// pcRead - debugging using serial monitor
// From @gcjr https://forum.arduino.cc/t/servo-tool-needed-for-setup/1313733/8?u=davex
// Wokwi: https://wokwi.com/projects/412448490504844289
// Modified to add [d]elay: e.g. 13O13s1000d13c
// To setup the stepper: 17O18O19O and step 18s18c

const char version [] = "PcRead 240209a";

int debug = 0;

// -----------------------------------------------------------------------------
// process single character commands from the PC
#define MAX_CHAR  10
char s [MAX_CHAR] = {};

int  analogPin = 0;

void
pcRead (void)
{

  static int  val = 0;

  if (Serial.available()) {
    int c = Serial.read ();

    switch (c)  {
      case '0':
      case '1':
      case '2':
      case '3':
      case '4':
      case '5':
      case '6':
      case '7':
      case '8':
      case '9':
        val = c - '0' + (10 * val);
        break;

      case 'A':
        analogPin = val;
        Serial.print   ("analogPin = ");
        Serial.println (val);
        val = 0;
        break;

      case 'D':
        debug ^= 1;
        break;

      case 'I':
        pinMode (val, INPUT);
        Serial.print   ("pinMode ");
        Serial.print   (val);
        Serial.println (" INPUT");
        val = 0;
        break;

      case 'O':
        pinMode (val, OUTPUT);
        Serial.print   ("pinMode ");
        Serial.print   (val);
        Serial.println (" OUTPUT");
        val = 0;
        break;

      case 'P':
        pinMode (val, INPUT_PULLUP);
        Serial.print   ("pinMode ");
        Serial.print   (val);
        Serial.println (" INPUT_PULLUP");
        val = 0;
        break;


      case 'a':
        Serial.print   ("analogRead: ");
        Serial.println (analogRead (val));
        val = 0;
        break;

      case 'c':
        digitalWrite (val, LOW);
        Serial.print   ("digitalWrite: LOW  ");
        Serial.println (val);
        val = 0;
        break;

      case 'd':
        delay (val);
        Serial.print   ("delay: ");
        Serial.println (val);
        val = 0;
        break;

      case 'p':
#if !defined(ARDUINO_ARCH_ESP32)
        analogWrite (analogPin, val);
        Serial.print   ("analogWrite: pin ");
        Serial.print   (analogPin);
        Serial.print   (", ");
        Serial.println (val);
        val = 0;
#endif
        break;

      case 'r':
        Serial.print   ("digitalRead: pin ");
        Serial.print   (val);
        Serial.print   (", ");
        Serial.println (digitalRead (val));
        val = 0;
        break;

      case 's':
        digitalWrite (val, HIGH);
        Serial.print   ("digitalWrite: HIGH ");
        Serial.println (val);
        val = 0;
        break;

      case 't':
        Serial.print   ("pinToggle ");
        Serial.println (val);
        digitalWrite (val, ! digitalRead (val));
        val = 0;
        break;

      case 'v':
        Serial.print ("\nversion: ");
        Serial.println (version);
        break;

      case '\n':          // ignore
        break;

      case '?':
        Serial.println ("\npcRead:\n");
        Serial.println ("    [0-9] append to #");
        Serial.println ("  # A - set analog pin #");
        Serial.println ("  # D - set debug to #");
        Serial.println ("  # I - set pin # to INPUT");
        Serial.println ("  # O - set pin # to OUTPUT");
        Serial.println ("  # P - set pin # to INPUT_PULLUP");
        Serial.println ("  # a - analogRead (pin #)");
        Serial.println ("  # c - digitalWrite (pin #, LOW)");
        Serial.println ("  # d - delay (milliseconds #)");
        Serial.println ("  # p - analogWrite (analogPin, #)");
        Serial.println ("  # r - digitalRead (pin #)");
        Serial.println ("  # s  - digitalWrite (pin #, HIGH)");
        Serial.println ("    t  - toggle pin output");
        Serial.println ("    v  - print version");
        Serial.println ("    ?  - list of commands");
        break;

      default:
        Serial.print ("unknown char ");
        Serial.println (c, HEX);
        break;
    }
  }
}

// -----------------------------------------------------------------------------
void
loop (void)
{
  pcRead ();
}

// -----------------------------------------------------------------------------
void
setup (void)
{
  Serial.begin(9600);

  Serial.println (version);
#if defined(ARDUINO_ARCH_ESP32)
  Serial.println ("esp32");
#endif
}