Updated with Statistics Library
Dependencies: QEI2 chair_BNO055 PID Watchdog VL53L1X_Filter ros_lib_kinetic
wheelchair.cpp@26:662693bd7f31, 2019-06-27 (annotated)
- Committer:
- jvfausto
- Date:
- Thu Jun 27 16:32:12 2019 +0000
- Revision:
- 26:662693bd7f31
- Parent:
- 21:3489cffad196
- Child:
- 27:da718b990837
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 | 26:662693bd7f31 | 41 | for(int i = 0; i < 6; 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 | 26:662693bd7f31 | 46 | //out->printf("\r\n"); |
jvfausto | 26:662693bd7f31 | 47 | int sensor1 = ToFV[1]; |
jvfausto | 21:3489cffad196 | 48 | int sensor4 = ToFV[5]; |
jvfausto | 26:662693bd7f31 | 49 | //out->printf("%d, %d\r\n", sensor1, sensor4); |
jvfausto | 26:662693bd7f31 | 50 | /*if(curr_vel < 1 &&((2 * maxDecelerationSlow*sensor1 < curr_vel*curr_vel*1000*1000 || |
jvfausto | 26:662693bd7f31 | 51 | 2 * maxDecelerationSlow*sensor4 < curr_vel*curr_vel*1000*1000) && |
jvfausto | 26:662693bd7f31 | 52 | (sensor1 < 1500 || sensor4 < 1500)) || |
jvfausto | 26:662693bd7f31 | 53 | 550 > sensor1 || 550 > sensor4) |
jvfausto | 26:662693bd7f31 | 54 | { |
jvfausto | 26:662693bd7f31 | 55 | //out->printf("i am in danger\r\n"); |
jvfausto | 26:662693bd7f31 | 56 | if(x->read() > def) |
jvfausto | 26:662693bd7f31 | 57 | { |
jvfausto | 26:662693bd7f31 | 58 | x->write(def); |
jvfausto | 26:662693bd7f31 | 59 | forwardSafety = 1; |
jvfausto | 26:662693bd7f31 | 60 | } |
jvfausto | 26:662693bd7f31 | 61 | } |
jvfausto | 26:662693bd7f31 | 62 | else if(curr_vel > 1 &&((2 * maxDecelerationFast*sensor1 < curr_vel*curr_vel*1000*1000 || |
jvfausto | 26:662693bd7f31 | 63 | 2 * maxDecelerationFast*sensor4 < curr_vel*curr_vel*1000*1000) && |
jvfausto | 21:3489cffad196 | 64 | (sensor1 < 1500 || sensor4 < 1500)) || |
jvfausto | 21:3489cffad196 | 65 | 550 > sensor1 || 550 > sensor4) |
jvfausto | 21:3489cffad196 | 66 | { |
jvfausto | 21:3489cffad196 | 67 | //out->printf("i am in danger\r\n"); |
jvfausto | 21:3489cffad196 | 68 | if(x->read() > def) |
jvfausto | 21:3489cffad196 | 69 | { |
jvfausto | 21:3489cffad196 | 70 | x->write(def); |
jvfausto | 21:3489cffad196 | 71 | forwardSafety = 1; |
jvfausto | 21:3489cffad196 | 72 | } |
jvfausto | 21:3489cffad196 | 73 | } |
jvfausto | 21:3489cffad196 | 74 | else |
jvfausto | 21:3489cffad196 | 75 | forwardSafety = 0; |
jvfausto | 26:662693bd7f31 | 76 | } |
jvfausto | 26:662693bd7f31 | 77 | */ |
jvfausto | 21:3489cffad196 | 78 | } |
ryanlin97 | 6:0cd57bdd8fbc | 79 | |
jvfausto | 21:3489cffad196 | 80 | /* Constructor for Wheelchair class */ |
jvfausto | 21:3489cffad196 | 81 | Wheelchair::Wheelchair(PinName xPin, PinName yPin, Serial* pc, Timer* time, QEI* qei, QEI* qeiS, |
jvfausto | 21:3489cffad196 | 82 | VL53L1X** ToFT) |
jvfausto | 21:3489cffad196 | 83 | { |
jvfausto | 21:3489cffad196 | 84 | x_position = 0; |
jvfausto | 21:3489cffad196 | 85 | y_position = 0; |
jvfausto | 21:3489cffad196 | 86 | forwardSafety = 0; |
jvfausto | 21:3489cffad196 | 87 | /* Initializes X and Y variables to Pins */ |
jvfausto | 21:3489cffad196 | 88 | x = new PwmOut(xPin); |
jvfausto | 21:3489cffad196 | 89 | y = new PwmOut(yPin); |
jvfausto | 21:3489cffad196 | 90 | /* Initializes IMU Library */ |
jvfausto | 26:662693bd7f31 | 91 | out = pc; // "out" is called for serial monitor |
jvfausto | 26:662693bd7f31 | 92 | out->printf("on\r\n"); |
jvfausto | 21:3489cffad196 | 93 | imu = new chair_BNO055(pc, time); |
jvfausto | 21:3489cffad196 | 94 | Wheelchair::stop(); // Wheelchair is initially stationary |
jvfausto | 21:3489cffad196 | 95 | imu->setup(); // turns on the IMU |
jvfausto | 21:3489cffad196 | 96 | wheelS = qeiS; // "wheel" is called for encoder |
jvfausto | 21:3489cffad196 | 97 | wheel = qei; |
jvfausto | 21:3489cffad196 | 98 | ToF = ToFT; // passes pointer with addresses of ToF sensors |
jvfausto | 21:3489cffad196 | 99 | |
jvfausto | 21:3489cffad196 | 100 | for(int i = 0; i < 12; i++) // initializes the ToF Sensors |
jvfausto | 21:3489cffad196 | 101 | { |
jvfausto | 21:3489cffad196 | 102 | (*(ToF+i))->initReading(0x31+((0x02)*i), 50000); |
jvfausto | 21:3489cffad196 | 103 | } |
jvfausto | 21:3489cffad196 | 104 | |
jvfausto | 21:3489cffad196 | 105 | out->printf("wheelchair setup done \r\n"); // Make sure it initialized; prints in serial monitor |
jvfausto | 21:3489cffad196 | 106 | ti = time; |
jvfausto | 21:3489cffad196 | 107 | |
jvfausto | 21:3489cffad196 | 108 | |
jvfausto | 21:3489cffad196 | 109 | myPID.SetMode(AUTOMATIC); // PID mode: Automatic |
jvfausto | 21:3489cffad196 | 110 | } |
jvfausto | 21:3489cffad196 | 111 | |
jvfausto | 21:3489cffad196 | 112 | /* Move wheelchair with joystick on manual mode */ |
jvfausto | 21:3489cffad196 | 113 | void Wheelchair::move(float x_coor, float y_coor) |
jvfausto | 21:3489cffad196 | 114 | { |
jvfausto | 21:3489cffad196 | 115 | /* Scales one joystick measurement to the chair's joystick measurement */ |
ryanlin97 | 4:29a27953fe70 | 116 | float scaled_x = ((x_coor * 1.6f) + 1.7f)/3.3f; |
ryanlin97 | 4:29a27953fe70 | 117 | float scaled_y = (3.3f - (y_coor * 1.6f))/3.3f; |
jvfausto | 21:3489cffad196 | 118 | |
jvfausto | 21:3489cffad196 | 119 | /* Sends the scaled joystic values to the chair */ |
jvfausto | 21:3489cffad196 | 120 | x->write(scaled_x); |
ryanlin97 | 4:29a27953fe70 | 121 | y->write(scaled_y); |
ryanlin97 | 5:e0ccaab3959a | 122 | } |
jvfausto | 21:3489cffad196 | 123 | |
jvfausto | 21:3489cffad196 | 124 | /* Automatic mode: move forward and update x,y coordinate sent to chair */ |
jvfausto | 21:3489cffad196 | 125 | void Wheelchair::forward() |
ryanlin97 | 1:c0beadca1617 | 126 | { |
jvfausto | 26:662693bd7f31 | 127 | //printf("current velosity; %f, curr vel S %f\r\n", curr_vel, curr_velS); |
jvfausto | 21:3489cffad196 | 128 | if(forwardSafety == 0) |
jvfausto | 21:3489cffad196 | 129 | { |
ryanlin97 | 0:fc0c4a184482 | 130 | x->write(high); |
ryanlin97 | 3:a5e71bfdb492 | 131 | y->write(def+offset); |
jvfausto | 21:3489cffad196 | 132 | } |
jvfausto | 26:662693bd7f31 | 133 | out->printf("%f, %f\r\n", curr_pos, wheelS->getDistance(53.975)); |
ryanlin97 | 0:fc0c4a184482 | 134 | } |
jvfausto | 21:3489cffad196 | 135 | |
jvfausto | 21:3489cffad196 | 136 | /* Automatic mode: move in reverse and update x,y coordinate sent to chair */ |
jvfausto | 21:3489cffad196 | 137 | void Wheelchair::backward() |
ryanlin97 | 1:c0beadca1617 | 138 | { |
ryanlin97 | 0:fc0c4a184482 | 139 | x->write(low); |
ryanlin97 | 0:fc0c4a184482 | 140 | y->write(def); |
ryanlin97 | 0:fc0c4a184482 | 141 | } |
jvfausto | 21:3489cffad196 | 142 | |
jvfausto | 21:3489cffad196 | 143 | /* Automatic mode: move right and update x,y coordinate sent to chair */ |
jvfausto | 21:3489cffad196 | 144 | void Wheelchair::right() |
ryanlin97 | 1:c0beadca1617 | 145 | { |
ryanlin97 | 0:fc0c4a184482 | 146 | x->write(def); |
ryanlin97 | 11:d14a1f7f1297 | 147 | y->write(low); |
ryanlin97 | 0:fc0c4a184482 | 148 | } |
ryanlin97 | 0:fc0c4a184482 | 149 | |
jvfausto | 21:3489cffad196 | 150 | /* Automatic mode: move left and update x,y coordinate sent to chair */ |
jvfausto | 21:3489cffad196 | 151 | void Wheelchair::left() |
ryanlin97 | 1:c0beadca1617 | 152 | { |
ryanlin97 | 0:fc0c4a184482 | 153 | x->write(def); |
ryanlin97 | 11:d14a1f7f1297 | 154 | y->write(high); |
ryanlin97 | 0:fc0c4a184482 | 155 | } |
jvfausto | 21:3489cffad196 | 156 | |
jvfausto | 21:3489cffad196 | 157 | /* Stop the wheelchair */ |
jvfausto | 21:3489cffad196 | 158 | void Wheelchair::stop() |
ryanlin97 | 1:c0beadca1617 | 159 | { |
ryanlin97 | 0:fc0c4a184482 | 160 | x->write(def); |
ryanlin97 | 0:fc0c4a184482 | 161 | y->write(def); |
ryanlin97 | 6:0cd57bdd8fbc | 162 | } |
jvfausto | 21:3489cffad196 | 163 | |
jvfausto | 21:3489cffad196 | 164 | /* Counter-clockwise is - |
jvfausto | 21:3489cffad196 | 165 | * Clockwise is + |
jvfausto | 21:3489cffad196 | 166 | * Range of deg: 0 to 360 |
jvfausto | 21:3489cffad196 | 167 | * This constructor takes in an angle from user and adjusts for turning right |
jvfausto | 21:3489cffad196 | 168 | */ |
jvfausto | 21:3489cffad196 | 169 | void Wheelchair::pid_right(int deg) |
ryanlin97 | 12:921488918749 | 170 | { |
jvfausto | 21:3489cffad196 | 171 | bool overturn = false; //Boolean if angle over 360˚ |
ryanlin97 | 12:921488918749 | 172 | |
jvfausto | 21:3489cffad196 | 173 | out->printf("pid right\r\r\n"); |
jvfausto | 21:3489cffad196 | 174 | x->write(def); // Update x sent to chair to be stationary |
jvfausto | 21:3489cffad196 | 175 | Setpoint = curr_yaw + deg; // Relative angle we want to turn |
jvfausto | 21:3489cffad196 | 176 | pid_yaw = curr_yaw; // Sets pid_yaw to angle input from user |
jvfausto | 21:3489cffad196 | 177 | |
jvfausto | 21:3489cffad196 | 178 | /* Turns on overturn boolean if setpoint over 360˚ */ |
jvfausto | 21:3489cffad196 | 179 | if(Setpoint > 360) |
jvfausto | 21:3489cffad196 | 180 | { |
ryanlin97 | 12:921488918749 | 181 | overturn = true; |
ryanlin97 | 12:921488918749 | 182 | } |
jvfausto | 21:3489cffad196 | 183 | |
jvfausto | 21:3489cffad196 | 184 | myPID.SetTunings(5.5,0, 0.0035); // Sets the constants for P and D |
jvfausto | 21:3489cffad196 | 185 | myPID.SetOutputLimits(0, def-low-.15); // Limit is set to the differnce between def and low |
jvfausto | 21:3489cffad196 | 186 | myPID.SetControllerDirection(DIRECT); // PID mode: Direct |
jvfausto | 21:3489cffad196 | 187 | |
jvfausto | 21:3489cffad196 | 188 | /* PID stops when approaching a litte less than desired angle */ |
jvfausto | 21:3489cffad196 | 189 | while(pid_yaw < Setpoint - 3) |
jvfausto | 21:3489cffad196 | 190 | { |
jvfausto | 21:3489cffad196 | 191 | /* PID is set to correct angle range if angle greater than 360˚*/ |
jvfausto | 17:7f3b69300bb6 | 192 | if(overturn && curr_yaw < Setpoint-deg-1) |
jvfausto | 17:7f3b69300bb6 | 193 | { |
jvfausto | 21:3489cffad196 | 194 | pid_yaw = curr_yaw + 360; |
jvfausto | 21:3489cffad196 | 195 | } |
jvfausto | 21:3489cffad196 | 196 | else |
jvfausto | 21:3489cffad196 | 197 | { |
jvfausto | 17:7f3b69300bb6 | 198 | pid_yaw = curr_yaw; |
ryanlin97 | 12:921488918749 | 199 | } |
jvfausto | 21:3489cffad196 | 200 | |
jvfausto | 21:3489cffad196 | 201 | myPID.Compute(); // Does PID calculations |
jvfausto | 21:3489cffad196 | 202 | double tempor = -Output+def; // Temporary value with the voltage output |
jvfausto | 21:3489cffad196 | 203 | y->write(tempor); // Update y sent to chair |
jvfausto | 21:3489cffad196 | 204 | |
jvfausto | 21:3489cffad196 | 205 | /* Prints to serial monitor the current angle and setpoint */ |
jvfausto | 21:3489cffad196 | 206 | out->printf("curr_yaw %f\r\r\n", curr_yaw); |
jvfausto | 21:3489cffad196 | 207 | out->printf("Setpoint = %f \r\n", Setpoint); |
jvfausto | 21:3489cffad196 | 208 | |
jvfausto | 21:3489cffad196 | 209 | wait(.05); // Small delay (milliseconds) |
ryanlin97 | 12:921488918749 | 210 | } |
jvfausto | 21:3489cffad196 | 211 | |
jvfausto | 21:3489cffad196 | 212 | /* Saftey stop for wheelchair */ |
jvfausto | 21:3489cffad196 | 213 | Wheelchair::stop(); |
jvfausto | 21:3489cffad196 | 214 | out->printf("done \r\n"); |
jvfausto | 21:3489cffad196 | 215 | } |
jvfausto | 21:3489cffad196 | 216 | |
jvfausto | 21:3489cffad196 | 217 | /* Counter-clockwise is - |
jvfausto | 21:3489cffad196 | 218 | * Clockwise is + |
jvfausto | 21:3489cffad196 | 219 | * Range of deg: 0 to 360 |
jvfausto | 21:3489cffad196 | 220 | * This constructor takes in an angle from user and adjusts for turning left |
jvfausto | 21:3489cffad196 | 221 | */ |
jvfausto | 21:3489cffad196 | 222 | void Wheelchair::pid_left(int deg) |
ryanlin97 | 12:921488918749 | 223 | { |
jvfausto | 21:3489cffad196 | 224 | bool overturn = false; //Boolean if angle under 0˚ |
ryanlin97 | 12:921488918749 | 225 | |
jvfausto | 21:3489cffad196 | 226 | out->printf("pid Left\r\r\n"); |
jvfausto | 21:3489cffad196 | 227 | x->write(def); // Update x sent to chair to be stationary |
jvfausto | 21:3489cffad196 | 228 | Setpoint = curr_yaw - deg; // Relative angle we want to turn |
jvfausto | 21:3489cffad196 | 229 | pid_yaw = curr_yaw; // Sets pid_yaw to angle input from user |
jvfausto | 21:3489cffad196 | 230 | |
jvfausto | 21:3489cffad196 | 231 | /* Turns on overturn boolean if setpoint less than 0˚ */ |
jvfausto | 21:3489cffad196 | 232 | if(Setpoint < 0) |
jvfausto | 21:3489cffad196 | 233 | { |
ryanlin97 | 12:921488918749 | 234 | overturn = true; |
ryanlin97 | 12:921488918749 | 235 | } |
jvfausto | 21:3489cffad196 | 236 | |
jvfausto | 21:3489cffad196 | 237 | myPID.SetTunings(5,0, 0.004); // Sets the constants for P and D |
jvfausto | 21:3489cffad196 | 238 | myPID.SetOutputLimits(0,high-def-.12); //Limit is set to the differnce between def and low |
jvfausto | 21:3489cffad196 | 239 | myPID.SetControllerDirection(REVERSE); // PID mode: Reverse |
jvfausto | 21:3489cffad196 | 240 | |
jvfausto | 21:3489cffad196 | 241 | /* PID stops when approaching a litte more than desired angle */ |
jvfausto | 21:3489cffad196 | 242 | while(pid_yaw > Setpoint+3) |
jvfausto | 21:3489cffad196 | 243 | { |
jvfausto | 21:3489cffad196 | 244 | /* PID is set to correct angle range if angle less than 0˚ */ |
jvfausto | 21:3489cffad196 | 245 | if(overturn && curr_yaw > Setpoint+deg+1) |
jvfausto | 17:7f3b69300bb6 | 246 | { |
jvfausto | 17:7f3b69300bb6 | 247 | pid_yaw = curr_yaw - 360; |
jvfausto | 21:3489cffad196 | 248 | } |
jvfausto | 21:3489cffad196 | 249 | else |
jvfausto | 21:3489cffad196 | 250 | { |
jvfausto | 21:3489cffad196 | 251 | pid_yaw = curr_yaw; |
jvfausto | 21:3489cffad196 | 252 | } |
jvfausto | 21:3489cffad196 | 253 | |
jvfausto | 21:3489cffad196 | 254 | myPID.Compute(); // Does PID calculations |
jvfausto | 21:3489cffad196 | 255 | double tempor = Output+def; // Temporary value with the voltage output |
jvfausto | 21:3489cffad196 | 256 | y->write(tempor); // Update y sent to chair |
jvfausto | 21:3489cffad196 | 257 | |
jvfausto | 21:3489cffad196 | 258 | /* Prints to serial monitor the current angle and setpoint */ |
jvfausto | 17:7f3b69300bb6 | 259 | out->printf("curr_yaw %f\r\n", curr_yaw); |
jvfausto | 21:3489cffad196 | 260 | out->printf("Setpoint = %f \r\n", Setpoint); |
jvfausto | 21:3489cffad196 | 261 | |
jvfausto | 21:3489cffad196 | 262 | wait(.05); // Small delay (milliseconds) |
ryanlin97 | 12:921488918749 | 263 | } |
jvfausto | 21:3489cffad196 | 264 | |
jvfausto | 21:3489cffad196 | 265 | /* Saftey stop for wheelchair */ |
jvfausto | 21:3489cffad196 | 266 | Wheelchair::stop(); |
jvfausto | 21:3489cffad196 | 267 | out->printf("done \r\n"); |
ryanlin97 | 12:921488918749 | 268 | |
jvfausto | 21:3489cffad196 | 269 | } |
jvfausto | 21:3489cffad196 | 270 | |
jvfausto | 21:3489cffad196 | 271 | /* This constructor determines whether to turn left or right */ |
jvfausto | 21:3489cffad196 | 272 | void Wheelchair::pid_turn(int deg) |
jvfausto | 21:3489cffad196 | 273 | { |
jvfausto | 21:3489cffad196 | 274 | |
jvfausto | 21:3489cffad196 | 275 | /* Sets angle to coterminal angle for left turn if deg > 180 |
jvfausto | 21:3489cffad196 | 276 | * Sets angle to coterminal angle for right turn if deg < -180 |
jvfausto | 21:3489cffad196 | 277 | */ |
jvfausto | 21:3489cffad196 | 278 | if(deg > 180) |
jvfausto | 21:3489cffad196 | 279 | { |
ryanlin97 | 12:921488918749 | 280 | deg -= 360; |
ryanlin97 | 12:921488918749 | 281 | } |
jvfausto | 21:3489cffad196 | 282 | else if(deg < -180) |
jvfausto | 21:3489cffad196 | 283 | { |
jvfausto | 21:3489cffad196 | 284 | deg +=360; |
ryanlin97 | 12:921488918749 | 285 | } |
ryanlin97 | 12:921488918749 | 286 | |
jvfausto | 21:3489cffad196 | 287 | /* Makes sure angle inputted to function is positive */ |
ryanlin97 | 12:921488918749 | 288 | int turnAmt = abs(deg); |
jvfausto | 21:3489cffad196 | 289 | |
jvfausto | 21:3489cffad196 | 290 | /* Calls PID_right if deg > 0, else calls PID_left if deg < 0 */ |
jvfausto | 21:3489cffad196 | 291 | if(deg >= 0) |
jvfausto | 21:3489cffad196 | 292 | { |
jvfausto | 21:3489cffad196 | 293 | Wheelchair::pid_right(turnAmt); |
jvfausto | 21:3489cffad196 | 294 | } |
jvfausto | 21:3489cffad196 | 295 | else |
jvfausto | 21:3489cffad196 | 296 | { |
jvfausto | 21:3489cffad196 | 297 | Wheelchair::pid_left(turnAmt); |
jvfausto | 21:3489cffad196 | 298 | } |
ryanlin97 | 12:921488918749 | 299 | |
jvfausto | 21:3489cffad196 | 300 | } |
jvfausto | 21:3489cffad196 | 301 | |
jvfausto | 21:3489cffad196 | 302 | /* This constructor takes in distance to travel and adjust to move forward */ |
jvfausto | 19:71a6621ee5c3 | 303 | void Wheelchair::pid_forward(double mm) |
jvfausto | 17:7f3b69300bb6 | 304 | { |
jvfausto | 21:3489cffad196 | 305 | mm -= 20; // Makes sure distance does not overshoot |
jvfausto | 21:3489cffad196 | 306 | Input = 0; // Initializes input to zero: Test latter w/o |
jvfausto | 21:3489cffad196 | 307 | wheel->reset(); // Resets encoders so that they start at 0 |
jvfausto | 21:3489cffad196 | 308 | |
jvfausto | 17:7f3b69300bb6 | 309 | out->printf("pid foward\r\n"); |
jvfausto | 21:3489cffad196 | 310 | |
jvfausto | 21:3489cffad196 | 311 | double tempor; // Initializes Temporary variable for x input |
jvfausto | 21:3489cffad196 | 312 | Setpoint = mm; // Initializes the setpoint to desired value |
jvfausto | 21:3489cffad196 | 313 | |
jvfausto | 21:3489cffad196 | 314 | myPIDDistance.SetTunings(5.5,0, 0.0015); // Sets constants for P and D |
jvfausto | 21:3489cffad196 | 315 | myPIDDistance.SetOutputLimits(0,high-def-.15); // Limit set to difference between high and def |
jvfausto | 21:3489cffad196 | 316 | myPIDDistance.SetControllerDirection(DIRECT); // PID mode: Direct |
jvfausto | 21:3489cffad196 | 317 | |
jvfausto | 21:3489cffad196 | 318 | y->write(def+offset); // Update y to make chair stationary |
jvfausto | 21:3489cffad196 | 319 | |
jvfausto | 21:3489cffad196 | 320 | /* Chair stops moving when Setpoint is reached */ |
jvfausto | 21:3489cffad196 | 321 | while(Input < Setpoint){ |
jvfausto | 21:3489cffad196 | 322 | |
jvfausto | 21:3489cffad196 | 323 | if(out->readable()) // Emergency Break |
jvfausto | 21:3489cffad196 | 324 | { |
jvfausto | 21:3489cffad196 | 325 | break; |
jvfausto | 21:3489cffad196 | 326 | } |
jvfausto | 17:7f3b69300bb6 | 327 | |
jvfausto | 21:3489cffad196 | 328 | Input = wheel->getDistance(53.975); // Gets distance from Encoder into PID |
jvfausto | 21:3489cffad196 | 329 | wait(.05); // Slight Delay: *****Test without |
jvfausto | 21:3489cffad196 | 330 | myPIDDistance.Compute(); // Compute distance traveled by chair |
jvfausto | 21:3489cffad196 | 331 | |
jvfausto | 21:3489cffad196 | 332 | tempor = Output + def; // Temporary output variable |
jvfausto | 21:3489cffad196 | 333 | x->write(tempor); // Update x sent to chair |
jvfausto | 17:7f3b69300bb6 | 334 | |
jvfausto | 21:3489cffad196 | 335 | /* Prints to serial monitor the distance traveled by chair */ |
jvfausto | 19:71a6621ee5c3 | 336 | out->printf("distance %f\r\n", Input); |
jvfausto | 17:7f3b69300bb6 | 337 | } |
ryanlin97 | 12:921488918749 | 338 | |
jvfausto | 17:7f3b69300bb6 | 339 | } |
jvfausto | 21:3489cffad196 | 340 | |
jvfausto | 21:3489cffad196 | 341 | /* This constructor returns the relative angular position of chair */ |
jvfausto | 21:3489cffad196 | 342 | double Wheelchair::getTwistZ() |
jvfausto | 17:7f3b69300bb6 | 343 | { |
jvfausto | 21:3489cffad196 | 344 | return imu->gyro_z(); |
jvfausto | 21:3489cffad196 | 345 | } |
jvfausto | 18:663b6d693252 | 346 | |
jvfausto | 21:3489cffad196 | 347 | /* This constructor computes the relative angle for Twist message in ROS */ |
jvfausto | 21:3489cffad196 | 348 | void Wheelchair::pid_twistA() |
jvfausto | 21:3489cffad196 | 349 | { |
jvfausto | 21:3489cffad196 | 350 | /* Initialize variables for angle and update x,y sent to chair */ |
jvfausto | 21:3489cffad196 | 351 | char c; |
jvfausto | 21:3489cffad196 | 352 | double temporA = def; |
jvfausto | 21:3489cffad196 | 353 | y->write(def); |
jvfausto | 21:3489cffad196 | 354 | x->write(def); |
jvfausto | 21:3489cffad196 | 355 | |
jvfausto | 21:3489cffad196 | 356 | PIDAngularV.SetTunings(.00015,0, 0.00); // Sets the constants for P and D |
jvfausto | 21:3489cffad196 | 357 | PIDAngularV.SetOutputLimits(-.1, .1); // Limit set to be in range specified |
jvfausto | 21:3489cffad196 | 358 | PIDAngularV.SetControllerDirection(DIRECT); // PID mode: Direct |
jvfausto | 21:3489cffad196 | 359 | |
jvfausto | 21:3489cffad196 | 360 | /* Computes angular position of wheelchair while turning */ |
jvfausto | 21:3489cffad196 | 361 | while(1) |
jvfausto | 21:3489cffad196 | 362 | { |
jvfausto | 21:3489cffad196 | 363 | yDesired = angularV; |
jvfausto | 21:3489cffad196 | 364 | |
jvfausto | 21:3489cffad196 | 365 | /* Update and set all variable so that the chair is stationary |
jvfausto | 21:3489cffad196 | 366 | * if the desired angle is zero |
jvfausto | 21:3489cffad196 | 367 | */ |
jvfausto | 21:3489cffad196 | 368 | if(yDesired == 0) |
jvfausto | 18:663b6d693252 | 369 | { |
jvfausto | 21:3489cffad196 | 370 | x->write(def); |
jvfausto | 21:3489cffad196 | 371 | y->write(def); |
jvfausto | 21:3489cffad196 | 372 | yDesired = 0; |
ryanlin97 | 8:381a4ec3fef8 | 373 | return; |
ryanlin97 | 7:5e38d43fbce3 | 374 | } |
jvfausto | 21:3489cffad196 | 375 | |
jvfausto | 21:3489cffad196 | 376 | /* Continuously updates with current angle measured by IMU */ |
jvfausto | 21:3489cffad196 | 377 | yIn = imu->gyro_z(); |
jvfausto | 21:3489cffad196 | 378 | PIDAngularV.Compute(); |
jvfausto | 21:3489cffad196 | 379 | temporA += yOut; // Temporary value with the voltage output |
jvfausto | 21:3489cffad196 | 380 | y->write(temporA); // Update y sent to chair |
jvfausto | 21:3489cffad196 | 381 | |
jvfausto | 21:3489cffad196 | 382 | //out->printf("temporA: %f, yDesired %f, angle: %f\r\n", temporA, yDesired, imu->gyro_z()); |
jvfausto | 21:3489cffad196 | 383 | wait(.05); // Small delay (milliseconds) |
ryanlin97 | 6:0cd57bdd8fbc | 384 | } |
jvfausto | 21:3489cffad196 | 385 | |
jvfausto | 21:3489cffad196 | 386 | } |
ryanlin97 | 6:0cd57bdd8fbc | 387 | |
jvfausto | 21:3489cffad196 | 388 | /* This constructor computes the relative velocity for Twist message in ROS */ |
jvfausto | 21:3489cffad196 | 389 | void Wheelchair::pid_twistV() |
ryanlin97 | 6:0cd57bdd8fbc | 390 | { |
jvfausto | 21:3489cffad196 | 391 | /* Initializes variables as default */ |
jvfausto | 21:3489cffad196 | 392 | double temporV = def; |
jvfausto | 26:662693bd7f31 | 393 | double temporS = def+offset; |
jvfausto | 21:3489cffad196 | 394 | vDesiredS = 0; |
jvfausto | 21:3489cffad196 | 395 | x->write(def); |
jvfausto | 21:3489cffad196 | 396 | y->write(def); |
jvfausto | 21:3489cffad196 | 397 | wheel->reset(); // Resets the encoders |
jvfausto | 21:3489cffad196 | 398 | /* Sets the constants for P and D */ |
jvfausto | 21:3489cffad196 | 399 | PIDVelosity.SetTunings(.0005,0, 0.00); |
jvfausto | 26:662693bd7f31 | 400 | PIDSlaveV.SetTunings(.005,0.000001, 0.000001); |
jvfausto | 21:3489cffad196 | 401 | |
jvfausto | 21:3489cffad196 | 402 | /* Limits to the range specified */ |
jvfausto | 21:3489cffad196 | 403 | PIDVelosity.SetOutputLimits(-.005, .005); |
jvfausto | 21:3489cffad196 | 404 | PIDSlaveV.SetOutputLimits(-.002, .002); |
jvfausto | 21:3489cffad196 | 405 | |
jvfausto | 21:3489cffad196 | 406 | /* PID mode: Direct */ |
jvfausto | 21:3489cffad196 | 407 | PIDVelosity.SetControllerDirection(DIRECT); |
jvfausto | 21:3489cffad196 | 408 | PIDSlaveV.SetControllerDirection(DIRECT); |
jvfausto | 21:3489cffad196 | 409 | |
jvfausto | 21:3489cffad196 | 410 | while(1) |
jvfausto | 21:3489cffad196 | 411 | { |
jvfausto | 21:3489cffad196 | 412 | linearV = .7; |
jvfausto | 21:3489cffad196 | 413 | test1 = linearV*100; |
jvfausto | 21:3489cffad196 | 414 | vel = curr_vel; |
jvfausto | 21:3489cffad196 | 415 | vDesired = linearV*100; |
jvfausto | 21:3489cffad196 | 416 | if(out->readable()) |
jvfausto | 21:3489cffad196 | 417 | return; |
jvfausto | 21:3489cffad196 | 418 | /* Update and set all variable so that the chair is stationary |
jvfausto | 21:3489cffad196 | 419 | * if the velocity is zero |
jvfausto | 21:3489cffad196 | 420 | */ |
jvfausto | 21:3489cffad196 | 421 | if(linearV == 0) |
jvfausto | 21:3489cffad196 | 422 | { |
jvfausto | 21:3489cffad196 | 423 | x->write(def); |
jvfausto | 21:3489cffad196 | 424 | y->write(def); |
ryanlin97 | 8:381a4ec3fef8 | 425 | |
jvfausto | 21:3489cffad196 | 426 | vel = 0; |
jvfausto | 21:3489cffad196 | 427 | vDesired = 0; |
jvfausto | 21:3489cffad196 | 428 | dist_old = 0; |
ryanlin97 | 8:381a4ec3fef8 | 429 | return; |
ryanlin97 | 8:381a4ec3fef8 | 430 | } |
jvfausto | 21:3489cffad196 | 431 | |
jvfausto | 21:3489cffad196 | 432 | if(vDesired >= 0) |
jvfausto | 21:3489cffad196 | 433 | { |
jvfausto | 21:3489cffad196 | 434 | PIDVelosity.SetTunings(.000004,0, 0.00); // Sets the constants for P and D |
jvfausto | 21:3489cffad196 | 435 | PIDVelosity.SetOutputLimits(-.002, .002); // Limits to the range specified |
jvfausto | 21:3489cffad196 | 436 | } |
jvfausto | 21:3489cffad196 | 437 | else |
jvfausto | 21:3489cffad196 | 438 | { |
jvfausto | 21:3489cffad196 | 439 | PIDVelosity.SetTunings(.000015,0, 0.00); // Sets the constants for P and D |
jvfausto | 21:3489cffad196 | 440 | PIDVelosity.SetOutputLimits(-.0005, .0005); // Limits to range specified |
jvfausto | 21:3489cffad196 | 441 | } |
jvfausto | 21:3489cffad196 | 442 | |
jvfausto | 21:3489cffad196 | 443 | /* Sets maximum value of variable to 1 */ |
jvfausto | 21:3489cffad196 | 444 | if(temporV >= 1.5) |
jvfausto | 21:3489cffad196 | 445 | { |
jvfausto | 21:3489cffad196 | 446 | temporV = 1.5; |
ryanlin97 | 8:381a4ec3fef8 | 447 | } |
jvfausto | 21:3489cffad196 | 448 | /* Scales and makes some adjustments to velocity */ |
jvfausto | 21:3489cffad196 | 449 | vIn = curr_vel*100; |
jvfausto | 21:3489cffad196 | 450 | vInS = curr_vel-curr_velS; |
jvfausto | 21:3489cffad196 | 451 | PIDVelosity.Compute(); |
jvfausto | 21:3489cffad196 | 452 | PIDSlaveV.Compute(); |
jvfausto | 21:3489cffad196 | 453 | if(forwardSafety == 0) |
jvfausto | 21:3489cffad196 | 454 | { |
jvfausto | 21:3489cffad196 | 455 | temporV += vOut; |
jvfausto | 21:3489cffad196 | 456 | temporS += vOutS; |
jvfausto | 21:3489cffad196 | 457 | |
jvfausto | 21:3489cffad196 | 458 | /* Updates x,y sent to Wheelchair and for Odometry message in ROS */ |
jvfausto | 21:3489cffad196 | 459 | x->write(temporV); |
jvfausto | 21:3489cffad196 | 460 | test2 = temporV; |
jvfausto | 21:3489cffad196 | 461 | y->write(temporS); |
jvfausto | 21:3489cffad196 | 462 | } |
jvfausto | 21:3489cffad196 | 463 | else |
jvfausto | 21:3489cffad196 | 464 | { |
jvfausto | 21:3489cffad196 | 465 | x->write(def); |
jvfausto | 21:3489cffad196 | 466 | y->write(def); |
jvfausto | 21:3489cffad196 | 467 | } |
jvfausto | 21:3489cffad196 | 468 | //out->printf("Velosity: %f, Velosity2: %f, temporV %f, temporS %f\r\n", curr_vel, curr_velS, temporV, temporS); |
jvfausto | 21:3489cffad196 | 469 | Wheelchair::odomMsg(); |
jvfausto | 21:3489cffad196 | 470 | wait(.01); // Small delay (milliseconds) |
ryanlin97 | 6:0cd57bdd8fbc | 471 | } |
ryanlin97 | 11:d14a1f7f1297 | 472 | } |
ryanlin97 | 11:d14a1f7f1297 | 473 | |
jvfausto | 21:3489cffad196 | 474 | /* This constructor calculates the relative position of the chair everytime the encoders reset |
jvfausto | 21:3489cffad196 | 475 | * by setting its old position as the origin to calculate the new position |
jvfausto | 21:3489cffad196 | 476 | */ |
jvfausto | 21:3489cffad196 | 477 | void Wheelchair::odomMsg() |
ryanlin97 | 11:d14a1f7f1297 | 478 | { |
jvfausto | 21:3489cffad196 | 479 | double dist_new = curr_pos; |
jvfausto | 21:3489cffad196 | 480 | double dist = dist_new-dist_old; |
jvfausto | 21:3489cffad196 | 481 | double temp_x = dist*sin(z_angular*3.14159/180); |
jvfausto | 21:3489cffad196 | 482 | double temp_y = dist*cos(z_angular*3.14159/180); |
jvfausto | 21:3489cffad196 | 483 | |
jvfausto | 21:3489cffad196 | 484 | x_position += temp_x; |
jvfausto | 21:3489cffad196 | 485 | y_position += temp_y; |
ryanlin97 | 11:d14a1f7f1297 | 486 | |
jvfausto | 21:3489cffad196 | 487 | dist_old = dist_new; |
jvfausto | 21:3489cffad196 | 488 | } |
jvfausto | 21:3489cffad196 | 489 | |
jvfausto | 21:3489cffad196 | 490 | /* This constructor prints the Odometry message to the serial monitor */ |
jvfausto | 21:3489cffad196 | 491 | void Wheelchair::showOdom() |
jvfausto | 21:3489cffad196 | 492 | { |
jvfausto | 21:3489cffad196 | 493 | out->printf("x %f, y %f, angle %f", x_position, y_position, z_angular); |
jvfausto | 21:3489cffad196 | 494 | } |
jvfausto | 21:3489cffad196 | 495 | |
jvfausto | 21:3489cffad196 | 496 | /* This constructor returns the approximate distance based on the wheel diameter */ |
jvfausto | 21:3489cffad196 | 497 | float Wheelchair::getDistance() |
jvfausto | 21:3489cffad196 | 498 | { |
jvfausto | 21:3489cffad196 | 499 | return wheel->getDistance(Diameter); |
ryanlin97 | 6:0cd57bdd8fbc | 500 | } |
ryanlin97 | 8:381a4ec3fef8 | 501 | |
jvfausto | 21:3489cffad196 | 502 | /* This constructor resets the wheel encoder's */ |
jvfausto | 21:3489cffad196 | 503 | void Wheelchair::resetDistance() |
jvfausto | 21:3489cffad196 | 504 | { |
ryanlin97 | 12:921488918749 | 505 | wheel->reset(); |
jvfausto | 21:3489cffad196 | 506 | } |
jvfausto | 21:3489cffad196 | 507 | |
jvfausto | 21:3489cffad196 | 508 | |
jvfausto | 21:3489cffad196 | 509 | /*Predetermined paths For Demmo*/ |
jvfausto | 21:3489cffad196 | 510 | void Wheelchair::desk() |
jvfausto | 21:3489cffad196 | 511 | { |
jvfausto | 19:71a6621ee5c3 | 512 | Wheelchair::pid_forward(5461); |
jvfausto | 19:71a6621ee5c3 | 513 | Wheelchair::pid_right(87); |
jvfausto | 19:71a6621ee5c3 | 514 | Wheelchair::pid_forward(3658); |
jvfausto | 19:71a6621ee5c3 | 515 | Wheelchair::pid_right(87); |
jvfausto | 19:71a6621ee5c3 | 516 | Wheelchair::pid_forward(3658); |
jvfausto | 21:3489cffad196 | 517 | } |
jvfausto | 21:3489cffad196 | 518 | |
jvfausto | 21:3489cffad196 | 519 | void Wheelchair::kitchen() |
jvfausto | 21:3489cffad196 | 520 | { |
jvfausto | 19:71a6621ee5c3 | 521 | Wheelchair::pid_forward(5461); |
jvfausto | 20:f42db4ae16f0 | 522 | Wheelchair::pid_right(87); |
jvfausto | 19:71a6621ee5c3 | 523 | Wheelchair::pid_forward(3658); |
jvfausto | 19:71a6621ee5c3 | 524 | Wheelchair::pid_left(90); |
jvfausto | 19:71a6621ee5c3 | 525 | Wheelchair::pid_forward(305); |
jvfausto | 21:3489cffad196 | 526 | } |
jvfausto | 21:3489cffad196 | 527 | |
jvfausto | 21:3489cffad196 | 528 | void Wheelchair::desk_to_kitchen() |
jvfausto | 21:3489cffad196 | 529 | { |
jvfausto | 19:71a6621ee5c3 | 530 | Wheelchair::pid_right(180); |
jvfausto | 19:71a6621ee5c3 | 531 | Wheelchair::pid_forward(3700); |
jvfausto | 21:3489cffad196 | 532 | } |