Hack2the future Microsoft .NET Gadgeteer

Teach computing withMicrosoft .NET Gadgeteer Lee Stott, Steven Johnston

.NET Gadgeteer is a new toolkit for quickly constructing,programming and shaping new small computing devices(gadgets)

History• .NET Gadgeteer comes from Microsoft Research in Cambridge, UK• Designed as a tool for researchers to make it faster and easier to prototype new kinds of devices• Since then, it has proven to be of interest to hobbyists and for secondary and tertiary education• Because of this interest, we have launched .NET Gadgeteer as open source software/hardware

The .NET Gadgeteer HardwareAt the heart of every Gadgeteer project is a mainboard.A mainboard is made up of a programmable processor, and anumber of sockets that Gadgeteer modules can plug into.

Modules, Modules, ModulesSensors, Actuators, Networking, User Input,Displays, Power, Extensibility, …

Today we are using theGHI Electronics FEZ Spider KitTouchscreen Display Camera Multicolor LED Button FEZ Spider Mainboard Joystick USB Host Ethernet SD Card USB Power Supply + Programming Interface

Connecting mainboards and modules: just match the lettersNote: The hardware will not be damaged if the wrong socket is used.

Red modules provide powerConnect only one red module

LETS BUILD A DIGITAL CAMERAFROM SCRATCH IN 30 MINUTES

Development Tool: Visual Studio or

Designer Tab Solution Explorer(Program.gadgeteer) (Project Files)

Code Tab(Program.cs)

Designer Tab (Program.gadgeteer)Toolbox

Module manufacturerand module type Module name

When clicking on a module’s socket, To connect the button to acompatible sockets on the mainboard compatible socket, click and dragare highlighted in green.

Now: please build a digital camera!FIRST use the designer to get it as belowand THEN build the hardware

VERY BRIEF INTRODUCTION TO C#

using System;using Microsoft.SPOT; The code starts with ausing Microsoft.SPOT.Presentation;using Microsoft.SPOT.Presentation.Controls; standard templateusing Microsoft.SPOT.Presentation.Media;using GT = Gadgeteer;using GTM = Gadgeteer.Modules;using Gadgeteer.Modules.GHIElectronics;namespace GadgeteerApp1{ public partial class Program { void ProgramStarted() { /****************************************************************************************** Access modules defined in the designer by typing their name: e.g. button camera1 Initialize event handlers here. e.g. button.ButtonPressed += new GTM.MSR.Button.ButtonEventHandler(button_ButtonPressed); ***************************************************************************************** */ // Do one-time tasks here Debug.Print("Program Started"); } }}

ProgramStarted() executes whenever the mainboard is firstnamespace GadgeteerApp1{ powered up or restarted. public partial class Program { void ProgramStarted() { /****************************************************************************************** Access modules defined in the designer by typing their name: e.g. button camera1 Initialize event handlers here. e.g. button.ButtonPressed += new GTM.MSR.Button.ButtonEventHandler(button_ButtonPressed); ***************************************************************************************** */ // Do one-time tasks here Debug.Print("Program Started"); } }}

namespace GadgeteerApp1{ public partial class Program { void ProgramStarted() { /****************************************************************************************** Access modules defined in the designer by typing their name: e.g. button camera1 Initialize event handlers here. e.g. button.ButtonPressed += new GTM.MSR.Button.ButtonEventHandler(button_ButtonPressed); ***************************************************************************************** */ // Do one-time tasks here Debug.Print("Program Started"); } }} Debug.Print(string) prints text to the debug output window.

To access hardware functionality type the nameof the hardware module followed by a periode.g. myButton.

PropertiesValues that can be read, and sometimes also assigned.

MethodsBuilt-in functions that can include a number of parameters.

EventsNotification that something of interest has occurred.

EventsNotification that something of interest has occurred. This line specifies that we are interested in knowing when this particular event occurs, and associates it with a specific method.

EventsNotification that something of interest has occurred.This method will now get called (and the code insideit will get executed) whenever the button is pressed.

The quick way to use eventsInside the ProgramStarted() method, type module name followedby a period, then select event using the arrow and Enter keys.

The quick way to use events Type +=, followed by the Tab key twice.

The quick way to use eventsReplace the line throw new NotImplementedException(); with your owncode.

SOFTWARE FOR A DIGITAL CAMERA

When the button is pressed, call thecamera.TakePicture() method.

When the camera has captured apicture, use the display’s SimpleGraphicsto display the image.

The DisplayImage method takes three parameters: aGT.Picture object, an X coordinate and a Y coordinate.The PicturedCaptured event returns a GT.Picture object,called picture, which is used as the first parameter.The coordinate 0, 0 (passed as the second and thirdparameters) refers top-left corner of the display.

Completed program (comments removed)Now: Please write your program!

RUNNING THE PROGRAM

Make sure that the mainboard isconnected to the PC, and that thepower LED is on.Click the button, or press theF5 Key to deploy the code to themainboard and start a debuggingsession.

After loading messages, output window should display Program Started,Note: If you can’t see the Output Window, press Ctrl+Alt+O

Click the button, or pressShift+F5 to exit the debuggingmode.Note that you can’t edit the codewhile in debugging mode.

If you see the following message in the output window,stop debugging (Shift+F5) and try again (F5):Updating display configuration. DEVICE WILL NOW REBOOT. Visual Studio might loseconnection, and debugging might need to be manually restarted.If the output window is stuck displaying the followingmessage, press the reset button on the mainboard:Rebooting...Now: Please program your cameras!

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Hack2the future Microsoft .NET Gadgeteer

by Lee Stott on Feb 11, 2012

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Hack2the future Microsoft .NET Gadgeteer — Presentation Transcript