539 lines
15 KiB
C++
539 lines
15 KiB
C++
////////////////////////////////////////////////////////////////////////////
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//
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// This file is part of RTIMULib
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//
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// Copyright (c) 2014-2015, richards-tech
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy of
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// this software and associated documentation files (the "Software"), to deal in
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// the Software without restriction, including without limitation the rights to use,
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// copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
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// Software, and to permit persons to whom the Software is furnished to do so,
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// subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
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// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
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// PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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// SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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#include "RTIMULSM9DS0.h"
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#include "RTIMUSettings.h"
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// this sets the learning rate for compass running average calculation
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#define COMPASS_ALPHA 0.2f
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RTIMULSM9DS0::RTIMULSM9DS0(RTIMUSettings *settings) : RTIMU(settings)
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{
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m_sampleRate = 100;
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}
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RTIMULSM9DS0::~RTIMULSM9DS0()
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{
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}
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bool RTIMULSM9DS0::IMUInit()
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{
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unsigned char result;
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#ifdef LSM9DS0_CACHE_MODE
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m_firstTime = true;
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m_cacheIn = m_cacheOut = m_cacheCount = 0;
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#endif
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// set validity flags
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m_imuData.fusionPoseValid = false;
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m_imuData.fusionQPoseValid = false;
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m_imuData.gyroValid = true;
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m_imuData.accelValid = true;
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m_imuData.compassValid = true;
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m_imuData.pressureValid = false;
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m_imuData.temperatureValid = false;
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m_imuData.humidityValid = false;
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// configure IMU
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m_gyroSlaveAddr = m_settings->m_I2CSlaveAddress;
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// work out accelmag address
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if (m_settings->HALRead(LSM9DS0_ACCELMAG_ADDRESS0, LSM9DS0_WHO_AM_I, 1, &result, "")) {
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if (result == LSM9DS0_ACCELMAG_ID) {
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m_accelCompassSlaveAddr = LSM9DS0_ACCELMAG_ADDRESS0;
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}
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} else {
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m_accelCompassSlaveAddr = LSM9DS0_ACCELMAG_ADDRESS1;
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}
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setCalibrationData();
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// enable the I2C bus
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if (!m_settings->HALOpen())
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return false;
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// Set up the gyro
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if (!m_settings->HALWrite(m_gyroSlaveAddr, LSM9DS0_GYRO_CTRL5, 0x80, "Failed to boot LSM9DS0"))
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return false;
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if (!m_settings->HALRead(m_gyroSlaveAddr, LSM9DS0_GYRO_WHO_AM_I, 1, &result, "Failed to read LSM9DS0 gyro id"))
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return false;
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if (result != LSM9DS0_GYRO_ID) {
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HAL_ERROR1("Incorrect LSM9DS0 gyro id %d\n", result);
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return false;
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}
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if (!setGyroSampleRate())
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return false;
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if (!setGyroCTRL2())
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return false;
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if (!setGyroCTRL4())
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return false;
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// Set up the accel
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if (!m_settings->HALRead(m_accelCompassSlaveAddr, LSM9DS0_WHO_AM_I, 1, &result, "Failed to read LSM9DS0 accel/mag id"))
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return false;
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if (result != LSM9DS0_ACCELMAG_ID) {
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HAL_ERROR1("Incorrect LSM9DS0 accel/mag id %d\n", result);
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return false;
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}
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if (!setAccelCTRL1())
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return false;
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if (!setAccelCTRL2())
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return false;
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if (!setCompassCTRL5())
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return false;
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if (!setCompassCTRL6())
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return false;
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if (!setCompassCTRL7())
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return false;
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#ifdef LSM9DS0_CACHE_MODE
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// turn on gyro fifo
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if (!m_settings->HALWrite(m_gyroSlaveAddr, LSM9DS0_GYRO_FIFO_CTRL, 0x3f, "Failed to set LSM9DS0 FIFO mode"))
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return false;
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#endif
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if (!setGyroCTRL5())
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return false;
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gyroBiasInit();
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HAL_INFO("LSM9DS0 init complete\n");
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return true;
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}
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bool RTIMULSM9DS0::setGyroSampleRate()
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{
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unsigned char ctrl1;
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switch (m_settings->m_LSM9DS0GyroSampleRate) {
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case LSM9DS0_GYRO_SAMPLERATE_95:
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ctrl1 = 0x0f;
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m_sampleRate = 95;
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break;
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case LSM9DS0_GYRO_SAMPLERATE_190:
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ctrl1 = 0x4f;
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m_sampleRate = 190;
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break;
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case LSM9DS0_GYRO_SAMPLERATE_380:
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ctrl1 = 0x8f;
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m_sampleRate = 380;
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break;
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case LSM9DS0_GYRO_SAMPLERATE_760:
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ctrl1 = 0xcf;
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m_sampleRate = 760;
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break;
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default:
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HAL_ERROR1("Illegal LSM9DS0 gyro sample rate code %d\n", m_settings->m_LSM9DS0GyroSampleRate);
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return false;
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}
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m_sampleInterval = (uint64_t)1000000 / m_sampleRate;
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switch (m_settings->m_LSM9DS0GyroBW) {
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case LSM9DS0_GYRO_BANDWIDTH_0:
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ctrl1 |= 0x00;
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break;
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case LSM9DS0_GYRO_BANDWIDTH_1:
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ctrl1 |= 0x10;
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break;
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case LSM9DS0_GYRO_BANDWIDTH_2:
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ctrl1 |= 0x20;
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break;
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case LSM9DS0_GYRO_BANDWIDTH_3:
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ctrl1 |= 0x30;
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break;
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}
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return (m_settings->HALWrite(m_gyroSlaveAddr, LSM9DS0_GYRO_CTRL1, ctrl1, "Failed to set LSM9DS0 gyro CTRL1"));
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}
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bool RTIMULSM9DS0::setGyroCTRL2()
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{
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if ((m_settings->m_LSM9DS0GyroHpf < LSM9DS0_GYRO_HPF_0) || (m_settings->m_LSM9DS0GyroHpf > LSM9DS0_GYRO_HPF_9)) {
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HAL_ERROR1("Illegal LSM9DS0 gyro high pass filter code %d\n", m_settings->m_LSM9DS0GyroHpf);
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return false;
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}
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return m_settings->HALWrite(m_gyroSlaveAddr, LSM9DS0_GYRO_CTRL2, m_settings->m_LSM9DS0GyroHpf, "Failed to set LSM9DS0 gyro CTRL2");
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}
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bool RTIMULSM9DS0::setGyroCTRL4()
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{
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unsigned char ctrl4;
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switch (m_settings->m_LSM9DS0GyroFsr) {
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case LSM9DS0_GYRO_FSR_250:
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ctrl4 = 0x00;
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m_gyroScale = (RTFLOAT)0.00875 * RTMATH_DEGREE_TO_RAD;
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break;
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case LSM9DS0_GYRO_FSR_500:
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ctrl4 = 0x10;
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m_gyroScale = (RTFLOAT)0.0175 * RTMATH_DEGREE_TO_RAD;
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break;
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case LSM9DS0_GYRO_FSR_2000:
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ctrl4 = 0x20;
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m_gyroScale = (RTFLOAT)0.07 * RTMATH_DEGREE_TO_RAD;
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break;
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default:
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HAL_ERROR1("Illegal LSM9DS0 gyro FSR code %d\n", m_settings->m_LSM9DS0GyroFsr);
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return false;
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}
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return m_settings->HALWrite(m_gyroSlaveAddr, LSM9DS0_GYRO_CTRL4, ctrl4, "Failed to set LSM9DS0 gyro CTRL4");
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}
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bool RTIMULSM9DS0::setGyroCTRL5()
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{
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unsigned char ctrl5;
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// Turn on hpf
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ctrl5 = 0x10;
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#ifdef LSM9DS0_CACHE_MODE
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// turn on fifo
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ctrl5 |= 0x40;
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#endif
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return m_settings->HALWrite(m_gyroSlaveAddr, LSM9DS0_GYRO_CTRL5, ctrl5, "Failed to set LSM9DS0 gyro CTRL5");
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}
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bool RTIMULSM9DS0::setAccelCTRL1()
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{
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unsigned char ctrl1;
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if ((m_settings->m_LSM9DS0AccelSampleRate < 0) || (m_settings->m_LSM9DS0AccelSampleRate > 10)) {
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HAL_ERROR1("Illegal LSM9DS0 accel sample rate code %d\n", m_settings->m_LSM9DS0AccelSampleRate);
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return false;
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}
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ctrl1 = (m_settings->m_LSM9DS0AccelSampleRate << 4) | 0x07;
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return m_settings->HALWrite(m_accelCompassSlaveAddr, LSM9DS0_CTRL1, ctrl1, "Failed to set LSM9DS0 accell CTRL1");
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}
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bool RTIMULSM9DS0::setAccelCTRL2()
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{
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unsigned char ctrl2;
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if ((m_settings->m_LSM9DS0AccelLpf < 0) || (m_settings->m_LSM9DS0AccelLpf > 3)) {
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HAL_ERROR1("Illegal LSM9DS0 accel low pass fiter code %d\n", m_settings->m_LSM9DS0AccelLpf);
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return false;
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}
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switch (m_settings->m_LSM9DS0AccelFsr) {
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case LSM9DS0_ACCEL_FSR_2:
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m_accelScale = (RTFLOAT)0.000061;
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break;
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case LSM9DS0_ACCEL_FSR_4:
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m_accelScale = (RTFLOAT)0.000122;
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break;
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case LSM9DS0_ACCEL_FSR_6:
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m_accelScale = (RTFLOAT)0.000183;
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break;
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case LSM9DS0_ACCEL_FSR_8:
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m_accelScale = (RTFLOAT)0.000244;
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break;
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case LSM9DS0_ACCEL_FSR_16:
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m_accelScale = (RTFLOAT)0.000732;
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break;
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default:
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HAL_ERROR1("Illegal LSM9DS0 accel FSR code %d\n", m_settings->m_LSM9DS0AccelFsr);
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return false;
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}
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ctrl2 = (m_settings->m_LSM9DS0AccelLpf << 6) | (m_settings->m_LSM9DS0AccelFsr << 3);
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return m_settings->HALWrite(m_accelCompassSlaveAddr, LSM9DS0_CTRL2, ctrl2, "Failed to set LSM9DS0 accel CTRL2");
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}
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bool RTIMULSM9DS0::setCompassCTRL5()
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{
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unsigned char ctrl5;
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if ((m_settings->m_LSM9DS0CompassSampleRate < 0) || (m_settings->m_LSM9DS0CompassSampleRate > 5)) {
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HAL_ERROR1("Illegal LSM9DS0 compass sample rate code %d\n", m_settings->m_LSM9DS0CompassSampleRate);
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return false;
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}
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ctrl5 = (m_settings->m_LSM9DS0CompassSampleRate << 2);
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#ifdef LSM9DS0_CACHE_MODE
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// enable fifo
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ctrl5 |= 0x40;
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#endif
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return m_settings->HALWrite(m_accelCompassSlaveAddr, LSM9DS0_CTRL5, ctrl5, "Failed to set LSM9DS0 compass CTRL5");
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}
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bool RTIMULSM9DS0::setCompassCTRL6()
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{
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unsigned char ctrl6;
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// convert FSR to uT
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switch (m_settings->m_LSM9DS0CompassFsr) {
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case LSM9DS0_COMPASS_FSR_2:
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ctrl6 = 0;
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m_compassScale = (RTFLOAT)0.008;
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break;
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case LSM9DS0_COMPASS_FSR_4:
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ctrl6 = 0x20;
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m_compassScale = (RTFLOAT)0.016;
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break;
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case LSM9DS0_COMPASS_FSR_8:
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ctrl6 = 0x40;
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m_compassScale = (RTFLOAT)0.032;
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break;
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case LSM9DS0_COMPASS_FSR_12:
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ctrl6 = 0x60;
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m_compassScale = (RTFLOAT)0.0479;
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break;
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default:
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HAL_ERROR1("Illegal LSM9DS0 compass FSR code %d\n", m_settings->m_LSM9DS0CompassFsr);
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return false;
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}
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return m_settings->HALWrite(m_accelCompassSlaveAddr, LSM9DS0_CTRL6, ctrl6, "Failed to set LSM9DS0 compass CTRL6");
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}
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bool RTIMULSM9DS0::setCompassCTRL7()
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{
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return m_settings->HALWrite(m_accelCompassSlaveAddr, LSM9DS0_CTRL7, 0x60, "Failed to set LSM9DS0CTRL7");
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}
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int RTIMULSM9DS0::IMUGetPollInterval()
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{
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return (400 / m_sampleRate);
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}
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bool RTIMULSM9DS0::IMURead()
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{
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unsigned char status;
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unsigned char gyroData[6];
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unsigned char accelData[6];
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unsigned char compassData[6];
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#ifdef LSM9DS0_CACHE_MODE
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int count;
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if (!m_settings->HALRead(m_gyroSlaveAddr, LSM9DS0_GYRO_FIFO_SRC, 1, &status, "Failed to read LSM9DS0 gyro fifo status"))
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return false;
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if ((status & 0x40) != 0) {
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HAL_INFO("LSM9DS0 gyro fifo overrun\n");
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if (!m_settings->HALWrite(m_gyroSlaveAddr, LSM9DS0_GYRO_CTRL5, 0x10, "Failed to set LSM9DS0 gyro CTRL5"))
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return false;
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if (!m_settings->HALWrite(m_gyroSlaveAddr, LSM9DS0_GYRO_FIFO_CTRL, 0x0, "Failed to set LSM9DS0 gyro FIFO mode"))
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return false;
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if (!m_settings->HALWrite(m_gyroSlaveAddr, LSM9DS0_GYRO_FIFO_CTRL, 0x3f, "Failed to set LSM9DS0 gyro FIFO mode"))
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return false;
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if (!setGyroCTRL5())
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return false;
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m_imuData.timestamp += m_sampleInterval * 32;
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return false;
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}
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// get count of samples in fifo
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count = status & 0x1f;
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if ((m_cacheCount == 0) && (count > 0) && (count < LSM9DS0_FIFO_THRESH)) {
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// special case of a small fifo and nothing cached - just handle as simple read
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if (!m_settings->HALRead(m_gyroSlaveAddr, 0x80 | LSM9DS0_GYRO_OUT_X_L, 6, gyroData, "Failed to read LSM9DS0 gyro data"))
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return false;
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if (!m_settings->HALRead(m_accelCompassSlaveAddr, 0x80 | LSM9DS0_OUT_X_L_A, 6, accelData, "Failed to read LSM9DS0 accel data"))
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return false;
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if (!m_settings->HALRead(m_accelCompassSlaveAddr, 0x80 | LSM9DS0_OUT_X_L_M, 6, compassData, "Failed to read LSM9DS0 compass data"))
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return false;
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if (m_firstTime)
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m_imuData.timestamp = RTMath::currentUSecsSinceEpoch();
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else
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m_imuData.timestamp += m_sampleInterval;
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m_firstTime = false;
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} else {
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if (count >= LSM9DS0_FIFO_THRESH) {
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// need to create a cache block
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if (m_cacheCount == LSM9DS0_CACHE_BLOCK_COUNT) {
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// all cache blocks are full - discard oldest and update timestamp to account for lost samples
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m_imuData.timestamp += m_sampleInterval * m_cache[m_cacheOut].count;
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if (++m_cacheOut == LSM9DS0_CACHE_BLOCK_COUNT)
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m_cacheOut = 0;
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m_cacheCount--;
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}
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if (!m_settings->HALRead(m_gyroSlaveAddr, 0x80 | LSM9DS0_GYRO_OUT_X_L, LSM9DS0_FIFO_CHUNK_SIZE * LSM9DS0_FIFO_THRESH,
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m_cache[m_cacheIn].data, "Failed to read LSM9DS0 fifo data"))
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return false;
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if (!m_settings->HALRead(m_accelCompassSlaveAddr, 0x80 | LSM9DS0_OUT_X_L_A, 6,
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m_cache[m_cacheIn].accel, "Failed to read LSM9DS0 accel data"))
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return false;
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if (!m_settings->HALRead(m_accelCompassSlaveAddr, 0x80 | LSM9DS0_OUT_X_L_M, 6,
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m_cache[m_cacheIn].compass, "Failed to read LSM9DS0 compass data"))
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return false;
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m_cache[m_cacheIn].count = LSM9DS0_FIFO_THRESH;
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m_cache[m_cacheIn].index = 0;
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m_cacheCount++;
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if (++m_cacheIn == LSM9DS0_CACHE_BLOCK_COUNT)
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m_cacheIn = 0;
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}
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// now fifo has been read if necessary, get something to process
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if (m_cacheCount == 0)
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return false;
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memcpy(gyroData, m_cache[m_cacheOut].data + m_cache[m_cacheOut].index, LSM9DS0_FIFO_CHUNK_SIZE);
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memcpy(accelData, m_cache[m_cacheOut].accel, 6);
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memcpy(compassData, m_cache[m_cacheOut].compass, 6);
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m_cache[m_cacheOut].index += LSM9DS0_FIFO_CHUNK_SIZE;
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if (--m_cache[m_cacheOut].count == 0) {
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// this cache block is now empty
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if (++m_cacheOut == LSM9DS0_CACHE_BLOCK_COUNT)
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m_cacheOut = 0;
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m_cacheCount--;
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}
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if (m_firstTime)
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m_imuData.timestamp = RTMath::currentUSecsSinceEpoch();
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else
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m_imuData.timestamp += m_sampleInterval;
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m_firstTime = false;
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}
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#else
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if (!m_settings->HALRead(m_gyroSlaveAddr, LSM9DS0_GYRO_STATUS, 1, &status, "Failed to read LSM9DS0 status"))
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|
return false;
|
|
|
|
if ((status & 0x8) == 0)
|
|
return false;
|
|
|
|
if (!m_settings->HALRead(m_gyroSlaveAddr, 0x80 | LSM9DS0_GYRO_OUT_X_L, 6, gyroData, "Failed to read LSM9DS0 gyro data"))
|
|
return false;
|
|
|
|
m_imuData.timestamp = RTMath::currentUSecsSinceEpoch();
|
|
|
|
if (!m_settings->HALRead(m_accelCompassSlaveAddr, 0x80 | LSM9DS0_OUT_X_L_A, 6, accelData, "Failed to read LSM9DS0 accel data"))
|
|
return false;
|
|
|
|
if (!m_settings->HALRead(m_accelCompassSlaveAddr, 0x80 | LSM9DS0_OUT_X_L_M, 6, compassData, "Failed to read LSM9DS0 compass data"))
|
|
return false;
|
|
|
|
#endif
|
|
|
|
RTMath::convertToVector(gyroData, m_imuData.gyro, m_gyroScale, false);
|
|
RTMath::convertToVector(accelData, m_imuData.accel, m_accelScale, false);
|
|
RTMath::convertToVector(compassData, m_imuData.compass, m_compassScale, false);
|
|
|
|
// sort out gyro axes and correct for bias
|
|
|
|
m_imuData.gyro.setX(m_imuData.gyro.x());
|
|
m_imuData.gyro.setY(-m_imuData.gyro.y());
|
|
m_imuData.gyro.setZ(-m_imuData.gyro.z());
|
|
|
|
// sort out accel data;
|
|
|
|
m_imuData.accel.setX(-m_imuData.accel.x());
|
|
|
|
// sort out compass axes
|
|
|
|
m_imuData.compass.setY(-m_imuData.compass.y());
|
|
|
|
// now do standard processing
|
|
|
|
handleGyroBias();
|
|
calibrateAverageCompass();
|
|
calibrateAccel();
|
|
|
|
// now update the filter
|
|
|
|
updateFusion();
|
|
|
|
return true;
|
|
}
|