Tag Archives: Java/Java EE

Announcing the OCA: Oracle Certified Associate Java SE 8 Programmer I Study Guide

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Jeanne and I are pleased to announce the upcoming release of our Oracle Certified Associate Java 8 Study Guide for the Java SE 8 Oracle Programmer I exam! We have been working with Wiley Publishing for the past year to bring this book to light, and are thrilled to announce it is nearing completion. Our goal was create a book that is engaging and fun for new and veteran developers alike. The book covers all of the new features that you are required to know for the OCA 8 exam including: the Local Date/Time API, the Period class, lambda expressions, and more. And of course, it covers the “old” topics as well.

scott-and-jeanne
The book, to be tentatively titled OCA: Oracle Certified Associate Java SE 8 Programmer I Study Guide: Exam 1Z1-808, will be available for purchase later this year on Amazon.com and wherever books are sold.

Oracle has already published a beta version of the Java SE 8 Programmer I exam, with the official version to be available in the coming months.

Please visit our new OCA: Oracle Certified Associate Java SE 8 Programmer I Study Guide page for the latest information about the book. If you have any questions for us, feel free to post in the OCA forum at CodeRanch, which Jeanne and Scott visit frequently.

[first] RoboRio

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RoboRio
fact-sheet
Also see Wpilib blog post

For other posts about the 2014 FIRST conference, see the index page.  (written on my iPad; please excuse typos)

General

  • Control system 2015-2019 (Had crio for 6 years)
  • Java SE 8 (not java me)
  • Runs about 10 times faster than on crio
  • Will support Eclipse.  Chose Eclipse because better c++ support. Then Oracle announced more support in NetBeans.
  • Multi core
  • Linux based. Available by ssh, webdav. Will have admin access. Canco nnecte, but wont require
  • Will probably have an updated driver station image. Will still only run on windows. Getting more portable over time so may happen one day. They also want simpliciity for troubleshooting on the field

pic
Changes to library

  • Port numbers will shift to be zero based
  • Extensions to API will use generics
  • Will try to keep backward compatibility for two years
  • Deprecated apis will probably go away
  • Everything will be zero indexed

Physical device

  • More robust, less points of failure
  • Can integrate custom electronics into mxp expansion port – will post design kit for custom expansions
  • Power distribution board can measure current of every motor on robot
  • Design will be based on CAN. But different than CAN of past
  • Voltage regulation module (vrm) – cheaper, makes power distribution board smaller. Let’s change easily for future years
  • Will be version of talon with CAN on it. Feature comparable to jaguar. Looking into ability to connect to limit switch
  • RoboRIO weighs about a third of cirio. Plus other modules are less/smaller

Cost

  • $200 power distribution
  • $90 pneumatics
  • $49 voltage regulation
  • $435 RoboRio

board
Timeline

  • RoboRIO available in December.
  • Rest available late October in reasonable quantity
  • This system less disruptive than when crio came out so probably wont do early release of hardware
  • Enough will be in kit of parts for veteran teams to get up and running with 4 motors. Not sure if will include voltage regulation module

[first] wpilib in 2015

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Wpilib into 2015 (programming with java and c++ on the RoboRio)

Also see RoboRIO post

For other posts about the 2014 FIRST conference, see the index page.  (written on my iPad; please excuse typos)

Synergy in the tools (some of this was introduced for the 2013-2014 year and the rest was introduced earlier)

  • Really pushing commands
  • Associate commands with OI
  • Test commands individually – via buttons on SmartDashboard
  • On test mode, shows status of each subsystem on graphically
  • RobotBuilder produces wiring diagram
  • Spent a long time on RobotBuilder and command based programming (i like the command based programming, but not sold on RobotBuilder)
  • If don’t use Word the right way’ you fight with it. True of wpilib as well
  • command based programing will be improved going forward

New control system
RobotRIO

  • Dual core
  • Ethernet , usb, can, spi,i 2c and serial
  • Pwm, servo, Digital and analog io
  • No breakout boards
  • Just one light plastic piece
  • In the middle is the custom electronics port. Use if want more analog inputs, to do something creative, etc

Power distribution board

  • 12v thru circuit breakers
  • Regulated supplies for RobotRIO, VRM and PCM
  • CAN interface for logging current, temperature and battery

Pneumatics control. Module (PCM)

  • 12v or 24v pneumatics – if need both, use two modules
  • Compressor confrol
  • CAN interface
  • 8 solnoid outputs

voltatge regulator module

  • Multi regulated 12v and 5v
  • Power for d-link radio, custom circuits and ip camera

Usb wireless adapater (asus dongle)

  • Connected to usb port on RoboRIO
  • Can be positioned for improved signal

Linux

  • Standard linux with real time extensions
  • Can do memory checking or anything else that linux can do

Tools

  • Dashboard
  • New inaging tool
  • Robot simulator

Dev tools

  • Everything based on opensource
  • Eclipse
  • Java 8 se – works on Windows, Linux and Mac
  • New c++ – current gcc compilers – works on Windows and Linux
  • Not sure if will support NetBeans in addition to Eclipse
  • Choose small memory profile version ofJava
  • Uses ant to build robot program

Library changes

Mostly compatible plus

  • Improved CAN support – sync or async
  • Units and measures – can specify moving to angle, driving fixed distance, running motor at some speed
  • Continuous inputs
  • Outputs
  • RobotDrive
  • Controller strategies
  • Can move stuff from crio forward but not new code backwards

Open source dev at WPI’s end

  • Usfirst.collab,net
  • They are using mavenand gi t
  • Gerrit based checkins

Reach goals

  • Gazebo simulator in beta test
  • Online curriculum with video lessons in short chunks

Nice quote

  • The whole point of robotics is to automate to make things easier for the driver

My impressions:

People came to hear about 2015. Brad spent more than half the time on things that exist now. He also entertained a lot of questions in that first half. Unsuprisingly he ran out of time before alot of content.  He sounded surprised that he ran out of time.  I look forward to at least reading the full deck when it goes up online after championships end.