Working file for communication with ROS
Dependencies: QEI2 PID VL53L1X_Filter
wheelchair.cpp
- Committer:
- jvfausto
- Date:
- 2018-08-28
- Revision:
- 17:7f3b69300bb6
- Parent:
- 14:9caca9fde9b0
- Child:
- 18:663b6d693252
File content as of revision 17:7f3b69300bb6:
#include "wheelchair.h" Serial qei(D1, D0); bool manual_drive = false; volatile float north; //volatile double curr_yaw; double curr_yaw; double encoder_distance; char myString[64]; double Setpoint, Output, Input; double pid_yaw, Distance, Setpoint2; PID myPID(&pid_yaw, &Output, &Setpoint, 5.5, .00, 0.0036, P_ON_E, DIRECT); PID myPIDDistance(&encoder_distance, &Output, &Setpoint2, 5.5, .00, 0.0036, P_ON_E, DIRECT); //QEI wheel_right(D0, D1, NC, 450); void Wheelchair::compass_thread() { curr_yaw = imu->yaw(); north = boxcar(imu->angle_north()); } void Wheelchair::distance_thread() { /* int i; qei.putc('h'); //qei.gets(myString, 10); ti->reset(); for (i=0; myString[i-1] != '\n'; i++) { while (true) { //pc.printf("%f\r\n", ti.read()); if (ti->read() > .02) break; if (qei.readable()) { myString[i]= qei.getc(); break; } } } myString[i-1] = 0; encoder_distance = atof(myString); //out->printf("displacement = %f\r\n", encoder_distance); for(i = 0; i < 64; i++) { myString[i] = 0; } */ } Wheelchair::Wheelchair(PinName xPin, PinName yPin, Serial* pc, Timer* time ) { x = new PwmOut(xPin); y = new PwmOut(yPin); imu = new chair_BNO055(pc, time); //imu = new chair_MPU9250(pc, time); Wheelchair::stop(); imu->setup(); out = pc; out->printf("wheelchair setup done \r\n"); ti = time; wheel = new QEI(Encoder1, Encoder2, NC, EncoderReadRate); myPID.SetMode(AUTOMATIC); } /* * joystick has analog out of 200-700, scale values between 1.3 and 3.3 */ void Wheelchair::move(float x_coor, float y_coor) { float scaled_x = ((x_coor * 1.6f) + 1.7f)/3.3f; float scaled_y = (3.3f - (y_coor * 1.6f))/3.3f; // lowPass(scaled_x); //lowPass(scaled_y); x->write(scaled_x); y->write(scaled_y); //out->printf("yaw %f\r\r\n", imu->yaw()); } void Wheelchair::forward() { x->write(high); y->write(def+offset); // out->printf("distance %f\r\n", wheel_right.getDistance(37.5)); } void Wheelchair::backward() { x->write(low); y->write(def); } void Wheelchair::right() { x->write(def); y->write(low); } void Wheelchair::left() { x->write(def); y->write(high); } void Wheelchair::stop() { x->write(def); y->write(def); } // counter clockwise is - // clockwise is + void Wheelchair::pid_right(int deg) { bool overturn = false; out->printf("pid right\r\r\n"); x->write(def); Setpoint = curr_yaw + deg; pid_yaw = curr_yaw; if(Setpoint > 360) { // Setpoint -= 360; overturn = true; } myPID.SetTunings(5.5,0, 0.00345); myPID.SetOutputLimits(0, def-low); myPID.SetControllerDirection(REVERSE); while(pid_yaw < Setpoint - 3){//curr_yaw <= Setpoint) { if(overturn && curr_yaw < Setpoint-deg-1) { pid_yaw = curr_yaw + 360; } else pid_yaw = curr_yaw; myPID.Compute(); double tempor = Output+low; y->write(tempor); out->printf("curr_yaw %f\r\r\n", curr_yaw); out->printf("Setpoint = %f \r\n", Setpoint); wait(.05); } Wheelchair::stop(); out->printf("done \r\n"); } void Wheelchair::pid_left(int deg) { bool overturn = false; out->printf("pid Left\r\r\n"); x->write(def); Setpoint = curr_yaw - deg; pid_yaw = curr_yaw; if(Setpoint < 0) { // Setpoint += 360; overturn = true; } myPID.SetTunings(5,0, 0.004); myPID.SetOutputLimits(0,high-def); myPID.SetControllerDirection(REVERSE); while(pid_yaw > Setpoint + 3){//pid_yaw < Setpoint + 2) { myPID.Compute(); if(overturn && curr_yaw > Setpoint+deg+1) { pid_yaw = curr_yaw - 360; } else pid_yaw = curr_yaw; double tempor = Output+def; y->write(tempor); out->printf("curr_yaw %f\r\n", curr_yaw); wait(.05); } Wheelchair::stop(); } void Wheelchair::pid_turn(int deg) { if(deg > 180) { deg -= 360; } else if(deg < -180) { deg+=360; } int turnAmt = abs(deg); ti->reset(); if(deg >= 0){ Wheelchair::pid_right(turnAmt); } else { Wheelchair::pid_left(turnAmt); } } void Wheelchair::pid_foward(double mm) { qei.putc('r'); out->printf("pid foward\r\n"); double tempor; Setpoint2 = mm; // Setpoint = wheel_right.getDistance(37.5)+mm; myPIDDistance.SetTunings(5,0, 0.004); myPIDDistance.SetOutputLimits(0,high-def); myPIDDistance.SetControllerDirection(DIRECT); y->write(def); while(encoder_distance < Setpoint2-5){//pid_yaw < Setpoint + 2) { int i; qei.putc('h'); //qei.gets(myString, 10); ti->reset(); for (i=0; myString[i-1] != '\n'; i++) { while (true) { //pc.printf("%f\r\n", ti.read()); if (ti->read() > .02) break; if (qei.readable()) { myString[i]= qei.getc(); break; } } } myString[i-1] = 0; double tempor = atof(myString); out->printf("displacement = %f\r\n", tempor); if(abs(tempor - encoder_distance) < 500) { encoder_distance = tempor; out->printf("this is fine\r\n"); } for(i = 0; i < 64; i++) { myString[i] = 0; } Input = encoder_distance; out->printf("input foward %f\r\n", Input); wait(.1); myPIDDistance.Compute(); tempor = Output + def; x->write(tempor); out->printf("distance %f\r\n", encoder_distance); } } void Wheelchair::pid_reverse(double mm) { qei.putc('r'); /* double tempor; // Setpoint = wheel_right.getDistance(37.5)+mm; myPIDDistance.SetTunings(5,0, 0.004); myPIDDistance.SetOutputLimits(0,high-def); myPIDDistance.SetControllerDirection(DIRECT); y->write(def); while(Distance < Setpoint-5){//pid_yaw < Setpoint + 2) { tempor = Output + def; x->write(tempor); // out->printf("distance %f\r\n", wheel_right.getDistance(37.5)); // Distance = wheel_right.getDistance(37.5); wait(.05); } */ } double Wheelchair::turn_right(int deg) { bool overturn = false; out->printf("turning right\r\n"); double start = curr_yaw; double final = start + deg; if(final > 360) { final -= 360; overturn = true; } out->printf("start %f, final %f\r\n", start, final); double curr = -1; while(curr <= final - 30) { Wheelchair::right(); if( out->readable()) { out->printf("stopped\r\n"); Wheelchair::stop(); return; } curr = curr_yaw; if(overturn && curr > (360 - deg) ) { curr = 0; } } out->printf("done turning start %f final %f\r\n", start, final); Wheelchair::stop(); //delete me wait(5); float correction = final - curr_yaw; out->printf("final pos %f actual pos %f\r\n", final, curr_yaw); Wheelchair::turn_left(abs(correction)); Wheelchair::stop(); wait(5); out->printf("curr_yaw %f\r\n", curr_yaw); return final; } double Wheelchair::turn_left(int deg) { bool overturn = false; out->printf("turning left\r\n"); double start = curr_yaw; double final = start - deg; if(final < 0) { final += 360; overturn = true; } out->printf("start %f, final %f\r\n", start, final); double curr = 361; while(curr >= final) { Wheelchair::left(); if( out->readable()) { out->printf("stopped\r\n"); Wheelchair::stop(); return; } curr = curr_yaw; if(overturn && curr >= 0 && curr <= start ) { curr = 361; } } out->printf("done turning start %f final %f\r\n", start, final); Wheelchair::stop(); //delete me wait(2); /* float correction = final - curr_yaw; out->printf("final pos %f actual pos %f\r\n", final, curr_yaw); Wheelchair::turn_right(abs(correction)); Wheelchair::stop(); */ return final; } void Wheelchair::turn(int deg) { if(deg > 180) { deg -= 360; } else if(deg < -180) { deg+=360; } double finalpos; int turnAmt = abs(deg); //ti->reset(); /* if(deg >= 0){ finalpos = Wheelchair::turn_right(turnAmt); } else { finalpos = Wheelchair::turn_left(turnAmt); } */ wait(2); float correction = finalpos - curr_yaw; out->printf("final pos %f actual pos %f\r\n", finalpos, curr_yaw); //if(abs(correction) > turn_precision) { out->printf("correcting %f\r\n", correction); //ti->reset(); Wheelchair::turn_left(curr_yaw - finalpos); return; //} } float Wheelchair::getDistance() { return wheel->getDistance(Diameter); } void Wheelchair::resetDistance(){ wheel->reset(); }