基于Simulink的树莓派编程

1 © 2013 The MathWorks, Inc. Raspberry Pi Programming using Simulink Brian McKay Technical Marketing Brian.McKay@mathworks.com 2 Agenda  Introduction to Raspberry Pi  Software Setup – Installation of Simulink Support Package for Raspberry Pi  Hardware Setup – Test that hardware is connected and working  Build and run model – Image Inversion  Examples – Object detection – Barcode reader  Wrap-up 3 Introduction to Raspberry Pi  What is it? – Credit-card sized, low-cost, single-board computer with audio and video input/output, designed for teaching  Who created it? – Raspberry Pi Foundation: http://www.raspberrypi.org/  What are the specs? – Broadcom® system-on-a-chip which includes an ARM®11 processor running at 700 MHz with 512 MB RAM – Peripheral connectivity for stereo audio and digital video (1080p) and supports USB and Ethernet. – It measures 85.6mm x 56mm x 21mm, with a little overlap for the SD card and connectors. It weighs 45g. Image from: http://www.raspberrypi.org/faqs “Overall real world performance is something like a 300MHz Pentium 2” 4 Introduction to Raspberry Pi  What’s the difference between Model A and Model B? – Model A has 256MB RAM, one USB port and no Ethernet (network connection). – Model B has 512MB RAM, 2 USB ports and an Ethernet port. – MathWorks only supports Raspberry Pi Model B  How much does it cost? – Approximately $35 US for the Raspberry Pi Model B – Cases, peripherals, and starter bundles are available  OK, where do I get one? – Premier Farnell/Element 14 and RS Components  For more info: http://www.raspberrypi.org/faqs 5 Software Setup  What software do I need? – MathWorks Software:  MATLAB and Simulink (including Student Version) Release R2013a, or later Note: Raspberry Pi support is available on 32-bit and 64-bit Microsoft Windows only – Compiler (for MathWorks software):  See Supported and Compatible Compilers http://www.mathworks.com/support/compilers/  For my 64-bit Windows 7 installation, I am using Microsoft Windows SDK 7.1 (available at no charge) – Simulink Support Package for Raspberry Pi Hardware 6 Simulink Support Package for Raspberry Pi Hardware  What is it? – A set of Simulink blocks that allow you to generate programs that run on a Raspberry Pi – It’s downloadable and it’s free!  Where do I get it? – Get from the MATLAB Toolstrip: Add-Ons  Get Hardware Support Packages – Get from the MATLAB Command Line: >> targetinstaller 7 Simulink Support Package for Raspberry Pi Hardware  Installation Process: – The Support Package Installer will lead you through the installation process and install all the software you need to run on a Raspberry Pi from Simulink Let’s go get it! 8  Support Package Installer installs all the software elements you need to connect to and run on a Raspberry Pi  Requires MathWorks Account Login – (but don’t worry if you don’t have one, you can create one when you get to the screen)  Firmware onto SD card – need to do this on the first installation Summary: Simulink Support Package for Raspberry Pi Hardware 9 Hardware Setup  What hardware do I need? – Raspberry Pi Model B – Power cable (Micro USB-B needed by Raspberry Pi)  Multiple options; I use USB-A to Micro USB-B cable for power – Ethernet cable – SD Card  MicroSD card that sockets into SD shell will also work – Open SD Card port (on host computer)  Need port to write firmware on SD Card / Micro SD card  Can use native port or USB-based device – Open Ethernet port (on host computer)  Option: Can use USB-Ethernet dongle – Case (nice to have) – USB Webcam (UVC compatible) 10 Hardware setup  Connect Raspberry Pi – Plug in USB Ethernet Adapter to PC, and Ethernet cable into adapter and Raspberry Pi – Plug USB webcam into Raspberry Pi – Insert SD card (which may be a carrier for SD micro) into Raspberry Pi – Attach USB power cable – USB A to PC, and USB micro B to power port on Raspberry Pi  Wait a minute for Raspberry Pi to boot Let’s go test it! 11 Summary: Simulink + Raspberry Pi Testing  Check for Support Package Installation – Simulink Support Package for Raspberry Pi Hardware should be in your Simulink Library – Can also type at MATLAB Command line: raspberrypilib  Test your connection (PC to Raspberry Pi) – Type at the MATLAB command line: !ping ip.add.re.ss – You should see the result: 12  Open Raspberry Pi Image Inversion model: raspberrypi_inversion  Click Tools -> Run on Target Hardware -> Options – Check to make sure Target hardware = Raspberry Pi. – Also check the IP address. Summary: Simulink + Raspberry Pi Testing (con’t)  Click Run button – We used the “External” simulation mode. – External mode allows you to tune parameters and monitor signals in the model while the application is running on hardware – You can use “Deploy to Hardware” button if you want to run on the hardware with no interaction from the host  The model is now running on the Raspberry Pi 13 Two Examples  Object Detection – Locate and mark the center of green object  Barcode scanner – Scan barcode and output numerical digits 14 Wrap-Up 15 Arduino Simulink Hardware Support Lego NXT BeagleBoard PandaBoard Gumstix Overo Available in Student Version! Raspberry Pi Selected Simulink Supported Target Hardware: • Raspberry Pi Model B ($40) • Arduino® Uno, Mega 2560, Nano, Ethernet Shield ($30-$70) • LEGO® MINDSTORMS® NXT ($280) • BeagleBoard-xM ($150) • PandaBoard ($180) • Gumstix® Overo hardware ($180) http://www.mathworks.com/hardware-support/home.html 16 © 2013 The MathWorks, Inc. MATLAB and Simulink are registered trademarks of The MathWorks, Inc. See www.mathworks.com/trademarks for a list of additional trademarks. Other product or brand names may be trademarks or registered trademarks of their respective holders. Additional Resources www.mathworks.com/academia www.mathworks.com/student_version