Introduction to .NET Micro Framework Development

Introduction to .NET Micro Framework Christopher Fairbairn ARANZ Medical Ltd [email_address]

The Device Landscape Windows Mobile, Pocket PC, SmartPhone, Windows CE Windows XP, Windows Vista, Windows XP Embedded Remote Controls , Wearable Devices, Auxiliary Displays Increasing functionality .NET Micro Framework .NET Compact Framework .NET Framework

Tahoe Development Board
35mm x 35mm processor module
4MB Flash, 8MB SDRAM
100Mhz ARM920T Processor
www.devicesolutions.net

.NET Micro Framework
Smart Personal Object Technology (SPOT)
.NET Runtime in 300KB
Supports X86, ARM7, ARM9, M68K

C# experience VS 2005 Standard Edition .NET Micro Framework SDK A real device .NET MF - Requirements

Porting the .NET MF native User Applications and Libraries BCL .NET WPF Comms … CLR Execution Engine Type System Garbage Collector Interop PAL Timers RAM IO … Application Layer Class Library Layer Runtime Component Layer Hardware Layer Processor and Peripherals HAL OS or Drivers Facilities managed

Compiling for the .NET MF
Supports CLS and CIL
C# only
No generics
Minimal assembly validation
Secure bootloader
C# Source .NET Assembly .NET Micro Framework Assembly Device C# Compiler Metadata Processor Deployment

Hello World
1974 Bell Laboratories memo by Brian Kernighan
main() { printf(“hello, world”); }

Hello World OutputPort led = new OutputPort(Meridian.Pins.GPIO5, true); while (true) { Thread.Sleep(5000); led.Write(!led.Read()); }

DEMO The development process

Group Project
Kitchen Timer
Push buttons
Tilt to pause
Logging

GPIO and Interrupts pin = new InterruptPort(Tahoe.Pins.SW9, true, Port.ResistorMode.PullUp, Port.InterruptMode.InterruptEdge); pin.OnInterrupt += Pin_OnInterrupt; pin = new InputPort(Tahoe.Pins.SW9, Port.ResistorMode.PullUp); bool state = pin.Read(); pin = new OutputPort(Tahoe.Pins.SW9, true, Port.ResistorMode.PullDown); pin.Write(true); InputPort OutputPort InterruptPort

.NET MF GUI Support
Improves with each release
Inspired by WPF

Drawing Primitives Bitmap bmp = new Bitmap(SystemMetrics.ScreenWidth, SystemMetrics.ScreenHeight); bmp.DrawRectangle( red, // outline colour 10, // outline thickness 20, 30, // x, y 40, 50, // width, height 0, // xCornerRadius 0, // yCornerRadius 0, 0, 0, 0, 0, 0, 0); bmp.Flush(); // copy bitmap to LCD

Drawing Primitives
Object Orientated
Scene description
No declarative markup (XAML)
Rectangle rect = new Rectangle(); rect.Width = 40; rect.Height = 50; rect.Fill = new SolidColorBrush(Color.Black); rect.Stroke = new Pen(Color.White, 10);

Creating Windows
Static Controls
Text, Bitmap
Content Controls
Border, ListBoxItem
Container Controls
Canvas, StackPanel, ScrollViewer
Bitmap Fonts

DEMO Creating the basic Kitchen Timer Application

Interfacing Custom Hardware
Direct hardware access considered “unsafe”
Managed interfaces
GPIO
Serial
I2C
SPI
More options for porting partners
PWM

Tahoe Accelerometer Module
Analogue Accelerometer chip
I 2 C based ADC
Managed Device Driver

Input Manager
Coordination of all input devices for WPF
Turns raw input into WPF events
Helper methods
Buttons.IsButtonUp(Button.Pause);

DEMO Adding tilt support

Weak References
A way to alter GC behavior
Useful for implementing caches

Weak References
A way to alter GC behavior
Useful for implementing caches
WeakReference wr = new WeakReference(new SomeClass()); SomeClass foo = wr.Target as SomeClass; if (foo == null) foo = new SomeClass();

Extended Weak References
Persists objects to EEPROM
Can recover objects after device restarts
SurviveBoot
SurvivePowerDown
Storage Priorities

DEMO Creating a log of Kitchen Timer usage

bansky.net/blog
www.microframework.cz
.NET Micro Framework Team Blog
microsoft.public.dotnet.framework.microframework
Getting Started

Contact Information Christopher Fairbairn ARANZ Medical Ltd Questions? Email: [email_address] Website: www.christec.co.nz/blog/

http://www.christec.co.nz	288
http://christec.co.nz	13
http://www.slideshare.net	11
http://webcache.googleusercontent.com	1

Introduction to .NET Micro Framework Development

by christopherfairbairn on Jun 26, 2008

Accessibility

Categories

Tags

Upload Details

Usage Rights

4 Embeds 313

Statistics

Introduction to .NET Micro Framework Development — Presentation Transcript