Code to run the microcontrollers on the R5 competition bot
Dependencies: LineSensors mbed
DriveController.cpp@12:edcae0f36e9c, 2014-11-14 (annotated)
- Committer:
- Hypna
- Date:
- Fri Nov 14 18:51:04 2014 +0000
- Revision:
- 12:edcae0f36e9c
- Parent:
- 11:5d20ce95e137
- Child:
- 13:aa6f64c73271
adjusted error correction algorithm
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
Hypna | 0:e60f22c1d573 | 1 | #include "DriveController.h" |
Hypna | 0:e60f22c1d573 | 2 | |
Hypna | 12:edcae0f36e9c | 3 | #define MOTOR_SCALE 0.4 |
Hypna | 12:edcae0f36e9c | 4 | #define CORRECTION_SCALE 0.05 |
Hypna | 9:01c17b286a99 | 5 | |
Hypna | 10:210c8f1e3a92 | 6 | DriveController::DriveController() : i2c(PTC2, PTC1), wheelSpeed1(PTB0), wheelSpeed2(PTB1), wheelSpeed3(PTB2), |
Hypna | 5:f53f06a866e9 | 7 | wheelSpeed4(PTB3), wheelDirection1(PTE20), wheelDirection2(PTE21), wheelDirection3(PTE22), wheelDirection4(PTE23), |
Hypna | 5:f53f06a866e9 | 8 | sensors(PTC7, PTC0, PTC3, PTC4, PTC5, PTC6, PTC10, PTC11, PTC9, PTC8, PTA5, PTA4, PTA12, PTD4, PTA2, PTA1, PTC12, PTC13, |
Hypna | 5:f53f06a866e9 | 9 | PTC16, PTC17, PTD1, PTD0, PTD5, PTD13) |
Hypna | 2:d0ce8e26cbc4 | 10 | { |
Hypna | 4:ac6b2e5b240b | 11 | |
Hypna | 2:d0ce8e26cbc4 | 12 | } |
Hypna | 2:d0ce8e26cbc4 | 13 | |
Hypna | 4:ac6b2e5b240b | 14 | void DriveController::go() |
Hypna | 0:e60f22c1d573 | 15 | { |
Hypna | 10:210c8f1e3a92 | 16 | sensors.setThreshold(); |
Hypna | 10:210c8f1e3a92 | 17 | |
Hypna | 10:210c8f1e3a92 | 18 | wait(10); |
Hypna | 10:210c8f1e3a92 | 19 | |
Hypna | 10:210c8f1e3a92 | 20 | wheelSpeed1.period_us(50); //setting pwm period for all wheels to 20khz |
Hypna | 10:210c8f1e3a92 | 21 | wheelSpeed2.period_us(50); |
Hypna | 10:210c8f1e3a92 | 22 | wheelSpeed3.period_us(50); |
Hypna | 10:210c8f1e3a92 | 23 | wheelSpeed4.period_us(50); |
Hypna | 10:210c8f1e3a92 | 24 | |
Hypna | 12:edcae0f36e9c | 25 | //spinTest(); |
Hypna | 12:edcae0f36e9c | 26 | |
Hypna | 6:83c1f8d6a65a | 27 | while(true) //test loop |
Hypna | 6:83c1f8d6a65a | 28 | { |
Hypna | 6:83c1f8d6a65a | 29 | move(); |
Hypna | 10:210c8f1e3a92 | 30 | wait(1); |
Hypna | 6:83c1f8d6a65a | 31 | rotate('R'); |
Hypna | 10:210c8f1e3a92 | 32 | wait(1); |
Hypna | 6:83c1f8d6a65a | 33 | rotate('R'); |
Hypna | 10:210c8f1e3a92 | 34 | wait(1); |
Hypna | 6:83c1f8d6a65a | 35 | move(); |
Hypna | 10:210c8f1e3a92 | 36 | wait(1); |
Hypna | 6:83c1f8d6a65a | 37 | } |
Hypna | 6:83c1f8d6a65a | 38 | |
Hypna | 6:83c1f8d6a65a | 39 | /*while(true) |
Hypna | 2:d0ce8e26cbc4 | 40 | { |
Hypna | 2:d0ce8e26cbc4 | 41 | getCommand(); |
Hypna | 3:0d7687b6ef14 | 42 | |
Hypna | 5:f53f06a866e9 | 43 | switch(command) |
Hypna | 5:f53f06a866e9 | 44 | { |
Hypna | 5:f53f06a866e9 | 45 | case 0: move(); //move forward |
Hypna | 5:f53f06a866e9 | 46 | break; |
Hypna | 5:f53f06a866e9 | 47 | case 1: move('B'); //move backward |
Hypna | 5:f53f06a866e9 | 48 | break; |
Hypna | 5:f53f06a866e9 | 49 | case 2: rotate('R'); //rotate right |
Hypna | 5:f53f06a866e9 | 50 | break; |
Hypna | 5:f53f06a866e9 | 51 | case 3: rotate('L'); //rotate left |
Hypna | 5:f53f06a866e9 | 52 | } |
Hypna | 3:0d7687b6ef14 | 53 | |
Hypna | 3:0d7687b6ef14 | 54 | sendComplete(); |
Hypna | 6:83c1f8d6a65a | 55 | }*/ |
Hypna | 2:d0ce8e26cbc4 | 56 | } |
Hypna | 2:d0ce8e26cbc4 | 57 | |
Hypna | 5:f53f06a866e9 | 58 | void DriveController::move(char direction) |
Hypna | 2:d0ce8e26cbc4 | 59 | { |
Hypna | 5:f53f06a866e9 | 60 | bool atLine = true; //tracks whether the bot is still at the starting intersection |
Hypna | 12:edcae0f36e9c | 61 | double error = 0; |
Hypna | 2:d0ce8e26cbc4 | 62 | |
Hypna | 5:f53f06a866e9 | 63 | if(direction == 'B') |
Hypna | 10:210c8f1e3a92 | 64 | { |
Hypna | 11:5d20ce95e137 | 65 | wheelDirection1 = wheelDirection2 = wheelDirection3 = wheelDirection4 = 0; |
Hypna | 9:01c17b286a99 | 66 | } |
Hypna | 5:f53f06a866e9 | 67 | else |
Hypna | 9:01c17b286a99 | 68 | { |
Hypna | 11:5d20ce95e137 | 69 | wheelDirection1 = wheelDirection2 = wheelDirection3 = wheelDirection4 = 1; |
Hypna | 9:01c17b286a99 | 70 | } |
Hypna | 2:d0ce8e26cbc4 | 71 | |
Hypna | 5:f53f06a866e9 | 72 | do |
Hypna | 2:d0ce8e26cbc4 | 73 | { |
Hypna | 6:83c1f8d6a65a | 74 | sensors.lineDetect(sensorStates); |
Hypna | 6:83c1f8d6a65a | 75 | |
Hypna | 5:f53f06a866e9 | 76 | if(intersection()) |
Hypna | 5:f53f06a866e9 | 77 | { |
Hypna | 9:01c17b286a99 | 78 | wheelSpeed1 = wheelSpeed2 = wheelSpeed3 = wheelSpeed4 = MOTOR_SCALE; |
Hypna | 5:f53f06a866e9 | 79 | } |
Hypna | 5:f53f06a866e9 | 80 | else |
Hypna | 3:0d7687b6ef14 | 81 | { |
Hypna | 5:f53f06a866e9 | 82 | error = calculateError(); |
Hypna | 5:f53f06a866e9 | 83 | |
Hypna | 5:f53f06a866e9 | 84 | if(error < 0) |
Hypna | 5:f53f06a866e9 | 85 | { |
Hypna | 12:edcae0f36e9c | 86 | wheelSpeed1 = wheelSpeed3 = (1.0 - fabs(error))*MOTOR_SCALE; |
Hypna | 12:edcae0f36e9c | 87 | wheelSpeed2 = wheelSpeed4 = MOTOR_SCALE; |
Hypna | 6:83c1f8d6a65a | 88 | } |
Hypna | 5:f53f06a866e9 | 89 | else |
Hypna | 5:f53f06a866e9 | 90 | { |
Hypna | 12:edcae0f36e9c | 91 | wheelSpeed1 = wheelSpeed3 = MOTOR_SCALE; |
Hypna | 12:edcae0f36e9c | 92 | wheelSpeed2 = wheelSpeed4 = (1.0 - error)*MOTOR_SCALE; |
Hypna | 5:f53f06a866e9 | 93 | } |
Hypna | 5:f53f06a866e9 | 94 | |
Hypna | 9:01c17b286a99 | 95 | atLine = false; |
Hypna | 5:f53f06a866e9 | 96 | } |
Hypna | 6:83c1f8d6a65a | 97 | } while(!intersection() || atLine); |
Hypna | 5:f53f06a866e9 | 98 | |
Hypna | 5:f53f06a866e9 | 99 | wheelSpeed1 = wheelSpeed2 = wheelSpeed3 = wheelSpeed4 = 0; |
Hypna | 5:f53f06a866e9 | 100 | } |
Hypna | 5:f53f06a866e9 | 101 | |
Hypna | 12:edcae0f36e9c | 102 | double DriveController::calculateError() |
Hypna | 5:f53f06a866e9 | 103 | { |
Hypna | 12:edcae0f36e9c | 104 | double error; |
Hypna | 5:f53f06a866e9 | 105 | int bin = 0; |
Hypna | 5:f53f06a866e9 | 106 | |
Hypna | 5:f53f06a866e9 | 107 | for(int i = 7; i >= 0; i--) |
Hypna | 5:f53f06a866e9 | 108 | { |
Hypna | 6:83c1f8d6a65a | 109 | bin += sensorStates[i][1]<<(7-i); |
Hypna | 2:d0ce8e26cbc4 | 110 | } |
Hypna | 3:0d7687b6ef14 | 111 | |
Hypna | 5:f53f06a866e9 | 112 | switch(bin) |
Hypna | 5:f53f06a866e9 | 113 | { |
Hypna | 12:edcae0f36e9c | 114 | case 1: error = 6; |
Hypna | 5:f53f06a866e9 | 115 | break; |
Hypna | 12:edcae0f36e9c | 116 | case 3: error = 5; |
Hypna | 5:f53f06a866e9 | 117 | break; |
Hypna | 12:edcae0f36e9c | 118 | case 2: error = 4; |
Hypna | 5:f53f06a866e9 | 119 | break; |
Hypna | 12:edcae0f36e9c | 120 | case 6: error = 3; |
Hypna | 5:f53f06a866e9 | 121 | break; |
Hypna | 12:edcae0f36e9c | 122 | case 4: error = 2; |
Hypna | 5:f53f06a866e9 | 123 | break; |
Hypna | 12:edcae0f36e9c | 124 | case 12: error = 1; |
Hypna | 5:f53f06a866e9 | 125 | break; |
Hypna | 12:edcae0f36e9c | 126 | case 8: error = 0; |
Hypna | 5:f53f06a866e9 | 127 | break; |
Hypna | 5:f53f06a866e9 | 128 | case 24: error = 0; |
Hypna | 5:f53f06a866e9 | 129 | break; |
Hypna | 12:edcae0f36e9c | 130 | case 16: error = 0; |
Hypna | 5:f53f06a866e9 | 131 | break; |
Hypna | 12:edcae0f36e9c | 132 | case 48: error = -1; |
Hypna | 5:f53f06a866e9 | 133 | break; |
Hypna | 12:edcae0f36e9c | 134 | case 32: error = -2; |
Hypna | 5:f53f06a866e9 | 135 | break; |
Hypna | 12:edcae0f36e9c | 136 | case 96: error = -3; |
Hypna | 5:f53f06a866e9 | 137 | break; |
Hypna | 12:edcae0f36e9c | 138 | case 64: error = -4; |
Hypna | 5:f53f06a866e9 | 139 | break; |
Hypna | 12:edcae0f36e9c | 140 | case 192: error = -5; |
Hypna | 5:f53f06a866e9 | 141 | break; |
Hypna | 12:edcae0f36e9c | 142 | case 128: error = -6; |
Hypna | 10:210c8f1e3a92 | 143 | break; |
Hypna | 10:210c8f1e3a92 | 144 | default: error = 0; |
Hypna | 5:f53f06a866e9 | 145 | } |
Hypna | 5:f53f06a866e9 | 146 | |
Hypna | 12:edcae0f36e9c | 147 | return error*CORRECTION_SCALE; |
Hypna | 2:d0ce8e26cbc4 | 148 | } |
Hypna | 2:d0ce8e26cbc4 | 149 | |
Hypna | 4:ac6b2e5b240b | 150 | bool DriveController::intersection() |
Hypna | 2:d0ce8e26cbc4 | 151 | { |
Hypna | 6:83c1f8d6a65a | 152 | |
Hypna | 6:83c1f8d6a65a | 153 | // add speed bump check later |
Hypna | 6:83c1f8d6a65a | 154 | |
Hypna | 5:f53f06a866e9 | 155 | return (sensorStates[0][1]&&sensorStates[1][1]&&sensorStates[2][1]&&sensorStates[3][1]) |
Hypna | 5:f53f06a866e9 | 156 | || (sensorStates[4][1]&&sensorStates[5][1]&&sensorStates[6][1]&&sensorStates[7][1]); |
Hypna | 2:d0ce8e26cbc4 | 157 | } |
Hypna | 1:fa6eb0c33b2f | 158 | |
Hypna | 5:f53f06a866e9 | 159 | void DriveController::rotate(char direction) |
Hypna | 2:d0ce8e26cbc4 | 160 | { |
Hypna | 6:83c1f8d6a65a | 161 | bool atLine = true; |
Hypna | 2:d0ce8e26cbc4 | 162 | |
Hypna | 6:83c1f8d6a65a | 163 | if(direction == 'L') |
Hypna | 6:83c1f8d6a65a | 164 | { |
Hypna | 6:83c1f8d6a65a | 165 | wheelDirection1 = wheelDirection3 = 0; |
Hypna | 6:83c1f8d6a65a | 166 | wheelDirection2 = wheelDirection4 = 1; |
Hypna | 6:83c1f8d6a65a | 167 | } |
Hypna | 6:83c1f8d6a65a | 168 | else |
Hypna | 6:83c1f8d6a65a | 169 | { |
Hypna | 10:210c8f1e3a92 | 170 | wheelDirection1 = wheelDirection3 = 0; |
Hypna | 10:210c8f1e3a92 | 171 | wheelDirection2 = wheelDirection4 = 1; |
Hypna | 6:83c1f8d6a65a | 172 | } |
Hypna | 6:83c1f8d6a65a | 173 | |
Hypna | 9:01c17b286a99 | 174 | wheelSpeed1 = wheelSpeed2 = wheelSpeed3 = wheelSpeed4 = MOTOR_SCALE; |
Hypna | 6:83c1f8d6a65a | 175 | |
Hypna | 12:edcae0f36e9c | 176 | /*do |
Hypna | 6:83c1f8d6a65a | 177 | { |
Hypna | 6:83c1f8d6a65a | 178 | sensors.lineDetect(sensorStates); |
Hypna | 6:83c1f8d6a65a | 179 | |
Hypna | 6:83c1f8d6a65a | 180 | if(!intersection()) |
Hypna | 6:83c1f8d6a65a | 181 | atLine = false; |
Hypna | 6:83c1f8d6a65a | 182 | |
Hypna | 12:edcae0f36e9c | 183 | } while(!intersection() || atLine);*/ |
Hypna | 12:edcae0f36e9c | 184 | |
Hypna | 12:edcae0f36e9c | 185 | wait(0.6); |
Hypna | 6:83c1f8d6a65a | 186 | |
Hypna | 6:83c1f8d6a65a | 187 | wheelSpeed1 = wheelSpeed2 = wheelSpeed3 = wheelSpeed4 = 0; |
Hypna | 2:d0ce8e26cbc4 | 188 | } |
Hypna | 2:d0ce8e26cbc4 | 189 | |
Hypna | 4:ac6b2e5b240b | 190 | void DriveController::getCommand() |
Hypna | 2:d0ce8e26cbc4 | 191 | { |
Hypna | 7:2f3e841ee0ff | 192 | bool received = false; |
Hypna | 7:2f3e841ee0ff | 193 | int status; |
Hypna | 7:2f3e841ee0ff | 194 | int msg; |
Hypna | 2:d0ce8e26cbc4 | 195 | |
Hypna | 7:2f3e841ee0ff | 196 | while(!received) |
Hypna | 7:2f3e841ee0ff | 197 | { |
Hypna | 7:2f3e841ee0ff | 198 | status = i2c.receive(); |
Hypna | 7:2f3e841ee0ff | 199 | |
Hypna | 7:2f3e841ee0ff | 200 | if(status == 2) //if status is WriteGeneral |
Hypna | 7:2f3e841ee0ff | 201 | { |
Hypna | 7:2f3e841ee0ff | 202 | msg = i2c.read(); |
Hypna | 7:2f3e841ee0ff | 203 | received = true; |
Hypna | 7:2f3e841ee0ff | 204 | } |
Hypna | 7:2f3e841ee0ff | 205 | } |
Hypna | 7:2f3e841ee0ff | 206 | |
Hypna | 8:9030d2e3a1e8 | 207 | command = msg & 7; |
Hypna | 8:9030d2e3a1e8 | 208 | edge = msg & 24; |
Hypna | 7:2f3e841ee0ff | 209 | |
Hypna | 2:d0ce8e26cbc4 | 210 | } |
Hypna | 2:d0ce8e26cbc4 | 211 | |
Hypna | 4:ac6b2e5b240b | 212 | void DriveController::sendComplete() |
Hypna | 4:ac6b2e5b240b | 213 | { |
Hypna | 7:2f3e841ee0ff | 214 | i2c.write(1); |
Hypna | 4:ac6b2e5b240b | 215 | } |
Hypna | 12:edcae0f36e9c | 216 | |
Hypna | 12:edcae0f36e9c | 217 | void DriveController::spinTest() |
Hypna | 12:edcae0f36e9c | 218 | { |
Hypna | 12:edcae0f36e9c | 219 | wheelDirection1 = wheelDirection3 = 1; |
Hypna | 12:edcae0f36e9c | 220 | wheelDirection2 = wheelDirection4 = 0; |
Hypna | 12:edcae0f36e9c | 221 | |
Hypna | 12:edcae0f36e9c | 222 | wheelSpeed1 = wheelSpeed2 = wheelSpeed3 = wheelSpeed4 = MOTOR_SCALE; |
Hypna | 12:edcae0f36e9c | 223 | |
Hypna | 12:edcae0f36e9c | 224 | while(true) |
Hypna | 12:edcae0f36e9c | 225 | wait(1); |
Hypna | 12:edcae0f36e9c | 226 | } |