Nested Switch Case with While Loop

Projects Programming
1

Hello,

I am trying to make my Arduino UNO output a voltage to a specififed pin when a button is pressed and given certain input voltages, however it is not doing this. The code compiles and I have run a few tests measuring output voltages to narrow down the problem.

What I know so far:

  1. The board identifies input voltages and assigns values to the variables "motorID" and "motorDir" correctly.

  2. Using digitalWrite(case0test,HIGH) I found that case 0 works and is executed since I do get a voltage output.

  3. case 1 from the primary switch-case statement and and the entirety of both of the secondary switch-case statements that depend on (motorIDout) do not run because the both digitalWrite(case0test,HIGH) and digitalWrite(buttonPresstest,HIGH) do not produce any output voltages.

Ideas?

// Other constants
float recerveddec;
const int sethalfwavelength = 1000;
int motorIDout;
int motorDir;

// Connections to A4988
const int motor1dirPin = 2;  // Motor 1 direction
const int motor1stepPin = 3; // Motor 1 movement
const int motor2dirPin = 4;  // Motor 2 direction
const int motor2stepPin = 5; // Motor 2 movement
const int case0test = 6; // Case 0 testing
const int case1test = 7; // Case 1 testing
const int motorDirtest = 8; //For nested case testing
const int buttonPresstest = 9;

// Connections to User Interface
const int buttonPress = 10; //Pin for manual control
const int motorIDin = 11; // ID pin for motors
const int controlDir = 12; // Rotation direction definition pin
const int emergencystop = 13;  // Emergency stop pin

void setup() {
 
 // Designate Output Pins
 pinMode(motor1stepPin,OUTPUT);
 pinMode(motor1dirPin,OUTPUT);
 pinMode(motor2stepPin,OUTPUT);
 pinMode(motor2dirPin,OUTPUT);
 pinMode(motorDirtest,OUTPUT);
 pinMode(buttonPresstest,OUTPUT);
 pinMode(case0test,OUTPUT);
 pinMode(case1test,OUTPUT);
 // Designate Input Pins
 pinMode(buttonPress,INPUT_PULLUP);
 pinMode(motorIDin,INPUT_PULLUP);
 pinMode(controlDir,INPUT_PULLUP);
 pinMode(emergencystop,INPUT_PULLUP);

 delay(5000);
}


// Stepper Motor Program Begins and Loops
void loop()
{
  recData();
  ManMoveMotor();
}

void recData()
{

  if (digitalRead(motorIDin) == LOW) {
   int motorIDout = 1;
  }
  else {
   int motorIDout = 2;
  }
  if (digitalRead(controlDir) == LOW) {
   int motorDir = 0;
   digitalWrite(motorDirtest,LOW);
  }
  else {
   int motorDir = 1;
  }

}

void ManMoveMotor()
{
 switch (motorDir) {
   case 0: //Clockwise rotation case
     digitalWrite(motor1dirPin,LOW);
     digitalWrite(motor2dirPin,LOW);
     digitalWrite(case0test,HIGH);
     switch (motorIDout) {
       case 1: //To control motor 1
         while (digitalRead(buttonPress) == LOW) { // If button is being pressed, execute loop
           digitalWrite(motor1stepPin,HIGH);
           delayMicroseconds(sethalfwavelength);
           digitalWrite(motor1stepPin,LOW);
           delayMicroseconds(sethalfwavelength);
           
           digitalWrite(buttonPresstest,HIGH);
         }
         digitalWrite(buttonPresstest,LOW);
         break; //Break for case 1 "motor 1 control"
       case 2: //To control motor 2
         while (digitalRead(buttonPress) == LOW) { // If button is being pressed, execute loop
           digitalWrite(motor2stepPin,HIGH);
           delayMicroseconds(sethalfwavelength);
           digitalWrite(motor2stepPin,LOW);
           delayMicroseconds(sethalfwavelength);
           
           digitalWrite(buttonPresstest,HIGH);
         }
         digitalWrite(buttonPresstest,LOW);
         break; //Break for case 2 "motor 2 control"
     }
     delay(1);
     break; //Break for case 0 "Clockwise rotation"
   case 1: //Counter-Clockwise rotation case
     digitalWrite(motor1dirPin,LOW);
     digitalWrite(motor2dirPin,LOW);
     digitalWrite(case1test,HIGH);
     switch (motorIDout) {
       case 1: //To control motor 1
         while (digitalRead(buttonPress) == LOW) { // If button is being pressed, execute loop
           digitalWrite(motor1stepPin,HIGH);
           delayMicroseconds(sethalfwavelength);
           digitalWrite(motor1stepPin,LOW);
           delayMicroseconds(sethalfwavelength);
           
           digitalWrite(buttonPresstest,HIGH);
         }
         digitalWrite(buttonPresstest,LOW);
         break; //Break for case 1 "motor 1 control"
       case 2: //To control motor 2
         while (digitalRead(buttonPress) == LOW) { // If button is being pressed, execute loop
           digitalWrite(motor2stepPin,HIGH);
           delayMicroseconds(sethalfwavelength);
           digitalWrite(motor2stepPin,LOW);
           delayMicroseconds(sethalfwavelength);
           
           digitalWrite(buttonPresstest,HIGH);
         }
         digitalWrite(buttonPresstest,LOW);
         break; //Break for case 2 "motor 2 control"
     }
     delay(1);
     break; //Break for case 1 "Counter-Clockwise rotation"
 }
 delay(1);
 digitalWrite(buttonPresstest,LOW);
 digitalWrite(case0test,LOW);
 digitalWrite(case1test,LOW);
}
3

@Delta_G I did google C++ scope after the first post but what I read did not address this issue specifically.

5

@Delta_G I think understand the difference between global and local variables and looked at examples in terms of how they can be referenced in different functions. What I believe is the issue that you pointed out to me is that I completely redefined the global variable as a local variable. Since I did define it globally already and then redefine it locally, it then turned into a local variable when it ran this specific function. Because I want it to be a dynamic variable, what I would need to do is just drop the "int" part when re-assigning a number to this variable locally so that it can can continue to exist globally but now with a new assignment. I will continue to look into more resources meanwhile about this topic since Matlab applies this concept differently and I have only worked in that language prior to this.