_02_basicTronics_LM741_as_camparator.ino

#include <FlexiTimer2.h>                // use timer for sampling to get even time base for data

#define INVERTED_INPUT_PIN 10
const int READ_PWM_PIN = A0;
const int READ_FILTERED_PIN = A1;
const int READ_DIGITAL_PIN = 8;

int inverted_value = 0;

void setup() {
  Serial.begin(115200);                 // initialize serial communications (to match that used by PlotNValues.pde)
  pinMode(INVERTED_INPUT_PIN, OUTPUT);

  FlexiTimer2::set(10, sample);
  FlexiTimer2::start();
}

void loop() {
   for (inverted_value = 0; inverted_value <= 255; inverted_value += 10) {
    analogWrite(INVERTED_INPUT_PIN, inverted_value);
    delay(100);
  }
  for (inverted_value = 255; inverted_value >= 0; inverted_value -= 10) {
    analogWrite(INVERTED_INPUT_PIN, inverted_value);
    delay(100);
  }
}

// sample values and pipe to processing
void sample() {
  String result = "";
  Serial.println(result + inverted_value + "," + analogRead(READ_PWM_PIN) + "," + analogRead(READ_FILTERED_PIN) + "," + digitalRead(READ_DIGITAL_PIN));
}