WSN Programming Course

TinyOS Lab: Basic Programming

Manuel Fernández

UAH, 18th September 2013

• Introduction to nesC • Components • File Types • Basic program: NullC • How to compile • NesC variables • Eclipse IDE • Exercises

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Contents

• A nesC application consists of one or more components assembled, or wired, to form an application executable. • Components define two scopes:

• one for their specification which contains the names of their interfaces, and • a second scope for their implementation.

COMPONENT A SPECIFICATION

IMPLEMENTATION

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NesC (I)

• A component provides and uses interfaces. • The provided interfaces are intended to represent the functionality that the component provides to its user in its specification. • The used interfaces represent the functionality the component needs to perform its job in its implementation.

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NesC (II)

• Interfaces are bidirectional: they specify a set of commands, which are functions to be implemented by the interface's provider, and a set of events, which are functions to be implemented by the interface's user. For a component to call the commands in an interface, it must implement the events of that interface. • The set of interfaces which a component provides together with the set of interfaces that a component uses is considered that component's signature.

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NesC (III)

• There are 2 types of components in nesC:

- Modules: provide the implementations of one or more interfaces.

- Configurations: used to assemble other components together, connecting interfaces used by components to interfaces provided by others.

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Components

• Naming conventions are as follows:

CONFIGURATION

MODULE

COMPONENTS

INTERFACE

Makefile Only in main app

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File Types

CONFIGURATION

MODULE

TinyOS Lab: Lesson 01 – Basic Programming

© 2012 Manuel Fernández

Makefile NullAppC.nc NullC.nc

Configuration Module

Makefile:

COMPONENT=NullAppC

include $(MAKERULES)

Name of configuration file

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Basic program: NullC

NullApp.nc :

SPECIFICATION

IMPLEMENTATION

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Basic program: NullC

SPECIFICATION

IMPLEMENTATION

NullC.nc :

• Open terminal in the folder • Type:

make telosb

• Insert mote in USB port and type:

make telosb reinstall.1 bsl,/dev/ttyUSB0

Platform

MoteID USB port (type motelist to find which one it is

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How to compile

• Open terminal in the folder

• Type:

make telosb docs

• Check the created folders

Platform

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Fun Stuff

• Commonly used units:

• int is NOT used • bool is also used

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NesC variables

• An alternative to console programming is using a TinyOS plug-in for the Eclipse IDE. • In this IDE it is possible to compile and install programs in motes • We will use this IDE to speed up the lessons.

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Eclipse IDE

1. Interface Leds has commands to control the 3 leds on the mote. (led0, led1, led2). Try each of them and install them on the mote

2. Add a Timer to blink the Leds periodically, showing a binary timer using the 3 leds.

3. Configure the User Button to do a complete routine with the Leds

4. Pack the previous subroutine in a new component with your own interface.

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Exercises

Contact Info: Manuel Fernández

manuel.fernandez@advanticsys.com

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