Yellowsnow's Teensy 3.2 Osciloscope

                                     Yellowsnow's Teensy 3.2 oscilloscope



                                                  Code for Teensy
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

// Yellowsnow's Oscilloscope Free for use..instructions  https://www.youtube.com/watch?v=VQwh-y2jW_c

#define pin A0
int sample[1000];
int x = 0;
unsigned long startTime = 0;
unsigned long stopTime = 0;

int startSample = 0;
int sampleTime = 1000;                  // sample time length in microseconds
int samplesTaken = 0;
char incomingMess = 0;
int dump = 0;

void setup() {


  pinMode(pin, INPUT);
  Serial.begin(115200);
}

void loop() {

  if (Serial.available() > 0) {
    incomingMess = Serial.read();
    messDo();
  }


  if(startSample == 1) {
    x = 0;
    startTime = micros();
    stopTime = startTime + sampleTime;
    while(micros() <= stopTime && x <= 999) {
      sample[x] = analogRead(pin);
      x = x + 1;
      }
    samplesTaken = x;
    startSample = 0;
  }

}



void messDo() {
  if(incomingMess == 'T') {           // T=start
    startSample = 1;
  }
  if(incomingMess == 'S') {           // S=sendsample
    sendSample();
  }
  if(incomingMess == 'A') {          // A=send amount of samples taken
    sendAmount();
  }
}

void sendSample() {
  x = 0;
  while(x <= samplesTaken) {
    dump = sample[x];
    Serial.println(dump);
    x = x + 1;

  }
  Serial.println("8888");
}

void sendAmount() {
  Serial.println(samplesTaken);
}



////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
                                                //Code for Processing

// Yellowsnow's Oscilloscope Free for use..instructions  https://www.youtube.com/watch?v=VQwh-y2jW_c

import processing.serial.*;
Serial port;
float x = 0;
float xLS = 0;
int time = 1;
int timeLS = 0;
int volts = 0;
int readyToRead = 0; // 1=ready to read samples, 2=getting sample amount
float num = 0;
int sampleCount = 0;
int T = 0;
float[] sample = new float[1000];
int G = 0;
int M = 0;

void setup() {
  size(1000, 600);


  port = new Serial(this, "/dev/ttyACM0", 115200);  // windows "COM3"
  port.bufferUntil('\n');

  grid();
}
void draw() {

  if(readyToRead == 1) {
   num = sample[G];


   num = map(num, 0, 1023, 520, 20);
    stroke(#FC0D29);
    strokeWeight(4);
    line(timeLS, xLS, M, num);
    xLS = num;
    timeLS = M;

    M = M + 9;      // change if you change sample time 1000micro best at 9, lower number for longer sampletime
    if(G >= 999) {
      G = 0;
    } else {
    G = G + 1;
    }

  }
}
void grid() {
  background(0);
  stroke(255);
  strokeWeight(1);
  line(0, 520, 1000, 520); //zero
  line(0, 445, 1000, 445); //.5 volt
  line(0, 370, 1000, 370);  //1volt
  line(0, 295, 1000, 295);  //1.5volt
  line(0, 220, 1000, 220); //2volt
  line(0, 145, 1000, 145);  //2.5volt
  line(0, 70, 1000, 70);  //3volt
  line(0, 20, 1000, 20); //3.3 volt
  fill(255);
  textSize(20);
  text("0", 950, 520);
  text("0.5V", 950, 445);
  text("1V", 950, 370);
  text("1.5V", 950, 295);
  text("2V", 950, 220);
  text("2.5V", 950, 145);
  text("3V", 950, 70);
  text("3.3V", 950, 20);
  fill(#29F227);
  rect(100, 530, 100, 60);
  rect(700, 530, 200, 60);
  fill(#F2FC27);
  rect(300, 530, 250, 60);
  fill(#ED4E32);
  rect(590, 530, 80, 60);
  textSize(25);
  fill(0);
  text("START", 110, 570);
  textSize(25);
  text("get sample amount", 310, 558);
  text("Get samples", 710, 570);
  text("Clear", 600, 570);


}

void serialEvent (Serial port) {
  if(readyToRead == 1) {
    sample[T] = float(port.readStringUntil('\n'));
    T = T + 1;
  } else {
  x = float(port.readStringUntil('\n'));

  }
}

void mousePressed() {
  if(mouseX >= 100 && mouseX <= 200 && mouseY >= 530 && mouseY <= 590) {

    port.write('T');
  }
  if(mouseX >= 300 && mouseX <= 550 && mouseY >= 530 && mouseY <= 590) {
    readyToRead = 2;
    port.write('A');
    delay(30);
    fill(0);
    textSize(25);
    text(x, 320, 585);

  }
  if(mouseX >= 700 && mouseX <= 900 && mouseY >= 530 && mouseY <= 590) {
    readyToRead = 1;
    T = 0;

    port.write('S');

  }
  if(mouseX >= 590 && mouseX <= 670 && mouseY >= 530 && mouseY <= 590) {
   grid();
   readyToRead = 0;
   timeLS = 0;
   xLS = 0;
   G = 0;
   M = 0;
   num = 0;

  }

}