c++ - Arduinosumo bot with rotatory motor -

i making sumo bot project using arduino. have no experience arduino code, have java experience. said bot has edge detector prevent falling off, l298 driver, , forth. lack of experience, don't know how arduino's code works methods , etc. said, main question how executing methods delays? getting stuck in methods no return? not entering? executing ending later? seems run motors forward without switch on or off. have checked wiring. ( apologize poor questioning- stackedoverflow virgin).

int motor_forward = 10; int motor_reverse = 9; int motor2_forward = 13; int motor2_reverse = 12; int edgedec1 = 7; //int edgedec2 = 6;  //the setup routine runs once when press reset; void setup(){  //initialize digital pin output.  pinmode(motor_forward, output);  pinmode(motor_reverse,output);  pinmode(motor2_forward,output);  pinmode(motor2_reverse,output);  pinmode(edgedec1,input);  } //the loop routine runs on , on again forever void loop(){   int indicator = random(2);    delay(5000);//5 second delay   //loop prevent 5 second delay   while(true){     if (indicator = 0){       for(int x = 0; x < random(200); x++){         forward();         edgedec();         delay(10);       }     }     else if ( indicator = 1){        for(int x = 0; x < random(200); x++){         turnleft();         edgedec();         delay(10);       }     }      else if ( indicator = 2){        for(int x = 0; x < random(200); x++){         turnright();         edgedec();         delay(10);       }     }    }  } void forward(){   //right motor   digitalwrite(motor_forward,1);//terminal d1 high   digitalwrite(motor_reverse,0);//terminal d2 low    //left motor   digitalwrite(motor2_forward,1);//terminal d1 high   digitalwrite(motor2_reverse,0);//terminal d2 low  } //going in reverse void reverse(){   //right motor   digitalwrite(motor_forward,0);//terminal d1 low   digitalwrite(motor_reverse,1);//terminal d2 high    //left motor   digitalwrite(motor2_forward,0);//terminal d1 low   digitalwrite(motor2_reverse,1);//terminal d2 high  } //rotating left void turnleft(){   //right motor   digitalwrite(motor_forward,0);//terminal d1 high   digitalwrite(motor_reverse,1);//terminal d2 low    //left motor   digitalwrite(motor2_forward,1);//terminal d1 high   digitalwrite(motor2_reverse,0);//terminal d2 low  } void turnright(){   //right motor   digitalwrite(motor_forward,1);//terminal d1 high   digitalwrite(motor_reverse,0);//terminal d2 low    //left motor   digitalwrite(motor2_forward,0);//terminal d1 high   digitalwrite(motor2_reverse,1);//terminal d2 low  } void edgedec(){   if(edgedec1 == 1){      reverse();      delay(700);      turnleft();      delay(1000);      forward();      } } 

you have couple of errors/misunderstandings in code, i've added bit of simple debugging works opening tools>serial monitor after you've downloaded code. in edgedec() function (function = java method) had if(edgedec = 1), edgedec int value of 7. wanted read value of pin numbered 7 - if(digitalread(edgedec1) == low).

also, reversed logic high (1) low (0) because hadn't tied down digitalread pins either low (using external resistors) or high (using arduino's internal resistors) - read comments in code. not sure doing while(true) loop - maybe further debugging? anyway, hope helps...

int motor_forward = 10; int motor_reverse = 9; int motor2_forward = 13; int motor2_reverse = 12; int edgedec1 = 7; //int edgedec2 = 6; int indicator; // pulled out of loop - askchipbug  string repeatstring; //debugging variable, stops debug string repeating in serial monitor when watching loop - askchipbug  //the setup routine runs once when press reset; void setup(){   serial.begin(9600);           // set serial library @ 9600 bps, using serialmonitor debug - askchipbug   //initialize digital pin output.   pinmode(motor_forward, output);   pinmode(motor_reverse,output);   pinmode(motor2_forward,output);   pinmode(motor2_reverse,output);   pinmode(edgedec1,input_pullup); // set high doesn't float - askchipbug   // can use internal 20k pullups input_pullup means 1 = off, 0 = on   // or have use external pulldown resistors have 1 = on, 0 = off   pr("setup completed"); // askchipbug  } //the loop routine runs on , on again forever void loop(){   randomseed(analogread(0)); // seeds random() function different number each time loop runs - askchipbug   indicator = random(2);     pr("indicator: " + string(indicator)); // askchipbug   pr("5 second delay");   delay(5000);//5 second delay   //loop prevent 5 second delay   while(true){     if (indicator == 0){ //you had set indicator = 0 - askchipbug       pr("indicator: " + string(indicator)); // askchipbug       for(int x = 0; x < random(200); x++){         forward();         edgedec();         delay(10);       }     }     else if ( indicator = 1){       pr("indicator: " + string(indicator)); //askchipbug       for(int x = 0; x < random(200); x++){         turnleft();         edgedec();         delay(10);       }     }     else if ( indicator = 2){       pr("indicator: " + string(indicator));// askchipbug       for(int x = 0; x < random(200); x++){         turnright();         edgedec();         delay(10);       }     }   }  } void forward(){    //right motor   pr("forward"); //askchipbug   digitalwrite(motor_forward,1);//terminal d1 high   digitalwrite(motor_reverse,0);//terminal d2 low    //left motor   digitalwrite(motor2_forward,1);//terminal d1 high   digitalwrite(motor2_reverse,0);//terminal d2 low } //going in reverse void reverse(){   pr("reverse"); //askchipbug   //right motor   digitalwrite(motor_forward,0);//terminal d1 low   digitalwrite(motor_reverse,1);//terminal d2 high    //left motor   digitalwrite(motor2_forward,0);//terminal d1 low   digitalwrite(motor2_reverse,1);//terminal d2 high } //rotating left void turnleft(){   pr("turn left"); //askchipbug   //right motor   digitalwrite(motor_forward,0);//terminal d1 high   digitalwrite(motor_reverse,1);//terminal d2 low    //left motor   digitalwrite(motor2_forward,1);//terminal d1 high   digitalwrite(motor2_reverse,0);//terminal d2 low } void turnright(){   pr("turn right"); //askchipbug   //right motor   digitalwrite(motor_forward,1);//terminal d1 high   digitalwrite(motor_reverse,0);//terminal d2 low    //left motor   digitalwrite(motor2_forward,0);//terminal d1 high   digitalwrite(motor2_reverse,1);//terminal d2 low } void edgedec(){   pr("edge detector: " + string(digitalread(edgedec1))); // read pin 7 - askchipbug   if(digitalread(edgedec1) == low){ // remember we're using internal pullups low = on - askchipbug     pr("edge detected!"); // askchipbug     reverse();     delay(700);     turnleft();     delay(1000);     forward();   } }  //simple debug technique - use pr("something"); in code - askchipbug void pr(string txt){   if(repeatstring != txt){     //if debug text different, print     serial.println(txt); //prints text , adds newline     serial.flush(); //waits data printed     delay(1000); //just pauses scrolling text 1 second, make bigger if want longer pause     repeatstring = txt;   } }