Auto Range OD Setup

// Auto Range OD Setup
//
#define R1_LED 2
#define R2_LED 3
#define SENSE_INPUT A0
#define REF_V 5 // Default Reference Voltage for Uno R3
#define READ_DELAY 250 // microseconds quiet time before analogRead
int analogVal = 0;
int gainVal = 1;
float analogVoltage = 0;

void setup(){
  Serial.begin(115200);
  pinMode(LED_BUILTIN, OUTPUT);
  pinMode(R1_LED, INPUT); // Puts pin in HI-Z mode
  pinMode(R2_LED, INPUT); // Puts pin in HI-Z mode
}

void loop(){
  pinMode(R2_LED, INPUT); // Puts pin in HI-Z mode
  pinMode(R1_LED, OUTPUT);// Puts pin in LOW state and turns on LED at low current
  gainVal = 1;
  delayMicroseconds(READ_DELAY);
  analogVal=analogRead(SENSE_INPUT);
  if(analogVal<100){
    pinMode(R1_LED, INPUT); // Puts pin in HI-Z mode
    pinMode(R2_LED, OUTPUT);// Puts pin in LOW state and turns on LED at high current
    gainVal = 5;
    delayMicroseconds(READ_DELAY);
    analogVal=analogRead(SENSE_INPUT);
  }
  analogVoltage=analogVal*(REF_V/1023);
  Serial.print(analogVal);
  Serial.print(", ");
  Serial.println(gainVal);
}

bool cycleTime1(bool setVal, unsigned long valMicros){
  if(setVal){ // initialize
    // initialize
    tStart = micros();
    return false
  }else{ // run
    // run
    if(micros()-valMicros>tStart){
      return true;
    }else{
      return false;
    }
  }
}

void exitation(bool state, int intensity){
  switch(intensity){
    case 1:
    pinMode(R2_LED, INPUT); // Puts pin in HI-Z mode
    pinMode(R1_LED, OUTPUT);// Puts pin in LOW state
    digitalWrite(R1_LED, LOW);// Ensures LOW state on pin
    break;
    case 2:
    pinMode(R1_LED, INPUT); // Puts pin in HI-Z mode
    pinMode(R2_LED, OUTPUT);// Puts pin in LOW state
    digitalWrite(R2_LED, LOW);// Ensures LOW state on pin
    break;
    case 3:
    pinMode(R1_LED, OUTPUT);// Puts pin in LOW state
    pinMode(R2_LED, OUTPUT);// Puts pin in LOW state
    digitalWrite(R1_LED, LOW);// Ensures LOW state on pin
    digitalWrite(R2_LED, LOW);// Ensures LOW state on pin
    break;
    default:
    pinMode(R1_LED, INPUT); // Puts pin in HI-Z mode
    pinMode(R2_LED, INPUT); // Puts pin in HI-Z mode
    break;
}