COE 499 Wireless Sensor Networks LAB 1 KFUPM

COE 499 Wireless Sensor Networks LAB 1 KFUPM, COE 499. Ayman Al Bassam

Material covered in this lab Definition of Tiny Operating System. n The need for Tiny. OS n Development and History of Tiny. OS n Component, Event Driven and Object Oriented Programming n Using Tiny. OS n Environment and Installation n nes. C n KFUPM, COE 499. Ayman Al Bassam

Definition of Tiny. OS Formal Definition: n Tiny. OS is an open-source operating system designed for wireless embedded sensor networks. It features a component-based architecture which enables rapid innovation and implementation while minimizing code size as required by the severe memory constraints inherent in sensor networks. Tiny. OS's component library includes network protocols, distributed services, sensor drivers, and data acquisition tools – all of which can be used as-is or be further refined for a custom application. KFUPM, COE 499. Ayman Al Bassam

Definition of Tiny. OS n n Tiny. OS's event-driven execution model enables fine-grained power management yet allows the scheduling flexibility made necessary by the unpredictable nature of wireless communication and physical world interfaces. Tiny. OS has been ported to over a dozen platforms and numerous sensor boards. A wide community uses it in simulation to develop and test various algorithms and protocols. New releases see over 10, 000 downloads. Over 500 research groups and companies are using Tiny. OS on the Berkeley/Crossbow Motes. KFUPM, COE 499. Ayman Al Bassam

Definition of Tiny. OS n Numerous groups are actively contributing code to the sourceforge site and working together to establish standard, interoperable network services built from a base of direct experience and honed through competitive analysis in an open environment. KFUPM, COE 499. Ayman Al Bassam

Definition of Tiny. OS In Simple words: n Tiny OS is an open source programming environment that is portable across different platforms (Motes) and works under Linux like environment. n Tiny. OS implements Component-based Programming i. e. It provides different libraries and code that can be used in conjunction with the developer’s code. n Main component includes the Boot sequence the OS scheduler and different interfaces to interact with different peripherals (sensors, radio chips. . . ) KFUPM, COE 499. Aymanyour Al Bassamown OS n Basically you are tailoring

The need for Tiny. OS • • • To set a standard operating system and programming tools that can be used in the industry. making merging applications from generation of hardware to a newer one easier. Many constrains are imposed by the hardware like: power consumption, limited computational power and storage thus, the need for a specialized OS. Allowing different devices from different manufactures to use the same code. KFUPM, COE 499. Ayman Al Bassam

Development & History of Tiny. OS n Tiny. OS began as a project at UC Berkeley as part of the Defense Advanced Research Projects Agency (DARPA) NEST program. It has since grown to involve thousands of academic and commercial developers and users worldwide. n 1999: First Tiny. OS platform (We. C) and OS implementations are developed at Berkeley. KFUPM, COE 499. Ayman Al Bassam

Development & History of Tiny. OS n n n 2000: Berkeley designs the rene platform and partners with Crossbow, Inc. , who mass produces the hardware. Tiny. OS version 0. 43 is made available to the public via Source. Forge. Pre-1. 0 versions of Tiny. OS are a mix of C and Perl scripts. April 2002: Work on the nes. C programming language begins as a collaboration between Intel Research and UC Berkeley. September 2002: Tiny. OS version 1. 0, implemented in nes. C, is released. KFUPM, COE 499. Ayman Al Bassam

Development & History of Tiny. OS n n n June 2004: Working group forms on next steps for Tiny. OS, based on experiences porting to new platforms. Group agrees to start work on 2. 0. November 2006: Tiny. OS 2. 0 released at the Sen. Sys conference in Boulder, CO. August 2008: Tiny. OS 2. 1. 0 released. KFUPM, COE 499. Ayman Al Bassam

Component, Event Driven and Object Oriented Programming n n n Tiny OS introduces a new concept in programming called Component-based Programming. The idea is to create different components and “wire” them together. A whole application can be created with out writing a single line of code. Event driven programming is used heavily in case of an event happened a component signals another component to continue processing. Object oriented programming is implemented in means of hierarchy (the use of interfaces like KFUPM, COE 499. Ayman Al Bassam

Tiny OS Code Example This is the configuration file configuration Blink. App. C{ } implementation{ components Main. C, Blink. C, Leds. C; components new Timer. Milli. C() as Timer 0; components new Timer. Milli. C() as Timer 1; components new Timer. Milli. C() as Timer 2; Blink. C -> Main. C. Boot; Blink. C. Timer 0 -> Timer 0; Blink. C. Timer 1 -> Timer 1; Blink. C. Timer 2 -> Timer 2; Blink. C. Leds -> Leds. C; } KFUPM, COE 499. Ayman Al Bassam

Tiny. OS Code Example The implementation Code module Blink. C { uses interface Timer<TMilli> as Timer 0; uses interface Timer<TMilli> as Timer 1; uses interface Timer<TMilli> as Timer 2; uses interface Leds; uses interface Boot; } implementation{ event void Boot. booted() { call Timer 0. start. Periodic( 250 ); call Timer 1. start. Periodic( 500 ); call Timer 2. start. Periodic( 1000 ); } event void Timer 0. fired() { call Leds. led 0 Toggle(); } event void Timer 1. fired() { call Leds. led 1 Toggle(); } event void Timer 2. fired() { call Leds. led 2 Toggle(); } } KFUPM, COE 499. Ayman Al Bassam

Using Tiny. OS n n n Tiny. OS is designed to operate on Linux environment Since most of us are used to deal with Windows a better solution has to be found. There are 3 workarounds that we will discuss in the next slides KFUPM, COE 499. Ayman Al Bassam

n n Option I: Using Cygwin & Installing TOS manually Cygwin is a freely available Linux API emulator under Windows that gives the feel and looks of Linux/Unix environment. The disadvantage is that after installing Cygwin TOS has to be installed manually. A tedious job but very rewarding. Will be discussed next lab. KFUPM, COE 499. Ayman Al Bassam

Option II: Using Xubuntos Live CD n n n Xubuntos is a pre configure Linux distribution with Tiny. OS 2. 0. 2 Freely available and can be booted directly from the live CD or installed as a second OS on the host machine. Easiest way to do it and very convenient. KFUPM, COE 499. Ayman Al Bassam

Option III: Using VMWare Player & Xubuntos n n VMWare player is a free Virtual machine emulator that can be used to run different images of different operating system on top of windows. The idea is OS within another OS. Xubuntos runs on top of Windows using VMWare player. Very Easy and convenient to use. KFUPM, COE 499. Ayman Al Bassam

Using Tiny. OS n All files will be available thru the lab administrator or on the course website. n All the tools can also be obtained freely online KFUPM, COE 499. Ayman Al Bassam

nes. C n n n Network embedded system C. A derivative of the C programming language. Developed by a collaboration between UC Berkley and Intel. Modified to handle special data structures and the Object oriented/ Component-based nature of TOS. More details will be given later on. KFUPM, COE 499. Ayman Al Bassam

Recourses n www. tinyos. net n Discussion boards and e-mail groups. n Start Goggling !! KFUPM, COE 499. Ayman Al Bassam