);
if (_use_fifo) {
_fifo_enable();
}
// disable sensor filtering
_set_filter_register(256);
// set sample rate to 1000Hz and apply a software filter
// In this configuration, the gyro sample rate is 8kHz
// Therefore the sample rate value is 8kHz/(SMPLRT_DIV + 1)
// So we have to set it to 7 to have a 1kHz sampling
// rate on the gyro
_register_write(MPUREG_SMPLRT_DIV, 7);
hal.scheduler->delay(1);
// Gyro scale 2000º/s
_register_write(MPUREG_GYRO_CONFIG, BITS_GYRO_FS_2000DPS);
hal.scheduler->delay(1);
// read the product ID rev c has 1/2 the sensitivity of rev d
uint8_t product_id = _register_read(MPUREG_PRODUCT_ID);
//Serial.printf("Product_ID= 0x%x\n", (unsigned) _mpu6000_product_id);
// TODO: should be changed to 16G once we have a way to override the
// previous offsets
if ((product_id == MPU6000ES_REV_C4) ||
(product_id == MPU6000ES_REV_C5) ||
(product_id == MPU6000_REV_C4) ||
(product_id == MPU6000_REV_C5)) {
// Accel scale 8g (4096 LSB/g)
// Rev C has different scaling than rev D
_register_write(MPUREG_ACCEL_CONFIG,1<<3);
} else {
// Accel scale 8g (4096 LSB/g)
_register_write(MPUREG_ACCEL_CONFIG,2<<3);
}
hal.scheduler->delay(1);
// configure interrupt to fire when new data arrives
_register_write(MPUREG_INT_ENABLE, BIT_RAW_RDY_EN);
hal.scheduler->delay(1);
// clear interrupt on any read, and hold the data ready pin high
// until we clear the interrupt
_register_write(MPUREG_INT_PIN_CFG, BIT_INT_RD_CLEAR | BIT_LATCH_INT_EN);
// now that we have initialised, we set the bus speed to high
_dev->set_speed(AP_HAL::Device::SPEED_HIGH);
_dev->get_semaphore()->give();
// grab the used instances
_gyro_instance = _imu.register_gyro(1000, _dev->get_id());
_accel_instance = _imu.register_accel(1000, _dev->get_id());
// setup sensor rotations from probe()
set_gyro_orientation(_gyro_instance, _rotation);
set_accel_orientation(_accel_instance, _rotation);
// start the timer process to read samples
if (_dev->register_periodic_callback(1000, FUNCTOR_BIND_MEMBER(&AP_InertialSensor_MPU6000::_poll_data, bool)) == nullptr) {
// cope with AuxiliaryBus which does not support register_periodic_callback yet
hal.scheduler->register_timer_process(FUNCTOR_BIND_MEMBER(&AP_InertialSensor_MPU6000::_poll_data_timer, void));
}
}
/*
process any
*/
bool AP_InertialSensor_MPU6000::update()
{
update_accel(_accel_instance);
update_gyro(_gyro_instance);
_publish_temperature(_accel_instance, _temp_filtered);
return true;
}
AuxiliaryBus *AP_InertialSensor_MPU6000::get_auxiliary_bus()
{
if (_auxiliary_bus) {
return _auxiliary_bus;
}
if (_has_auxiliary_bus()) {
_auxiliary_bus = new AP_MPU6000_AuxiliaryBus(*this, _dev->get_bus_id());
}
return _auxiliary_bus;
}
/*
* Return true if the MPU6000 has new data available for reading.
*
* We use the data ready pin if it is available. Otherwise, read the
* status register.
*/
bool AP_InertialSensor_MPU6000::_data_ready()
{
if (_drdy_pin) {
return _drdy_pin->read() != 0;
}
uint8_t status = _register_read(MPUREG_INT_STATUS);
return (status & BIT_RAW_RDY_INT) != 0;
}
/*
* Timer process to poll for new data from the MPU6000. Called from bus thread with semaphore held
*/
bool AP_InertialSensor_MPU6000::_poll_data()
{
if (_use_fifo) {
_read_fifo();
} else if (_data_ready()) {
_read_sample();
}
return true;
}
/*
varient of _poll_data for systems where register_periodic_callback
fails. We need to handle the semaphore ourselves.
*/
void AP_InertialSensor_MPU6000::_poll_data_timer()
{
if (_dev->get_semaphore()->take_nonblocking()) {
_poll_data();
_dev->get_semaphore()->give();
}
}
void AP_InertialSensor_MPU6000::_accumulate(uint8_t *samples, uint8_t n_samples)
{
for (uint8_t i = 0; i < n_samples; i++) {
uint8_t *data = samples + MPU6000_SAMPLE_SIZE * i;
Vector3f accel, gyro;
float temp;
bool fsync_set = false;
#if MPU6000_EXT_SYNC_ENABLE
fsync_set = (int16_val(data, 2) & 1U) != 0;
#endif
accel = Vector3f(int16_val(data, 1),
int16_val(data, 0),
-int16_val(data, 2));
accel *= MPU6000_ACCEL_SCALE_1G;
gyro = Vector3f(int16_val(data, 5),
int16_val(data, 4),
-int16_val(data, 6));
gyro *= GYRO_SCALE;
temp = int16_val(data, 3);
/* scaling/offset values from the datasheet */
temp = temp/340 + 36.53;
#if CONFIG_HAL_BOARD_SUBTYPE == HAL_BOARD_SUBTYPE_LINUX_PXF
accel.rotate(ROTATION_PITCH_180_YAW_90);
gyro.rotate(ROTATION_PITCH_180_YAW_90);
#elif CONFIG_HAL_BOARD_SUBTYPE == HAL_BOARD_SUBTYPE_LINUX_BEBOP
accel.rotate(ROTATION_YAW_270);
gyro.rotate(ROTATION_YAW_270);
#elif CONFIG_HAL_BOARD_SUBTYPE == HAL_BOARD_SUBTYPE_LINUX_DISCO
accel.rotate(ROTATION_PITCH_180_YAW_90);
gyro.rotate(ROTATION_PITCH_180_YAW_90);
#elif CONFIG_HAL_BOARD_SUBTYPE == HAL_BOARD_SUBTYPE_LINUX_MINLURE
accel.rotate(ROTATION_YAW_90);
gyro.rotate(ROTATION_YAW_90);
#endif
_rotate_and_correct_accel(_accel_instance, accel);
_rotate_and_correct_gyro(_gyro_instance, gyro);
_notify_new_accel_raw_sample(_accel_instance, accel, AP_HAL::micros64(), fsync_set);
_notify_new_gyro_raw_sample(_gyro_instance, gyro);
_temp_filtered = _temp_filter.apply(temp);
}
}
void AP_InertialSensor_MPU6000::_read_fifo()
{
uint8_t n_samples;
uint16_t bytes_read;
uint8_t rx[MAX_DATA_READ];
static_assert(MAX_DATA_READ <= 100, "Too big to keep on stack");
if (!_block_read(MPUREG_FIFO_COUNTH, rx, 2)) {
hal.console->printf("MPU60x0: error in fifo read\n");
return;
}
bytes_read = uint16_val(rx, 0);
n_samples = bytes_read / MPU6000_SAMPLE_SIZE;
if (n_samples == 0) {
/* Not enough data in FIFO */
return;
}
if (n_samples > MPU6000_MAX_FIFO_SAMPLES) {
hal.console->printf("bytes_read = %u, n_samples %u > %u, dropping samples\n",
bytes_read, n_samples, MPU6000_MAX_FIFO_SAMPLES);
/* Too many samples, do a FIFO RESET */
_fifo_reset();
return;
}
if (!_block_read(MPUREG_FIFO_R_W, rx, n_samples * MPU6000_SAMPLE_SIZE)) {
hal.console->printf("MPU60x0: error in fifo read %u bytes\n",
n_samples * MPU6000_SAMPLE_SIZE);
return;
}
_accumulate(rx, n_samples);
}
void AP_InertialSensor_MPU6000::_read_sample()
{
/* one register address followed by seven 2-byte registers */
struct PACKED {
uint8_t int_status;
uint8_t d[14];
} rx;
if (!_block_read(MPUREG_INT_STATUS, (uint8_t *) &rx, sizeof(rx))) {
if (++_error_count > 4) {
// TODO: set bus speed low for this (and only this) device
hal.console->printf("MPU60x0: error reading sample\n");
return;
}
}
_accumulate(rx.d, 1);
}
bool AP_InertialSensor_MPU6000::_block_read(uint8_t reg, uint8_t *buf,
uint32_t size)
{
return _dev->read_registers(reg, buf, size);
}
uint8_t AP_InertialSensor_MPU6000::_register_read(uint8_t reg)
{
uint8_t val = 0;
_dev->read_registers(reg, &val, 1);
return val;
}
void AP_InertialSensor_MPU6000::_register_write(uint8_t reg, uint8_t val)
{
_dev->write_register(reg, val);
}
/*
set the DLPF filter frequency. Assumes caller has taken semaphore
*/
void AP_InertialSensor_MPU6000::_set_filter_register(uint16_t filter_hz)
{
uint8_t filter;
// choose filtering frequency
if (filter_hz == 0) {
filter = BITS_DLPF_CFG_256HZ_NOLPF2;
} else if (filter_hz <= 5) {
filter = BITS_DLPF_CFG_5HZ;
} else if (filter_hz <= 10) {
filter = BITS_DLPF_CFG_10HZ;
} else if (filter_hz <= 20) {
filter = BITS_DLPF_CFG_20HZ;
} else if (filter_hz <= 42) {
filter = BITS_DLPF_CFG_42HZ;
} else if (filter_hz <= 98) {
filter = BITS_DLPF_CFG_98HZ;
} else {
filter = BITS_DLPF_CFG_256HZ_NOLPF2;
}
#if MPU6000_EXT_SYNC_ENABLE
// add in EXT_SYNC bit if enabled
filter |= (MPUREG_CONFIG_EXT_SYNC_AZ << MPUREG_CONFIG_EXT_SYNC_SHIFT);
#endif
_register_write(MPUREG_CONFIG, filter);
}
bool AP_InertialSensor_MPU6000::_hardware_init(void)
{
if (!_dev->get_semaphore()->take(100)) {
AP_HAL::panic("MPU6000: Unable to get semaphore");
}
// initially run the bus at low speed
_dev->set_speed(AP_HAL::Device::SPEED_LOW);
// Chip reset
uint8_t tries;
for (tries = 0; tries < 5; tries++) {
uint8_t user_ctrl = _register_read(MPUREG_USER_CTRL);
/* First disable the master I2C to avoid hanging the slaves on the
* aulixiliar I2C bus - it will be enabled again if the AuxiliaryBus
* is used */
if (user_ctrl & BIT_USER_CTRL_I2C_MST_EN) {
_register_write(MPUREG_USER_CTRL, user_ctrl & ~BIT_USER_CTRL_I2C_MST_EN);
hal.scheduler->delay(10);
}
/* reset device */
_register_write(MPUREG_PWR_MGMT_1, BIT_PWR_MGMT_1_DEVICE_RESET);
hal.scheduler->delay(100);
/* bus-dependent initialization */
if (_dev->bus_type() == AP_HAL::Device::BUS_TYPE_SPI) {
/* Disable I2C bus if SPI selected (Recommended in Datasheet to be
* done just after the device is reset) */
_register_write(MPUREG_USER_CTRL, BIT_USER_CTRL_I2C_IF_DIS);
}
// Wake up device and select GyroZ clock. Note that the
// MPU6000 starts up in sleep mode, and it can take some time
// for it to come out of sleep
_register_write(MPUREG_PWR_MGMT_1, BIT_PWR_MGMT_1_CLK_ZGYRO);
hal.scheduler->delay(5);
// check it has woken up
if (_register_read(MPUREG_PWR_MGMT_1) == BIT_PWR_MGMT_1_CLK_ZGYRO) {
break;
}
hal.scheduler->delay(10);
if (_data_ready()) {
break;
}
#if MPU6000_DEBUG
_dump_registers();
#endif
}
_dev->set_speed(AP_HAL::Device::SPEED_HIGH);
_dev->get_semaphore()->give();
if (tries == 5) {
hal.console->println("Failed to boot MPU6000 5 times");
return false;
}
return true;
}
#if MPU6000_DEBUG
// dump all config registers - used for debug
void AP_InertialSensor_MPU6000::_dump_registers(void)
{
hal.console->println("MPU6000 registers");
if (!_dev->get_semaphore()->take(100)) {
return;
}
for (uint8_t reg=MPUREG_PRODUCT_ID; reg<=108; reg++) {
uint8_t v = _register_read(reg);
hal.console->printf("%02x:%02x ", (unsigned)reg, (unsigned)v);
if ((reg - (MPUREG_PRODUCT_ID-1)) % 16 == 0) {
hal.console->println();
}
}
hal.console->println();
_dev->get_semaphore()->give();
}
#endif
AP_MPU6000_AuxiliaryBusSlave::AP_MPU6000_AuxiliaryBusSlave(AuxiliaryBus &bus, uint8_t addr,
uint8_t instance)
: AuxiliaryBusSlave(bus, addr, instance)
, _mpu6000_addr(MPUREG_I2C_SLV0_ADDR + _instance * 3)
, _mpu6000_reg(_mpu6000_addr + 1)
, _mpu6000_ctrl(_mpu6000_addr + 2)
, _mpu6000_do(MPUREG_I2C_SLV0_DO + _instance)
{
}
int AP_MPU6000_AuxiliaryBusSlave::_set_passthrough(uint8_t reg, uint8_t size,
uint8_t *out)
{
auto &backend = AP_InertialSensor_MPU6000::from(_bus.get_backend());
uint8_t addr;
/* Ensure the slave read/write is disabled before changing the registers */
backend._register_write(_mpu6000_ctrl, 0);
if (out) {
backend._register_write(_mpu6000_do, *out);
addr = _addr;
} else {
addr = _addr | BIT_READ_FLAG;
}
backend._register_write(_mpu6000_addr, addr);
backend._register_write(_mpu6000_reg, reg);
backend._register_write(_mpu6000_ctrl, BIT_I2C_SLVX_EN | size);
return 0;
}
int AP_MPU6000_AuxiliaryBusSlave::passthrough_read(uint8_t reg, uint8_t *buf,
uint8_t size)
{
assert(buf);
if (_registered) {
hal.console->println("Error: can't passthrough when slave is already configured");
return -1;
}
int r = _set_passthrough(reg, size);
if (r < 0) {
return r;
}
/* wait the value to be read from the slave and read it back */
hal.scheduler->delay(10);
auto &backend = AP_InertialSensor_MPU6000::from(_bus.get_backend());
if (!backend._block_read(MPUREG_EXT_SENS_DATA_00 + _ext_sens_data, buf, size)) {
return -1;
}
/* disable new reads */
backend._register_write(_mpu6000_ctrl, 0);
return size;
}
int AP_MPU6000_AuxiliaryBusSlave::passthrough_write(uint8_t reg, uint8_t val)
{
if (_registered) {
hal.console->println("Error: can't passthrough when slave is already configured");
return -1;
}
int r = _set_passthrough(reg, 1, &val);
if (r < 0) {
return r;
}
/* wait the value to be written to the slave */
hal.scheduler->delay(10);
auto &backend = AP_InertialSensor_MPU6000::from(_bus.get_backend());
/* disable new writes */
backend._register_write(_mpu6000_ctrl, 0);
return 1;
}
int AP_MPU6000_AuxiliaryBusSlave::read(uint8_t *buf)
{
if (!_registered) {
hal.console->println("Error: can't read before configuring slave");
return -1;
}
auto &backend = AP_InertialSensor_MPU6000::from(_bus.get_backend());
if (!backend._block_read(MPUREG_EXT_SENS_DATA_00 + _ext_sens_data, buf, _sample_size)) {
return -1;
}
return _sample_size;
}
/* MPU6000 provides up to 5 slave devices, but the 5th is way too different to
* configure and is seldom used */
AP_MPU6000_AuxiliaryBus::AP_MPU6000_AuxiliaryBus(AP_InertialSensor_MPU6000 &backend, uint32_t devid)
: AuxiliaryBus(backend, 4, devid)
{
}
AP_HAL::Semaphore *AP_MPU6000_AuxiliaryBus::get_semaphore()
{
return static_cast<AP_InertialSensor_MPU6000&>(_ins_backend)._dev->get_semaphore();
}
AuxiliaryBusSlave *AP_MPU6000_AuxiliaryBus::_instantiate_slave(uint8_t addr, uint8_t instance)
{
/* Enable slaves on MPU6000 if this is the first time */
if (_ext_sens_data == 0) {
_configure_slaves();
}
return new AP_MPU6000_AuxiliaryBusSlave(*this, addr, instance);
}
void AP_MPU6000_AuxiliaryBus::_configure_slaves()
{
auto &backend = AP_InertialSensor_MPU6000::from(_ins_backend);
/* Enable the I2C master to slaves on the auxiliary I2C bus*/
uint8_t user_ctrl = backend._register_read(MPUREG_USER_CTRL);
backend._register_write(MPUREG_USER_CTRL, user_ctrl | BIT_USER_CTRL_I2C_MST_EN);
/* stop condition between reads; clock at 400kHz */
backend._register_write(MPUREG_I2C_MST_CTRL,
BIT_I2C_MST_P_NSR | BIT_I2C_MST_CLK_400KHZ);
/* Hard-code divider for internal sample rate, 1 kHz, resulting in a
* sample rate of 100Hz */
backend._register_write(MPUREG_I2C_SLV4_CTRL, 9);
/* All slaves are subject to the sample rate */
backend._register_write(MPUREG_I2C_MST_DELAY_CTRL,
BIT_I2C_SLV0_DLY_EN | BIT_I2C_SLV1_DLY_EN |
BIT_I2C_SLV2_DLY_EN | BIT_I2C_SLV3_DLY_EN);
}
int AP_MPU6000_AuxiliaryBus::_configure_periodic_read(AuxiliaryBusSlave *slave,
uint8_t reg, uint8_t size)
{
if (_ext_sens_data + size > MAX_EXT_SENS_DATA) {
return -1;
}
AP_MPU6000_AuxiliaryBusSlave *mpu_slave =
static_cast<AP_MPU6000_AuxiliaryBusSlave*>(slave);
mpu_slave->_set_passthrough(reg, size);
mpu_slave->_ext_sens_data = _ext_sens_data;
_ext_sens_data += size;
return 0;
}
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