File content as of revision 19:09c4b5249cec:

#include "mbed.h"
#include "MODSERIAL.h"
#include "encoder.h"
#define PI 3.14159265358979323

//Een pwm van 0.05 is net genoeg om de heugel te bewegen. linksom bewegen is negatief voor de encoder. getposition gaat in ticks. 
//4123 ticks is een rondje. 

//XenY
AnalogIn emgtr(PTB3);
AnalogIn emgbr(PTB2);
//Rechts is x, links is y
AnalogIn emgtl(PTB1);
AnalogIn emgbl(PTB0);
PwmOut pwm_A(PTA12); //Motor A
PwmOut pwm_B(PTA5);//Motor B
MODSERIAL pc(USBTX,USBRX);
DigitalOut motordirA(PTD3);
DigitalOut motordirB(PTD1);
Encoder motor1(PTD0,PTC9);
Encoder motor2(PTD5,PTC8);
void keep_in_range(float * in, float min, float max);


volatile bool looptimerflag;
void setlooptimerflag(void)
{
looptimerflag = true;
}

volatile bool dirflagx=true;
volatile bool dirflagy=true;

void tricheck(void)
{
dirflagx=true;
dirflagy=true;
}

int main()
{
pwm_A.period(1.0/22000.0);
pwm_B.period(1.0/22000.0);
    Ticker looptimer;
    Timeout dirtimeout;
    const float ts=0.001;
    looptimer.attach(setlooptimerflag,ts);
    float numh1,numh2,denh2,numl1,numl2,numl3,denl2,denl3;
    float xtr,ytr,y1tr,x1tr,ztr,z1tr,z2tr,yabstr,yabs1tr,yabs2tr,ktr;
    float xbr,ybr,y1br,x1br,zbr,z1br,z2br,yabsbr,yabs1br,yabs2br,kbr;
    float xtl,ytl,y1tl,x1tl,ztl,z1tl,z2tl,yabstl,yabs1tl,yabs2tl,ktl;
    float xbl,ybl,y1bl,x1bl,zbl,z1bl,z2bl,yabsbl,yabs1bl,yabs2bl,kbl;
    float zx,zy;
    float gain, xuit, kp, ki, zx1, yuit, zy1, pwmA, pwmB,rt;
    int xdir;
    int ydir;
    float vxuit, vyuit, Ap, Ad, Ad1, kd, kp, ki, Ai, Ai1, Bp, Bd, Bd1, Bi, Bi1;
    float for_A, for_B;
    int ticka, tickb, refA,refB, errA, errB,

    x1tr=0;    y1tr=0;    z1tr=0;    z2tr=0;    yabs1tr=0;    yabs2tr=0;
    x1br=0;    y1br=0;    z1br=0;    z2br=0;    yabs1br=0;    yabs2br=0;
    x1tl=0;    y1tl=0;    z1tl=0;    z2tl=0;    yabs1tl=0;    yabs2tl=0;
    x1bl=0;    y1bl=0;    z1bl=0;    z2bl=0;    yabs1bl=0;    yabs2bl=0;
    zx=0;      zy=0;      xdir=0;    ydir=0;
    kp=0;      ki=1;      zx1=0;     zy1=0;     rt=32.805/1000.0;


    //High pass, 35Hz, 1e
    numh1=0.900575535279376;
    numh2=-0.900575535279376;
    //denh1=1;
    denh2=-0.801151070558751;

    //Low pass, 2 Hz, 2e orde
    //numl1=0.391302053991682*pow(10.0,-4.0);
    //numl2=0.782604107983365*pow(10.0,-4.0);
    //numl3=0.391302053991682*pow(10.0,-4.0);
    //Low pass, 5 Hz, 2e orde.
    numl1=0.241359049041961*pow(10.0,-3.0);
    numl2=0.482718098083923*pow(10.0,-3.0);
    numl3=0.241359049041961*pow(10.0,-3.0);
    //denl1=1;
    denl2=-1.955578240315036;
    denl3=0.956543676511203;
    pc.baud(115200);

    while(1) {
        while(looptimerflag != true);{
        }
        looptimerflag = false;

//EMG lezen.
ktr=emgtr.read();
        xtr=(ktr-0.5)*2.0;
        ytr=xtr*numh1+x1tr*numh2-y1tr*denh2;
        yabstr=abs(ytr);
        ztr=yabstr*numl1+yabs1tr*numl2+yabs2tr*numl3-z1tr*denl2-z2tr*denl3;
        x1tr=xtr;        y1tr=ytr;        z2tr=z1tr;        z1tr=ztr;        yabs2tr=yabs1tr;        yabs1tr=yabstr;

kbr=emgbr.read();
        xbr=(kbr-0.5)*2.0;
        ybr=xbr*numh1+x1br*numh2-y1br*denh2;
        yabsbr=abs(ybr);
        zbr=yabsbr*numl1+yabs1br*numl2+yabs2br*numl3-z1br*denl2-z2br*denl3;
        x1br=xbr;        y1br=ybr;        z2br=z1br;        z1br=zbr;        yabs2br=yabs1br;        yabs1br=yabsbr;

ktl=emgtl.read();
        xtl=(ktl-0.5)*2.0;
        ytl=xtl*numh1+x1tl*numh2-y1tl*denh2;
        yabstl=abs(ytl);
        ztl=yabstl*numl1+yabs1tl*numl2+yabs2tl*numl3-z1tl*denl2-z2tl*denl3;
        x1tl=xtl;        y1tl=ytl;        z2tl=z1tl;        z1tl=ztl;        yabs2tl=yabs1tl;        yabs1tl=yabstl;

kbl=emgbl.read();
        xbl=(kbl-0.5)*2.0;
        ybl=xbl*numh1+x1bl*numh2-y1bl*denh2;
        yabsbl=abs(ybl);
        zbl=yabsbl*numl1+yabs1bl*numl2+yabs2bl*numl3-z1bl*denl2-z2bl*denl3;
        x1bl=xbl;        y1bl=ybl;        z2bl=z1bl;        z1bl=zbl;        yabs2bl=yabs1bl;        yabs1bl=yabsbl;

        zx=(zbr);
        zy=(zbl);
        
        //Grenzen.
        if (zx>1.0) {
            zx=0.99999;
        }
        if (zy>1.0) {
            zy=0.99999;
        }
        if (zx<0.30){
        zx=0;
        }
        if (zy<0.30){
        zy=0;
        }
        
        //Richting omdraaien met triceps. 
        if ((ztr>(zbr+0.1)) && dirflagx == true) {
            dirflagx = false;
            xdir ^= 1;
            dirtimeout.attach(tricheck,1.5);
        }
          if ((ztl>(zbl+0.1)) && dirflagy == true) {
            dirflagy = false;
            ydir ^= 1;
            dirtimeout.attach(tricheck,1.5);
        }
        
        //Motoraansturing.
        if (ydir==1)
        {
        zy=-1.0*zy;
        }
        if (xdir==1)
        {
        zx=-1.0*zx;
        }
        
        ticka=motor1.getPosition(); tickb=motor2.getPosition();
        vxuit=zx*4.0*pow(10.0,-5.0); // 4cm/s
        vyuit=zy*4.0*pow(10.0,-5.0); // 4cm/s
        xuit += ts*vxuit;
        yuiy += ts*vyuit;
        
        refA=4123.0*atan2(yuit,xuit)/(2.0*PI);
        refB=4123.0*sqrt(xuit*xuit+yuit*yuit)*(2.0*PI*rt);//nog keer omtrek
        errA=refA-ticka;
        errB=refB-tickb;

        //Controllers
        Ap=errA*kp;          Ad=(errA-Ad1)*kd/ts;        Ai=(Ai1+ts*errA)*ki;
        Ad1=Ad;           Ai1=Ai;
        for_a=Ai+Ap+Ad;
        Bp=errB*kp;          Bd=(errB-Bd1)*kd/ts;        Bi=(Bi1+ts*errB)*ki;
        Bd1=Bd;           Bi1=Bi;
        for_B=Bi+Bp+Bd;
        //x en y uit emg in meters. IK naar radialen. dan radialen naar ticks.  
        
        keep_in_range(&for_A, -1,1);
        keep_in_range(&for_B, -1,1);

        motordirA.write(xdir);
        motordirB.write(ydir);
        pwm_A.write(for_A);
        pwm_B.write(for_B);
        
        //pc.printf("Bi: %f, Tri: %f, Richting: %d \n\r",zbl*3.0,ztl*3.0,ydir);
        pc.printf(" %f\n\r",zy);
        //pc.printf("b %f t %f xu %f yu %f A %f B %f \n\r",zbl,ztl,xuit, yuit, pwmA,pwmB);
    }
}

void keep_in_range(float * in, float min, float max)
{
    *in > min ? *in < max? : *in = max: *in = min;
}