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imu_fusion
Dependencies: ICM20602_I2C IMU_fusion QMC5883L ledControl2 mbed
Fork of IMU_fusion by
main.cpp
- Committer:
- sarahbest
- Date:
- 2017-07-19
- Revision:
- 3:788eecfd5ae9
- Parent:
- 2:3881894aaff5
File content as of revision 3:788eecfd5ae9:
/* Calculating Roll, Pitch and Yaw angles from IMU * * @author: Baser Kandehir * @date: August 5, 2015 * @license: MIT license * * Copyright (c) 2015, Baser Kandehir, baser.kandehir@ieee.metu.edu.tr * * 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. * * @description of the program: * * Program can calculate roll, pitch and yaw angles from the raw data that comes * from IMU. Yaw angle is compensated for tilt. All the angles are sent to the matlab * for further processing. * */ #include "mbed.h" #include "QMC5883L.h" #include "icm20602_i2c.h" #include "ledControl.h" Serial pc(USBTX,USBRX); ICM20602 icm20602; QMC5883L qmc5883l; Ticker toggler1; Ticker filter; Ticker compass; enum detect_orientation_return { DETECT_ORIENTATION_UPSIDE_DOWN, DETECT_ORIENTATION_RIGHTSIDE_UP, DETECT_ORIENTATION_LEFT, DETECT_ORIENTATION_RIGHT, DETECT_ORIENTATION_TAIL_DOWN, DETECT_ORIENTATION_NOSE_DOWN, DETECT_ORIENTATION_ERROR }; void toggle_led1(); void toggle_led2(); //void compFilter(); void read_IMU_data(); void read_MAG_data(); void IMU_calibration(); void IMU_compensate(); char detect_orientation(float acc_dete[3], float gyro_dete[3]); //void tiltCompensatedAngle(); float pitchAngle = 0; float rollAngle = 0; float yawAngle = 0; float acc[3]; float gyro[3]; float acc_comp[3]; float gyro_comp[3]; float acc_off[3]; float gyro_off[3]; float mag[3]; float IMU_tmp; float mag_tmp; const char cali = 'c'; const char coll = ' '; char orientation; int main() { pc.baud(9600); // baud rate: 9600 icm20602.whoAmI(); // Communication test: WHO_AM_I register reading qmc5883l.ChipID(); // icm20602.calibrate(accelBias,gyroBias); // Calibrate MPU6050 and load biases into bias registers // filter.attach(&compFilter, 2); // Call the complementaryFilter func. every 5 ms (200 Hz sampling period) // compass.attach(&tiltCompensatedAngle, 0.015); // Call the tiltCompensatedAngle func. every 15 ms (75 Hz sampling period) icm20602.init(); qmc5883l.init(); while(1) { // pc.putc(pc.getc()); // pc.printf("%c\n",pc.getc()); //if(pc.getc()==cali) // { // pc.printf("calibrate IMU!\n"); // IMU_calibration(); //// break; // }else{ // while(1) { read_IMU_data(); read_MAG_data(); IMU_compensate(); // pc.printf("%.5f,%.5f\r\n",aRes,gRes); // send data to matlab pc.printf("original data:%.5f,%.5f,%.5f,%.5f,%.5f,%.5f,%.5f,%.5f,%.5f,%.5f,%.5f\r\n",acc[0],acc[1],acc[2],gyro[0],gyro[1],gyro[2],IMU_tmp,mag[0],mag[1],mag[2],mag_tmp); // pc.printf("original acc:%.5f,%.5f,%.5f\r\n",acc[0],acc[1],acc[2]); // send data to matlab // pc.printf("original gyro:%.5f,%.5f,%.5f\r\n",gyro[0],gyro[1],gyro[2]); // send data to matlab // pc.printf("compensated acc:%.5f,%.5f,%.5f\r\n",acc_comp[0],acc_comp[1],acc_comp[2]); // send data to matlab // pc.printf("compensated gyro:%.5f,%.5f,%.5f\r\n",gyro_comp[0],gyro_comp[1],gyro_comp[2]); // send data to matlab // pc.printf("mag:%.5f,%.5f,%.5f\r\n",mag[0],mag[1],mag[2]); // send data to matlab // wait_ms(400); // ledToggle(3); // } // } } } void toggle_led1() {ledToggle(1);} void toggle_led2() {ledToggle(2);} /* This function is created to avoid address error that caused from Ticker.attach func */ //void compFilter() {icm20602.complementaryFilter(&pitchAngle, &rollAngle);} //void read_imu() {icm20602.read_IMU_data(&acc[3], &gyro[3]);} /* Tilt compensated compass data */ // Works well for tilt in +/- 50 deg range //void tiltCompensatedAngle() //{ // float mag_Data[3], Xh, Yh; // hmc5883l.readMagData(mag_Data); // // Xh = mag_Data[0] * cos(rollAngle*PI/180) - mag_Data[2] * sin(rollAngle*PI/180) ; // // Yh = mag_Data[0] * sin(pitchAngle*PI/180) * sin(rollAngle*PI/180) + // mag_Data[1] * cos(pitchAngle*PI/180) - // mag_Data[2] * sin(pitchAngle*PI/180) * cos(rollAngle*PI/180) ; // // /* Calculate the compensated heading angle */ // double heading = atan2(Yh, Xh); // // // After calculating heading declination angle should be added to heading which is the error of the magnetic field in specific location. // // declinationAngle can be found here http://www.magnetic-declination.com/ // // For Ankara (my location) declinationAngle is ~5.5 degrees (0.096 radians) // float declinationAngle = 0.096; // heading += declinationAngle; // // // Correct for when signs are reversed. // if(heading < 0) // heading += 2*PI; // // // Check for wrap due to addition of declination. // if(heading > 2*PI) // heading -= 2*PI; // // /* Convert radian to degrees */ // heading = heading * 180 / PI; // // yawAngle = heading; //} void read_IMU_data() { acc[0] = icm20602.getAccXvalue() * IMU_ONE_G * aRes; acc[1] = icm20602.getAccYvalue() * IMU_ONE_G * aRes; acc[2] = icm20602.getAccZvalue() * IMU_ONE_G * aRes; gyro[0] = icm20602.getGyrXvalue() * gRes; gyro[1] = icm20602.getGyrYvalue() * gRes; gyro[2] = icm20602.getGyrZvalue() * gRes; IMU_tmp = icm20602.getIMUTemp() / 262.144;//326.8; // pc.printf("acc0:%.5f,%.5f,%.5f\r\n",acc[0],acc[1],acc[2]); // send data to matlab } void read_MAG_data() { mag[0] = qmc5883l.getMagXvalue() * mRes; mag[1] = qmc5883l.getMagYvalue() * mRes; mag[2] = qmc5883l.getMagZvalue() * mRes; mag_tmp = qmc5883l.getMagTemp() /262.144;// 100; // pc.printf("mag:%.5f,%.5f,%.5f\r\n",mag[0],mag[1],mag[2]); // send data to matlab } void IMU_calibration(){ int ii,jj,i=1,counter=0,timer=10; float acc_cal[6][3]; float gyro_cal[6][3]; //float acc_sum[3]; // float gyro_sum[3]; pc.printf("put the IMU still!\n"); for(i=0;i<6;i++){ if(pc.getc()==coll){ pc.printf("%dst side start\n",i+1); float acc_sum[3]={0}; float gyro_sum[3]={0}; while(counter < timer){ read_IMU_data(); acc_sum[0] += acc[0]; acc_sum[1] += acc[1]; acc_sum[2] += acc[2]; gyro_sum[0] += gyro[0]; gyro_sum[1] += gyro[1]; gyro_sum[2] += gyro[2]; counter++; //pc.printf(" acc :%.5f,%.5f,%.5f\r\n",acc[0],acc[1],acc[2]); // send data to matlab // pc.printf(" gyro :%.5f,%.5f,%.5f\r\n",gyro[0],gyro[1],gyro[2]); // send data to matlab // pc.printf(" acc sum:%.5f,%.5f,%.5f\r\n",acc_sum[0],acc_sum[1],acc_sum[2]); // send data to matlab // pc.printf(" gyro sum:%.5f,%.5f,%.5f\r\n",gyro_sum[0],gyro_sum[1],gyro_sum[2]); // send data to matlab // pc.printf("%d----\n",counter); } //pc.printf(" acc :%.5f,%.5f,%.5f\r\n",acc[0],acc[1],acc[2]); // send data to matlab // pc.printf(" gyro :%.5f,%.5f,%.5f\r\n",gyro[0],gyro[1],gyro[2]); // send data to matlab acc_cal[i][0] = acc_sum[0]/timer; acc_cal[i][1] = acc_sum[1]/timer; acc_cal[i][2] = acc_sum[2]/timer; gyro_cal[i][0] = gyro_sum[0]/timer; gyro_cal[i][1] = gyro_sum[1]/timer; gyro_cal[i][2] = gyro_sum[2]/timer; pc.printf("%d--counter\n",counter); counter = 0; //acc_sum[0] =0.0;acc_sum[1] =0.0;acc_sum[2] =0.0; // gyro_sum[0] = 0.0;gyro_sum[1] = 0.0;gyro_sum[2] = 0.0; //pc.printf(" acc sum:%.5f,%.5f,%.5f\r\n",acc_cal[i][0],acc_cal[i][1],acc_cal[i][2]); // send data to matlab // pc.printf(" gyro sum:%.5f,%.5f,%.5f\r\n",gyro_cal[i][0],gyro_cal[i][1],gyro_cal[i][2]); // send data to matlab orientation = detect_orientation(acc_cal[i],gyro_cal[i]); pc.printf("%cst side completed\n",orientation); } } //calculate the offset and scale for(ii = 0;ii<3;ii++) { for(jj=0;jj<6;jj++){ acc_off[ii] += acc_cal[jj][ii]; gyro_off[ii] += gyro_cal[jj][ii]; } // pc.printf(" acc offset sum:%.5f,%.5f,%.5f\r\n",acc_off[0],acc_off[1],acc_off[2]); // send data to matlab // pc.printf(" gyro offset sum:%.5f,%.5f,%.5f\r\n",gyro_off[0],gyro_off[1],gyro_off[2]); // send data to matlab acc_off[ii]/=6; gyro_off[ii]/=6; } //pc.printf(" acc offset:%.5f,%.5f,%.5f\r\n",acc_off[0],acc_off[1],acc_off[2]); // send data to matlab // pc.printf(" gyro offset:%.5f,%.5f,%.5f\r\n",gyro_off[0],gyro_off[1],gyro_off[2]); // send data to matlab return; } char detect_orientation(float acc_dete[3], float gyro_dete[3]) { if(fabsf(acc_dete[0]) < 1.0 && fabsf(acc_dete[1]) < 1.0 && fabsf(acc_dete[2] - IMU_ONE_G) < 1.0){ return DETECT_ORIENTATION_UPSIDE_DOWN;//[0 0 g] }else if(fabsf(acc_dete[0]) < 1.0 && fabsf(acc_dete[1]) < 1.0 && fabsf(acc_dete[2] + IMU_ONE_G) < 1.0){ return DETECT_ORIENTATION_RIGHTSIDE_UP;//[0 0 -g] }else if(fabsf(acc_dete[0]) < 1.0 && fabsf(acc_dete[1] - IMU_ONE_G) < 1.0 && fabsf(acc_dete[2]) < 1.0){ return DETECT_ORIENTATION_LEFT;//[0 g 0] }else if(fabsf(acc_dete[0]) < 1.0 && fabsf(acc_dete[1] + IMU_ONE_G) < 1.0 && fabsf(acc_dete[2]) < 1.0){ return DETECT_ORIENTATION_RIGHT;//[0 -g 0] }else if(fabsf(acc_dete[0] - IMU_ONE_G) < 1.0 && fabsf(acc_dete[1]) < 1.0 && fabsf(acc_dete[2]) < 1.0){ return DETECT_ORIENTATION_TAIL_DOWN;//[g 0 0] }else if(fabsf(acc_dete[0] + IMU_ONE_G) < 1.0 && fabsf(acc_dete[1]) < 1.0 && fabsf(acc_dete[2]) < 1.0){ return DETECT_ORIENTATION_NOSE_DOWN;//[-g 0 0] }else{ return DETECT_ORIENTATION_ERROR; } } void IMU_compensate() { int k; for(k=0;k<3;k++) { acc_comp[k] = acc[k] - acc_off[k]; gyro_comp[k] = gyro[k] - gyro_off[k]; } }