File content as of revision 5:4b462b9cb255:

#define pi 3.141593
#include "mbed.h"
#include "Motor.h"
#include "PID.h"
#include "QEI.h"
#define RATE 0.05
BusOut air(p13,p14);
DigitalOut out(p12);
Serial conn(p9,p10);
Serial pc(USBTX,USBRX);
Motor L(p21,p15,p16);
Motor R(p22,p17,p18);
PID Tp(50,40000,0,0.001);
BusOut led(LED1,LED2,LED3,LED4);
Motor ot(p23,p19,p20);
QEI sensort(p29,p30,NC,624);
Timeout ai;
char read;
int Rs = 0,Ls = 0;
int i = 0;
void zero(){ 
    air = 0;
    i = 0;
    out = 1;
}
void rev(){
    air = 2;
    ai.attach(&zero,1.0);
    out = 0;
}
int main()
{
    double tilt = 0,lo = 0,ro = 0;
    int8_t ttilt = 0,tmpread = 0,tmpttilt = 0;
    char tro = 0,tlo = 0;
    Tp.setInputLimits(-45,45);
    Tp.setOutputLimits(-0.9,0.9);
    Tp.setMode(1);
    Tp.setBias(0.0);
    while(1) {
        if(conn.getc() == 255) {
            tmpread = conn.getc();
            tmpttilt = conn.getc();
            tro = conn.getc();
            tlo = conn.getc();
            if(tmpread^tmpttilt^tro^tlo == conn.getc()){
                ttilt = tmpttilt;
                read = tmpread;
                ro = (tro-127)/127.0*0.9;
                lo = (tlo-127)/127.0*0.9;
            }
        }
        if((read>>2)%2 && i == 0){
            air = 1;
            ai.attach(&rev,1.0);
            i = 1;
        }
        Tp.setSetPoint(ttilt);
        tilt = double(sensort.getPulses());
        tilt = tilt*61/5128.0;
        Tp.setProcessValue(tilt);
        if (abs(lo) < 0.1){
            lo = 0;
        }
        if (abs(ro) < 0.1){
            ro = 0;
        }
        L.speed(lo);
        R.speed(ro);
        ot.speed(Tp.compute());
        pc.printf("%d %d\n\r",Ls,read);
        wait_ms(1);
    }
}