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/**
* SyncArduinoClock.
*
* portIndex must be set to the port connected to the Arduino
*
* The current time is sent in response to request message from Arduino
* or by clicking the display window
*
* The time message is 11 ASCII text characters; a header (the letter 'T')
* followed by the ten digit system time (unix time)
*/
import processing.serial.*;
public static final short portIndex = 1; // select the com port, 0 is the first port
public static final char TIME_HEADER = 'T'; //header byte for arduino serial time message
public static final char TIME_REQUEST = 7; // ASCII bell character
public static final char LF = 10; // ASCII linefeed
public static final char CR = 13; // ASCII linefeed
Serial myPort; // Create object from Serial class
void setup() {
size(200, 200);
println(Serial.list());
println(" Connecting to -> " + Serial.list()[portIndex]);
myPort = new Serial(this,Serial.list()[portIndex], 9600);
}
void draw()
{
if ( myPort.available() > 0) { // If data is available,
char val = char(myPort.read()); // read it and store it in val
if(val == TIME_REQUEST){
long t = getTimeNow();
sendTimeMessage(TIME_HEADER, t);
}
else
{
if(val == LF)
; //igonore
else if(val == CR)
println();
else
print(val); // echo everying but time request
}
}
}
void mousePressed() {
sendTimeMessage( TIME_HEADER, getTimeNow());
}
void sendTimeMessage(char header, long time) {
String timeStr = String.valueOf(time);
myPort.write(header); // send header and time to arduino
myPort.write(timeStr);
}
long getTimeNow(){
// java time is in ms, we want secs
GregorianCalendar cal = new GregorianCalendar();
cal.setTime(new Date());
int tzo = cal.get(Calendar.ZONE_OFFSET);
int dst = cal.get(Calendar.DST_OFFSET);
long now = (cal.getTimeInMillis() / 1000) ;
now = now + (tzo/1000) + (dst/1000);
return now;
}
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