Bayley Wang / Mbed 2 deprecated foc-ed_in_the_bot_compact

robot

Dependencies:   FastPWM3 mbed

main.cpp@185:5c102874b490, 2018-02-09 (annotated)

Committer:
bwang
Date:
Fri Feb 09 22:19:52 2018 +0000
Revision:
185:5c102874b490
Parent:
184:633119bb0b77
Child:
186:c18db1e31da6
moved all the hard-coded values to defaults.h

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bwang 0:bac9c3a3a6ca 1 #include "mbed.h"
bwang 0:bac9c3a3a6ca 2 #include "math.h"
bwang 19:a6cf15f89f3d 3
bwang 0:bac9c3a3a6ca 4 #include "PositionSensor.h"
bwang 0:bac9c3a3a6ca 5 #include "FastPWM.h"
bwang 18:3863ca45cf26 6 #include "PwmIn.h"
bwang 19:a6cf15f89f3d 7 #include "MathHelpers.h"
bwang 42:030e0ec4eac5 8 #include "Transforms.h"
bwang 42:030e0ec4eac5 9 #include "DQMapper.h"
bwang 42:030e0ec4eac5 10 #include "ThrottleMapper.h"
bwang 118:2b6dab10b69d 11 #include "Calibration.h"
bwang 150:08c13bfc7417 12 #include "Filter.h"
bwang 42:030e0ec4eac5 13
bwang 42:030e0ec4eac5 14 #include "BREMSStructs.h"
bwang 42:030e0ec4eac5 15 #include "BREMSConfig.h"
bwang 30:c25c5bf0d951 16
bwang 184:633119bb0b77 17 #include "layout.h"
bwang 185:5c102874b490 18 #include "defaults.h"
bwang 185:5c102874b490 19 #include "derived.h"
bwang 185:5c102874b490 20
bwang 185:5c102874b490 21 /*
bwang 15:b583cd30b063 22 #include "config_motor.h"
bwang 15:b583cd30b063 23 #include "config_loop.h"
bwang 15:b583cd30b063 24 #include "config_inverter.h"
bwang 29:50e6e4e46580 25 #include "config_driving.h"
bwang 72:5f1da97d62e1 26 #include "config_logging.h"
bwang 185:5c102874b490 27 */
bwang 0:bac9c3a3a6ca 28
bwang 42:030e0ec4eac5 29 #include "main.h"
bwang 0:bac9c3a3a6ca 30
bwang 42:030e0ec4eac5 31 IOStruct io;
bwang 42:030e0ec4eac5 32 ReadDataStruct read;
bwang 42:030e0ec4eac5 33 FOCStruct foc;
bwang 42:030e0ec4eac5 34 ControlStruct control;
bwang 2:eabe8feaaabb 35
bwang 42:030e0ec4eac5 36 DQMapper *dq;
bwang 42:030e0ec4eac5 37 ThrottleMapper *th;
bwang 2:eabe8feaaabb 38
bwang 44:3fd6a43b91f0 39 int loop_counter = 0;
bwang 25:3f2b585ae72d 40 bool control_enabled = false;
dicarloj 13:41d102a53caf 41
bwang 42:030e0ec4eac5 42 void update_velocity() {
bwang 42:030e0ec4eac5 43 read.last_p_mech = read.p_mech;
bwang 42:030e0ec4eac5 44 read.p_mech = io.pos->GetMechPosition();
bwang 44:3fd6a43b91f0 45
bwang 42:030e0ec4eac5 46 float dp_mech = read.p_mech - read.last_p_mech;
bwang 42:030e0ec4eac5 47 if (dp_mech < -PI) dp_mech += 2 * PI;
bwang 42:030e0ec4eac5 48 if (dp_mech > PI) dp_mech -= 2 * PI;
bwang 44:3fd6a43b91f0 49
bwang 42:030e0ec4eac5 50 float w_raw = dp_mech * F_SW; //rad/s
bwang 44:3fd6a43b91f0 51
bwang 154:0a22dcf91577 52 read.w = control.velocity_filter->update(w_raw);
bwang 42:030e0ec4eac5 53 }
bwang 2:eabe8feaaabb 54
bwang 118:2b6dab10b69d 55 void commutate() {
bwang 56:c681001dfa46 56 /*safety checks, do we do anything this cycle?*/
bwang 56:c681001dfa46 57 if (!control_enabled && io.throttle_in->get_enabled() && io.pos->IsValid() && is_driving()) {
bwang 52:fd3d8df99287 58 go_enabled();
bwang 52:fd3d8df99287 59 }
bwang 42:030e0ec4eac5 60
bwang 42:030e0ec4eac5 61 /*update velocity, references*/
bwang 42:030e0ec4eac5 62 update_velocity();
bwang 44:3fd6a43b91f0 63 if (loop_counter % SLOW_LOOP_COUNTER == 0) {
bwang 44:3fd6a43b91f0 64 loop_counter = 0;
bwang 44:3fd6a43b91f0 65 slow_loop();
bwang 44:3fd6a43b91f0 66 }
bwang 44:3fd6a43b91f0 67 loop_counter++;
bwang 42:030e0ec4eac5 68
bwang 42:030e0ec4eac5 69 /*update position, sin, cos*/
bwang 130:639cd8586f86 70 foc.p = io.pos->GetElecPosition() - POS_OFFSET;
bwang 42:030e0ec4eac5 71 float sin_p = sinf(foc.p);
bwang 42:030e0ec4eac5 72 float cos_p = cosf(foc.p);
bwang 42:030e0ec4eac5 73
bwang 49:da8604278d76 74 /*scale and offset currents (adval1, 2 are updated in ISR)*/
bwang 42:030e0ec4eac5 75 foc.ia = ((float) read.adval1 / 4096.0f * AVDD - I_OFFSET - read.ia_supp_offset) / I_SCALE;
bwang 42:030e0ec4eac5 76 foc.ib = ((float) read.adval2 / 4096.0f * AVDD - I_OFFSET - read.ib_supp_offset) / I_SCALE;
bwang 42:030e0ec4eac5 77
bwang 42:030e0ec4eac5 78 /*compute d, q*/
bwang 42:030e0ec4eac5 79 clarke(foc.ia, foc.ib, &foc.alpha, &foc.beta);
bwang 42:030e0ec4eac5 80 park(foc.alpha, foc.beta, sin_p, cos_p, &foc.d, &foc.q);
bwang 42:030e0ec4eac5 81
bwang 42:030e0ec4eac5 82 /*PI controller*/
bwang 44:3fd6a43b91f0 83 control.d_filtered = update_filter(control.d_filtered, foc.d, DQ_FILTER_STRENGTH);
bwang 44:3fd6a43b91f0 84 control.q_filtered = update_filter(control.q_filtered, foc.q, DQ_FILTER_STRENGTH);
bwang 42:030e0ec4eac5 85
bwang 42:030e0ec4eac5 86 float d_err = control.d_ref - control.d_filtered;
bwang 42:030e0ec4eac5 87 float q_err = control.q_ref - control.q_filtered;
bwang 42:030e0ec4eac5 88
bwang 58:7316c5a4c417 89 control.d_integral += d_err * KI_D;
bwang 58:7316c5a4c417 90 control.q_integral += q_err * KI_Q;
bwang 42:030e0ec4eac5 91
bwang 131:031df63c7dbc 92 constrain_norm(&control.d_integral, &control.q_integral, 1.0f, 1.0f, INTEGRAL_MAX);
bwang 131:031df63c7dbc 93
bwang 131:031df63c7dbc 94 foc.vd_decouple = -Lq * POLE_PAIRS * read.w * foc.q / BUS_VOLTAGE / 2.0f;
bwang 131:031df63c7dbc 95 foc.vq_decouple = Ld * POLE_PAIRS * read.w * foc.d / BUS_VOLTAGE / 2.0f;
bwang 42:030e0ec4eac5 96
bwang 158:882f9c208378 97 constrain_norm(&foc.vd_decouple, &foc.vq_decouple, 1.0f, 1.0f, 1.0f);
bwang 131:031df63c7dbc 98
bwang 131:031df63c7dbc 99 foc.vd = KP_D * d_err + control.d_integral;// + foc.vd_decouple;
bwang 131:031df63c7dbc 100 foc.vq = KP_Q * q_err + control.q_integral;// + foc.vq_decouple;
bwang 42:030e0ec4eac5 101
bwang 158:882f9c208378 102 constrain_norm(&foc.vd, &foc.vq, 1.0f, 1.0f, 1.0f + OVERMODULATION_FACTOR);
bwang 42:030e0ec4eac5 103
bwang 42:030e0ec4eac5 104 if (!control_enabled) {
bwang 42:030e0ec4eac5 105 foc.vd = 0.0f;
bwang 42:030e0ec4eac5 106 foc.vq = 0.0f;
bwang 42:030e0ec4eac5 107 }
bwang 42:030e0ec4eac5 108
bwang 126:498f56ba051e 109 float pv = foc.p + read.w / V_PHASE_SWIZZLE;
bwang 124:e70ca81676fc 110 float sin_pv = sinf(pv);
bwang 124:e70ca81676fc 111 float cos_pv = cosf(pv);
bwang 124:e70ca81676fc 112
bwang 42:030e0ec4eac5 113 /*inverse transforms*/
bwang 124:e70ca81676fc 114 invpark(foc.vd, foc.vq, sin_pv, cos_pv, &foc.valpha, &foc.vbeta);
bwang 42:030e0ec4eac5 115
bwang 42:030e0ec4eac5 116 float va, vb, vc, voff;
bwang 42:030e0ec4eac5 117
bwang 42:030e0ec4eac5 118 invclarke(foc.valpha, foc.vbeta, &va, &vb);
bwang 42:030e0ec4eac5 119 vc = -va - vb;
bwang 42:030e0ec4eac5 120
bwang 42:030e0ec4eac5 121 /*SVPWM*/
bwang 44:3fd6a43b91f0 122 voff = (fminf(va, fminf(vb, vc)) + fmaxf(va, fmaxf(vb, vc)))/2.0f;//don't think about it
bwang 42:030e0ec4eac5 123 va = va - voff;
bwang 42:030e0ec4eac5 124 vb = vb - voff;
bwang 42:030e0ec4eac5 125 vc = vc - voff;
bwang 42:030e0ec4eac5 126
bwang 56:c681001dfa46 127 /*safety checks, reset integral*/
bwang 56:c681001dfa46 128 if (!io.throttle_in->get_enabled() || !io.pos->IsValid() || !is_driving()) {
bwang 56:c681001dfa46 129 /*do this even in disabled state, to keep integral down*/
bwang 56:c681001dfa46 130 go_disabled();
bwang 56:c681001dfa46 131 }
bwang 56:c681001dfa46 132
bwang 42:030e0ec4eac5 133 /*output to timers*/
bwang 157:a9b2002994d5 134 set_dtc(io.a, 0.5f + 0.5f * va * LINEAR_MODULATION_MAX);
bwang 157:a9b2002994d5 135 set_dtc(io.b, 0.5f + 0.5f * vb * LINEAR_MODULATION_MAX);
bwang 157:a9b2002994d5 136 set_dtc(io.c, 0.5f + 0.5f * vc * LINEAR_MODULATION_MAX);
bwang 180:a783a972a867 137
bwang 180:a783a972a867 138 /*log data*/
bwang 180:a783a972a867 139 if (ENABLE_LOGGING) log();
bwang 42:030e0ec4eac5 140 }
bwang 42:030e0ec4eac5 141
bwang 44:3fd6a43b91f0 142 void slow_loop() {
bwang 74:f10cb573d7ca 143 float x = io.throttle_in->get_throttle();
bwang 154:0a22dcf91577 144 x = control.throttle_filter->update(x);
bwang 152:6877dceec871 145 control.torque_percent = th->map(x, read.w);
bwang 70:5e39beeb4a21 146 dq->map(control.torque_percent, read.w, &control.d_ref, &control.q_ref);
bwang 44:3fd6a43b91f0 147 }
bwang 44:3fd6a43b91f0 148
bwang 42:030e0ec4eac5 149 void go_enabled() {
bwang 42:030e0ec4eac5 150 control_enabled = true;
bwang 42:030e0ec4eac5 151 io.en->write(1);
bwang 42:030e0ec4eac5 152 }
bwang 42:030e0ec4eac5 153
bwang 42:030e0ec4eac5 154 void go_disabled() {
bwang 52:fd3d8df99287 155 control.d_integral = 0.0f;
bwang 52:fd3d8df99287 156 control.q_integral = 0.0f;
bwang 42:030e0ec4eac5 157 control_enabled = false;
bwang 42:030e0ec4eac5 158 io.en->write(0);
bwang 42:030e0ec4eac5 159 }
bwang 42:030e0ec4eac5 160
bwang 52:fd3d8df99287 161 bool is_driving() {
bwang 154:0a22dcf91577 162 return control.torque_percent > 0.01f || fabsf(read.w) > W_SAFE;
bwang 52:fd3d8df99287 163 }
bwang 52:fd3d8df99287 164
bwang 72:5f1da97d62e1 165 void log() {
bwang 180:a783a972a867 166 float packet[8];
bwang 180:a783a972a867 167 packet[0] = read.w / 8.0f;
bwang 180:a783a972a867 168 packet[1] = control.d_ref / 2.0f + 128.0f;
bwang 180:a783a972a867 169 packet[2] = control.d_filtered / 2.0f + 128.0f;
bwang 180:a783a972a867 170 packet[3] = control.q_ref / 2.0f + 128.0f;
bwang 180:a783a972a867 171 packet[4] = control.q_filtered / 2.0f + 128.0f;
bwang 180:a783a972a867 172 packet[5] = 255.0f * control.torque_percent;
bwang 180:a783a972a867 173 packet[6] = 255.0f / (1.0f + OVERMODULATION_FACTOR) * foc.vd / 2.0f + 128.0f;
bwang 180:a783a972a867 174 packet[7] = 255.0f / (1.0f + OVERMODULATION_FACTOR) * foc.vq / 2.0f + 128.0f;
bwang 180:a783a972a867 175 io.logger->log(packet);
bwang 70:5e39beeb4a21 176 }
bwang 70:5e39beeb4a21 177
bwang 1:7b61790f6be9 178 extern "C" void TIM1_UP_TIM10_IRQHandler(void) {
bwang 75:591556ce033d 179 int start_state = io.throttle_in->state();
bwang 91:f58472ac3fae 180
bwang 1:7b61790f6be9 181 if (TIM1->SR & TIM_SR_UIF ) {
bwang 4:a6669248ce4d 182 ADC1->CR2 |= 0x40000000;
bwang 91:f58472ac3fae 183 volatile int delay;
bwang 91:f58472ac3fae 184 for (delay = 0; delay < 35; delay++);
bwang 91:f58472ac3fae 185
bwang 42:030e0ec4eac5 186 read.adval1 = ADC1->DR;
bwang 42:030e0ec4eac5 187 read.adval2 = ADC2->DR;
bwang 91:f58472ac3fae 188
bwang 4:a6669248ce4d 189 commutate();
bwang 1:7b61790f6be9 190 }
bwang 1:7b61790f6be9 191 TIM1->SR = 0x00;
bwang 75:591556ce033d 192 int end_state = io.throttle_in->state();
bwang 75:591556ce033d 193 if (start_state != end_state) io.throttle_in->block();
bwang 1:7b61790f6be9 194 }
bwang 1:7b61790f6be9 195
bwang 166:4637785ba01e 196 int main() {
bwang 172:3d7196b71afd 197 dq = new InterpolatingLutMapper();
bwang 174:3872516b0d04 198 th = new LimitingThrottleMapper(1500.0f);
bwang 180:a783a972a867 199
bwang 47:1c9868e226d0 200 BREMSInit(&io, &read, &foc, &control, false);
bwang 181:d3510c8beab6 201 io.pc->attach(rxCallback);
bwang 48:a1a09c83d42c 202
bwang 0:bac9c3a3a6ca 203 for (;;) {
bwang 180:a783a972a867 204 io.logger->flush();
bwang 0:bac9c3a3a6ca 205 }
bwang 42:030e0ec4eac5 206 }