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MPU6050.cpp
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MPU6050.cpp
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/*
MPU6050.cpp - Class file for the MPU6050 Triple Axis Gyroscope & Accelerometer Arduino Library.
Version: 1.0.3
(c) 2014-2015 Korneliusz Jarzebski
www.jarzebski.pl
This program is free software: you can redistribute it and/or modify
it under the terms of the version 3 GNU General Public License as
published by the Free Software Foundation.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#if ARDUINO >= 100
#include "Arduino.h"
#else
#include "WProgram.h"
#endif
#include <Wire.h>
#include <math.h>
#include <MPU6050.h>
bool MPU6050::begin(mpu6050_dps_t scale, mpu6050_range_t range, int mpua)
{
// Set Address
mpuAddress = mpua;
Wire.begin();
// Reset calibrate values
dg.XAxis = 0;
dg.YAxis = 0;
dg.ZAxis = 0;
useCalibrate = false;
// Reset threshold values
tg.XAxis = 0;
tg.YAxis = 0;
tg.ZAxis = 0;
actualThreshold = 0;
// Check MPU6050 Who Am I Register
if (fastRegister8(MPU6050_REG_WHO_AM_I) != 0x68)
{
return false;
}
// Set Clock Source
setClockSource(MPU6050_CLOCK_PLL_XGYRO);
// Set Scale & Range
setScale(scale);
setRange(range);
// Disable Sleep Mode
setSleepEnabled(false);
return true;
}
void MPU6050::setScale(mpu6050_dps_t scale)
{
uint8_t value;
switch (scale)
{
case MPU6050_SCALE_250DPS:
dpsPerDigit = .007633f;
break;
case MPU6050_SCALE_500DPS:
dpsPerDigit = .015267f;
break;
case MPU6050_SCALE_1000DPS:
dpsPerDigit = .030487f;
break;
case MPU6050_SCALE_2000DPS:
dpsPerDigit = .060975f;
break;
default:
break;
}
value = readRegister8(MPU6050_REG_GYRO_CONFIG);
value &= 0b11100111;
value |= (scale << 3);
writeRegister8(MPU6050_REG_GYRO_CONFIG, value);
}
mpu6050_dps_t MPU6050::getScale(void)
{
uint8_t value;
value = readRegister8(MPU6050_REG_GYRO_CONFIG);
value &= 0b00011000;
value >>= 3;
return (mpu6050_dps_t)value;
}
void MPU6050::setRange(mpu6050_range_t range)
{
uint8_t value;
switch (range)
{
case MPU6050_RANGE_2G:
rangePerDigit = .000061f;
break;
case MPU6050_RANGE_4G:
rangePerDigit = .000122f;
break;
case MPU6050_RANGE_8G:
rangePerDigit = .000244f;
break;
case MPU6050_RANGE_16G:
rangePerDigit = .0004882f;
break;
default:
break;
}
value = readRegister8(MPU6050_REG_ACCEL_CONFIG);
value &= 0b11100111;
value |= (range << 3);
writeRegister8(MPU6050_REG_ACCEL_CONFIG, value);
}
mpu6050_range_t MPU6050::getRange(void)
{
uint8_t value;
value = readRegister8(MPU6050_REG_ACCEL_CONFIG);
value &= 0b00011000;
value >>= 3;
return (mpu6050_range_t)value;
}
void MPU6050::setDHPFMode(mpu6050_dhpf_t dhpf)
{
uint8_t value;
value = readRegister8(MPU6050_REG_ACCEL_CONFIG);
value &= 0b11111000;
value |= dhpf;
writeRegister8(MPU6050_REG_ACCEL_CONFIG, value);
}
void MPU6050::setDLPFMode(mpu6050_dlpf_t dlpf)
{
uint8_t value;
value = readRegister8(MPU6050_REG_CONFIG);
value &= 0b11111000;
value |= dlpf;
writeRegister8(MPU6050_REG_CONFIG, value);
}
void MPU6050::setClockSource(mpu6050_clockSource_t source)
{
uint8_t value;
value = readRegister8(MPU6050_REG_PWR_MGMT_1);
value &= 0b11111000;
value |= source;
writeRegister8(MPU6050_REG_PWR_MGMT_1, value);
}
mpu6050_clockSource_t MPU6050::getClockSource(void)
{
uint8_t value;
value = readRegister8(MPU6050_REG_PWR_MGMT_1);
value &= 0b00000111;
return (mpu6050_clockSource_t)value;
}
bool MPU6050::getSleepEnabled(void)
{
return readRegisterBit(MPU6050_REG_PWR_MGMT_1, 6);
}
void MPU6050::setSleepEnabled(bool state)
{
writeRegisterBit(MPU6050_REG_PWR_MGMT_1, 6, state);
}
bool MPU6050::getIntZeroMotionEnabled(void)
{
return readRegisterBit(MPU6050_REG_INT_ENABLE, 5);
}
void MPU6050::setIntZeroMotionEnabled(bool state)
{
writeRegisterBit(MPU6050_REG_INT_ENABLE, 5, state);
}
bool MPU6050::getIntMotionEnabled(void)
{
return readRegisterBit(MPU6050_REG_INT_ENABLE, 6);
}
void MPU6050::setIntMotionEnabled(bool state)
{
writeRegisterBit(MPU6050_REG_INT_ENABLE, 6, state);
}
bool MPU6050::getIntFreeFallEnabled(void)
{
return readRegisterBit(MPU6050_REG_INT_ENABLE, 7);
}
void MPU6050::setIntFreeFallEnabled(bool state)
{
writeRegisterBit(MPU6050_REG_INT_ENABLE, 7, state);
}
uint8_t MPU6050::getMotionDetectionThreshold(void)
{
return readRegister8(MPU6050_REG_MOT_THRESHOLD);
}
void MPU6050::setMotionDetectionThreshold(uint8_t threshold)
{
writeRegister8(MPU6050_REG_MOT_THRESHOLD, threshold);
}
uint8_t MPU6050::getMotionDetectionDuration(void)
{
return readRegister8(MPU6050_REG_MOT_DURATION);
}
void MPU6050::setMotionDetectionDuration(uint8_t duration)
{
writeRegister8(MPU6050_REG_MOT_DURATION, duration);
}
uint8_t MPU6050::getZeroMotionDetectionThreshold(void)
{
return readRegister8(MPU6050_REG_ZMOT_THRESHOLD);
}
void MPU6050::setZeroMotionDetectionThreshold(uint8_t threshold)
{
writeRegister8(MPU6050_REG_ZMOT_THRESHOLD, threshold);
}
uint8_t MPU6050::getZeroMotionDetectionDuration(void)
{
return readRegister8(MPU6050_REG_ZMOT_DURATION);
}
void MPU6050::setZeroMotionDetectionDuration(uint8_t duration)
{
writeRegister8(MPU6050_REG_ZMOT_DURATION, duration);
}
uint8_t MPU6050::getFreeFallDetectionThreshold(void)
{
return readRegister8(MPU6050_REG_FF_THRESHOLD);
}
void MPU6050::setFreeFallDetectionThreshold(uint8_t threshold)
{
writeRegister8(MPU6050_REG_FF_THRESHOLD, threshold);
}
uint8_t MPU6050::getFreeFallDetectionDuration(void)
{
return readRegister8(MPU6050_REG_FF_DURATION);
}
void MPU6050::setFreeFallDetectionDuration(uint8_t duration)
{
writeRegister8(MPU6050_REG_FF_DURATION, duration);
}
bool MPU6050::getI2CMasterModeEnabled(void)
{
return readRegisterBit(MPU6050_REG_USER_CTRL, 5);
}
void MPU6050::setI2CMasterModeEnabled(bool state)
{
writeRegisterBit(MPU6050_REG_USER_CTRL, 5, state);
}
void MPU6050::setI2CBypassEnabled(bool state)
{
return writeRegisterBit(MPU6050_REG_INT_PIN_CFG, 1, state);
}
bool MPU6050::getI2CBypassEnabled(void)
{
return readRegisterBit(MPU6050_REG_INT_PIN_CFG, 1);
}
void MPU6050::setAccelPowerOnDelay(mpu6050_onDelay_t delay)
{
uint8_t value;
value = readRegister8(MPU6050_REG_MOT_DETECT_CTRL);
value &= 0b11001111;
value |= (delay << 4);
writeRegister8(MPU6050_REG_MOT_DETECT_CTRL, value);
}
mpu6050_onDelay_t MPU6050::getAccelPowerOnDelay(void)
{
uint8_t value;
value = readRegister8(MPU6050_REG_MOT_DETECT_CTRL);
value &= 0b00110000;
return (mpu6050_onDelay_t)(value >> 4);
}
uint8_t MPU6050::getIntStatus(void)
{
return readRegister8(MPU6050_REG_INT_STATUS);
}
Activites MPU6050::readActivites(void)
{
uint8_t data = readRegister8(MPU6050_REG_INT_STATUS);
a.isOverflow = ((data >> 4) & 1);
a.isFreeFall = ((data >> 7) & 1);
a.isInactivity = ((data >> 5) & 1);
a.isActivity = ((data >> 6) & 1);
a.isDataReady = ((data >> 0) & 1);
data = readRegister8(MPU6050_REG_MOT_DETECT_STATUS);
a.isNegActivityOnX = ((data >> 7) & 1);
a.isPosActivityOnX = ((data >> 6) & 1);
a.isNegActivityOnY = ((data >> 5) & 1);
a.isPosActivityOnY = ((data >> 4) & 1);
a.isNegActivityOnZ = ((data >> 3) & 1);
a.isPosActivityOnZ = ((data >> 2) & 1);
return a;
}
Vector MPU6050::readRawAccel(void)
{
Wire.beginTransmission(mpuAddress);
#if ARDUINO >= 100
Wire.write(MPU6050_REG_ACCEL_XOUT_H);
#else
Wire.send(MPU6050_REG_ACCEL_XOUT_H);
#endif
Wire.endTransmission();
Wire.beginTransmission(mpuAddress);
Wire.requestFrom(mpuAddress, 6);
while (Wire.available() < 6);
#if ARDUINO >= 100
uint8_t xha = Wire.read();
uint8_t xla = Wire.read();
uint8_t yha = Wire.read();
uint8_t yla = Wire.read();
uint8_t zha = Wire.read();
uint8_t zla = Wire.read();
#else
uint8_t xha = Wire.receive();
uint8_t xla = Wire.receive();
uint8_t yha = Wire.receive();
uint8_t yla = Wire.receive();
uint8_t zha = Wire.receive();
uint8_t zla = Wire.receive();
#endif
ra.XAxis = (int16_t)(xha << 8 | xla);
ra.YAxis = (int16_t)(yha << 8 | yla);
ra.ZAxis = (int16_t)(zha << 8 | zla);
return ra;
}
Vector MPU6050::readNormalizeAccel(void)
{
readRawAccel();
na.XAxis = ra.XAxis * rangePerDigit * 9.80665f;
na.YAxis = ra.YAxis * rangePerDigit * 9.80665f;
na.ZAxis = ra.ZAxis * rangePerDigit * 9.80665f;
return na;
}
Vector MPU6050::readScaledAccel(void)
{
readRawAccel();
na.XAxis = ra.XAxis * rangePerDigit;
na.YAxis = ra.YAxis * rangePerDigit;
na.ZAxis = ra.ZAxis * rangePerDigit;
return na;
}
Vector MPU6050::readRawGyro(void)
{
Wire.beginTransmission(mpuAddress);
#if ARDUINO >= 100
Wire.write(MPU6050_REG_GYRO_XOUT_H);
#else
Wire.send(MPU6050_REG_GYRO_XOUT_H);
#endif
Wire.endTransmission();
Wire.beginTransmission(mpuAddress);
Wire.requestFrom(mpuAddress, 6);
while (Wire.available() < 6);
#if ARDUINO >= 100
uint8_t xha = Wire.read();
uint8_t xla = Wire.read();
uint8_t yha = Wire.read();
uint8_t yla = Wire.read();
uint8_t zha = Wire.read();
uint8_t zla = Wire.read();
#else
uint8_t xha = Wire.receive();
uint8_t xla = Wire.receive();
uint8_t yha = Wire.receive();
uint8_t yla = Wire.receive();
uint8_t zha = Wire.receive();
uint8_t zla = Wire.receive();
#endif
rg.XAxis = (int16_t)(xha << 8 | xla);
rg.YAxis = (int16_t)(yha << 8 | yla);
rg.ZAxis = (int16_t)(zha << 8 | zla);
return rg;
}
Vector MPU6050::readNormalizeGyro(void)
{
readRawGyro();
if (useCalibrate)
{
ng.XAxis = (rg.XAxis - dg.XAxis) * dpsPerDigit;
ng.YAxis = (rg.YAxis - dg.YAxis) * dpsPerDigit;
ng.ZAxis = (rg.ZAxis - dg.ZAxis) * dpsPerDigit;
} else
{
ng.XAxis = rg.XAxis * dpsPerDigit;
ng.YAxis = rg.YAxis * dpsPerDigit;
ng.ZAxis = rg.ZAxis * dpsPerDigit;
}
if (actualThreshold)
{
if (abs(ng.XAxis) < tg.XAxis) ng.XAxis = 0;
if (abs(ng.YAxis) < tg.YAxis) ng.YAxis = 0;
if (abs(ng.ZAxis) < tg.ZAxis) ng.ZAxis = 0;
}
return ng;
}
float MPU6050::readTemperature(void)
{
int16_t T;
T = readRegister16(MPU6050_REG_TEMP_OUT_H);
return (float)T/340 + 36.53;
}
int16_t MPU6050::getGyroOffsetX(void)
{
return readRegister16(MPU6050_REG_GYRO_XOFFS_H);
}
int16_t MPU6050::getGyroOffsetY(void)
{
return readRegister16(MPU6050_REG_GYRO_YOFFS_H);
}
int16_t MPU6050::getGyroOffsetZ(void)
{
return readRegister16(MPU6050_REG_GYRO_ZOFFS_H);
}
void MPU6050::setGyroOffsetX(int16_t offset)
{
writeRegister16(MPU6050_REG_GYRO_XOFFS_H, offset);
}
void MPU6050::setGyroOffsetY(int16_t offset)
{
writeRegister16(MPU6050_REG_GYRO_YOFFS_H, offset);
}
void MPU6050::setGyroOffsetZ(int16_t offset)
{
writeRegister16(MPU6050_REG_GYRO_ZOFFS_H, offset);
}
int16_t MPU6050::getAccelOffsetX(void)
{
return readRegister16(MPU6050_REG_ACCEL_XOFFS_H);
}
int16_t MPU6050::getAccelOffsetY(void)
{
return readRegister16(MPU6050_REG_ACCEL_YOFFS_H);
}
int16_t MPU6050::getAccelOffsetZ(void)
{
return readRegister16(MPU6050_REG_ACCEL_ZOFFS_H);
}
void MPU6050::setAccelOffsetX(int16_t offset)
{
writeRegister16(MPU6050_REG_ACCEL_XOFFS_H, offset);
}
void MPU6050::setAccelOffsetY(int16_t offset)
{
writeRegister16(MPU6050_REG_ACCEL_YOFFS_H, offset);
}
void MPU6050::setAccelOffsetZ(int16_t offset)
{
writeRegister16(MPU6050_REG_ACCEL_ZOFFS_H, offset);
}
// Calibrate algorithm
void MPU6050::calibrateGyro(uint8_t samples)
{
// Set calibrate
useCalibrate = true;
// Reset values
float sumX = 0;
float sumY = 0;
float sumZ = 0;
float sigmaX = 0;
float sigmaY = 0;
float sigmaZ = 0;
// Read n-samples
for (uint8_t i = 0; i < samples; ++i)
{
readRawGyro();
sumX += rg.XAxis;
sumY += rg.YAxis;
sumZ += rg.ZAxis;
sigmaX += rg.XAxis * rg.XAxis;
sigmaY += rg.YAxis * rg.YAxis;
sigmaZ += rg.ZAxis * rg.ZAxis;
delay(5);
}
// Calculate delta vectors
dg.XAxis = sumX / samples;
dg.YAxis = sumY / samples;
dg.ZAxis = sumZ / samples;
// Calculate threshold vectors
th.XAxis = sqrt((sigmaX / samples) - (dg.XAxis * dg.XAxis));
th.YAxis = sqrt((sigmaY / samples) - (dg.YAxis * dg.YAxis));
th.ZAxis = sqrt((sigmaZ / samples) - (dg.ZAxis * dg.ZAxis));
// If already set threshold, recalculate threshold vectors
if (actualThreshold > 0)
{
setThreshold(actualThreshold);
}
}
// Get current threshold value
uint8_t MPU6050::getThreshold(void)
{
return actualThreshold;
}
// Set treshold value
void MPU6050::setThreshold(uint8_t multiple)
{
if (multiple > 0)
{
// If not calibrated, need calibrate
if (!useCalibrate)
{
calibrateGyro();
}
// Calculate threshold vectors
tg.XAxis = th.XAxis * multiple;
tg.YAxis = th.YAxis * multiple;
tg.ZAxis = th.ZAxis * multiple;
} else
{
// No threshold
tg.XAxis = 0;
tg.YAxis = 0;
tg.ZAxis = 0;
}
// Remember old threshold value
actualThreshold = multiple;
}
// Fast read 8-bit from register
uint8_t MPU6050::fastRegister8(uint8_t reg)
{
uint8_t value;
Wire.beginTransmission(mpuAddress);
#if ARDUINO >= 100
Wire.write(reg);
#else
Wire.send(reg);
#endif
Wire.endTransmission();
Wire.beginTransmission(mpuAddress);
Wire.requestFrom(mpuAddress, 1);
#if ARDUINO >= 100
value = Wire.read();
#else
value = Wire.receive();
#endif;
Wire.endTransmission();
return value;
}
// Read 8-bit from register
uint8_t MPU6050::readRegister8(uint8_t reg)
{
uint8_t value;
Wire.beginTransmission(mpuAddress);
#if ARDUINO >= 100
Wire.write(reg);
#else
Wire.send(reg);
#endif
Wire.endTransmission();
Wire.beginTransmission(mpuAddress);
Wire.requestFrom(mpuAddress, 1);
while(!Wire.available()) {};
#if ARDUINO >= 100
value = Wire.read();
#else
value = Wire.receive();
#endif;
Wire.endTransmission();
return value;
}
// Write 8-bit to register
void MPU6050::writeRegister8(uint8_t reg, uint8_t value)
{
Wire.beginTransmission(mpuAddress);
#if ARDUINO >= 100
Wire.write(reg);
Wire.write(value);
#else
Wire.send(reg);
Wire.send(value);
#endif
Wire.endTransmission();
}
int16_t MPU6050::readRegister16(uint8_t reg)
{
int16_t value;
Wire.beginTransmission(mpuAddress);
#if ARDUINO >= 100
Wire.write(reg);
#else
Wire.send(reg);
#endif
Wire.endTransmission();
Wire.beginTransmission(mpuAddress);
Wire.requestFrom(mpuAddress, 2);
while(!Wire.available()) {};
#if ARDUINO >= 100
uint8_t vha = Wire.read();
uint8_t vla = Wire.read();
#else
uint8_t vha = Wire.receive();
uint8_t vla = Wire.receive();
#endif;
Wire.endTransmission();
value = vha << 8 | vla;
return value;
}
void MPU6050::writeRegister16(uint8_t reg, int16_t value)
{
Wire.beginTransmission(mpuAddress);
#if ARDUINO >= 100
Wire.write(reg);
Wire.write((uint8_t)(value >> 8));
Wire.write((uint8_t)value);
#else
Wire.send(reg);
Wire.send((uint8_t)(value >> 8));
Wire.send((uint8_t)value);
#endif
Wire.endTransmission();
}
// Read register bit
bool MPU6050::readRegisterBit(uint8_t reg, uint8_t pos)
{
uint8_t value;
value = readRegister8(reg);
return ((value >> pos) & 1);
}
// Write register bit
void MPU6050::writeRegisterBit(uint8_t reg, uint8_t pos, bool state)
{
uint8_t value;
value = readRegister8(reg);
if (state)
{
value |= (1 << pos);
} else
{
value &= ~(1 << pos);
}
writeRegister8(reg, value);
}