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com.diozero.imu.drivers.invensense.MPU9150Driver Maven / Gradle / Ivy
package com.diozero.imu.drivers.invensense;
/*
* #%L
* Organisation: diozero
* Project: Device I/O Zero - IMU device classes
* Filename: MPU9150Driver.java
*
* This file is part of the diozero project. More information about this project
* can be found at http://www.diozero.com/
* %%
* Copyright (C) 2016 - 2020 diozero
* %%
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
* #L%
*/
import java.io.Closeable;
import java.nio.ByteBuffer;
import java.util.Arrays;
import org.tinylog.Logger;
import com.diozero.api.I2CDevice;
import com.diozero.util.IOUtil;
import com.diozero.util.RuntimeIOException;
import com.diozero.util.SleepUtil;
@SuppressWarnings("unused")
public class MPU9150Driver implements Closeable, MPU9150Constants, AK8975Constants {
private static final byte AKM_DATA_READY = 0x01;
private static final byte AKM_DATA_OVERRUN = 0x02;
private static final byte AKM_OVERFLOW = (byte)0x80;
private static final byte AKM_DATA_ERROR = 0x40;
private static final int MAX_PACKET_LENGTH = 12;
private static final int MPU6050_TEMP_OFFSET = -521;
private static final int MPU6500_TEMP_OFFSET = 0;
private static final int MAX_FIFO = 1024;
private static final int MPU6050_TEMP_SENS = 340;
private static final int MPU6500_TEMP_SENS = 321;
private int devAddr;
/* Matches gyro_cfg >> 3 & 0x03 */
private GyroFullScaleRange gyro_fsr;
/* Matches accel_cfg >> 3 & 0x03 */
private AccelFullScaleRange accel_fsr;
/* Enabled sensors. Uses same masks as fifo_en, NOT pwr_mgmt_2. */
private byte sensors;
private LowPassFilter lpf;
private ClockSource clk_src;
/* Sample rate, NOT rate divider. */
private int sample_rate;
/* Matches fifo_en register. */
private byte fifo_enable;
/* Matches int enable register. */
private boolean int_enable;
/* true if devices on auxiliary I2C bus appear on the primary. */
private Boolean bypass_mode;
/* true if half-sensitivity.
* NOTE: This doesn't belong here, but everything else in hw_s is const,
* and this allows us to save some precious RAM.
*/
private boolean accel_half;
/* true if device in low-power accel-only mode. */
private boolean lp_accel_mode;
/* true if interrupts are only triggered on motion events. */
private boolean int_motion_only;
//struct motion_int_cache_s cache;
/* true for active low interrupts. */
private boolean active_low_int;
/* true for latched interrupts. */
private boolean latched_int;
/* true if DMP is enabled. */
private boolean dmp_on;
/* Ensures that DMP will only be loaded once. */
private boolean dmp_loaded;
/* Sampling rate used when DMP is enabled. */
private int dmp_sample_rate;
/* Compass sample rate. */
private int compass_sample_rate;
private byte compass_addr;
private AK8975Driver magSensor;
private I2CDevice i2cDevice;
/**
* Default constructor, uses default I2C address.
* @throws RuntimeIOException if an I/O error occurs
* @param controllerNumber I2C contrller
* @param addressSize Address size (7 or 10)
* @param clockFreq I2C clock frequency
*/
public MPU9150Driver(int controllerNumber, int addressSize, int clockFreq) throws RuntimeIOException {
this(controllerNumber, addressSize, clockFreq, MPU9150_DEFAULT_ADDRESS);
}
/**
* Specific address constructor.
* @param controllerNumber I2C contrller
* @param addressSize Address size (7 or 10)
* @param clockFreq I2C clock frequency
* @param devAddr address I2C address
* @throws RuntimeIOException if an I/O error occurs
*/
public MPU9150Driver(int controllerNumber, int addressSize, int clockFreq, int devAddr) throws RuntimeIOException {
i2cDevice = new I2CDevice(controllerNumber, devAddr, addressSize, clockFreq);
this.devAddr = devAddr;
}
@Override
public void close() throws RuntimeIOException {
if (magSensor != null) { magSensor.close(); }
i2cDevice.close();
}
/**
* Enable/disable data ready interrupt.
* If the DMP is on, the DMP interrupt is enabled. Otherwise, the data ready
* interrupt is used.
* @param enable 1 to enable interrupt.
* @return success status
* @throws RuntimeIOException if an I/O error occurs
*/
public boolean set_int_enable(boolean enable) throws RuntimeIOException {
byte tmp;
if (dmp_on) {
if (enable) {
tmp = BIT_DMP_INT_EN;
} else {
tmp = 0x00;
}
// int_enable == 0x38 == MPU9150_RA_INT_ENABLE
i2cDevice.writeByte(MPU9150_RA_INT_ENABLE, tmp);
int_enable = enable;
} else {
if (sensors == 0) {
return false;
}
if (enable && int_enable) {
return true;
}
if (enable) {
tmp = BIT_DATA_RDY_EN;
} else {
tmp = 0x00;
}
// int_enable == 0x38 == MPU9150_RA_INT_ENABLE
i2cDevice.writeByte(MPU9150_RA_INT_ENABLE, tmp);
int_enable = enable;
}
return true;
}
/**
* Initialize hardware.
* Initial configuration:
* Gyro FSR: +/- 2000DPS
* Accel FSR +/- 2G
* DLPF: 42Hz
* FIFO rate: 50Hz
* Clock source: Gyro PLL
* FIFO: Disabled.
* Data ready interrupt: Disabled, active low, unlatched.
* @throws RuntimeIOException if an I/O error occurs
*/
public void mpu_init() throws RuntimeIOException {
/* Reset device. */
// pwr_mgmt_1 == 0x6B, MPU9150_RA_PWR_MGMT_1, BIT_RESET (pin 7, 0x80)
i2cDevice.writeByte(MPU9150_RA_PWR_MGMT_1, BIT_RESET);
SleepUtil.sleepMillis(100);
/* Wake up chip. */
i2cDevice.writeByte(MPU9150_RA_PWR_MGMT_1, 0);
accel_half = false;
/* Set to invalid values to ensure no I2C writes are skipped. */
sensors = (byte)0xFF;
gyro_fsr = null;
accel_fsr = null;
lpf = null;
sample_rate = 0xFFFF;
fifo_enable = (byte)0xFF;
bypass_mode = null;
compass_sample_rate = 0xFFFF;
/* mpu_set_sensors always preserves this setting. */
clk_src = ClockSource.INV_CLK_PLL;
/* Handled in next call to mpu_set_bypass. */
active_low_int = true;
latched_int = false;
int_motion_only = false;
lp_accel_mode = false;
//memset(&st.chip_cfg.cache, 0, sizeof(st.chip_cfg.cache));
dmp_on = false;
dmp_loaded = false;
dmp_sample_rate = 0;
mpu_set_gyro_fsr(GyroFullScaleRange.INV_FSR_2000DPS);
mpu_set_accel_fsr(AccelFullScaleRange.INV_FSR_2G);
mpu_set_lpf(42);
mpu_set_sample_rate(50);
mpu_configure_fifo((byte)0);
//if (int_param)
// reg_int_cb(int_param);
setup_compass();
mpu_set_compass_sample_rate(10);
mpu_set_sensors((byte)0);
}
/**
* Enter low-power accel-only mode.
* In low-power accel mode, the chip goes to sleep and only wakes up to sample
* the accelerometer at one of the following frequencies:
* MPU6050: 1.25Hz, 5Hz, 20Hz, 40Hz
* MPU6500: 1.25Hz, 2.5Hz, 5Hz, 10Hz, 20Hz, 40Hz, 80Hz, 160Hz, 320Hz, 640Hz
* If the requested rate is not one listed above, the device will be set to
* the next highest rate. Requesting a rate above the maximum supported
* frequency will result in an error.
* To select a fractional wake-up frequency, round down the value passed to rate.
* @param rate Minimum sampling rate, or zero to disable LP accel mode.
* @return true if successful.
* @throws RuntimeIOException if an I/O error occurs
*/
public boolean mpu_lp_accel_mode(int rate) throws RuntimeIOException {
if (rate > 40) {
return false;
}
byte[] tmp = new byte[2];
if (rate == 0) {
mpu_set_int_latched(false);
tmp[0] = 0;
tmp[1] = BIT_STBY_XYZG;
i2cDevice.writeBytes(MPU9150_RA_PWR_MGMT_1, 2, tmp);
lp_accel_mode = false;
return true;
}
/* For LP accel, we automatically configure the hardware to produce latched
* interrupts. In LP accel mode, the hardware cycles into sleep mode before
* it gets a chance to deassert the interrupt pin; therefore, we shift this
* responsibility over to the MCU.
*
* Any register read will clear the interrupt.
*/
mpu_set_int_latched(true);
tmp[0] = BIT_LPA_CYCLE;
if (rate == 1) {
tmp[1] = LowPowerAccelWakeupRate.INV_LPA_1_25HZ.getValue();
mpu_set_lpf(5);
} else if (rate <= 5) {
tmp[1] = LowPowerAccelWakeupRate.INV_LPA_5HZ.getValue();
mpu_set_lpf(5);
} else if (rate <= 20) {
tmp[1] = LowPowerAccelWakeupRate.INV_LPA_20HZ.getValue();
mpu_set_lpf(10);
} else {
tmp[1] = LowPowerAccelWakeupRate.INV_LPA_40HZ.getValue();
mpu_set_lpf(20);
}
tmp[1] = (byte) (((tmp[1]&0xff) << 6) | BIT_STBY_XYZG);
// pwr_mgmt_1 == 0x6B, MPU9150_RA_PWR_MGMT_1, BIT_RESET (pin 7, 0x80)
i2cDevice.writeBytes(MPU9150_RA_PWR_MGMT_1, 2, tmp);
sensors = INV_XYZ_ACCEL;
clk_src = ClockSource.INV_CLK_INTERNAL;
lp_accel_mode = true;
mpu_configure_fifo((byte)0);
return true;
}
/**
* Read raw gyro data directly from the registers.
* @return Raw data in hardware units.
* @throws RuntimeIOException if an I/O error occurs
*/
public short[] mpu_get_gyro_reg() throws RuntimeIOException {
if ((sensors & INV_XYZ_GYRO) == 0) {
return null;
}
// raw_gyro == 0x43 == MPU9150_RA_GYRO_XOUT_H
ByteBuffer buffer = ByteBuffer.wrap(i2cDevice.readBytes(MPU9150_RA_GYRO_XOUT_H, 6));
short x = IOUtil.getShort(buffer);
short y = IOUtil.getShort(buffer);
short z = IOUtil.getShort(buffer);
System.out.format("gyro reg values = (%d, %d, %d)%n", Short.valueOf(x), Short.valueOf(y), Short.valueOf(z));
/*byte[] data = readBytes(MPU9150_RA_GYRO_XOUT_H, 6)
short x = (short)((data[0] << 8) | (data[1] & 0xff));
short y = (short)((data[2] << 8) | (data[3] & 0xff));
short z = (short)((data[4] << 8) | (data[5] & 0xff));*/
return new short[] {x, y, z};
}
/**
* Each 16-bit accelerometer measurement has a full scale defined in ACCEL_FS (Register 28).
* For each full scale setting, the accelerometers' sensitivity per LSB in ACCEL_xOUT is shown in the table below.
* AFS_SEL Full Scale Range LSB Sensitivity
* 0 +/-2g 16384 LSB/mg
* 1 +/-4g 8192 LSB/mg
* 2 +/-8g 4096 LSB/mg
* 3 +/-16g 2048 LSB/mg
* @return Raw data in hardware units.
* @throws RuntimeIOException if an I/O error occurs
*/
public short[] mpu_get_accel_reg() throws RuntimeIOException {
if ((sensors & INV_XYZ_ACCEL) == 0) {
return null;
}
// raw_accel == 0x3B == MPU9150_RA_ACCEL_XOUT_H
ByteBuffer buffer = ByteBuffer.wrap(i2cDevice.readBytes(MPU9150_RA_ACCEL_XOUT_H, 6));
short x = buffer.getShort();
short y = buffer.getShort();
short z = buffer.getShort();
/*
byte[] data = readBytes(MPU9150_RA_ACCEL_XOUT_H, 6);
short x = (short)((data[0] << 8) | (data[1] & 0xff));
short y = (short)((data[2] << 8) | (data[3] & 0xff));
short z = (short)((data[4] << 8) | (data[5] & 0xff));
*/
return new short[] {x, y, z};
}
/**
* Read temperature data directly from the registers.
* The scale factor and offset for the temperature sensor are found in the Electrical
* Specifications table in the MPU-9150 Product Specification document.
* The temperature in degrees C for a given register value may be computed as:
* Temperature in degrees C = (TEMP_OUT Register Value as a signed quantity)/340 + 35
* Please note that the math in the above equation is in decimal.
* @return Temperature
* @throws RuntimeIOException if an I/O error occurs
*/
public float mpu_get_temperature() throws RuntimeIOException {
if (sensors == 0) {
return -1;
}
// temp == 0x41 == MPU9150_RA_TEMP_OUT_H
short raw = i2cDevice.readShort(MPU9150_RA_TEMP_OUT_H);
//raw = (tmp[0] << 8) | (tmp[1] & 0xff);
float val = ((raw - MPU6050_TEMP_OFFSET) / (float)MPU6050_TEMP_SENS) + 35;
return val;
}
/**
* Read biases to the accel bias 6050 registers.
* This function reads from the MPU6050 accel offset cancellations registers.
* The format are G in +-8G format. The register is initialised with OTP
* factory trim values.
* @return accel_bias returned structure with the accel bias
* @throws RuntimeIOException if an I/O error occurs
*/
public short[] mpu_read_6050_accel_bias() throws RuntimeIOException {
short[] accel_bias = new short[3];
/*
byte[] bias_x_bytes = readBytes(MPU9150_RA_XA_OFFS_H, 2);
byte[] bias_y_bytes = readBytes(MPU9150_RA_YA_OFFS_H, 2);
byte[] bias_z_bytes = readBytes(MPU9150_RA_ZA_OFFS_H, 2);
accel_bias[0] = (bias_x_bytes[0] << 8) | (bias_x_bytes[1] & 0xff);
accel_bias[1] = (bias_y_bytes[2] << 8) | (bias_y_bytes[3] & 0xff);
accel_bias[2] = (bias_z_bytes[4] << 8) | (bias_z_bytes[5] & 0xff);
*/
ByteBuffer buffer = ByteBuffer.wrap(i2cDevice.readBytes(MPU9150_RA_XA_OFFS_H, 6));
accel_bias[0] = IOUtil.getShort(buffer);
accel_bias[1] = IOUtil.getShort(buffer);
accel_bias[2] = IOUtil.getShort(buffer);
return accel_bias;
}
/**
* Push biases to the gyro bias 6500/6050 registers.
* This function expects biases relative to the current sensor output, and
* these biases will be added to the factory-supplied values. Bias inputs are LSB
* in +-1000dps format.
* @param gyro_bias New biases.
* @throws RuntimeIOException if an I/O error occurs
*/
public void mpu_set_gyro_bias_reg(short[] gyro_bias) throws RuntimeIOException {
for(int i=0; i<3; i++) {
gyro_bias[i] = (short)-gyro_bias[i];
}
/*
byte data[] = {0, 0, 0, 0, 0, 0};
data[0] = (byte)((gyro_bias[0] >> 8) & 0xff);
data[1] = (byte)((gyro_bias[0]) & 0xff);
data[2] = (byte)((gyro_bias[1] >> 8) & 0xff);
data[3] = (byte)((gyro_bias[1]) & 0xff);
data[4] = (byte)((gyro_bias[2] >> 8) & 0xff);
data[5] = (byte)((gyro_bias[2]) & 0xff);
*/
i2cDevice.writeShort(MPU9150_RA_XG_OFFS_USRH, gyro_bias[0]);
i2cDevice.writeShort(MPU9150_RA_YG_OFFS_USRH, gyro_bias[1]);
i2cDevice.writeShort(MPU9150_RA_ZG_OFFS_USRH, gyro_bias[2]);
}
/**
* Push biases to the accel bias 6050 registers.
* This function expects biases relative to the current sensor output, and
* these biases will be added to the factory-supplied values. Bias inputs are LSB
* in +-16G format.
* @param accel_bias New biases.
* @throws RuntimeIOException if an I/O error occurs
*/
public void mpu_set_accel_bias_6050_reg(short[] accel_bias) throws RuntimeIOException {
short accel_reg_bias[] = mpu_read_6050_accel_bias();
accel_reg_bias[0] -= (accel_bias[0] & ~1);
accel_reg_bias[1] -= (accel_bias[1] & ~1);
accel_reg_bias[2] -= (accel_bias[2] & ~1);
/*
byte data[] = {0, 0, 0, 0, 0, 0};
data[0] = (byte)((accel_reg_bias[0] >> 8) & 0xff);
data[1] = (byte)((accel_reg_bias[0]) & 0xff);
data[2] = (byte)((accel_reg_bias[1] >> 8) & 0xff);
data[3] = (byte)((accel_reg_bias[1]) & 0xff);
data[4] = (byte)((accel_reg_bias[2] >> 8) & 0xff);
data[5] = (byte)((accel_reg_bias[2]) & 0xff);
*/
i2cDevice.writeShort(MPU9150_RA_XA_OFFS_H, accel_reg_bias[0]);
i2cDevice.writeShort(MPU9150_RA_YA_OFFS_H, accel_reg_bias[1]);
i2cDevice.writeShort(MPU9150_RA_ZA_OFFS_H, accel_reg_bias[2]);
}
/**
* Reset FIFO read/write pointers.
* @throws RuntimeIOException if an I/O error occurs
* @return status
*/
public boolean mpu_reset_fifo() throws RuntimeIOException {
if (sensors == 0) {
Logger.warn("mpu_reset_fifo(), sensors==0, returning");
return false;
}
byte data = 0;
// int_enable == 0x38 == MPU9150_RA_INT_ENABLE
i2cDevice.writeByte(MPU9150_RA_INT_ENABLE, data);
// fifo_en == 0x23 == MPU9150_RA_FIFO_EN
i2cDevice.writeByte(MPU9150_RA_FIFO_EN, data);
// user_ctrl == 0x6a == MPU9150_RA_USER_CTRL for MPU-6050
i2cDevice.writeByte(MPU9150_RA_USER_CTRL, data);
if (dmp_on) {
data = BIT_FIFO_RST | BIT_DMP_RST;
// user_ctrl == 0x6a == MPU9150_RA_USER_CTRL for MPU-6050
i2cDevice.writeByte(MPU9150_RA_USER_CTRL, data);
SleepUtil.sleepMillis(50);
data = BIT_DMP_EN | BIT_FIFO_EN;
if ((sensors & INV_XYZ_COMPASS) != 0) {
data |= BIT_AUX_IF_EN;
}
// user_ctrl == 0x6a == MPU9150_RA_USER_CTRL for MPU-6050
i2cDevice.writeByte(MPU9150_RA_USER_CTRL, data);
if (int_enable) {
data = BIT_DMP_INT_EN;
} else {
data = 0;
}
// int_enable == 0x38 == MPU9150_RA_INT_ENABLE
i2cDevice.writeByte(MPU9150_RA_INT_ENABLE, data);
data = 0;
// fifo_en == 0x23 == MPU9150_RA_FIFO_EN
i2cDevice.writeByte(MPU9150_RA_FIFO_EN, data);
} else {
data = BIT_FIFO_RST;
// user_ctrl == 0x6a == MPU9150_RA_USER_CTRL for MPU-6050
i2cDevice.writeByte(MPU9150_RA_USER_CTRL, data);
if ((bypass_mode != null && bypass_mode.booleanValue()) || ((sensors & INV_XYZ_COMPASS) == 0)) {
data = BIT_FIFO_EN;
} else {
data = BIT_FIFO_EN | BIT_AUX_IF_EN;
}
// user_ctrl == 0x6a == MPU9150_RA_USER_CTRL for MPU-6050
i2cDevice.writeByte(MPU9150_RA_USER_CTRL, data);
SleepUtil.sleepMillis(50);
if (int_enable) {
data = BIT_DATA_RDY_EN;
} else {
data = 0;
}
// int_enable == 0x38 == MPU9150_RA_INT_ENABLE
i2cDevice.writeByte(MPU9150_RA_INT_ENABLE, data);
// fifo_en == 0x23 == MPU9150_RA_FIFO_EN
i2cDevice.writeByte(MPU9150_RA_FIFO_EN, fifo_enable);
}
return true;
}
/**
* Get the gyro full-scale range.
* @return fsr Current full-scale range.
*/
public GyroFullScaleRange mpu_get_gyro_fsr() {
return gyro_fsr;
}
/**
* Set the gyro full-scale range.
* @param fsr Desired full-scale range.
* @return status
* @throws RuntimeIOException if an I/O error occurs
*/
public boolean mpu_set_gyro_fsr(GyroFullScaleRange fsr) throws RuntimeIOException {
if (sensors == 0) {
return false;
}
if (gyro_fsr == fsr) {
return true;
}
System.out.format("Setting gyro config to 0x%x%n", Byte.valueOf(fsr.getBitVal()));
// gyro_cfg == 0x1B == MPU9150_RA_GYRO_CONFIG
i2cDevice.writeByte(MPU9150_RA_GYRO_CONFIG, fsr.getBitVal());
gyro_fsr = fsr;
return true;
}
public AccelFullScaleRange mpu_get_accel_fsr() {
if (accel_half) {
// TODO Missing accel_half compensation
//fsr <<= 1;
}
return accel_fsr;
}
/**
* Set the accel full-scale range.
* @param fsr Desired full-scale range.
* @throws RuntimeIOException if an I/O error occurs
* @return status
*/
public boolean mpu_set_accel_fsr(AccelFullScaleRange fsr) throws RuntimeIOException {
if (sensors == 0) {
return false;
}
if (accel_fsr == fsr) {
return true;
}
System.out.format("Setting accel config to 0x%x%n", Byte.valueOf(fsr.getBitVal()));
// accel_cfg == 0x1C == MPU9150_RA_ACCEL_CONFIG
i2cDevice.writeByte(MPU9150_RA_ACCEL_CONFIG, fsr.getBitVal());
accel_fsr = fsr;
return true;
}
public LowPassFilter mpu_get_lpf() {
return lpf;
}
/**
* Set digital low pass filter.
* The following LPF settings are supported: 188, 98, 42, 20, 10, 5.
* @param frequency Desired LPF setting.
* @throws RuntimeIOException if an I/O error occurs
* @return status
*/
public boolean mpu_set_lpf(int frequency) throws RuntimeIOException {
return mpu_set_lpf(LowPassFilter.getForFrequency(frequency));
}
/**
* Set digital low pass filter.
* The following LPF settings are supported: 188, 98, 42, 20, 10, 5.
* @param lpf Desired LPF setting.
* @throws RuntimeIOException if an I/O error occurs
* @return status
*/
public boolean mpu_set_lpf(LowPassFilter lpf) throws RuntimeIOException {
if (sensors == 0) {
return false;
}
if (this.lpf == lpf) {
return true;
}
System.out.format("Setting LPF to %d, bit value 0x%x%n", Integer.valueOf(lpf.getFreq()), Byte.valueOf(lpf.getBitVal()));
// lpf == 0x1A == MPU9150_RA_CONFIG
i2cDevice.writeByte(MPU9150_RA_CONFIG, lpf.getBitVal());
this.lpf = lpf;
return true;
}
public int mpu_get_sample_rate() {
return sample_rate;
}
/**
* Set sampling rate.
* Sampling rate must be between 4Hz and 1kHz.
* @param rate Desired sampling rate (Hz).
* @throws RuntimeIOException if an I/O error occurs
* @return status
*/
public boolean mpu_set_sample_rate(int rate) throws RuntimeIOException {
Logger.debug("mpu_set_sample_rate({})", rate);
if (sensors == 0) {
return false;
}
if (dmp_on) {
Logger.warn("mpu_set_sample_rate() DMP is on, returning");
return false;
}
if (lp_accel_mode) {
if (rate != 0 && (rate <= 40)) {
/* Just stay in low-power accel mode. */
Logger.debug("Just setting lp_accel_mode to {}", rate);
mpu_lp_accel_mode(rate);
return true;
}
/* Requested rate exceeds the allowed frequencies in LP accel mode,
* switch back to full-power mode.
*/
Logger.debug("Setting lp_accel_mode to 0");
mpu_lp_accel_mode(0);
}
int new_rate = rate;
if (new_rate < 4) {
new_rate = 4;
} else if (new_rate > 1000) {
new_rate = 1000;
}
int data = 1000 / new_rate - 1;
Logger.debug("Setting sample rate to {}", data);
// rate_div == 0x19 == MPU9150_RA_SMPL_RATE_DIV
i2cDevice.writeByte(MPU9150_RA_SMPL_RATE_DIV, data);
sample_rate = 1000 / (1 + data);
mpu_set_compass_sample_rate(Math.min(compass_sample_rate, MAX_COMPASS_SAMPLE_RATE));
Logger.debug("Automatically setting LPF to {}", sample_rate >> 1);
/* Automatically set LPF to 1/2 sampling rate. */
mpu_set_lpf(sample_rate >> 1);
return true;
}
public int mpu_get_compass_sample_rate() {
return compass_sample_rate;
}
/**
* Set compass sampling rate.
* The compass on the auxiliary I2C bus is read by the MPU hardware at a
* maximum of 100Hz. The actual rate can be set to a fraction of the gyro
* sampling rate.
*
* WARNING: The new rate may be different than what was requested. Call
* mpu_get_compass_sample_rate to check the actual setting.
* @param rate Desired compass sampling rate (Hz).
* @throws RuntimeIOException if an I/O error occurs
* @return status
*/
public boolean mpu_set_compass_sample_rate(int rate) throws RuntimeIOException {
Logger.debug("mpu_set_compass_sample_rate({})", rate);
if (rate == 0 || rate > sample_rate || rate > MAX_COMPASS_SAMPLE_RATE) {
return false;
}
byte div = (byte)(sample_rate / rate - 1);
// s4_ctrl == 0x34 == MPU9150_RA_I2C_SLV4_CTRL
i2cDevice.writeByte(MPU9150_RA_I2C_SLV4_CTRL, div);
compass_sample_rate = sample_rate / (div + 1);
return true;
}
/**
* Get gyro sensitivity scale factor.
* @return Sensitivy, conversion from hardware units to dps.
*/
public double mpu_get_gyro_sens() {
/*
float sens;
switch (gyro_fsr) {
case INV_FSR_250DPS:
sens = 131.0f;
break;
case INV_FSR_500DPS:
sens = 65.5f;
break;
case INV_FSR_1000DPS:
sens = 32.8f;
break;
case INV_FSR_2000DPS:
sens = 16.4f;
break;
default:
sens = -1f;
}
return sens;
*/
return gyro_fsr.getSensitivityScaleFactor();
}
/**
* Get accel sensitivity scale factor.
* @return Sensitivity. Conversion from hardware units to g's.
*/
public int mpu_get_accel_sens() {
/*
int sens;
switch (accel_fsr) {
case INV_FSR_2G:
sens = 16384;
break;
case INV_FSR_4G:
sens = 8192;
break;
case INV_FSR_8G:
sens = 4096;
break;
case INV_FSR_16G:
sens = 2048;
break;
default:
return -1;
}
*/
int sens = accel_fsr.getSensitivityScaleFactor();
if (accel_half) {
sens >>= 1;
}
return sens;
}
/**
* Get current FIFO configuration.
* sensors can contain a combination of the following flags:
* INV_X_GYRO, INV_Y_GYRO, INV_Z_GYRO
* INV_XYZ_GYRO
* INV_XYZ_ACCEL
* @return sensors Mask of sensors in FIFO.
*/
public byte mpu_get_fifo_config() {
return fifo_enable;
}
/**
* Select which sensors are pushed to FIFO.
* sensors can contain a combination of the following flags:
* INV_X_GYRO, INV_Y_GYRO, INV_Z_GYRO
* INV_XYZ_GYRO
* INV_XYZ_ACCEL
* @param newSensors Mask of sensors to push to FIFO.
* @throws RuntimeIOException if an I/O error occurs
* @return status
*/
public boolean mpu_configure_fifo(byte newSensors) throws RuntimeIOException {
System.out.format("mpu_configure_fifo 0x%x%n", Byte.valueOf(sensors));
if (dmp_on) {
Logger.info("DMP is on, returning");
return true;
}
/* Compass data isn't going into the FIFO. Stop trying. */
newSensors &= ~INV_XYZ_COMPASS;
if (sensors == 0) {
Logger.error("mpu_configure_fifo() sensors == 0, returning");
return false;
}
byte prev = fifo_enable;
fifo_enable = (byte)(newSensors & sensors);
boolean result;
if (fifo_enable != newSensors) {
/* You're not getting what you asked for. Some sensors are asleep. */
Logger.info("You're not getting what you asked for. Some sensors are asleep.");
result = false;
} else {
result = true;
}
if (newSensors != 0 || lp_accel_mode) {
set_int_enable(true);
} else {
set_int_enable(false);
}
if (newSensors != 0) {
if (mpu_reset_fifo()) {
fifo_enable = prev;
return false;
}
}
return result;
}
/**
* Get current power state.
* @return power_on 1 if turned on, 0 if suspended.
*/
public boolean mpu_get_power_state() {
if (sensors != 0) {
return true;
}
return false;
}
/**
* Turn specific sensors on/off.
* sensors can contain a combination of the following flags:
* INV_X_GYRO, INV_Y_GYRO, INV_Z_GYRO
* INV_XYZ_GYRO
* INV_XYZ_ACCEL
* INV_XYZ_COMPASS
* @param newSensors Mask of sensors to wake.
* @return true if successful.
* @throws RuntimeIOException if an I/O error occurs
*/
public boolean mpu_set_sensors(byte newSensors) throws RuntimeIOException {
byte data;
byte user_ctrl;
if ((newSensors & INV_XYZ_GYRO) != 0) {
data = ClockSource.INV_CLK_PLL.getVal();
} else if (newSensors != 0) {
data = ClockSource.INV_CLK_INTERNAL.getVal();
} else {
data = BIT_SLEEP;
}
try {
// pwr_mgmt_1 == 0x6B, MPU9150_RA_PWR_MGMT_1
i2cDevice.writeByte(MPU9150_RA_PWR_MGMT_1, data);
} catch (RuntimeIOException ioe) {
System.out.format("Error in mpu_set_sensors(%x): %s%n", Byte.valueOf(newSensors), ioe);
ioe.printStackTrace();
sensors = 0;
return false;
}
clk_src = ClockSource.values()[data & ~BIT_SLEEP];
data = 0;
if ((newSensors & INV_X_GYRO) == 0) {
data |= BIT_STBY_XG;
}
if ((newSensors & INV_Y_GYRO) == 0) {
data |= BIT_STBY_YG;
}
if ((newSensors & INV_Z_GYRO) == 0) {
data |= BIT_STBY_ZG;
}
if ((newSensors & INV_XYZ_ACCEL) == 0) {
data |= BIT_STBY_XYZA;
}
try {
// pwr_mgmt_2 == 0x6C == MPU9150_RA_PWR_MGMT_2
i2cDevice.writeByte(MPU9150_RA_PWR_MGMT_2, data);
} catch (RuntimeIOException ioe) {
System.out.format("Error in mpu_set_sensors(%x): %s%n", Byte.valueOf(newSensors), ioe);
ioe.printStackTrace();
sensors = 0;
return false;
}
if (newSensors != 0 && (newSensors != INV_XYZ_ACCEL)) {
/* Latched interrupts only used in LP accel mode. */
mpu_set_int_latched(false);
}
//#ifdef AK89xx_SECONDARY
// user_ctrl == 0x6a == MPU9150_RA_USER_CTRL for MPU-6050
user_ctrl = i2cDevice.readByte(MPU9150_RA_USER_CTRL);
/* Handle AKM power management. */
if ((newSensors & INV_XYZ_COMPASS) != 0) {
data = AKM_SINGLE_MEASUREMENT;
user_ctrl |= BIT_AUX_IF_EN;
} else {
data = AKM_POWER_DOWN;
user_ctrl &= ~BIT_AUX_IF_EN;
}
if (dmp_on) {
user_ctrl |= BIT_DMP_EN;
} else {
user_ctrl &= ~BIT_DMP_EN;
}
// s1_do == 0x64 == MPU9150_RA_I2C_SLV1_DO
i2cDevice.writeByte(MPU9150_RA_I2C_SLV1_DO, data);
/* Enable/disable I2C master mode. */
// user_ctrl == 0x6a == MPU9150_RA_USER_CTRL for MPU-6050
i2cDevice.writeByte(MPU9150_RA_USER_CTRL, user_ctrl);
//#endif
sensors = newSensors;
lp_accel_mode = false;
SleepUtil.sleepMillis(50);
return true;
}
/**
* Read the MPU interrupt status registers.
* @return status Mask of interrupt bits.
* @throws RuntimeIOException if an I/O error occurs
*/
public short mpu_get_int_status() throws RuntimeIOException {
if (sensors == 0) {
return -1;
}
// dmp_int_status == 0x39 == MPU9150_RA_DMP_INT_STATUS
return i2cDevice.readShort(MPU9150_RA_DMP_INT_STATUS);
}
/**
* Get one packet from the FIFO.
* If sensors does not contain a particular sensor, disregard the data
* returned to that pointer.
* sensors can contain a combination of the following flags:
* INV_X_GYRO, INV_Y_GYRO, INV_Z_GYRO
* INV_XYZ_GYRO
* INV_XYZ_ACCEL
* If the FIFO has no new data, sensors will be zero.
* If the FIFO is disabled, sensors will be zero and this function will
* return a non-zero error code.
* @return FIFOData:
* gyro Gyro data in hardware units.
* accel Accel data in hardware units.
* timestamp Timestamp in milliseconds.
* sensors Mask of sensors read from FIFO.
* more Number of remaining packets.
* @throws RuntimeIOException if an I/O error occurs
*/
public MPU9150FIFOData mpu_read_fifo() throws RuntimeIOException {
if (dmp_on) {
return null;
}
if (sensors == 0) {
Logger.warn("mpu_read_fifo() sensors == 0, returning");
return null;
}
if (fifo_enable == 0) {
Logger.warn("mpu_read_fifo() fifo_enable == 0, returning");
return null;
}
/* Assumes maximum packet size is gyro (6) + accel (6). */
short packet_size = 0;
if ((fifo_enable & INV_X_GYRO) != 0) {
packet_size += 2;
}
if ((fifo_enable & INV_Y_GYRO) != 0) {
packet_size += 2;
}
if ((fifo_enable & INV_Z_GYRO) != 0) {
packet_size += 2;
}
if ((fifo_enable & INV_XYZ_ACCEL) != 0) {
packet_size += 6;
}
byte[] data = new byte[MAX_PACKET_LENGTH];
// fifo_count_h == 0x72 == MPU9150_RA_FIFO_COUNTH
//fifo_count = readUShort(MPU9150_RA_FIFO_COUNTH, SUB_ADDRESS_SIZE_1_BYTE);
data = i2cDevice.readBytes(MPU9150_RA_FIFO_COUNTH, 2);
int fifo_count = ((data[0] & 0xff) << 8) | (data[1] & 0xff);
//fifo_count = (data[0] << 8) | data[1];
if (fifo_count < packet_size) {
System.out.format("mpu_read_fifo() fifo_count(%d) < packet_size(%d)%n",
Integer.valueOf(fifo_count), Integer.valueOf(packet_size));
return null;
}
// log_i("FIFO count: %hd\n", fifo_count);
if (fifo_count > (MAX_FIFO >> 1)) {
System.out.format("mpu_read_fifo() fifo_count(%d) is more than 50% full");
/* FIFO is 50% full, better check overflow bit. */
// int_status == 0x3a == MPU9150_RA_INT_STATUS
data[0] = i2cDevice.readByte(MPU9150_RA_INT_STATUS);
if ((data[0] & BIT_FIFO_OVERFLOW) != 0) {
System.out.format("mpu_read_fifo() overflow bit is set");
mpu_reset_fifo();
return null;
}
}
long timestamp = System.currentTimeMillis();
// fifo_r_w == 0x74 == MPU9150_RA_FIFO_R_W
data = i2cDevice.readBytes(MPU9150_RA_FIFO_R_W, packet_size);
int more = fifo_count / packet_size - 1;
short fifo_sensors = 0;
// Accel and gyro data are both signed short values
short[] accel = new short[3];
short[] gyro = new short[3];
int index = 0;
if ((index != packet_size) && (fifo_enable & INV_XYZ_ACCEL) != 0) {
accel[0] = (short)((data[index+0] << 8) | (data[index+1] & 0xff));
accel[1] = (short)((data[index+2] << 8) | (data[index+3] & 0xff));
accel[2] = (short)((data[index+4] << 8) | (data[index+5] & 0xff));
fifo_sensors |= INV_XYZ_ACCEL;
index += 6;
}
if ((index != packet_size) && (fifo_enable & INV_X_GYRO) != 0) {
gyro[0] = (short)((data[index+0] << 8) | (data[index+1] & 0xff));
fifo_sensors |= INV_X_GYRO;
index += 2;
}
if ((index != packet_size) && (fifo_enable & INV_Y_GYRO) != 0) {
gyro[1] = (short)((data[index+0] << 8) | (data[index+1] & 0xff));
fifo_sensors |= INV_Y_GYRO;
index += 2;
}
if ((index != packet_size) && (fifo_enable & INV_Z_GYRO) != 0) {
gyro[2] = (short)((data[index+0] << 8) | (data[index+1] & 0xff));
fifo_sensors |= INV_Z_GYRO;
index += 2;
}
return new MPU9150FIFOData(gyro, accel, null, timestamp, fifo_sensors, more);
}
/**
* Get one unparsed packet from the FIFO.
* This function should be used if the packet is to be parsed elsewhere.
* @param length Length of one FIFO packet.
* @return more Number of remaining packets.
* @throws RuntimeIOException if an I/O error occurs
*/
public FIFOStream mpu_read_fifo_stream(int length) throws RuntimeIOException {
if (!dmp_on) {
Logger.warn("mpu_read_fifo_stream(), dmp_on is false, returning");
return null;
}
if (sensors == 0) {
Logger.warn("mpu_read_fifo_stream(), sensors == 0, returning");
return null;
}
// fifo_count_h == 0x72 == MPU9150_RA_FIFO_COUNTH
//int fifo_count = readUShort(MPU9150_RA_FIFO_COUNTH, SUB_ADDRESS_SIZE_1_BYTE);
byte[] tmp = i2cDevice.readBytes(MPU9150_RA_FIFO_COUNTH, 2);
//System.out.format("mpu_read_fifo_stream(), fifo count msb=0x%x, lsb=0x%x%n",
// Byte.valueOf(tmp[0]), Byte.valueOf(tmp[1]));
int fifo_count = ((tmp[0] & 0xff) << 8) | (tmp[1] & 0xff);
//int fifo_count = readUShort(MPU9150_RA_FIFO_COUNTH, SUB_ADDRESS_SIZE_1_BYTE);
if (fifo_count < length) {
//Logger.trace("mpu_read_fifo_stream() fifo_count ({}) < length ({})", fifo_count, length);
return null;
}
//Logger.trace("Got a FIFO packet! fifo_count={}", fifo_count);
if (fifo_count > (MAX_FIFO >> 1)) {
/* FIFO is 50% full, better check overflow bit. */
// int_status == 0x3a == MPU9150_RA_INT_STATUS
byte int_status = i2cDevice.readByte(MPU9150_RA_INT_STATUS);
if ((int_status & BIT_FIFO_OVERFLOW) != 0) {
Logger.info("resetting FIFO as overflowing");
mpu_reset_fifo();
return null;
}
}
// fifo_r_w == 0x74 == MPU9150_RA_FIFO_R_W
byte[] data = i2cDevice.readBytes(MPU9150_RA_FIFO_R_W, length);
// unsigned char more;
short more = (short)(fifo_count / length - 1);
return new FIFOStream(data, more);
}
/**
* Set device to bypass mode.
* @param bypass_on 1 to enable bypass mode.
* @throws RuntimeIOException if an I/O error occurs
*/
public void mpu_set_bypass(boolean bypass_on) throws RuntimeIOException {
/** Was:
// Set i2c bypass enable pin to true to access magnetometer
// MPU9150_RA_INT_PIN_CFG = 0x37, MPU9150_INTCFG_I2C_BYPASS_EN_BIT = 0x02
//writeByte(MPU9150_RA_INT_PIN_CFG, 0x02);
setI2CBypassEnabled(true);
*/
if (bypass_mode != null && bypass_mode.booleanValue() == bypass_on) {
return;
}
byte tmp;
if (bypass_on) {
// user_ctrl == 0x6a == MPU9150_RA_USER_CTRL for MPU-6050
tmp = i2cDevice.readByte(MPU9150_RA_USER_CTRL);
// BIT_AUX_IF_EN == 0x20 (bit 5, I2C_MST_EN, MPU9150_USERCTRL_I2C_MST_EN_BIT)
tmp &= ~BIT_AUX_IF_EN;
i2cDevice.writeByte(MPU9150_RA_USER_CTRL, tmp);
// Can be achieved by this instead:
//setI2CMasterModeEnabled(true);
SleepUtil.sleepMillis(3);
// BIT_BYPASS_EN = 0x02 (bit 1, I2C_BYPASS_EN, MPU9150_INTCFG_I2C_BYPASS_EN_BIT)
tmp = BIT_BYPASS_EN;
if (active_low_int) {
// BIT_ACTL == 0x80 (bit 7, INT_LEVEL, MPU9150_INTCFG_INT_LEVEL_BIT)
tmp |= BIT_ACTL;
}
if (latched_int) {
// BIT_LATCH_EN == 0x20 (bit 5, LATCH_INT_EN)
// BIT_ANY_RD_CLR == 0x10 (bit 4, INT_RD_CLEAR)
tmp |= BIT_LATCH_EN | BIT_ANY_RD_CLR;
}
// int_pin_cfg == 0x37 == MPU9150_RA_INT_PIN_CFG
i2cDevice.writeByte(MPU9150_RA_INT_PIN_CFG, tmp);
} else {
/* Enable I2C master mode if compass is being used. */
tmp = i2cDevice.readByte(MPU9150_RA_USER_CTRL);
if ((sensors & INV_XYZ_COMPASS) != 0) {
tmp |= BIT_AUX_IF_EN;
} else {
tmp &= ~BIT_AUX_IF_EN;
}
i2cDevice.writeByte(MPU9150_RA_USER_CTRL, tmp);
SleepUtil.sleepMillis(3);
if (active_low_int) {
tmp = BIT_ACTL;
} else {
tmp = 0;
}
if (latched_int) {
tmp |= BIT_LATCH_EN | BIT_ANY_RD_CLR;
}
i2cDevice.writeByte(MPU9150_RA_INT_PIN_CFG, tmp);
}
bypass_mode = Boolean.valueOf(bypass_on);
}
/**
* Set interrupt level.
* @param active_low 1 for active low, 0 for active high.
*/
public void mpu_set_int_level(boolean active_low) {
active_low_int = active_low;
}
/**
* Enable latched interrupts.
* Any MPU register will clear the interrupt.
* @param enable 1 to enable, 0 to disable.
* @throws RuntimeIOException if an I/O error occurs
*/
public void mpu_set_int_latched(boolean enable) throws RuntimeIOException {
if (latched_int == enable) {
return;
}
byte tmp;
if (enable) {
tmp = BIT_LATCH_EN | BIT_ANY_RD_CLR;
} else {
tmp = 0;
}
if (bypass_mode != null && bypass_mode.booleanValue()) {
tmp |= BIT_BYPASS_EN;
}
if (active_low_int) {
tmp |= BIT_ACTL;
}
// int_pin_cfg == 0x37 == MPU9150_RA_INT_PIN_CFG
i2cDevice.writeByte(MPU9150_RA_INT_PIN_CFG, tmp);
latched_int = enable;
}
public float[] get_accel_prod_shift() throws RuntimeIOException {
byte[] tmp = new byte[4];
tmp = i2cDevice.readBytes(0x0D, 4);
//if (i2c_read(st.hw->addr, 0x0D, 4, tmp))
// return 0x07;
float[] st_shift = new float[3];
byte[] shift_code = new byte[3];
shift_code[0] = (byte)(((tmp[0] & 0xE0) >> 3) | ((tmp[3] & 0x30) >> 4));
shift_code[1] = (byte)(((tmp[1] & 0xE0) >> 3) | ((tmp[3] & 0x0C) >> 2));
shift_code[2] = (byte)(((tmp[2] & 0xE0) >> 3) | (tmp[3] & 0x03));
for (int ii = 0; ii < 3; ii++) {
if (shift_code[ii] == 0) {
st_shift[ii] = 0.f;
continue;
}
/* Equivalent to..
* st_shift[ii] = 0.34f * powf(0.92f/0.34f, (shift_code[ii]-1) / 30.f)
*/
st_shift[ii] = 0.34f;
while (--shift_code[ii] != 0) {
st_shift[ii] *= 1.034f;
}
}
return st_shift;
}
public void get_st_biases() throws RuntimeIOException {
// TODO Implementation
Logger.error("get_st_biases NOT IMPLEMENTED!");
}
/**
* Write to the DMP memory.
* This function prevents I2C writes past the bank boundaries. The DMP memory
* is only accessible when the chip is awake.
* @param mem_addr Memory location (bank << 8 | start address)
* @param length Number of bytes to write.
* @param data Bytes to write to memory.
* @throws RuntimeIOException if an I/O error occurs
*/
public void mpu_write_mem(int mem_addr, int length, byte[] data) throws RuntimeIOException {
if (sensors == 0) {
Logger.warn("mpu_write_mem(), sensors == 0, returning");
return;
}
byte[] tmp = new byte[2];
// Bank
tmp[0] = (byte)(mem_addr >> 8);
// Start address
tmp[1] = (byte)(mem_addr & 0xFF);
/* Check bank boundaries. */
int start_address = tmp[1] & 0xFF;
if (start_address + length > MPU9150_DMP_MEMORY_BANK_SIZE) {
Logger.error("mpu_write_mem(), check bank boundaries failed");
return;
}
// bank_sel == 0x6D == MPU9150_RA_BANK_SEL
//if (i2c_write(st.hw->addr, st.reg->bank_sel, 2, tmp))
i2cDevice.writeBytes(MPU9150_RA_BANK_SEL, 2, tmp);
// mem_r_w == 0x6F == MPU9150_RA_MEM_R_W
//if (i2c_write(st.hw->addr, st.reg->mem_r_w, length, data))
i2cDevice.writeBytes(MPU9150_RA_MEM_R_W, length, data);
}
/**
* Read from the DMP memory.
* This function prevents I2C reads past the bank boundaries. The DMP memory
* is only accessible when the chip is awake.
* @param mem_addr Memory location (bank << 8 | start address)
* @param length Number of bytes to read.
* @return data Bytes read from memory.
* @throws RuntimeIOException if an I/O error occurs
*/
public byte[] mpu_read_mem(int mem_addr, int length) throws RuntimeIOException {
if (sensors == 0) {
return null;
}
byte[] tmp = new byte[2];
tmp[0] = (byte)(mem_addr >> 8); // memory bank
tmp[1] = (byte)(mem_addr & 0xFF); // start address
int tmp_1_unsigned = tmp[1] & 0xFF;
/* Check bank boundaries. */
if (tmp_1_unsigned + length > MPU9150_DMP_MEMORY_BANK_SIZE) {
Logger.error("mpu_read_mem(), check bank boundaries failed");
return null;
}
// bank_sel == 0x6D == MPU9150_RA_BANK_SEL
//if (i2c_write(st.hw->addr, st.reg->bank_sel, 2, tmp))
i2cDevice.writeBytes(MPU9150_RA_BANK_SEL, 2, tmp);
// mem_r_w == 0x6F == MPU9150_RA_MEM_R_W
//if (i2c_read(st.hw->addr, st.reg->mem_r_w, length, data))
return i2cDevice.readBytes(MPU9150_RA_MEM_R_W, length);
}
/**
* Load and verify DMP image.
* @param length Length of DMP image.
* @param firmware DMP code.
* @param start_addr Starting address of DMP code memory.
* @param sample_rate Fixed sampling rate used when DMP is enabled.
* @throws RuntimeIOException if an I/O error occurs
*/
public void mpu_load_firmware(int length, byte[] firmware, short start_addr, int sample_rate) throws RuntimeIOException {
/* Must divide evenly into st.hw->bank_size to avoid bank crossings. */
if (dmp_loaded) {
/* DMP should only be loaded once. */
Logger.warn("mpu_load_firmware(), DMP already loaded, returning");
return;
}
int LOAD_CHUNK = 16;
int this_write;
for (int ii = 0; ii < length; ii += this_write) {
this_write = Math.min(LOAD_CHUNK, length - ii);
//Logger.trace("mpu_load_firmware, this_write={}", this_write);
/*
if (mpu_write_mem(ii, this_write, (unsigned char*)&firmware[ii]))
return -1;
*/
byte[] chunk = Arrays.copyOfRange(firmware, ii, ii+this_write);
mpu_write_mem(ii, this_write, chunk);
/*
if (mpu_read_mem(ii, this_write, cur))
return -1;
*/
byte[] cur = mpu_read_mem(ii, this_write);
//if (memcmp(firmware+ii, cur, this_write))
// return -2;
if (!Arrays.equals(chunk, cur)) {
Logger.debug("mpu_load_firmware(), mpu_read_mem({}, {}) != data chunk just written", ii, this_write);
}
}
/* Set program start address. */
/*
short[] tmp = new short[2];
tmp[0] = (short)(start_addr >> 8);
tmp[1] = (short)(start_addr & 0xFF);
*/
// prgm_start_h == 0x70 == MPU9150_RA_DMP_CFG_1
i2cDevice.writeShort(MPU9150_RA_DMP_CFG_1, start_addr);
dmp_loaded = true;
dmp_sample_rate = sample_rate;
}
/**
* Enable/disable DMP support.
* @param enable 1 to turn on the DMP.
* @throws RuntimeIOException if an I/O error occurs
*/
public void mpu_set_dmp_state(boolean enable) throws RuntimeIOException {
if (dmp_on == enable) {
return;
}
byte tmp;
if (enable) {
if (!dmp_loaded) {
Logger.warn("mpu_set_dmp_state(), dmp not loaded, returning");
return;
}
/* Disable data ready interrupt. */
set_int_enable(false);
/* Disable bypass mode. */
mpu_set_bypass(false);
/* Keep constant sample rate, FIFO rate controlled by DMP. */
mpu_set_sample_rate(dmp_sample_rate);
/* Remove FIFO elements. */
tmp = 0;
i2cDevice.writeByte(MPU9150_RA_FIFO_EN, tmp);
dmp_on = true;
/* Enable DMP interrupt. */
set_int_enable(true);
mpu_reset_fifo();
} else {
/* Disable DMP interrupt. */
set_int_enable(false);
/* Restore FIFO settings. */
tmp = fifo_enable;
i2cDevice.writeByte(MPU9150_RA_FIFO_EN, tmp);
dmp_on = true;
mpu_reset_fifo();
}
}
/**
* Get DMP state.
* @return enabled true if enabled.
*/
public boolean mpu_get_dmp_state() {
return dmp_on;
}
/* This initialisation is similar to the one in ak8975.c. */
public boolean setup_compass() throws RuntimeIOException {
mpu_set_bypass(true);
/* Find compass. Possible addresses range from 0x0C to 0x0F. */
byte akm_addr = AK8975Driver.AK8975_MAG_ADDRESS;
/* Assume it's on 0x0C...
for (akm_addr = 0x0C; akm_addr <= 0x0F; akm_addr++) {
int result;
result = read(akm_addr, AKM_REG_WHOAMI, 1, data);
if (data[0] == AKM_WHOAMI) {
break;
}
}
*/
if (akm_addr > 0x0F) {
/* TODO: Handle this case in all compass-related functions. */
Logger.warn("Compass not found.");
return false;
}
compass_addr = akm_addr;
magSensor = new AK8975Driver(i2cDevice.getController(), i2cDevice.getAddressSize(), i2cDevice.getClockFrequency(), compass_addr);
magSensor.init();
mpu_set_bypass(false);
/* Set up master mode, master clock, and ES bit. */
byte data = 0x40;
/*
* IST_MST_CLK is Bit3-Bit0
* I2C_MST_CLK I2C Master Clock Speed 8MHz Clock Divider
* 0 348 kHz 23
* 1 333 kHz 24
* 2 320 kHz 25
* 3 308 kHz 26
* 4 296 kHz 27
* 5 286 kHz 28
* 6 276 kHz 29
* 7 267 kHz 30
* 8 258 kHz 31
* 9 500 kHz 16
* 10 471 kHz 17
* 11 444 kHz 18
* 12 421 kHz 19
* 13 400 kHz 20
* 14 381 kHz 21
* 15 364 kHz 22
*/
// i2c_mst == 0x24 == MPU9150_RA_I2C_MST_CTRL
i2cDevice.writeByte(MPU9150_RA_I2C_MST_CTRL, data);
/* Slave 0 reads from AKM data registers. */
data = (byte)(BIT_I2C_READ | compass_addr);
// s0_addr == 0x25 == MPU9150_RA_I2C_SLV0_ADDR
i2cDevice.writeByte(MPU9150_RA_I2C_SLV0_ADDR, data);
/* Compass reads start at this register. */
data = AKM_REG_ST1;
// s0_reg == 0x26 == MPU9150_RA_I2C_SLV0_REG
i2cDevice.writeByte(MPU9150_RA_I2C_SLV0_REG, data);
/* Enable slave 0, 8-byte reads. */
data = BIT_SLAVE_EN | 8;
// s0_ctrl == 0x27 == MPU9150_RA_I2C_SLV0_CTRL
i2cDevice.writeByte(MPU9150_RA_I2C_SLV0_CTRL, data);
/* Slave 1 changes AKM measurement mode. */
data = compass_addr;
// s1_addr == 0x28 == MPU9150_RA_I2C_SLV1_ADDR
i2cDevice.writeByte(MPU9150_RA_I2C_SLV1_ADDR, data);
/* AKM measurement mode register. */
data = AKM_REG_CNTL;
// s1_reg == 0x29 == MPU9150_RA_I2C_SLV1_REG
i2cDevice.writeByte(MPU9150_RA_I2C_SLV1_REG, data);
/* Enable slave 1, 1-byte writes. */
data = BIT_SLAVE_EN | 1;
// s1_ctrl == 0x2A == MPU9150_RA_I2C_SLV1_CTRL
i2cDevice.writeByte(MPU9150_RA_I2C_SLV1_CTRL, data);
/* Set slave 1 data. */
data = AKM_SINGLE_MEASUREMENT;
// s1_do == 0x64 == MPU9150_RA_I2C_SLV1_DO
i2cDevice.writeByte(MPU9150_RA_I2C_SLV1_DO, data);
/* Trigger slave 0 and slave 1 actions at each sample. */
data = 0x03;
// i2c_delay_ctrl == 0x67 == MPU9150_RA_I2C_MST_DELAY_CTRL
i2cDevice.writeByte(MPU9150_RA_I2C_MST_DELAY_CTRL, data);
//#ifdef MPU9150
/* For the MPU9150, the auxiliary I2C bus needs to be set to VDD. */
data = BIT_I2C_MST_VDDIO;
// yg_offs_tc == 0x01 == MPU9150_RA_YG_OFFS_TC
i2cDevice.writeByte(MPU9150_RA_YG_OFFS_TC, data);
//#endif
return true;
}
/**
* Read raw compass data.
* @return data Raw data in hardware units.
* @throws RuntimeIOException if an I/O error occurs
*/
public short[] mpu_get_compass_reg() throws RuntimeIOException {
if ((sensors & INV_XYZ_COMPASS) == 0) {
Logger.warn("mpu_get_compass_reg(), INV_XYZ_COMPASS not set in sensors");
return null;
}
// raw_compass == 0x49 == MPU9150_RA_EXT_SENS_DATA_00
byte[] tmp = i2cDevice.readBytes(MPU9150_RA_EXT_SENS_DATA_00, 8);
/* AK8975 doesn't have the overrun error bit. */
if ((tmp[0] & AKM_DATA_READY) == 0) {
return null;
}
if (((tmp[7] & AKM_OVERFLOW) != 0) || ((tmp[7] & AKM_DATA_ERROR) != 0)) {
return null;
}
short[] data = new short[3];
// Note Little Endian!
data[0] = (short)(((tmp[2] & 0xff) << 8) | (tmp[1] & 0xff));
data[1] = (short)(((tmp[4] & 0xff) << 8) | (tmp[3] & 0xff));
data[2] = (short)(((tmp[6] & 0xff) << 8) | (tmp[5] & 0xff));
short[] mag_sens_adj = magSensor.get_mag_sens_adj();
//System.out.format("mag_sens_adj=(%d, %d, %d)%n", mag_sens_adj[0], mag_sens_adj[1], mag_sens_adj[2]);
// TODO Try to understand this...
data[0] = (short)((data[0] * mag_sens_adj[0]) >> 8);
data[1] = (short)((data[1] * mag_sens_adj[1]) >> 8);
data[2] = (short)((data[2] * mag_sens_adj[2]) >> 8);
return data;
}
/**
* Get the compass full-scale range.
* @return fsr Current full-scale range.
*/
public int mpu_get_compass_fsr() {
return AK8975_FSR;
}
/**
* Enters LP accel motion interrupt mode.
* The behaviour of this feature is very different between the MPU6050 and the
* MPU6500. Each chip's version of this feature is explained below.
*
* The hardware motion threshold can be between 32mg and 8160mg in 32mg
* increments.
*
* Low-power accel mode supports the following frequencies:
* 1.25Hz, 5Hz, 20Hz, 40Hz
*
* MPU6500:
* Unlike the MPU6050 version, the hardware does not "lock in" a reference
* sample. The hardware monitors the accel data and detects any large change
* over a short period of time.
*
* The hardware motion threshold can be between 4mg and 1020mg in 4mg
* increments.
*
* MPU6500 Low-power accel mode supports the following frequencies:
* 1.25Hz, 2.5Hz, 5Hz, 10Hz, 20Hz, 40Hz, 80Hz, 160Hz, 320Hz, 640Hz
*
* NOTES:
* The driver will round down thresh to the nearest supported value if
* an unsupported threshold is selected.
* To select a fractional wake-up frequency, round down the value passed to
* lpa_freq.
* The MPU6500 does not support a delay parameter. If this function is used
* for the MPU6500, the value passed to time will be ignored.
* To disable this mode, set lpa_freq to zero. The driver will restore
* the previous configuration.
*
* @param thresh Motion threshold in mg.
* @param time Duration in milliseconds that the accel data must
* exceed thresh before motion is reported.
* @param lpa_freq Minimum sampling rate, or zero to disable.
* @throws RuntimeIOException if an I/O error occurs
*/
public void mpu_lp_motion_interrupt(int thresh, int time, int lpa_freq) throws RuntimeIOException {
// TODO Implementation
Logger.error("mpu_lp_motion_interrupt NOT IMPLEMENTED!");
}
}
