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/*
 Get acceleration data from Chronos watch.
 Taken from info posted at: http://e2e.ti.com/support/microcontrollers/msp43016-bit_ultra-low_power_mcus/f/166/t/32714.aspx

 Based off of the latest Python code on the Chronos wiki that I wrote.


 Copyright (c) 2010 Sean Brewer 
 Permission is hereby granted, free of charge, to any person
 obtaining a copy of this software and associated documentation
 files (the "Software"), to deal in the Software without
 restriction, including without limitation the rights to use,

 copies of the Software, and to permit persons to whom the
 Software is furnished to do so, subject to the following
 conditions:

 The above copyright notice and this permission notice shall be
 included in all copies or substantial portions of the Software.

 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
 OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
 HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 OTHER DEALINGS IN THE SOFTWARE.


If you want you may contact me at seabre986@gmail.com
or on reddit: seabre
*/

import processing.serial.*;

//Take what we know about the packets for starting the access point
//and put it in its integer representation
int startAccessPointNum[] = {255, 7, 3};
//Take what we know about the packets for aquiring data from the chronos
//and put it in its integer representation
int accDataRequestNum[] = {255, 8, 7, 0, 0, 0, 0};

//Convert it all to bytes so that watch will understand
//what we're talking about..
byte startAccessPoint[] = byte(startAccessPointNum);
byte accDataRequest[] = byte(accDataRequestNum);


// We want to talk to the chronos...
Serial chronos;

//Hopefully, the port you're looking for is the same one
//as the chronos is assigned to. If not, change the
//"0" in Serial.list() to the appropriate value.
chronos = new Serial(this, Serial.list()[0], 115200);

//Start the access point..
chronos.write(startAccessPoint);


//Until the port is still availible...
//Send data request to chronos.
chronos.write(accDataRequest);

//Processing doesn't like infinite loops...but we're going to do one anyway.
while (chronos.available() >= 0) {
    
    //Accelerometer data is 7 bytes long. This looks really lame, but it works.
    int[] buf = new int[7];  
    
    for (int i = 0; i < 7; i++)
      buf[i] = chronos.read();
    
    //Fourth byte indicates if there are coordinates. If the byte is 0xFF (255)
    //Then there is no data. If it is 1, then data is valid.
    //Sometimes the datatype comes back as other values...not sure if that
    //means anything or not.
    //Also, the Python version of this code ALWAYS returns 0xFF (255)..
    //Don't know why that is.
    if (buf[3] == 1)  {
        //println("Datatype: " + str(buf[3]));
        println ("x: " + str(buf[4]) + " y: " + str(buf[5]) + " z: " + str(buf[6]));
    
      }
    
    chronos.write(accDataRequest);    
}