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author | Hyon Lim (Retina) <limhyon@gmail.com> | 2013-05-29 00:45:02 +1000 |
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committer | Hyon Lim (Retina) <limhyon@gmail.com> | 2013-05-29 00:45:02 +1000 |
commit | 7a2adb22eb3ebec5fd90d1d4fbce3f5dbd61bb3c (patch) | |
tree | 0abb580d293a0d2ea1cc4d7b0913623a82dd67b5 /src | |
parent | 279028ede47f3f63bddc5896db4a2c2385bbb1cf (diff) | |
download | px4-firmware-7a2adb22eb3ebec5fd90d1d4fbce3f5dbd61bb3c.tar.gz px4-firmware-7a2adb22eb3ebec5fd90d1d4fbce3f5dbd61bb3c.tar.bz2 px4-firmware-7a2adb22eb3ebec5fd90d1d4fbce3f5dbd61bb3c.zip |
Visualization code has been added.
Diffstat (limited to 'src')
10 files changed, 1882 insertions, 2 deletions
diff --git a/src/modules/attitude_estimator_so3_comp/README b/src/modules/attitude_estimator_so3_comp/README new file mode 100644 index 000000000..26b270d37 --- /dev/null +++ b/src/modules/attitude_estimator_so3_comp/README @@ -0,0 +1,5 @@ +Synopsis + + nsh> attitude_estimator_so3_comp start -d /dev/ttyS1 -b 115200 + +Option -d is for debugging packet. See visualization_code folder. diff --git a/src/modules/attitude_estimator_so3_comp/attitude_estimator_so3_comp_params.c b/src/modules/attitude_estimator_so3_comp/attitude_estimator_so3_comp_params.c index 068e4340a..1d5e0670a 100755 --- a/src/modules/attitude_estimator_so3_comp/attitude_estimator_so3_comp_params.c +++ b/src/modules/attitude_estimator_so3_comp/attitude_estimator_so3_comp_params.c @@ -1,7 +1,19 @@ /* + * Author: Hyon Lim <limhyon@gmail.com, hyonlim@snu.ac.kr> + * * @file attitude_estimator_so3_comp_params.c * - * Parameters for SO3 complementary filter + * Implementation of nonlinear complementary filters on the SO(3). + * This code performs attitude estimation by using accelerometer, gyroscopes and magnetometer. + * Result is provided as quaternion, 1-2-3 Euler angle and rotation matrix. + * + * Theory of nonlinear complementary filters on the SO(3) is based on [1]. + * Quaternion realization of [1] is based on [2]. + * Optmized quaternion update code is based on Sebastian Madgwick's implementation. + * + * References + * [1] Mahony, R.; Hamel, T.; Pflimlin, Jean-Michel, "Nonlinear Complementary Filters on the Special Orthogonal Group," Automatic Control, IEEE Transactions on , vol.53, no.5, pp.1203,1218, June 2008 + * [2] Euston, M.; Coote, P.; Mahony, R.; Jonghyuk Kim; Hamel, T., "A complementary filter for attitude estimation of a fixed-wing UAV," Intelligent Robots and Systems, 2008. IROS 2008. IEEE/RSJ International Conference on , vol., no., pp.340,345, 22-26 Sept. 2008 */ #include "attitude_estimator_so3_comp_params.h" diff --git a/src/modules/attitude_estimator_so3_comp/attitude_estimator_so3_comp_params.h b/src/modules/attitude_estimator_so3_comp/attitude_estimator_so3_comp_params.h index 2fccec61c..f00695630 100755 --- a/src/modules/attitude_estimator_so3_comp/attitude_estimator_so3_comp_params.h +++ b/src/modules/attitude_estimator_so3_comp/attitude_estimator_so3_comp_params.h @@ -1,7 +1,19 @@ /* + * Author: Hyon Lim <limhyon@gmail.com, hyonlim@snu.ac.kr> + * * @file attitude_estimator_so3_comp_params.h * - * Parameters for EKF filter + * Implementation of nonlinear complementary filters on the SO(3). + * This code performs attitude estimation by using accelerometer, gyroscopes and magnetometer. + * Result is provided as quaternion, 1-2-3 Euler angle and rotation matrix. + * + * Theory of nonlinear complementary filters on the SO(3) is based on [1]. + * Quaternion realization of [1] is based on [2]. + * Optmized quaternion update code is based on Sebastian Madgwick's implementation. + * + * References + * [1] Mahony, R.; Hamel, T.; Pflimlin, Jean-Michel, "Nonlinear Complementary Filters on the Special Orthogonal Group," Automatic Control, IEEE Transactions on , vol.53, no.5, pp.1203,1218, June 2008 + * [2] Euston, M.; Coote, P.; Mahony, R.; Jonghyuk Kim; Hamel, T., "A complementary filter for attitude estimation of a fixed-wing UAV," Intelligent Robots and Systems, 2008. IROS 2008. IEEE/RSJ International Conference on , vol., no., pp.340,345, 22-26 Sept. 2008 */ #include <systemlib/param/param.h> diff --git a/src/modules/attitude_estimator_so3_comp/visualization_code/FreeIMU_cube/FreeIMU_cube.pde b/src/modules/attitude_estimator_so3_comp/visualization_code/FreeIMU_cube/FreeIMU_cube.pde new file mode 100644 index 000000000..3706437d3 --- /dev/null +++ b/src/modules/attitude_estimator_so3_comp/visualization_code/FreeIMU_cube/FreeIMU_cube.pde @@ -0,0 +1,265 @@ +/** +Visualize a cube which will assumes the orientation described +in a quaternion coming from the serial port. + +INSTRUCTIONS: +This program has to be run when you have the FreeIMU_serial +program running on your Arduino and the Arduino connected to your PC. +Remember to set the serialPort variable below to point to the name the +Arduino serial port has in your system. You can get the port using the +Arduino IDE from Tools->Serial Port: the selected entry is what you have +to use as serialPort variable. + + +Copyright (C) 2011-2012 Fabio Varesano - http://www.varesano.net/ + +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/>. + +*/ + +import processing.serial.*; +import processing.opengl.*; + +Serial myPort; // Create object from Serial class + +final String serialPort = "/dev/ttyUSB9"; // replace this with your serial port. On windows you will need something like "COM1". + +float [] q = new float [4]; +float [] hq = null; +float [] Euler = new float [3]; // psi, theta, phi + +int lf = 10; // 10 is '\n' in ASCII +byte[] inBuffer = new byte[22]; // this is the number of chars on each line from the Arduino (including /r/n) + +PFont font; +final int VIEW_SIZE_X = 800, VIEW_SIZE_Y = 600; + +final int burst = 32; +int count = 0; + +void myDelay(int time) { + try { + Thread.sleep(time); + } catch (InterruptedException e) { } +} + +void setup() +{ + size(VIEW_SIZE_X, VIEW_SIZE_Y, OPENGL); + myPort = new Serial(this, serialPort, 115200); + + // The font must be located in the sketch's "data" directory to load successfully + font = loadFont("CourierNew36.vlw"); + + println("Waiting IMU.."); + + myPort.clear(); + + while (myPort.available() == 0) { + myPort.write("v"); + myDelay(1000); + } + println(myPort.readStringUntil('\n')); + myPort.write("q" + char(burst)); + myPort.bufferUntil('\n'); +} + + +float decodeFloat(String inString) { + byte [] inData = new byte[4]; + + if(inString.length() == 8) { + inData[0] = (byte) unhex(inString.substring(0, 2)); + inData[1] = (byte) unhex(inString.substring(2, 4)); + inData[2] = (byte) unhex(inString.substring(4, 6)); + inData[3] = (byte) unhex(inString.substring(6, 8)); + } + + int intbits = (inData[3] << 24) | ((inData[2] & 0xff) << 16) | ((inData[1] & 0xff) << 8) | (inData[0] & 0xff); + return Float.intBitsToFloat(intbits); +} + +void serialEvent(Serial p) { + if(p.available() >= 18) { + String inputString = p.readStringUntil('\n'); + //print(inputString); + if (inputString != null && inputString.length() > 0) { + String [] inputStringArr = split(inputString, ","); + if(inputStringArr.length >= 5) { // q1,q2,q3,q4,\r\n so we have 5 elements + q[0] = decodeFloat(inputStringArr[0]); + q[1] = decodeFloat(inputStringArr[1]); + q[2] = decodeFloat(inputStringArr[2]); + q[3] = decodeFloat(inputStringArr[3]); + } + } + count = count + 1; + if(burst == count) { // ask more data when burst completed + p.write("q" + char(burst)); + count = 0; + } + } +} + + + +void buildBoxShape() { + //box(60, 10, 40); + noStroke(); + beginShape(QUADS); + + //Z+ (to the drawing area) + fill(#00ff00); + vertex(-30, -5, 20); + vertex(30, -5, 20); + vertex(30, 5, 20); + vertex(-30, 5, 20); + + //Z- + fill(#0000ff); + vertex(-30, -5, -20); + vertex(30, -5, -20); + vertex(30, 5, -20); + vertex(-30, 5, -20); + + //X- + fill(#ff0000); + vertex(-30, -5, -20); + vertex(-30, -5, 20); + vertex(-30, 5, 20); + vertex(-30, 5, -20); + + //X+ + fill(#ffff00); + vertex(30, -5, -20); + vertex(30, -5, 20); + vertex(30, 5, 20); + vertex(30, 5, -20); + + //Y- + fill(#ff00ff); + vertex(-30, -5, -20); + vertex(30, -5, -20); + vertex(30, -5, 20); + vertex(-30, -5, 20); + + //Y+ + fill(#00ffff); + vertex(-30, 5, -20); + vertex(30, 5, -20); + vertex(30, 5, 20); + vertex(-30, 5, 20); + + endShape(); +} + + +void drawCube() { + pushMatrix(); + translate(VIEW_SIZE_X/2, VIEW_SIZE_Y/2 + 50, 0); + scale(5,5,5); + + // a demonstration of the following is at + // http://www.varesano.net/blog/fabio/ahrs-sensor-fusion-orientation-filter-3d-graphical-rotating-cube + rotateZ(-Euler[2]); + rotateX(-Euler[1]); + rotateY(-Euler[0]); + + buildBoxShape(); + + popMatrix(); +} + + +void draw() { + background(#000000); + fill(#ffffff); + + if(hq != null) { // use home quaternion + quaternionToEuler(quatProd(hq, q), Euler); + text("Disable home position by pressing \"n\"", 20, VIEW_SIZE_Y - 30); + } + else { + quaternionToEuler(q, Euler); + text("Point FreeIMU's X axis to your monitor then press \"h\"", 20, VIEW_SIZE_Y - 30); + } + + textFont(font, 20); + textAlign(LEFT, TOP); + text("Q:\n" + q[0] + "\n" + q[1] + "\n" + q[2] + "\n" + q[3], 20, 20); + text("Euler Angles:\nYaw (psi) : " + degrees(Euler[0]) + "\nPitch (theta): " + degrees(Euler[1]) + "\nRoll (phi) : " + degrees(Euler[2]), 200, 20); + + drawCube(); + //myPort.write("q" + 1); +} + + +void keyPressed() { + if(key == 'h') { + println("pressed h"); + + // set hq the home quaternion as the quatnion conjugate coming from the sensor fusion + hq = quatConjugate(q); + + } + else if(key == 'n') { + println("pressed n"); + hq = null; + } +} + +// See Sebastian O.H. Madwick report +// "An efficient orientation filter for inertial and intertial/magnetic sensor arrays" Chapter 2 Quaternion representation + +void quaternionToEuler(float [] q, float [] euler) { + euler[0] = atan2(2 * q[1] * q[2] - 2 * q[0] * q[3], 2 * q[0]*q[0] + 2 * q[1] * q[1] - 1); // psi + euler[1] = -asin(2 * q[1] * q[3] + 2 * q[0] * q[2]); // theta + euler[2] = atan2(2 * q[2] * q[3] - 2 * q[0] * q[1], 2 * q[0] * q[0] + 2 * q[3] * q[3] - 1); // phi +} + +float [] quatProd(float [] a, float [] b) { + float [] q = new float[4]; + + q[0] = a[0] * b[0] - a[1] * b[1] - a[2] * b[2] - a[3] * b[3]; + q[1] = a[0] * b[1] + a[1] * b[0] + a[2] * b[3] - a[3] * b[2]; + q[2] = a[0] * b[2] - a[1] * b[3] + a[2] * b[0] + a[3] * b[1]; + q[3] = a[0] * b[3] + a[1] * b[2] - a[2] * b[1] + a[3] * b[0]; + + return q; +} + +// returns a quaternion from an axis angle representation +float [] quatAxisAngle(float [] axis, float angle) { + float [] q = new float[4]; + + float halfAngle = angle / 2.0; + float sinHalfAngle = sin(halfAngle); + q[0] = cos(halfAngle); + q[1] = -axis[0] * sinHalfAngle; + q[2] = -axis[1] * sinHalfAngle; + q[3] = -axis[2] * sinHalfAngle; + + return q; +} + +// return the quaternion conjugate of quat +float [] quatConjugate(float [] quat) { + float [] conj = new float[4]; + + conj[0] = quat[0]; + conj[1] = -quat[1]; + conj[2] = -quat[2]; + conj[3] = -quat[3]; + + return conj; +} + diff --git a/src/modules/attitude_estimator_so3_comp/visualization_code/FreeIMU_cube/LICENSE.txt b/src/modules/attitude_estimator_so3_comp/visualization_code/FreeIMU_cube/LICENSE.txt new file mode 100644 index 000000000..94a9ed024 --- /dev/null +++ b/src/modules/attitude_estimator_so3_comp/visualization_code/FreeIMU_cube/LICENSE.txt @@ -0,0 +1,674 @@ + GNU GENERAL PUBLIC LICENSE + Version 3, 29 June 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/> + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU General Public License is a free, copyleft license for +software and other kinds of works. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. 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But first, please read +<http://www.gnu.org/philosophy/why-not-lgpl.html>. diff --git a/src/modules/attitude_estimator_so3_comp/visualization_code/FreeIMU_cube/data/CourierNew36.vlw b/src/modules/attitude_estimator_so3_comp/visualization_code/FreeIMU_cube/data/CourierNew36.vlw Binary files differnew file mode 100644 index 000000000..904771486 --- /dev/null +++ b/src/modules/attitude_estimator_so3_comp/visualization_code/FreeIMU_cube/data/CourierNew36.vlw diff --git a/src/modules/attitude_estimator_so3_comp/visualization_code/FreeIMU_yaw_pitch_roll/FreeIMU_yaw_pitch_roll.pde b/src/modules/attitude_estimator_so3_comp/visualization_code/FreeIMU_yaw_pitch_roll/FreeIMU_yaw_pitch_roll.pde new file mode 100644 index 000000000..02afed971 --- /dev/null +++ b/src/modules/attitude_estimator_so3_comp/visualization_code/FreeIMU_yaw_pitch_roll/FreeIMU_yaw_pitch_roll.pde @@ -0,0 +1,229 @@ +/** +Visualize orientation information from a FreeIMU device + +INSTRUCTIONS: +This program has to be run when you have the FreeIMU_serial +program running on your Arduino and the Arduino connected to your PC. +Remember to set the serialPort variable below to point to the name the +Arduino serial port has in your system. You can get the port using the +Arduino IDE from Tools->Serial Port: the selected entry is what you have +to use as serialPort variable. + +Copyright (C) 2011-2012 Fabio Varesano - http://www.varesano.net/ + +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/>. + +*/ + +import processing.serial.*; + +Serial myPort; // Create object from Serial class + + +float [] q = new float [4]; +float [] Euler = new float [3]; // psi, theta, phi + +int lf = 10; // 10 is '\n' in ASCII +byte[] inBuffer = new byte[22]; // this is the number of chars on each line from the Arduino (including /r/n) + +PFont font; +final int VIEW_SIZE_X = 800, VIEW_SIZE_Y = 600; + +int burst = 32, count = 0; + +void myDelay(int time) { + try { + Thread.sleep(time); + } catch (InterruptedException e) { } +} + +void setup() +{ + size(VIEW_SIZE_X, VIEW_SIZE_Y, P3D); + myPort = new Serial(this, "/dev/ttyUSB9", 115200); + + // The font must be located in the sketch's "data" directory to load successfully + font = loadFont("CourierNew36.vlw"); + + println("Waiting IMU.."); + + myPort.clear(); + + while (myPort.available() == 0) { + myPort.write("v"); + myDelay(1000); + } + println(myPort.readStringUntil('\n')); + myPort.write("q" + char(burst)); + myPort.bufferUntil('\n'); +} + + +float decodeFloat(String inString) { + byte [] inData = new byte[4]; + + if(inString.length() == 8) { + inData[0] = (byte) unhex(inString.substring(0, 2)); + inData[1] = (byte) unhex(inString.substring(2, 4)); + inData[2] = (byte) unhex(inString.substring(4, 6)); + inData[3] = (byte) unhex(inString.substring(6, 8)); + } + + int intbits = (inData[3] << 24) | ((inData[2] & 0xff) << 16) | ((inData[1] & 0xff) << 8) | (inData[0] & 0xff); + return Float.intBitsToFloat(intbits); +} + + +void serialEvent(Serial p) { + if(p.available() >= 18) { + String inputString = p.readStringUntil('\n'); + //print(inputString); + if (inputString != null && inputString.length() > 0) { + String [] inputStringArr = split(inputString, ","); + if(inputStringArr.length >= 5) { // q1,q2,q3,q4,\r\n so we have 5 elements + q[0] = decodeFloat(inputStringArr[0]); + q[1] = decodeFloat(inputStringArr[1]); + q[2] = decodeFloat(inputStringArr[2]); + q[3] = decodeFloat(inputStringArr[3]); + } + } + count = count + 1; + if(burst == count) { // ask more data when burst completed + p.write("q" + char(burst)); + count = 0; + } + } +} + + + +void buildBoxShape() { + //box(60, 10, 40); + noStroke(); + beginShape(QUADS); + + //Z+ (to the drawing area) + fill(#00ff00); + vertex(-30, -5, 20); + vertex(30, -5, 20); + vertex(30, 5, 20); + vertex(-30, 5, 20); + + //Z- + fill(#0000ff); + vertex(-30, -5, -20); + vertex(30, -5, -20); + vertex(30, 5, -20); + vertex(-30, 5, -20); + + //X- + fill(#ff0000); + vertex(-30, -5, -20); + vertex(-30, -5, 20); + vertex(-30, 5, 20); + vertex(-30, 5, -20); + + //X+ + fill(#ffff00); + vertex(30, -5, -20); + vertex(30, -5, 20); + vertex(30, 5, 20); + vertex(30, 5, -20); + + //Y- + fill(#ff00ff); + vertex(-30, -5, -20); + vertex(30, -5, -20); + vertex(30, -5, 20); + vertex(-30, -5, 20); + + //Y+ + fill(#00ffff); + vertex(-30, 5, -20); + vertex(30, 5, -20); + vertex(30, 5, 20); + vertex(-30, 5, 20); + + endShape(); +} + + +void drawcompass(float heading, int circlex, int circley, int circlediameter) { + noStroke(); + ellipse(circlex, circley, circlediameter, circlediameter); + fill(#ff0000); + ellipse(circlex, circley, circlediameter/20, circlediameter/20); + stroke(#ff0000); + strokeWeight(4); + line(circlex, circley, circlex - circlediameter/2 * sin(-heading), circley - circlediameter/2 * cos(-heading)); + noStroke(); + fill(#ffffff); + textAlign(CENTER, BOTTOM); + text("N", circlex, circley - circlediameter/2 - 10); + textAlign(CENTER, TOP); + text("S", circlex, circley + circlediameter/2 + 10); + textAlign(RIGHT, CENTER); + text("W", circlex - circlediameter/2 - 10, circley); + textAlign(LEFT, CENTER); + text("E", circlex + circlediameter/2 + 10, circley); +} + + +void drawAngle(float angle, int circlex, int circley, int circlediameter, String title) { + angle = angle + PI/2; + + noStroke(); + ellipse(circlex, circley, circlediameter, circlediameter); + fill(#ff0000); + strokeWeight(4); + stroke(#ff0000); + line(circlex - circlediameter/2 * sin(angle), circley - circlediameter/2 * cos(angle), circlex + circlediameter/2 * sin(angle), circley + circlediameter/2 * cos(angle)); + noStroke(); + fill(#ffffff); + textAlign(CENTER, BOTTOM); + text(title, circlex, circley - circlediameter/2 - 30); +} + +void draw() { + + quaternionToYawPitchRoll(q, Euler); + + background(#000000); + fill(#ffffff); + + textFont(font, 20); + //float temp_decoded = 35.0 + ((float) (temp + 13200)) / 280; + //text("temp:\n" + temp_decoded + " C", 350, 250); + textAlign(LEFT, TOP); + text("Q:\n" + q[0] + "\n" + q[1] + "\n" + q[2] + "\n" + q[3], 20, 10); + text("Euler Angles:\nYaw (psi) : " + degrees(Euler[0]) + "\nPitch (theta): " + degrees(Euler[1]) + "\nRoll (phi) : " + degrees(Euler[2]), 200, 10); + + drawcompass(Euler[0], VIEW_SIZE_X/2 - 250, VIEW_SIZE_Y/2, 200); + drawAngle(Euler[1], VIEW_SIZE_X/2, VIEW_SIZE_Y/2, 200, "Pitch:"); + drawAngle(Euler[2], VIEW_SIZE_X/2 + 250, VIEW_SIZE_Y/2, 200, "Roll:"); +} + + +void quaternionToYawPitchRoll(float [] q, float [] ypr) { + float gx, gy, gz; // estimated gravity direction + + gx = 2 * (q[1]*q[3] - q[0]*q[2]); + gy = 2 * (q[0]*q[1] + q[2]*q[3]); + gz = q[0]*q[0] - q[1]*q[1] - q[2]*q[2] + q[3]*q[3]; + + ypr[0] = atan2(2 * q[1] * q[2] - 2 * q[0] * q[3], 2 * q[0]*q[0] + 2 * q[1] * q[1] - 1); + ypr[1] = atan2(gx, sqrt(gy*gy + gz*gz)); + ypr[2] = atan2(gy, sqrt(gx*gx + gz*gz)); +} + + diff --git a/src/modules/attitude_estimator_so3_comp/visualization_code/FreeIMU_yaw_pitch_roll/LICENSE.txt b/src/modules/attitude_estimator_so3_comp/visualization_code/FreeIMU_yaw_pitch_roll/LICENSE.txt new file mode 100644 index 000000000..94a9ed024 --- /dev/null +++ b/src/modules/attitude_estimator_so3_comp/visualization_code/FreeIMU_yaw_pitch_roll/LICENSE.txt @@ -0,0 +1,674 @@ + GNU GENERAL PUBLIC LICENSE + Version 3, 29 June 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/> + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU General Public License is a free, copyleft license for +software and other kinds of works. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. 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But first, please read +<http://www.gnu.org/philosophy/why-not-lgpl.html>. diff --git a/src/modules/attitude_estimator_so3_comp/visualization_code/FreeIMU_yaw_pitch_roll/data/CourierNew36.vlw b/src/modules/attitude_estimator_so3_comp/visualization_code/FreeIMU_yaw_pitch_roll/data/CourierNew36.vlw Binary files differnew file mode 100644 index 000000000..904771486 --- /dev/null +++ b/src/modules/attitude_estimator_so3_comp/visualization_code/FreeIMU_yaw_pitch_roll/data/CourierNew36.vlw diff --git a/src/modules/attitude_estimator_so3_comp/visualization_code/README b/src/modules/attitude_estimator_so3_comp/visualization_code/README new file mode 100644 index 000000000..c02863343 --- /dev/null +++ b/src/modules/attitude_estimator_so3_comp/visualization_code/README @@ -0,0 +1,9 @@ +If you run the attitude estimator by following command, the software will write packets +over /dev/ttyS1 which is used for 3D visualization. + + nsh> attitude_estimator_so3_comp start -d /dev/ttyS1 -b 115200 + +This visualization code can be executed by Processing. + Download : http://www.processing.org/download/ + +The visualization code works with Processing version 1.5.1. |