NOR.ino

/*

  ResistorTransistorLogic/NOR
  Test the basic resistor-transistor logic NOR gate

  For info and circuit diagrams see https://github.com/tardate/LittleArduinoProjects/tree/master/Electronics101/ResistorTransistorLogic/NOR

 */

#define IN_A_PIN 6
#define IN_B_PIN 7
#define STEP_DELAY 500

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

#define TRACE_COUNT   3        // 1,2,..6 - the number of values to sample from analog inputs A0,1,..5 respectively
#define INPUT1_PIN   A0        // the first analog input.

#define SAMPLING_FREQUENCY 10  // milliseconds

void setup() {
  pinMode(IN_A_PIN, OUTPUT);
  pinMode(IN_B_PIN, OUTPUT);

  Serial.begin(115200);                 // initialize serial communications (to match that used by PlotNValues.pde)
  FlexiTimer2::set(SAMPLING_FREQUENCY, sample);   // set sampling procedure on timer interrupt
  FlexiTimer2::start();
}

void loop() {

  digitalWrite(IN_A_PIN, LOW);
  digitalWrite(IN_B_PIN, LOW);
  delay(STEP_DELAY);

  digitalWrite(IN_A_PIN, LOW);
  digitalWrite(IN_B_PIN, HIGH);
  delay(STEP_DELAY);

  digitalWrite(IN_A_PIN, HIGH);
  digitalWrite(IN_B_PIN, LOW);
  delay(STEP_DELAY);

  digitalWrite(IN_A_PIN, HIGH);
  digitalWrite(IN_B_PIN, HIGH);
  delay(STEP_DELAY);

}

/*
  Command: read the current values and send to the serial port.
  This sends raw values (0-1023) because that is what PlotNValues processing script expects.
 */
void sample() {
  String result = "";
  for(int i=0; i < TRACE_COUNT; i++) {
    if(i>0) result += ",";
    result += analogRead(INPUT1_PIN + i);
  }
  Serial.println(result);
}