Working file for communication with ROS
Dependencies: QEI2 PID VL53L1X_Filter
wheelchair.cpp@21:3489cffad196, 2019-04-19 (annotated)
- Committer:
- jvfausto
- Date:
- Fri Apr 19 23:04:01 2019 +0000
- Revision:
- 21:3489cffad196
- Parent:
- 20:f42db4ae16f0
- Child:
- 26:c842070aa0b8
a
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
jvfausto | 21:3489cffad196 | 1 | |
ryanlin97 | 0:fc0c4a184482 | 2 | #include "wheelchair.h" |
jvfausto | 21:3489cffad196 | 3 | |
jvfausto | 21:3489cffad196 | 4 | bool manual_drive = false; // Variable changes between joystick and auto drive |
jvfausto | 21:3489cffad196 | 5 | double encoder_distance; // Keeps distanse due to original position |
jvfausto | 21:3489cffad196 | 6 | |
jvfausto | 21:3489cffad196 | 7 | volatile double Setpoint, Output, Input, Input2; // Variables for PID |
jvfausto | 21:3489cffad196 | 8 | volatile double pid_yaw, Distance, Setpoint2, Output2, encoder_distance2; // Variables for PID |
jvfausto | 21:3489cffad196 | 9 | volatile double vIn, vOut, vDesired; // Variables for PID Velosity |
jvfausto | 21:3489cffad196 | 10 | volatile double vInS, vOutS, vDesiredS; // Variables for PID Slave Wheel |
jvfausto | 21:3489cffad196 | 11 | volatile double yIn, yOut, yDesired; // Variables for PID turn velosity |
ryanlin97 | 11:d14a1f7f1297 | 12 | |
jvfausto | 21:3489cffad196 | 13 | double dist_old, curr_pos; // Variables for odometry position |
jvfausto | 19:71a6621ee5c3 | 14 | |
jvfausto | 21:3489cffad196 | 15 | |
jvfausto | 21:3489cffad196 | 16 | PID myPID(&pid_yaw, &Output, &Setpoint, 5.5, .00, 0.0036, P_ON_E, DIRECT); // Angle PID object constructor |
jvfausto | 21:3489cffad196 | 17 | PID myPIDDistance(&Input, &Output, &Setpoint, 5.5, .00, 0.002, P_ON_E, DIRECT); // Distance PID object constructor |
jvfausto | 21:3489cffad196 | 18 | PID PIDVelosity(&vIn, &vOut, &vDesired, 5.5, .00, .002, P_ON_E, DIRECT); // Velosity PID Constructor |
jvfausto | 21:3489cffad196 | 19 | PID PIDSlaveV(&vInS, &vOutS, &vDesiredS, 5.5, .00, .002, P_ON_E, DIRECT); // Slave Velosity PID Constructor |
jvfausto | 21:3489cffad196 | 20 | PID PIDAngularV(&yIn, &yOut, &yDesired, 5.5, .00, .002, P_ON_E, DIRECT); // Angular Velosity PID Constructor |
jvfausto | 21:3489cffad196 | 21 | |
jvfausto | 19:71a6621ee5c3 | 22 | |
jvfausto | 21:3489cffad196 | 23 | /* Thread measures current angular position */ |
jvfausto | 21:3489cffad196 | 24 | void Wheelchair::compass_thread() |
jvfausto | 21:3489cffad196 | 25 | { |
ryanlin97 | 11:d14a1f7f1297 | 26 | curr_yaw = imu->yaw(); |
jvfausto | 21:3489cffad196 | 27 | z_angular = curr_yaw; |
jvfausto | 21:3489cffad196 | 28 | } |
jvfausto | 17:7f3b69300bb6 | 29 | |
jvfausto | 21:3489cffad196 | 30 | /* Thread measures velocity of wheels and distance traveled */ |
jvfausto | 21:3489cffad196 | 31 | void Wheelchair::velocity_thread() |
ryanlin97 | 1:c0beadca1617 | 32 | { |
jvfausto | 21:3489cffad196 | 33 | curr_vel = wheel->getVelocity(); |
jvfausto | 21:3489cffad196 | 34 | curr_velS = wheelS->getVelocity(); |
jvfausto | 21:3489cffad196 | 35 | curr_pos = wheel->getDistance(53.975); |
ryanlin97 | 1:c0beadca1617 | 36 | } |
ryanlin97 | 6:0cd57bdd8fbc | 37 | |
jvfausto | 21:3489cffad196 | 38 | void Wheelchair::assistSafe_thread() |
ryanlin97 | 1:c0beadca1617 | 39 | { |
jvfausto | 21:3489cffad196 | 40 | int ToFV[12]; |
jvfausto | 21:3489cffad196 | 41 | for(int i = 0; i < 9; i++) // reads from the ToF Sensors |
jvfausto | 21:3489cffad196 | 42 | { |
jvfausto | 21:3489cffad196 | 43 | ToFV[i] = (*(ToF+i))->readFromOneSensor(); |
jvfausto | 21:3489cffad196 | 44 | //out->printf("%d ", ToFV[i]); |
jvfausto | 21:3489cffad196 | 45 | } |
jvfausto | 21:3489cffad196 | 46 | out->printf("\r\n"); |
jvfausto | 21:3489cffad196 | 47 | int sensor1 = ToFV[2]; |
jvfausto | 21:3489cffad196 | 48 | int sensor4 = ToFV[5]; |
jvfausto | 21:3489cffad196 | 49 | out->printf("%d, %d\r\n", sensor1, sensor4); |
jvfausto | 21:3489cffad196 | 50 | if(((2 * maxDeceleration*sensor1 < curr_vel*curr_vel*1000*1000 || |
jvfausto | 21:3489cffad196 | 51 | 2 * maxDeceleration*sensor4 < curr_vel*curr_vel*1000*1000) && |
jvfausto | 21:3489cffad196 | 52 | (sensor1 < 1500 || sensor4 < 1500)) || |
jvfausto | 21:3489cffad196 | 53 | 550 > sensor1 || 550 > sensor4) |
jvfausto | 21:3489cffad196 | 54 | { |
jvfausto | 21:3489cffad196 | 55 | //out->printf("i am in danger\r\n"); |
jvfausto | 21:3489cffad196 | 56 | if(x->read() > def) |
jvfausto | 21:3489cffad196 | 57 | { |
jvfausto | 21:3489cffad196 | 58 | x->write(def); |
jvfausto | 21:3489cffad196 | 59 | forwardSafety = 1; |
jvfausto | 21:3489cffad196 | 60 | } |
jvfausto | 21:3489cffad196 | 61 | } |
jvfausto | 21:3489cffad196 | 62 | else |
jvfausto | 21:3489cffad196 | 63 | forwardSafety = 0; |
jvfausto | 21:3489cffad196 | 64 | |
jvfausto | 21:3489cffad196 | 65 | } |
ryanlin97 | 6:0cd57bdd8fbc | 66 | |
jvfausto | 21:3489cffad196 | 67 | /* Constructor for Wheelchair class */ |
jvfausto | 21:3489cffad196 | 68 | Wheelchair::Wheelchair(PinName xPin, PinName yPin, Serial* pc, Timer* time, QEI* qei, QEI* qeiS, |
jvfausto | 21:3489cffad196 | 69 | VL53L1X** ToFT) |
jvfausto | 21:3489cffad196 | 70 | { |
jvfausto | 21:3489cffad196 | 71 | x_position = 0; |
jvfausto | 21:3489cffad196 | 72 | y_position = 0; |
jvfausto | 21:3489cffad196 | 73 | forwardSafety = 0; |
jvfausto | 21:3489cffad196 | 74 | /* Initializes X and Y variables to Pins */ |
jvfausto | 21:3489cffad196 | 75 | x = new PwmOut(xPin); |
jvfausto | 21:3489cffad196 | 76 | y = new PwmOut(yPin); |
jvfausto | 21:3489cffad196 | 77 | /* Initializes IMU Library */ |
jvfausto | 21:3489cffad196 | 78 | imu = new chair_BNO055(pc, time); |
jvfausto | 21:3489cffad196 | 79 | Wheelchair::stop(); // Wheelchair is initially stationary |
jvfausto | 21:3489cffad196 | 80 | imu->setup(); // turns on the IMU |
jvfausto | 21:3489cffad196 | 81 | out = pc; // "out" is called for serial monitor |
jvfausto | 21:3489cffad196 | 82 | wheelS = qeiS; // "wheel" is called for encoder |
jvfausto | 21:3489cffad196 | 83 | wheel = qei; |
jvfausto | 21:3489cffad196 | 84 | ToF = ToFT; // passes pointer with addresses of ToF sensors |
jvfausto | 21:3489cffad196 | 85 | |
jvfausto | 21:3489cffad196 | 86 | for(int i = 0; i < 12; i++) // initializes the ToF Sensors |
jvfausto | 21:3489cffad196 | 87 | { |
jvfausto | 21:3489cffad196 | 88 | (*(ToF+i))->initReading(0x31+((0x02)*i), 50000); |
jvfausto | 21:3489cffad196 | 89 | } |
jvfausto | 21:3489cffad196 | 90 | |
jvfausto | 21:3489cffad196 | 91 | out->printf("wheelchair setup done \r\n"); // Make sure it initialized; prints in serial monitor |
jvfausto | 21:3489cffad196 | 92 | ti = time; |
jvfausto | 21:3489cffad196 | 93 | |
jvfausto | 21:3489cffad196 | 94 | |
jvfausto | 21:3489cffad196 | 95 | myPID.SetMode(AUTOMATIC); // PID mode: Automatic |
jvfausto | 21:3489cffad196 | 96 | } |
jvfausto | 21:3489cffad196 | 97 | |
jvfausto | 21:3489cffad196 | 98 | /* Move wheelchair with joystick on manual mode */ |
jvfausto | 21:3489cffad196 | 99 | void Wheelchair::move(float x_coor, float y_coor) |
jvfausto | 21:3489cffad196 | 100 | { |
jvfausto | 21:3489cffad196 | 101 | /* Scales one joystick measurement to the chair's joystick measurement */ |
ryanlin97 | 4:29a27953fe70 | 102 | float scaled_x = ((x_coor * 1.6f) + 1.7f)/3.3f; |
ryanlin97 | 4:29a27953fe70 | 103 | float scaled_y = (3.3f - (y_coor * 1.6f))/3.3f; |
jvfausto | 21:3489cffad196 | 104 | |
jvfausto | 21:3489cffad196 | 105 | /* Sends the scaled joystic values to the chair */ |
jvfausto | 21:3489cffad196 | 106 | x->write(scaled_x); |
ryanlin97 | 4:29a27953fe70 | 107 | y->write(scaled_y); |
ryanlin97 | 5:e0ccaab3959a | 108 | } |
jvfausto | 21:3489cffad196 | 109 | |
jvfausto | 21:3489cffad196 | 110 | /* Automatic mode: move forward and update x,y coordinate sent to chair */ |
jvfausto | 21:3489cffad196 | 111 | void Wheelchair::forward() |
ryanlin97 | 1:c0beadca1617 | 112 | { |
jvfausto | 21:3489cffad196 | 113 | if(forwardSafety == 0) |
jvfausto | 21:3489cffad196 | 114 | { |
ryanlin97 | 0:fc0c4a184482 | 115 | x->write(high); |
ryanlin97 | 3:a5e71bfdb492 | 116 | y->write(def+offset); |
jvfausto | 21:3489cffad196 | 117 | } |
ryanlin97 | 0:fc0c4a184482 | 118 | } |
jvfausto | 21:3489cffad196 | 119 | |
jvfausto | 21:3489cffad196 | 120 | /* Automatic mode: move in reverse and update x,y coordinate sent to chair */ |
jvfausto | 21:3489cffad196 | 121 | void Wheelchair::backward() |
ryanlin97 | 1:c0beadca1617 | 122 | { |
ryanlin97 | 0:fc0c4a184482 | 123 | x->write(low); |
ryanlin97 | 0:fc0c4a184482 | 124 | y->write(def); |
ryanlin97 | 0:fc0c4a184482 | 125 | } |
jvfausto | 21:3489cffad196 | 126 | |
jvfausto | 21:3489cffad196 | 127 | /* Automatic mode: move right and update x,y coordinate sent to chair */ |
jvfausto | 21:3489cffad196 | 128 | void Wheelchair::right() |
ryanlin97 | 1:c0beadca1617 | 129 | { |
ryanlin97 | 0:fc0c4a184482 | 130 | x->write(def); |
ryanlin97 | 11:d14a1f7f1297 | 131 | y->write(low); |
ryanlin97 | 0:fc0c4a184482 | 132 | } |
ryanlin97 | 0:fc0c4a184482 | 133 | |
jvfausto | 21:3489cffad196 | 134 | /* Automatic mode: move left and update x,y coordinate sent to chair */ |
jvfausto | 21:3489cffad196 | 135 | void Wheelchair::left() |
ryanlin97 | 1:c0beadca1617 | 136 | { |
ryanlin97 | 0:fc0c4a184482 | 137 | x->write(def); |
ryanlin97 | 11:d14a1f7f1297 | 138 | y->write(high); |
ryanlin97 | 0:fc0c4a184482 | 139 | } |
jvfausto | 21:3489cffad196 | 140 | |
jvfausto | 21:3489cffad196 | 141 | /* Stop the wheelchair */ |
jvfausto | 21:3489cffad196 | 142 | void Wheelchair::stop() |
ryanlin97 | 1:c0beadca1617 | 143 | { |
ryanlin97 | 0:fc0c4a184482 | 144 | x->write(def); |
ryanlin97 | 0:fc0c4a184482 | 145 | y->write(def); |
ryanlin97 | 6:0cd57bdd8fbc | 146 | } |
jvfausto | 21:3489cffad196 | 147 | |
jvfausto | 21:3489cffad196 | 148 | /* Counter-clockwise is - |
jvfausto | 21:3489cffad196 | 149 | * Clockwise is + |
jvfausto | 21:3489cffad196 | 150 | * Range of deg: 0 to 360 |
jvfausto | 21:3489cffad196 | 151 | * This constructor takes in an angle from user and adjusts for turning right |
jvfausto | 21:3489cffad196 | 152 | */ |
jvfausto | 21:3489cffad196 | 153 | void Wheelchair::pid_right(int deg) |
ryanlin97 | 12:921488918749 | 154 | { |
jvfausto | 21:3489cffad196 | 155 | bool overturn = false; //Boolean if angle over 360˚ |
ryanlin97 | 12:921488918749 | 156 | |
jvfausto | 21:3489cffad196 | 157 | out->printf("pid right\r\r\n"); |
jvfausto | 21:3489cffad196 | 158 | x->write(def); // Update x sent to chair to be stationary |
jvfausto | 21:3489cffad196 | 159 | Setpoint = curr_yaw + deg; // Relative angle we want to turn |
jvfausto | 21:3489cffad196 | 160 | pid_yaw = curr_yaw; // Sets pid_yaw to angle input from user |
jvfausto | 21:3489cffad196 | 161 | |
jvfausto | 21:3489cffad196 | 162 | /* Turns on overturn boolean if setpoint over 360˚ */ |
jvfausto | 21:3489cffad196 | 163 | if(Setpoint > 360) |
jvfausto | 21:3489cffad196 | 164 | { |
ryanlin97 | 12:921488918749 | 165 | overturn = true; |
ryanlin97 | 12:921488918749 | 166 | } |
jvfausto | 21:3489cffad196 | 167 | |
jvfausto | 21:3489cffad196 | 168 | myPID.SetTunings(5.5,0, 0.0035); // Sets the constants for P and D |
jvfausto | 21:3489cffad196 | 169 | myPID.SetOutputLimits(0, def-low-.15); // Limit is set to the differnce between def and low |
jvfausto | 21:3489cffad196 | 170 | myPID.SetControllerDirection(DIRECT); // PID mode: Direct |
jvfausto | 21:3489cffad196 | 171 | |
jvfausto | 21:3489cffad196 | 172 | /* PID stops when approaching a litte less than desired angle */ |
jvfausto | 21:3489cffad196 | 173 | while(pid_yaw < Setpoint - 3) |
jvfausto | 21:3489cffad196 | 174 | { |
jvfausto | 21:3489cffad196 | 175 | /* PID is set to correct angle range if angle greater than 360˚*/ |
jvfausto | 17:7f3b69300bb6 | 176 | if(overturn && curr_yaw < Setpoint-deg-1) |
jvfausto | 17:7f3b69300bb6 | 177 | { |
jvfausto | 21:3489cffad196 | 178 | pid_yaw = curr_yaw + 360; |
jvfausto | 21:3489cffad196 | 179 | } |
jvfausto | 21:3489cffad196 | 180 | else |
jvfausto | 21:3489cffad196 | 181 | { |
jvfausto | 17:7f3b69300bb6 | 182 | pid_yaw = curr_yaw; |
ryanlin97 | 12:921488918749 | 183 | } |
jvfausto | 21:3489cffad196 | 184 | |
jvfausto | 21:3489cffad196 | 185 | myPID.Compute(); // Does PID calculations |
jvfausto | 21:3489cffad196 | 186 | double tempor = -Output+def; // Temporary value with the voltage output |
jvfausto | 21:3489cffad196 | 187 | y->write(tempor); // Update y sent to chair |
jvfausto | 21:3489cffad196 | 188 | |
jvfausto | 21:3489cffad196 | 189 | /* Prints to serial monitor the current angle and setpoint */ |
jvfausto | 21:3489cffad196 | 190 | out->printf("curr_yaw %f\r\r\n", curr_yaw); |
jvfausto | 21:3489cffad196 | 191 | out->printf("Setpoint = %f \r\n", Setpoint); |
jvfausto | 21:3489cffad196 | 192 | |
jvfausto | 21:3489cffad196 | 193 | wait(.05); // Small delay (milliseconds) |
ryanlin97 | 12:921488918749 | 194 | } |
jvfausto | 21:3489cffad196 | 195 | |
jvfausto | 21:3489cffad196 | 196 | /* Saftey stop for wheelchair */ |
jvfausto | 21:3489cffad196 | 197 | Wheelchair::stop(); |
jvfausto | 21:3489cffad196 | 198 | out->printf("done \r\n"); |
jvfausto | 21:3489cffad196 | 199 | } |
jvfausto | 21:3489cffad196 | 200 | |
jvfausto | 21:3489cffad196 | 201 | /* Counter-clockwise is - |
jvfausto | 21:3489cffad196 | 202 | * Clockwise is + |
jvfausto | 21:3489cffad196 | 203 | * Range of deg: 0 to 360 |
jvfausto | 21:3489cffad196 | 204 | * This constructor takes in an angle from user and adjusts for turning left |
jvfausto | 21:3489cffad196 | 205 | */ |
jvfausto | 21:3489cffad196 | 206 | void Wheelchair::pid_left(int deg) |
ryanlin97 | 12:921488918749 | 207 | { |
jvfausto | 21:3489cffad196 | 208 | bool overturn = false; //Boolean if angle under 0˚ |
ryanlin97 | 12:921488918749 | 209 | |
jvfausto | 21:3489cffad196 | 210 | out->printf("pid Left\r\r\n"); |
jvfausto | 21:3489cffad196 | 211 | x->write(def); // Update x sent to chair to be stationary |
jvfausto | 21:3489cffad196 | 212 | Setpoint = curr_yaw - deg; // Relative angle we want to turn |
jvfausto | 21:3489cffad196 | 213 | pid_yaw = curr_yaw; // Sets pid_yaw to angle input from user |
jvfausto | 21:3489cffad196 | 214 | |
jvfausto | 21:3489cffad196 | 215 | /* Turns on overturn boolean if setpoint less than 0˚ */ |
jvfausto | 21:3489cffad196 | 216 | if(Setpoint < 0) |
jvfausto | 21:3489cffad196 | 217 | { |
ryanlin97 | 12:921488918749 | 218 | overturn = true; |
ryanlin97 | 12:921488918749 | 219 | } |
jvfausto | 21:3489cffad196 | 220 | |
jvfausto | 21:3489cffad196 | 221 | myPID.SetTunings(5,0, 0.004); // Sets the constants for P and D |
jvfausto | 21:3489cffad196 | 222 | myPID.SetOutputLimits(0,high-def-.12); //Limit is set to the differnce between def and low |
jvfausto | 21:3489cffad196 | 223 | myPID.SetControllerDirection(REVERSE); // PID mode: Reverse |
jvfausto | 21:3489cffad196 | 224 | |
jvfausto | 21:3489cffad196 | 225 | /* PID stops when approaching a litte more than desired angle */ |
jvfausto | 21:3489cffad196 | 226 | while(pid_yaw > Setpoint+3) |
jvfausto | 21:3489cffad196 | 227 | { |
jvfausto | 21:3489cffad196 | 228 | /* PID is set to correct angle range if angle less than 0˚ */ |
jvfausto | 21:3489cffad196 | 229 | if(overturn && curr_yaw > Setpoint+deg+1) |
jvfausto | 17:7f3b69300bb6 | 230 | { |
jvfausto | 17:7f3b69300bb6 | 231 | pid_yaw = curr_yaw - 360; |
jvfausto | 21:3489cffad196 | 232 | } |
jvfausto | 21:3489cffad196 | 233 | else |
jvfausto | 21:3489cffad196 | 234 | { |
jvfausto | 21:3489cffad196 | 235 | pid_yaw = curr_yaw; |
jvfausto | 21:3489cffad196 | 236 | } |
jvfausto | 21:3489cffad196 | 237 | |
jvfausto | 21:3489cffad196 | 238 | myPID.Compute(); // Does PID calculations |
jvfausto | 21:3489cffad196 | 239 | double tempor = Output+def; // Temporary value with the voltage output |
jvfausto | 21:3489cffad196 | 240 | y->write(tempor); // Update y sent to chair |
jvfausto | 21:3489cffad196 | 241 | |
jvfausto | 21:3489cffad196 | 242 | /* Prints to serial monitor the current angle and setpoint */ |
jvfausto | 17:7f3b69300bb6 | 243 | out->printf("curr_yaw %f\r\n", curr_yaw); |
jvfausto | 21:3489cffad196 | 244 | out->printf("Setpoint = %f \r\n", Setpoint); |
jvfausto | 21:3489cffad196 | 245 | |
jvfausto | 21:3489cffad196 | 246 | wait(.05); // Small delay (milliseconds) |
ryanlin97 | 12:921488918749 | 247 | } |
jvfausto | 21:3489cffad196 | 248 | |
jvfausto | 21:3489cffad196 | 249 | /* Saftey stop for wheelchair */ |
jvfausto | 21:3489cffad196 | 250 | Wheelchair::stop(); |
jvfausto | 21:3489cffad196 | 251 | out->printf("done \r\n"); |
ryanlin97 | 12:921488918749 | 252 | |
jvfausto | 21:3489cffad196 | 253 | } |
jvfausto | 21:3489cffad196 | 254 | |
jvfausto | 21:3489cffad196 | 255 | /* This constructor determines whether to turn left or right */ |
jvfausto | 21:3489cffad196 | 256 | void Wheelchair::pid_turn(int deg) |
jvfausto | 21:3489cffad196 | 257 | { |
jvfausto | 21:3489cffad196 | 258 | |
jvfausto | 21:3489cffad196 | 259 | /* Sets angle to coterminal angle for left turn if deg > 180 |
jvfausto | 21:3489cffad196 | 260 | * Sets angle to coterminal angle for right turn if deg < -180 |
jvfausto | 21:3489cffad196 | 261 | */ |
jvfausto | 21:3489cffad196 | 262 | if(deg > 180) |
jvfausto | 21:3489cffad196 | 263 | { |
ryanlin97 | 12:921488918749 | 264 | deg -= 360; |
ryanlin97 | 12:921488918749 | 265 | } |
jvfausto | 21:3489cffad196 | 266 | else if(deg < -180) |
jvfausto | 21:3489cffad196 | 267 | { |
jvfausto | 21:3489cffad196 | 268 | deg +=360; |
ryanlin97 | 12:921488918749 | 269 | } |
ryanlin97 | 12:921488918749 | 270 | |
jvfausto | 21:3489cffad196 | 271 | /* Makes sure angle inputted to function is positive */ |
ryanlin97 | 12:921488918749 | 272 | int turnAmt = abs(deg); |
jvfausto | 21:3489cffad196 | 273 | |
jvfausto | 21:3489cffad196 | 274 | /* Calls PID_right if deg > 0, else calls PID_left if deg < 0 */ |
jvfausto | 21:3489cffad196 | 275 | if(deg >= 0) |
jvfausto | 21:3489cffad196 | 276 | { |
jvfausto | 21:3489cffad196 | 277 | Wheelchair::pid_right(turnAmt); |
jvfausto | 21:3489cffad196 | 278 | } |
jvfausto | 21:3489cffad196 | 279 | else |
jvfausto | 21:3489cffad196 | 280 | { |
jvfausto | 21:3489cffad196 | 281 | Wheelchair::pid_left(turnAmt); |
jvfausto | 21:3489cffad196 | 282 | } |
ryanlin97 | 12:921488918749 | 283 | |
jvfausto | 21:3489cffad196 | 284 | } |
jvfausto | 21:3489cffad196 | 285 | |
jvfausto | 21:3489cffad196 | 286 | /* This constructor takes in distance to travel and adjust to move forward */ |
jvfausto | 19:71a6621ee5c3 | 287 | void Wheelchair::pid_forward(double mm) |
jvfausto | 17:7f3b69300bb6 | 288 | { |
jvfausto | 21:3489cffad196 | 289 | mm -= 20; // Makes sure distance does not overshoot |
jvfausto | 21:3489cffad196 | 290 | Input = 0; // Initializes input to zero: Test latter w/o |
jvfausto | 21:3489cffad196 | 291 | wheel->reset(); // Resets encoders so that they start at 0 |
jvfausto | 21:3489cffad196 | 292 | |
jvfausto | 17:7f3b69300bb6 | 293 | out->printf("pid foward\r\n"); |
jvfausto | 21:3489cffad196 | 294 | |
jvfausto | 21:3489cffad196 | 295 | double tempor; // Initializes Temporary variable for x input |
jvfausto | 21:3489cffad196 | 296 | Setpoint = mm; // Initializes the setpoint to desired value |
jvfausto | 21:3489cffad196 | 297 | |
jvfausto | 21:3489cffad196 | 298 | myPIDDistance.SetTunings(5.5,0, 0.0015); // Sets constants for P and D |
jvfausto | 21:3489cffad196 | 299 | myPIDDistance.SetOutputLimits(0,high-def-.15); // Limit set to difference between high and def |
jvfausto | 21:3489cffad196 | 300 | myPIDDistance.SetControllerDirection(DIRECT); // PID mode: Direct |
jvfausto | 21:3489cffad196 | 301 | |
jvfausto | 21:3489cffad196 | 302 | y->write(def+offset); // Update y to make chair stationary |
jvfausto | 21:3489cffad196 | 303 | |
jvfausto | 21:3489cffad196 | 304 | /* Chair stops moving when Setpoint is reached */ |
jvfausto | 21:3489cffad196 | 305 | while(Input < Setpoint){ |
jvfausto | 21:3489cffad196 | 306 | |
jvfausto | 21:3489cffad196 | 307 | if(out->readable()) // Emergency Break |
jvfausto | 21:3489cffad196 | 308 | { |
jvfausto | 21:3489cffad196 | 309 | break; |
jvfausto | 21:3489cffad196 | 310 | } |
jvfausto | 17:7f3b69300bb6 | 311 | |
jvfausto | 21:3489cffad196 | 312 | Input = wheel->getDistance(53.975); // Gets distance from Encoder into PID |
jvfausto | 21:3489cffad196 | 313 | wait(.05); // Slight Delay: *****Test without |
jvfausto | 21:3489cffad196 | 314 | myPIDDistance.Compute(); // Compute distance traveled by chair |
jvfausto | 21:3489cffad196 | 315 | |
jvfausto | 21:3489cffad196 | 316 | tempor = Output + def; // Temporary output variable |
jvfausto | 21:3489cffad196 | 317 | x->write(tempor); // Update x sent to chair |
jvfausto | 17:7f3b69300bb6 | 318 | |
jvfausto | 21:3489cffad196 | 319 | /* Prints to serial monitor the distance traveled by chair */ |
jvfausto | 19:71a6621ee5c3 | 320 | out->printf("distance %f\r\n", Input); |
jvfausto | 17:7f3b69300bb6 | 321 | } |
ryanlin97 | 12:921488918749 | 322 | |
jvfausto | 17:7f3b69300bb6 | 323 | } |
jvfausto | 21:3489cffad196 | 324 | |
jvfausto | 21:3489cffad196 | 325 | /* This constructor returns the relative angular position of chair */ |
jvfausto | 21:3489cffad196 | 326 | double Wheelchair::getTwistZ() |
jvfausto | 17:7f3b69300bb6 | 327 | { |
jvfausto | 21:3489cffad196 | 328 | return imu->gyro_z(); |
jvfausto | 21:3489cffad196 | 329 | } |
jvfausto | 18:663b6d693252 | 330 | |
jvfausto | 21:3489cffad196 | 331 | /* This constructor computes the relative angle for Twist message in ROS */ |
jvfausto | 21:3489cffad196 | 332 | void Wheelchair::pid_twistA() |
jvfausto | 21:3489cffad196 | 333 | { |
jvfausto | 21:3489cffad196 | 334 | /* Initialize variables for angle and update x,y sent to chair */ |
jvfausto | 21:3489cffad196 | 335 | char c; |
jvfausto | 21:3489cffad196 | 336 | double temporA = def; |
jvfausto | 21:3489cffad196 | 337 | y->write(def); |
jvfausto | 21:3489cffad196 | 338 | x->write(def); |
jvfausto | 21:3489cffad196 | 339 | |
jvfausto | 21:3489cffad196 | 340 | PIDAngularV.SetTunings(.00015,0, 0.00); // Sets the constants for P and D |
jvfausto | 21:3489cffad196 | 341 | PIDAngularV.SetOutputLimits(-.1, .1); // Limit set to be in range specified |
jvfausto | 21:3489cffad196 | 342 | PIDAngularV.SetControllerDirection(DIRECT); // PID mode: Direct |
jvfausto | 21:3489cffad196 | 343 | |
jvfausto | 21:3489cffad196 | 344 | /* Computes angular position of wheelchair while turning */ |
jvfausto | 21:3489cffad196 | 345 | while(1) |
jvfausto | 21:3489cffad196 | 346 | { |
jvfausto | 21:3489cffad196 | 347 | yDesired = angularV; |
jvfausto | 21:3489cffad196 | 348 | |
jvfausto | 21:3489cffad196 | 349 | /* Update and set all variable so that the chair is stationary |
jvfausto | 21:3489cffad196 | 350 | * if the desired angle is zero |
jvfausto | 21:3489cffad196 | 351 | */ |
jvfausto | 21:3489cffad196 | 352 | if(yDesired == 0) |
jvfausto | 18:663b6d693252 | 353 | { |
jvfausto | 21:3489cffad196 | 354 | x->write(def); |
jvfausto | 21:3489cffad196 | 355 | y->write(def); |
jvfausto | 21:3489cffad196 | 356 | yDesired = 0; |
ryanlin97 | 8:381a4ec3fef8 | 357 | return; |
ryanlin97 | 7:5e38d43fbce3 | 358 | } |
jvfausto | 21:3489cffad196 | 359 | |
jvfausto | 21:3489cffad196 | 360 | /* Continuously updates with current angle measured by IMU */ |
jvfausto | 21:3489cffad196 | 361 | yIn = imu->gyro_z(); |
jvfausto | 21:3489cffad196 | 362 | PIDAngularV.Compute(); |
jvfausto | 21:3489cffad196 | 363 | temporA += yOut; // Temporary value with the voltage output |
jvfausto | 21:3489cffad196 | 364 | y->write(temporA); // Update y sent to chair |
jvfausto | 21:3489cffad196 | 365 | |
jvfausto | 21:3489cffad196 | 366 | //out->printf("temporA: %f, yDesired %f, angle: %f\r\n", temporA, yDesired, imu->gyro_z()); |
jvfausto | 21:3489cffad196 | 367 | wait(.05); // Small delay (milliseconds) |
ryanlin97 | 6:0cd57bdd8fbc | 368 | } |
jvfausto | 21:3489cffad196 | 369 | |
jvfausto | 21:3489cffad196 | 370 | } |
ryanlin97 | 6:0cd57bdd8fbc | 371 | |
jvfausto | 21:3489cffad196 | 372 | /* This constructor computes the relative velocity for Twist message in ROS */ |
jvfausto | 21:3489cffad196 | 373 | void Wheelchair::pid_twistV() |
ryanlin97 | 6:0cd57bdd8fbc | 374 | { |
jvfausto | 21:3489cffad196 | 375 | /* Initializes variables as default */ |
jvfausto | 21:3489cffad196 | 376 | double temporV = def; |
jvfausto | 21:3489cffad196 | 377 | double temporS = def; |
jvfausto | 21:3489cffad196 | 378 | vDesiredS = 0; |
jvfausto | 21:3489cffad196 | 379 | x->write(def); |
jvfausto | 21:3489cffad196 | 380 | y->write(def); |
jvfausto | 21:3489cffad196 | 381 | wheel->reset(); // Resets the encoders |
jvfausto | 21:3489cffad196 | 382 | /* Sets the constants for P and D */ |
jvfausto | 21:3489cffad196 | 383 | PIDVelosity.SetTunings(.0005,0, 0.00); |
jvfausto | 21:3489cffad196 | 384 | PIDSlaveV.SetTunings(.01,0.000001, 0.000001); |
jvfausto | 21:3489cffad196 | 385 | |
jvfausto | 21:3489cffad196 | 386 | /* Limits to the range specified */ |
jvfausto | 21:3489cffad196 | 387 | PIDVelosity.SetOutputLimits(-.005, .005); |
jvfausto | 21:3489cffad196 | 388 | PIDSlaveV.SetOutputLimits(-.002, .002); |
jvfausto | 21:3489cffad196 | 389 | |
jvfausto | 21:3489cffad196 | 390 | /* PID mode: Direct */ |
jvfausto | 21:3489cffad196 | 391 | PIDVelosity.SetControllerDirection(DIRECT); |
jvfausto | 21:3489cffad196 | 392 | PIDSlaveV.SetControllerDirection(DIRECT); |
jvfausto | 21:3489cffad196 | 393 | |
jvfausto | 21:3489cffad196 | 394 | while(1) |
jvfausto | 21:3489cffad196 | 395 | { |
jvfausto | 21:3489cffad196 | 396 | linearV = .7; |
jvfausto | 21:3489cffad196 | 397 | test1 = linearV*100; |
jvfausto | 21:3489cffad196 | 398 | vel = curr_vel; |
jvfausto | 21:3489cffad196 | 399 | vDesired = linearV*100; |
jvfausto | 21:3489cffad196 | 400 | if(out->readable()) |
jvfausto | 21:3489cffad196 | 401 | return; |
jvfausto | 21:3489cffad196 | 402 | /* Update and set all variable so that the chair is stationary |
jvfausto | 21:3489cffad196 | 403 | * if the velocity is zero |
jvfausto | 21:3489cffad196 | 404 | */ |
jvfausto | 21:3489cffad196 | 405 | if(linearV == 0) |
jvfausto | 21:3489cffad196 | 406 | { |
jvfausto | 21:3489cffad196 | 407 | x->write(def); |
jvfausto | 21:3489cffad196 | 408 | y->write(def); |
ryanlin97 | 8:381a4ec3fef8 | 409 | |
jvfausto | 21:3489cffad196 | 410 | vel = 0; |
jvfausto | 21:3489cffad196 | 411 | vDesired = 0; |
jvfausto | 21:3489cffad196 | 412 | dist_old = 0; |
ryanlin97 | 8:381a4ec3fef8 | 413 | return; |
ryanlin97 | 8:381a4ec3fef8 | 414 | } |
jvfausto | 21:3489cffad196 | 415 | |
jvfausto | 21:3489cffad196 | 416 | if(vDesired >= 0) |
jvfausto | 21:3489cffad196 | 417 | { |
jvfausto | 21:3489cffad196 | 418 | PIDVelosity.SetTunings(.000004,0, 0.00); // Sets the constants for P and D |
jvfausto | 21:3489cffad196 | 419 | PIDVelosity.SetOutputLimits(-.002, .002); // Limits to the range specified |
jvfausto | 21:3489cffad196 | 420 | } |
jvfausto | 21:3489cffad196 | 421 | else |
jvfausto | 21:3489cffad196 | 422 | { |
jvfausto | 21:3489cffad196 | 423 | PIDVelosity.SetTunings(.000015,0, 0.00); // Sets the constants for P and D |
jvfausto | 21:3489cffad196 | 424 | PIDVelosity.SetOutputLimits(-.0005, .0005); // Limits to range specified |
jvfausto | 21:3489cffad196 | 425 | } |
jvfausto | 21:3489cffad196 | 426 | |
jvfausto | 21:3489cffad196 | 427 | /* Sets maximum value of variable to 1 */ |
jvfausto | 21:3489cffad196 | 428 | if(temporV >= 1.5) |
jvfausto | 21:3489cffad196 | 429 | { |
jvfausto | 21:3489cffad196 | 430 | temporV = 1.5; |
ryanlin97 | 8:381a4ec3fef8 | 431 | } |
jvfausto | 21:3489cffad196 | 432 | /* Scales and makes some adjustments to velocity */ |
jvfausto | 21:3489cffad196 | 433 | vIn = curr_vel*100; |
jvfausto | 21:3489cffad196 | 434 | vInS = curr_vel-curr_velS; |
jvfausto | 21:3489cffad196 | 435 | PIDVelosity.Compute(); |
jvfausto | 21:3489cffad196 | 436 | PIDSlaveV.Compute(); |
jvfausto | 21:3489cffad196 | 437 | if(forwardSafety == 0) |
jvfausto | 21:3489cffad196 | 438 | { |
jvfausto | 21:3489cffad196 | 439 | temporV += vOut; |
jvfausto | 21:3489cffad196 | 440 | temporS += vOutS; |
jvfausto | 21:3489cffad196 | 441 | |
jvfausto | 21:3489cffad196 | 442 | /* Updates x,y sent to Wheelchair and for Odometry message in ROS */ |
jvfausto | 21:3489cffad196 | 443 | x->write(temporV); |
jvfausto | 21:3489cffad196 | 444 | test2 = temporV; |
jvfausto | 21:3489cffad196 | 445 | y->write(temporS); |
jvfausto | 21:3489cffad196 | 446 | } |
jvfausto | 21:3489cffad196 | 447 | else |
jvfausto | 21:3489cffad196 | 448 | { |
jvfausto | 21:3489cffad196 | 449 | x->write(def); |
jvfausto | 21:3489cffad196 | 450 | y->write(def); |
jvfausto | 21:3489cffad196 | 451 | } |
jvfausto | 21:3489cffad196 | 452 | //out->printf("Velosity: %f, Velosity2: %f, temporV %f, temporS %f\r\n", curr_vel, curr_velS, temporV, temporS); |
jvfausto | 21:3489cffad196 | 453 | Wheelchair::odomMsg(); |
jvfausto | 21:3489cffad196 | 454 | wait(.01); // Small delay (milliseconds) |
ryanlin97 | 6:0cd57bdd8fbc | 455 | } |
ryanlin97 | 11:d14a1f7f1297 | 456 | } |
ryanlin97 | 11:d14a1f7f1297 | 457 | |
jvfausto | 21:3489cffad196 | 458 | /* This constructor calculates the relative position of the chair everytime the encoders reset |
jvfausto | 21:3489cffad196 | 459 | * by setting its old position as the origin to calculate the new position |
jvfausto | 21:3489cffad196 | 460 | */ |
jvfausto | 21:3489cffad196 | 461 | void Wheelchair::odomMsg() |
ryanlin97 | 11:d14a1f7f1297 | 462 | { |
jvfausto | 21:3489cffad196 | 463 | double dist_new = curr_pos; |
jvfausto | 21:3489cffad196 | 464 | double dist = dist_new-dist_old; |
jvfausto | 21:3489cffad196 | 465 | double temp_x = dist*sin(z_angular*3.14159/180); |
jvfausto | 21:3489cffad196 | 466 | double temp_y = dist*cos(z_angular*3.14159/180); |
jvfausto | 21:3489cffad196 | 467 | |
jvfausto | 21:3489cffad196 | 468 | x_position += temp_x; |
jvfausto | 21:3489cffad196 | 469 | y_position += temp_y; |
ryanlin97 | 11:d14a1f7f1297 | 470 | |
jvfausto | 21:3489cffad196 | 471 | dist_old = dist_new; |
jvfausto | 21:3489cffad196 | 472 | } |
jvfausto | 21:3489cffad196 | 473 | |
jvfausto | 21:3489cffad196 | 474 | /* This constructor prints the Odometry message to the serial monitor */ |
jvfausto | 21:3489cffad196 | 475 | void Wheelchair::showOdom() |
jvfausto | 21:3489cffad196 | 476 | { |
jvfausto | 21:3489cffad196 | 477 | out->printf("x %f, y %f, angle %f", x_position, y_position, z_angular); |
jvfausto | 21:3489cffad196 | 478 | } |
jvfausto | 21:3489cffad196 | 479 | |
jvfausto | 21:3489cffad196 | 480 | /* This constructor returns the approximate distance based on the wheel diameter */ |
jvfausto | 21:3489cffad196 | 481 | float Wheelchair::getDistance() |
jvfausto | 21:3489cffad196 | 482 | { |
jvfausto | 21:3489cffad196 | 483 | return wheel->getDistance(Diameter); |
ryanlin97 | 6:0cd57bdd8fbc | 484 | } |
ryanlin97 | 8:381a4ec3fef8 | 485 | |
jvfausto | 21:3489cffad196 | 486 | /* This constructor resets the wheel encoder's */ |
jvfausto | 21:3489cffad196 | 487 | void Wheelchair::resetDistance() |
jvfausto | 21:3489cffad196 | 488 | { |
ryanlin97 | 12:921488918749 | 489 | wheel->reset(); |
jvfausto | 21:3489cffad196 | 490 | } |
jvfausto | 21:3489cffad196 | 491 | |
jvfausto | 21:3489cffad196 | 492 | |
jvfausto | 21:3489cffad196 | 493 | /*Predetermined paths For Demmo*/ |
jvfausto | 21:3489cffad196 | 494 | void Wheelchair::desk() |
jvfausto | 21:3489cffad196 | 495 | { |
jvfausto | 19:71a6621ee5c3 | 496 | Wheelchair::pid_forward(5461); |
jvfausto | 19:71a6621ee5c3 | 497 | Wheelchair::pid_right(87); |
jvfausto | 19:71a6621ee5c3 | 498 | Wheelchair::pid_forward(3658); |
jvfausto | 19:71a6621ee5c3 | 499 | Wheelchair::pid_right(87); |
jvfausto | 19:71a6621ee5c3 | 500 | Wheelchair::pid_forward(3658); |
jvfausto | 21:3489cffad196 | 501 | } |
jvfausto | 21:3489cffad196 | 502 | |
jvfausto | 21:3489cffad196 | 503 | void Wheelchair::kitchen() |
jvfausto | 21:3489cffad196 | 504 | { |
jvfausto | 19:71a6621ee5c3 | 505 | Wheelchair::pid_forward(5461); |
jvfausto | 20:f42db4ae16f0 | 506 | Wheelchair::pid_right(87); |
jvfausto | 19:71a6621ee5c3 | 507 | Wheelchair::pid_forward(3658); |
jvfausto | 19:71a6621ee5c3 | 508 | Wheelchair::pid_left(90); |
jvfausto | 19:71a6621ee5c3 | 509 | Wheelchair::pid_forward(305); |
jvfausto | 21:3489cffad196 | 510 | } |
jvfausto | 21:3489cffad196 | 511 | |
jvfausto | 21:3489cffad196 | 512 | void Wheelchair::desk_to_kitchen() |
jvfausto | 21:3489cffad196 | 513 | { |
jvfausto | 19:71a6621ee5c3 | 514 | Wheelchair::pid_right(180); |
jvfausto | 19:71a6621ee5c3 | 515 | Wheelchair::pid_forward(3700); |
jvfausto | 21:3489cffad196 | 516 | } |