Category: Sparky

The code for Sparky Version 2 is just about finished. I need to swap something I did back-to-front with something Mat did far more elegantly and in fewer lines, but the logic’s sound. Here, with a bit of editing, is Oxygen v7. V1-5 were debugging programs of various sorts.

/* Version 7 of Oxygen is the software implementation.
 * 
 * We do not use pins 0 & 1 (RX/TX) for the main board.
 * We scan LVL after smoothing, compare to the set voltages of 'max_trigger', and 'min_trigger' trigger DIR to 1 or 0 if we want to move.
 * We then hit STEP.
 * Pins should be set to cross directly to DIR and STEP, on veroboard.
 * For convenience, we begin crossing at pin 3, with pin 2 being the zoom toggle
 * 
 * For debugging, we output LVL, MAX, MIN, DIR to serial, and comment that out.
 * 
 * Arduino takes in LVL and four cut-out or direction override pins, plus one 'zoom' pin to speed up or slow down stepping in software, and outputs 7 pins - M0, 1, 2, Step, Dir, /Sleep, /Reset

 */

// hardware constants for board input/output

const int ledPin = 13;
const int zoomPin = 2;  // earth to 0v on Arduino board to increase speed (decrease software delay)

// digital (output) pins (Arduino Pro Mini matched to DRV8825 Stepper Driver)
const int dirPin = 3;
const int stepPin = 4;
const int sleepPin = 5;
const int resetPin = 6;

// step size pin array
int mPins[3] = {7, 8, 9};
const int mPinCount = sizeof(mPins)/sizeof(int);
int mPinStates[mPinCount] = {};
// char *mPinNames[mPinCount] = {"M0", "M1", "M2"};  // Probably only ever in debugging/humanised printing

// Input for cut-outs and manual drive
const int upperCutoutPin = 10;
const int lowerCutoutPin = 11;
const int driveUpPin = 15;  // A1 Can be used as digital pin.
const int driveDownPin = 16;// A2 can be used as digital pin.

// analogue (measurement) pins
const int levelPin = A0;

// measurement constants
/* lvl = 0...1023 (corresponding to 0 to 5v ish) */

const int AnalogReadsPerVolt = 200;  //1000 ish corresponds to 5v

#define volts  // defines volts as a word to ignore by defining it as blank

const int max_trigger = 1 volts * AnalogReadsPerVolt;
const int min_trigger = .1 volts * AnalogReadsPerVolt;

// measurement variables

int lvl = 0;

// move-related variables and calculations

int move_rate = 100;  // Used for speeding up/slowing down in software
int step_ratio = 1;   // Valid options, 1, 2, 4, 8, 16, 32
int step_index = 0;   // used to keep track of which result we want
int stepsize_results[] = {32, 16, 8, 4, 2, 1};
const int stepsize_count = sizeof(stepsize_results) / sizeof(int);
int modePinSettings[stepsize_count] = {5, 4, 3, 2, 1, 0}; // read from High/Low table in docs, M2 first

/* Finds index within modePinSettings, to give us a later result */
int find_index(int array[], int count, int value)
{
  int i;
  for(i=0; i>= 1;
  }
  
  
  digitalWrite(sleepPin, HIGH); // /SLEEP - high to suppress behaviour
  
  // Reset Stepper Board 
  digitalWrite(resetPin, LOW);
  delay(5);
  digitalWrite(resetPin, HIGH); // /RESET
  digitalWrite(ledPin, HIGH);

  //Serial.print("Initialised with min ");
  //Serial.println(min_trigger);
  
}

void loop()  {
  
  
  if(digitalRead(zoomPin) == LOW){  // move rate will appear twice in each loop that moves, once in each loop that does not move
    move_rate = 50;
  } else {
    move_rate = 500;}
  //Serial.print("zoomPin: ");
  //Serial.print(digitalRead(zoomPin));
  //Serial.print("move_rate: ");
  //Serial.println(move_rate);
  
  
  if(digitalRead(driveUpPin) == LOW) {
    //Serial.println("Drive pin: Up.");
    stepUp(move_rate);
  } else if(digitalRead(driveDownPin) == LOW) {
    //Serial.println("Drive pin: Down.");
    stepDown(move_rate); // Behaviour under thick fingers: shout at clumsy person
  } else {  

    lvl = analogRead(levelPin);
    
    if(lvl < min_trigger) {
      //Serial.println("Calling stepUp()");
      stepUp(move_rate);
      // //Serial.println("Moving Up.");  // debugging line
    }
    else if(lvl > max_trigger) {
      //Serial.println("Calling stepDown()");
      stepDown(move_rate);
      // //Serial.println("Moving Down.");  // debugging line
    } else {//Serial.println("Fallthrough.");
    } // lvl not triggering either threshold.  Try earthing it to be sure it goes up.
  }
}