Monday, February 25, 2013


This one is still related to the my previous posts. This time around, I have added features that I had promised in my earlier posts. The usage of the software remains mainly unchanged. What has changed is the way in which the firmware is written. The firmware now uses polymorphism to make it easier to adapt the communication frame work to different hardware platforms (The selected hardware platform should support C++ as a programming language to use this approach). The current implementation makes use of polymorphism at two different places
(a) For the implementation of the communication channel (UART/serial protocol in our case)
(b) For  implementing the functions required for accessing the digital and analog peripherals

Sunday, February 24, 2013

EvoPrimer Tutorial: ToolBars

This blog post is the first in series (hopefully, there will be more) of tutorials on the EvoPrimer dev kit from Raisonance. These tutorials will mainly concentrate on usage of the circle OS. This tutorial assumes that you already know how to create a simple Circle OS project. If you are not aware of the procedure to do so, you can follow this tutorial to learn about it.

For this tutorial, we will see how we can create and use a tool bar under Circle OS. Toolbars are the widgets that appear on the top of the LCD.

For this tutorial, we will build a simple game of gears, papers and scissors (I could not find a rock icon in Tango image library :p). The game logic itself is simple, the CPU makes a random selection of an object, either a rock(gears), paper or scissor and compares against the user selection, selected via the tool bar.