// Pascal.pde This program needs Pascal.ino to controle Arduino Uno
// Pascal.ino modified from the original scktchs "i2c_command" provided by Infineon Technologies
// This version is tested on Raspverry Pi Linux only 
// prog. by Yoshio Okamoto 2022-01-31 

import processing.serial.*;

int xmax = 1500;        // windows size for width
int ymax = 800;         //             for height
int tmax = xmax * 12;   // data max   12: Rows for signal line 
int base = 0;           // wave signal base line shift; calicurating automatially from the initial data 

int x = 0;              // for signal display
int y = 0;
int px = 0;             // past coordinate x
int py = 0;             //                y

int k = 0;              // mean value counter
int kmax = 10;          // data max for mean value caliculasion
int yy = 0;             // sum for y data mean caliculation

int m = 0;              // minte for time mark
int pm = 0;             // past value of m 
 
Serial Port;            //Port: serial port name
int lf = 10;            // ASCII return 

String Pascal = "";     // pressure value string
float pressure;         // presure value float

int t = 0;
int tt = 0;
int ttt = 0;            // row number
int tm = 0;             // time mark
float M = 300.0;        // Magnify pressure level for display

String datastr;         // display for time stamp
String datetimestr;     // 
PrintWriter output;
void setup() {
  size(1500, 800); 
  stroke (0,200,200);
  background(0);
  // list available serial port  
  printArray(Serial.list());
  Port = new Serial(this, Serial.list()[1], 9600);        // if no line, please check the comment window of Processing, 
  Port.clear();                                            // and adjust Serial.list()[1] to Arduino port number
  Pascal = Port.readStringUntil(lf);
  Pascal = null;
  Port.bufferUntil(10);
  frameRate(5);       // sampling rate/sec 5[Hz], you can adjust it, if need    
  delay(2000);      // skip 2[sec] for initialize 
  Port.write('*');
}

void draw() {
    pressure = float(Pascal)/100;    // Pascal to hPa
    println(pressure);                // pressure value display
      
// data file init.
    if (t == 0){     
    datetimestr = year()+"/"+nf(month(),2)+"/"+nf(day(),2)+"/Time="+nf(hour(),2) + "_" + nf(minute(),2) + "_" + nf(second(),2)+"_DPS310";  // for Windows    
    output = createWriter(datetimestr+".dat");
    text( datetimestr,10,35);  
    Port.write( '*' );
    // caliculationg base from initial mean of y 
    for (k=0; k<kmax; k++){
      y = int(-(pressure - 1013) * M );    
      yy = yy +y;          
    }
    base = -int(yy/kmax) + 100;            // new value for base
    yy = 0;                                // y initalize
    text(": "+ pressure,200,35);                // initial pressure[hPa] on display   
    }      
  // time mark   
    m = minute();
    if (m == pm)
        tm = 0;
    else if (m % 60 == 0)
        tm = 8;
    else
        tm = 5;
    pm = m;    // display 1 ch
      stroke (50, 250, 250);   // for 1ch with light blue color      
      x = tt;  
      y = int(-(pressure - 1013) * M ) + base + ttt*40 - tm;
     println(y);              // monitor for y, if you find no line on the window, please check this value and adjust the base value  
     
  // display line signal
    if ((t==0) || (tt == 0))     
      point (x, y);              
    else 
      line (px, py, x, y);
  // past data renewal
      px = x;
      py = y;
      
  // data to text file
     output.println(nf(pressure,4,2));       // pressure value writing to file
  // counter for time mark timing
       tt = t % (width);
      ttt = int(t/width);   // Row number
        t = t+1;
        
  // saving digit file and window image file
  // if the signal number reach window max, then renewal drawing parameter     
   if (t>tmax){
      t = 0;
      tt = 0;
  // save window image
    save( datetimestr+".png" );
    output.flush();        // write buffer to file
    output.close();        // close file
    background(0);         // reflesh window
   }
  }

// for 1ch signal data input from Arduino 
void serialEvent( Serial Port ) {
  if ( Port.available() > 1 ) {
    Pascal = Port.readStringUntil(10);        // data are input from Arduino as string not float or int -> this takes long time
    Port.write( '*' );
  }
}