int pin;
int pinState;
int probe;
int probeMode;

//------------------------------------------------------------------------------------------------------
void setup() {
  // put your setup code here, to run once:
  pin = 2;
  pinState = 1;
  pinMode(LED_BUILTIN, OUTPUT);
  pinMode(2, OUTPUT);
  pinMode(3, OUTPUT);
  pinMode(4, OUTPUT);
  
  Serial.begin(115200);
}
//=====================================================================================================
void loop() {
  // put your main code here, to run repeatedly:
  for (pin = 2; pin < 5; pin++) { // pins 2,3,4 Repeat
    for (int pinState = 1; pinState < 5; pinState++) { // pinState 1,2,3,4 Repeat
      setPinState(pin,pinState);
      delay(2000);
    }
  }
 
}
//====================================================================================================

// Define Functions here
void setProbeState(int probe, int probeMode) {
  // ignore probe, as we only have one at the moment...
  switch (probeMode) {
    case 1:
      //probe1mode is HiZ_Gnd
      allPinsInput();

      break;
    case 2:
      allPinsInput();
      break;
    case 3:
      allPinsInput();
      break;
    case 4:
      allPinsInput();
      break;
    case 5:
      allPinsInput();
      break;
    case 6:
      allPinsInput();
      break;
    case 7:
      allPinsInput();
      break;
    case 8:
      allPinsInput();
      break;
    case 9:
      allPinsInput();
      break;
    case 10:
      allPinsInput();
      break;
  }

}
/*----------------- SCRATCH  ----------------------------------------------
  TestMode  Probe1mode  Probe2mode    Connection diagram                          Max Current
  --------- -------     -------       -------------------------------------       -----------
  1         HiZ_Gnd     HiZ_Vcc       Gnd-470k-------->DUT<---470k-Vcc  					5uA
  2         HiZ_Gnd     MedZ_Vcc      Gnd-470k-------->DUT<---1k-Vcc					  	11uA
  3         MedZ_Gnd    MedZ_Vcc      Gnd-1k---------->DUT<---1k-Vcc  						2.5mA
  4         MedZ_Gnd    LoZ_Vcc       Gnd-1k---------->DUT<---int20R-100-Vcc			4.46mA
  5         LoZ_Gnd     LoZ_Vcc       Gnd-int20R-100-->DUT<---int20R-100-Vcc			20.8mA
  6         HiZ_Vcc     HiZ_Gnd       Vcc-470k-------->DUT<---470k-Gnd  					5uA
  7         HiZ_Vcc     MedZ_Gnd      Vcc-470k-------->DUT<---1k-Gnd  						11uA
  8         MedZ_Vcc    MedZ_Gnd      Vcc-1k---------->DUT<---1k-Gnd  						2.5mA
  9         MedZ_Vcc  	LoZ_Gnd       Vcc-1k---------->DUT<---int20R-100-Gnd      4.46mA
  10        LoZ_Vcc   	LoZ_Gnd       Vcc-int20R-100-->DUT<---int20R-100-Gnd      20.8mA
*/
void setPinState(int pin, int pinState) {
  switch (pinState) {
    case 1:
      pinMode(pin, OUTPUT);
      digitalWrite(pin, HIGH);
      Serial.print("setPinState case1-o/p hi \t");
      Serial.print("pinState-Pin=");
      Serial.print(pin);
      Serial.print("\t");
      Serial.print("pinState=");
      Serial.println(pinState);
      break;
    case 2:
      pinMode(pin, OUTPUT);
      digitalWrite(pin, LOW);
      Serial.print("setPinState case2-o/p low\t ");
      Serial.print("pinState-Pin=");
      Serial.print(pin);
      Serial.print("\t");
      Serial.print("pinState=");
      Serial.println(pinState);
      break;
    case 3:
      pinMode(pin, INPUT);
      Serial.print("setPinState case3-input \t");
      Serial.print("pinState-Pin=");
      Serial.print(pin);
      Serial.print("\t");
      Serial.print("pinState=");
      Serial.println(pinState);
      break;
    case 4:
      pinMode(pin, INPUT_PULLUP);
      Serial.print("setPinState case4-i/p PU \t");
      Serial.print("pinState-Pin=");
      Serial.print(pin);
      Serial.print("\t");
      Serial.print("pinState=");
      Serial.println(pinState);
      break;
  }
}

void allPinsInput() {
  pinMode(2, INPUT);
  pinMode(3, INPUT);
  pinMode(4, INPUT);
}
/*
      Serial.print("pin=");
      Serial.println(pin);
      Serial.print("pinState=");
      Serial.println(pinState);

      digitalWrite(LED_BUILTIN, HIGH); // Turn the LED on
      digitalWrite(2, HIGH); // Turn the LED on
      digitalWrite(3, HIGH); // Turn the LED on
      digitalWrite(4, HIGH); // Turn the LED on
      delay(300);
      digitalWrite(LED_BUILTIN, LOW); // Turn the LED off
      digitalWrite(2, LOW); // Turn the LED off
      digitalWrite(3, LOW); // Turn the LED off
      digitalWrite(4, LOW); // Turn the LED off
      delay(300);
*/