File content as of revision 8:32ba0fad1689:

#include "rtos.h"
#include "PID.h"
#include "PololuQik2.h"
#include "QEI.h"
#include "mbed.h"
#include "HCSR04.h"
#include "stdio.h"
#include "LPC17xx.h"

#define PIN_TRIGGERL    (p12)
#define PIN_ECHOL       (p11)
#define PIN_TRIGGERR    (p29)
#define PIN_ECHOR       (p30)
#define PULSE_PER_REV  (1192)
#define WHEEL_CIRCUM   (12.56637)
#define DIST_PER_PULSE (0.01054225722682)
#define MTRS_TO_INCH   (39.3701)
#define MAX_SPEED      (0.3*127)
#define PPR            (4331/4)
#define LEFT           (1)
#define RIGHT          (0)
#define FORWARD        (1)
#define BACKWARD       (0)
#define TOOLS          (0)
#define MID            (1)
#define FIRST_WAVE     (0)
#define FAR            (1)


float range, pid_return, usValue;
void errFunction(void);
bool cRc;

//Hardware Initialization
Serial bt(p13,p14);
Serial pc(USBTX,USBRX);
HCSR04 rangeFinderLeft( PIN_TRIGGERL, PIN_ECHOL );
HCSR04 rangeFinderRight( PIN_TRIGGERR, PIN_ECHOR );
PID pid1(15.0,0.0,4.0,0.02);
PololuQik2 motors(p9, p10, p8, p15, errFunction, cRc);
QEI rightEncoder(p17,p18,NC,PPR,QEI::X4_ENCODING);
QEI leftEncoder(p16,p15,NC,PPR,QEI::X4_ENCODING);
//InterruptIn encoder(p29);


//Functions

float wall_follow(int side, int direction, int section);
void wall_follow2(int side, int direction, int section, float location);
void wall_follow3(int &currentLocation, int &WaveOpening);
void leftTurn(void);
void rightTurn(void);
void us_distance(int side);
void tools_section(float* location, float &current);
void mid_section(float* location, float &current, int* direction);
void mid_section2(float* location, float &current, int* direction);
void rig_section(float* location, float &current, int* direction, int rig);
void overBump(int wave);
void alignWithWall(int section);
void alignParallel(int side, int turn, float limit);

//Variables

int main(void)
{
    float location[3], current=0;
    int direction[3];

    pc.baud(115200);
    bt.baud(115200);
    motors.begin();

    bt.printf("START\r\n");
    //Go to tools
    tools_section(location, current);
    mid_section(location, current, direction);
    mid_section2(location, current, direction);



}

void errFunction(void)
{
    //Nothing
}

void us_distance(int side)
{
    if(side == LEFT) {
        rangeFinderLeft.startMeas();
        wait_us(20);
        rangeFinderLeft.getMeas(range);
    } else {

        rangeFinderRight.startMeas();
        wait_us(20);
        rangeFinderRight.getMeas(range);
    }

}

void alignParallel(int side, int turn, float limit)
{
    leftEncoder.reset();
    rightEncoder.reset();

    if(turn == LEFT) {
        motors.setMotor0Speed(MAX_SPEED); //right
        motors.setMotor1Speed(-MAX_SPEED); //left
        while(rightEncoder.getPulses() < 100);

        motors.stopBothMotors();

        motors.setMotor0Speed(0.7*MAX_SPEED); //right
        motors.setMotor1Speed(-0.7*MAX_SPEED); //left
    } else {
        motors.setMotor0Speed(-MAX_SPEED); //right
        motors.setMotor1Speed(MAX_SPEED); //left
        while(leftEncoder.getPulses() < 100);

        motors.stopBothMotors();

        motors.setMotor0Speed(-0.7*MAX_SPEED); //right
        motors.setMotor1Speed(0.7*MAX_SPEED); //left
    }
    
    usValue = 0;
    
    if(side == LEFT) {
        while(1) {
            us_distance(LEFT);
            //bt.printf("Range %f \t OldValue %f\n\r",range, usValue);
            if(range > usValue && usValue != 0 && range < limit) {
                break;
            } else {
                usValue = range;
            }
        }
    } else {
        while(1) {
            us_distance(RIGHT);
            //bt.printf("Range %f \t OldValue %f\n\r",range, usValue);
            if(range > usValue && usValue != 0 && range < limit) {
                break;
            } else {
                usValue = range;
            }
        }
    }
    motors.stopBothMotors();
}

float wall_follow(int side, int direction, int section)
{
    float location, wavegap=0, set=4;
    int dir=1;

    pid1.reset();

    if(direction == BACKWARD) dir=-1;
    if(section == TOOLS)set= 10;

    leftEncoder.reset();
    rightEncoder.reset();

    location=(abs(leftEncoder.getPulses()*11.12/PPR) + abs(rightEncoder.getPulses()*11.12/PPR))/2;

    while(location< 78) {
        location=(abs(leftEncoder.getPulses()*11.12/PPR) + abs(rightEncoder.getPulses()*11.12/PPR))/2;

        pid1.setInputLimits(0, set);
        pid1.setOutputLimits( -MAX_SPEED, MAX_SPEED);
        pid1.setSetPoint(set);
        if(side) {
            us_distance(LEFT);
        } else {
            us_distance(RIGHT);
        }

        if(range > 20) {
            wavegap=(abs(leftEncoder.getPulses()*11.12/PPR) + abs(rightEncoder.getPulses()*11.12/PPR))/2;
            //bt.printf("wavegap %f\r\n",wavegap);
            // AT WAVE OPENING!!!!
            motors.setMotor1Speed(dir*0.3*127);//left
            motors.setMotor0Speed(dir*0.3*127);//right
        } else {

            pid1.setProcessValue(range);
            pid_return = pid1.compute();

            if(pid_return > 0) {
                if(side) {
                    motors.setMotor0Speed(dir*MAX_SPEED - dir*pid_return);//right
                    motors.setMotor1Speed(dir*MAX_SPEED);//left
                } else {
                    motors.setMotor1Speed(dir*MAX_SPEED - dir*pid_return);//left
                    motors.setMotor0Speed(dir*MAX_SPEED);//right
                }
            } else if(pid_return < 0) {
                if(side) {
                    motors.setMotor0Speed(dir*MAX_SPEED);//right
                    motors.setMotor1Speed(dir*MAX_SPEED + dir*pid_return);//left
                } else {
                    motors.setMotor1Speed(dir*MAX_SPEED);//left
                    motors.setMotor0Speed(dir*MAX_SPEED + dir*pid_return);//right
                }
            } else {
                motors.setMotor0Speed(dir*MAX_SPEED);//right
                motors.setMotor1Speed(dir*MAX_SPEED);//left
            }
        }
    }
    return wavegap;
}

/* MODIFIED WALL_FOLLOW FOR NAVIGATION */

void wall_follow2(int side, int direction, int section, float location)
{
    int SeeWaveGap = false, dir=1;
    float set=4, loc=0;

    pid1.reset();

    if(direction == BACKWARD) dir=-1;
    if(section == TOOLS)set= 5;

    leftEncoder.reset();
    rightEncoder.reset();

    while(loc + location < 80) {
        loc=(abs(leftEncoder.getPulses()*11.12/PPR) + abs(rightEncoder.getPulses()*11.12/PPR))/2;

        pid1.setInputLimits(0.0, set);
        pid1.setOutputLimits( -MAX_SPEED, MAX_SPEED);
        pid1.setSetPoint(set);

        if(side) {
            us_distance(LEFT);
        } else {
            us_distance(RIGHT);
        }


        /*************CHECK FOR WAVE OPENING*****************/
        /* If after 20 ms the ultrasonic still sees 20+ cm */
        /*      then robot is at wave opening               */

        pc.printf("range %f\r\n",range);
        if(range > 20) {
            motors.stopBothMotors();
            bt.printf("wavegap\r\n");
            // AT WAVE OPENING!!!!
            break;
        }

        pid1.setProcessValue(range);
        pid_return = pid1.compute();
        //bt.printf("Range: %f\n      PID:   %f\r\n", range, pid_return);

        if(pid_return > 0) {
            if(side) {
                motors.setMotor0Speed(dir*MAX_SPEED - dir*pid_return);//right
                motors.setMotor1Speed(dir*MAX_SPEED);//left
            } else {
                motors.setMotor1Speed(dir*MAX_SPEED - dir*pid_return);//left
                motors.setMotor0Speed(dir*MAX_SPEED);//right
            }
        } else if(pid_return < 0) {
            if(side) {
                motors.setMotor0Speed(dir*MAX_SPEED);//right
                motors.setMotor1Speed(dir*MAX_SPEED + dir*pid_return);//left
            } else {
                motors.setMotor1Speed(dir*MAX_SPEED);//left
                motors.setMotor0Speed(dir*MAX_SPEED + dir*pid_return);//right
            }
        } else {
            motors.setMotor0Speed(dir*MAX_SPEED);
            motors.setMotor1Speed(dir*MAX_SPEED);
        }
    }
    motors.stopBothMotors();
}


void alignWithWall(int section)
{
    usValue = 0;

    if(section == TOOLS) {
        // turn at an angle
        leftEncoder.reset();
        rightEncoder.reset();
        motors.setMotor0Speed(-MAX_SPEED); //right
        motors.setMotor1Speed(0.4*MAX_SPEED); //left
        while(rightEncoder.getPulses()>-1000);
        motors.stopBothMotors();

        //go backwards toward wall
        leftEncoder.reset();
        rightEncoder.reset();
        motors.setMotor0Speed(-MAX_SPEED); //right
        motors.setMotor1Speed(-MAX_SPEED); //left
        while(abs(leftEncoder.getPulses()) < 300 || abs(rightEncoder.getPulses()) < 300);

        motors.stopBothMotors();

        // turn left towards wall
        alignParallel(LEFT,LEFT,100);
    } else {
        // turn right towards wall
        alignParallel(LEFT,RIGHT, 60);    
    }
}

void rightTurn(void)
{
    leftEncoder.reset();
    rightEncoder.reset();
    motors.setMotor0Speed(-0.4*127);//right
    motors.setMotor1Speed(0.4*127);//left
    while(leftEncoder.getPulses()<1000 || rightEncoder.getPulses()>-1000);
    motors.stopBothMotors();
}

void leftTurn(void)
{
    leftEncoder.reset();
    rightEncoder.reset();
    motors.setMotor0Speed(0.4*127);// right
    motors.setMotor1Speed(-0.4*127);// left
    while(abs(leftEncoder.getPulses())<1075 || rightEncoder.getPulses()<1075);
    motors.stopBothMotors();
}


void overBump(int wave)
{
    int preLeft=5000, preRight=5000 ;

    leftEncoder.reset();
    rightEncoder.reset();
    motors.setMotor0Speed(0.15*127); //right
    motors.setMotor1Speed(0.15*127); //left
    while((abs(leftEncoder.getPulses()) < 700 || abs(rightEncoder.getPulses())< 700) && preLeft!=0) {
        preLeft=leftEncoder.getPulses();
        preRight=rightEncoder.getPulses();
        wait_ms(20);
        if(leftEncoder.getPulses() == preLeft && rightEncoder.getPulses()== preRight) preLeft=preRight=0;
    }

    if(wave == FAR) {
        while(leftEncoder.getPulses() != preLeft && rightEncoder.getPulses()!= preRight) {
            preLeft=leftEncoder.getPulses();
            preRight=rightEncoder.getPulses();
            wait_ms(20);
        }

        motors.stopBothMotors();
    }

    leftEncoder.reset();
    rightEncoder.reset();
    motors.setMotor0Speed(0.4*127); //right
    motors.setMotor1Speed(0.4*127); //left
    while(abs(leftEncoder.getPulses()) < 200 || abs(rightEncoder.getPulses()) < 200);

    motors.stopBothMotors();
}

void tools_section(float* location, float &current)
{

    wall_follow(LEFT,FORWARD, TOOLS);
    // current position in reference to the starting position
    current=(abs(leftEncoder.getPulses()*11.12/PPR) + abs(rightEncoder.getPulses()*11.12/PPR))/2;
    bt.printf("current %f \r\n",current);

    motors.stopBothMotors();

    //Tool aquiring
    wait(2);
    // After tool is aquired

    alignWithWall(TOOLS);
    current-=8;
    wait_ms(100);

    us_distance(LEFT);
    
    if(range < 20) {
        wall_follow2(LEFT,BACKWARD,TOOLS, current);
        location[0]= current- ((abs(leftEncoder.getPulses()*11.12/PPR) + abs(rightEncoder.getPulses()*11.12/PPR))/2);
        current= location[0];

        /*      // go backwards
              leftEncoder.reset();
              rightEncoder.reset();
              motors.setMotor0Speed(-0.3*127); //right
              motors.setMotor1Speed(-0.3*127); //left
              while(abs(leftEncoder.getPulses()) < 150 || abs(rightEncoder.getPulses()) < 150);

              motors.stopBothMotors();
              */

        leftTurn();
        overBump(FAR);
    } else {
        location[0]= 77;
        leftTurn();
        wait_ms(20);
        overBump(FIRST_WAVE);
    }

    bt.printf("wavegap = %f\r\n",location[0]);
}

void mid_section(float* location, float &current, int* direction)
{

    motors.begin();
    alignWithWall(MID);
    /*
       leftEncoder.reset();
       rightEncoder.reset();
       motors.setMotor0Speed(MAX_SPEED); //right
       motors.setMotor1Speed(MAX_SPEED); //left
       while(abs(leftEncoder.getPulses())<75 || abs(rightEncoder.getPulses())<75);
       motors.stopBothMotors();
       */
    bt.printf("mid section current = %f\r\n",current);
    wall_follow2(LEFT,FORWARD,MID, current);
    current=((abs(leftEncoder.getPulses()*11.12/PPR) + abs(rightEncoder.getPulses()*11.12/PPR))/2);
    bt.printf("after wf2 current = %f\r\n",current);

    if(current != 0) {
        direction[0]= RIGHT;
        current+= location[0];
        location[1]= current;
    } else {
        current=location[0];
        direction[0]= LEFT;
        wall_follow2(LEFT,BACKWARD,MID,current);
        location[1]= location[0]- ((abs(leftEncoder.getPulses()*11.12/PPR) + abs(rightEncoder.getPulses()*11.12/PPR))/2);
    }

    bt.printf("wavegap2 = %f\r\n",location[1]);
    leftTurn();
    overBump(FAR);
    // go forward
    leftEncoder.reset();
    rightEncoder.reset();
    motors.setMotor0Speed(0.2*127); //right
    motors.setMotor1Speed(0.2*127); //left
    while(abs(leftEncoder.getPulses())<300 || abs(rightEncoder.getPulses())<300);
    motors.stopBothMotors();

}

void mid_section2(float* location, float &current, int* direction)
{

    motors.begin();
    rightTurn();
    alignWithWall(MID);
    wall_follow2(LEFT,FORWARD,MID, current);
    current=((abs(leftEncoder.getPulses()*11.12/PPR) + abs(rightEncoder.getPulses()*11.12/PPR))/2);

    if(current != 0) {
        direction[1]= RIGHT;
        current+= location[1];
        location[2]= current;
    } else {
        current=location[1];
        direction[1]= LEFT;
        wall_follow2(LEFT,BACKWARD,MID,current);
        location[2]= location[1]- ((abs(leftEncoder.getPulses()*11.12/PPR) + abs(rightEncoder.getPulses()*11.12/PPR))/2);
    }

    leftTurn();
    overBump(FAR);
}

void rig_section(float* location, float &current, int* direction, int rig)
{


}