Experience with the Use of Linux on a

Transcription

1 Manfred Lohöfener Contact Prof. Dr.-Ing. Manfred Lohöfener Hochschule Merseburg (FH) Mechatronic Systems Geusaer Straße D Merseburg Germany Phone +49-(0) , Fax , 16:40, Experience_Loh-1 Introduction Linux-PC File Server Fax Server Print Server Many Applications Several Distributions Debian, SuSE, Red Hat, Knoppix, Example (left) Easy Installation of SuSE-Linux with YaST , 16:40, Experience_Loh-2

2 Why Linux? Important Characteristics Overall stability of the operating system Availability also for embedded microcontrollers Scalability of the operating system Solutions for realtime applications Most of the software available for free First steps Use on desktop PC For office tasks (text, spread sheet, presentation, ) Example (left) Office suite OpenOffice with spread sheed , 16:40, Experience_Loh-3 Linux for Students Introducing to students Use in lessons for presentation and experiments Use in laboratory for program development First contact with Knoppix-CD on PC Install party with students , 16:40, Experience_Loh-4

3 Host Development Significance Informatics one of the three main columns of mechatronics Demand for broadening the informatics knowledge Example (left) Development of C-programs using KDevelop , 16:40, Experience_Loh-5 Control with PC PC as example for a microcontroller Use of the parallel printer port LPT LPT-adapter with 8 LEDs and 5 buttons (see picture) LPT-Port BA, Bit 0 7 D-Sub- Funktion Pin 2 9 Data Bit 0 7 (nicht rücklesbar) BA+1, Bit 3 15 Error BA+1, Bit 4 13 Select BA+1, Bit 5 12 Paper End BA+1, Bit 6 10 Ack (erzeugt Interrupt) BA+1, Bit 7 11 Busy (invertiert) Host Development (2) BA+2, Bit 0 1 Strobe (invertiert) BA+2, Bit 1 14 Auto Feed (invertiert) BA+2, Bit 2 16 Init BA+2, Bit 3 17 Select (invertiert) BA+2, Bit 4 BA+2, Bit 5 Masse Int (Interruptfreigabe) Dir (Daten auf Eingang) Ground (Masse) , 16:40, Experience_Loh-6

4 Embedded Linux Microcontroller DIL/NetPC with Intel 206 MHz SA StrongARM on an evaluation board Serial and Ethernet ports, TCP/IP stack, web server (HTTP, FTP) OS: Linux , 16:40, Experience_Loh-7 Student Project CAN-bus extension of the Evaluation board with a CAN-bus link Next stage: Use of the board as embedded controller with CAN-bus linked I/O devices , 16:40, Experience_Loh-8

5 Toshiba Topas Evaluation board Toshiba Topas LX Reference Board with 92MHz TX bit RISC processor Ports for touchscreen LCD display, keyboard, mouse, 10BaseT Ethernet and more , 16:40, Experience_Loh-9 Toshiba Topas (2) HMI Use for applications with HMI (human machine interface) Graphics capabilities of the LCD display with QT , 16:40, Experience_Loh-10

6 Automation with Open Source Modelling Open Source software for industrial automation projects Complete Open Source tool chain 1 st step: Model dynamical processes and control systems as block diagrams 2 nd step: Compile models to executable binaries 3 rd step: Use of a real time extension to Linux Example Build of block diagrams with Scilab/Scicos , 16:40, Experience_Loh-11 Visualization with Open Source Tools HMI and SCADA (Supervisory Control And Data Acquisition) , 16:40, Experience_Loh-12

7 Task Control Design System Modelling System Model Control Algorithm Concept e.g. Scilab/ Scicos RT- OS Microcontroller HMI- Design C-Code e.g. KDevelop Compiler Binary Boot Image e.g. JVisu Panel Configurator JVisu- Webserver Simulation HMI- Terminal Bus- Connection Process-I/O e.g. PC with Webbrowser e.g. Realtime- Ethernet e.g. RTAI-Linux System Mechatronic System , 16:40, Experience_Loh-13 Conclusion Expect an increasing importance of Open Source software not only on the desktop PC but also both on embedded control systems and in the development of solutions for automation and mechatronics. Thank you for your attention! Paper Presentation , 16:40, Experience_Loh-14

8 Walter, Klaus-Dieter: Messen, Steuern, Regeln mit LINUX Franzis-Verlag 2001 Schwebel, Robert: Embedded Linux. Handbuch für Entwickler mitp-verlag Bonn 2001 Töpfer, Hannes; Schröder, Christian: Dynamische, mechatronische Motorsteuerung. Echtzeit-Linux zur Ansteuerung hochdynamischer Direktantriebe Elektronik , 09, p. 86 ff Lohöfener, Manfred: Simulation of Discrete Systems and Control Circuits with Spreadsheet in Education in Mechatronics 3rd International Workshop on Research and Education in Mechatronics, September 26 and 27, 2002, Technical University of Denmark, Lyngby ~lohoefen/literatur/ref_lyngby_loh.pdf References Florian Goos CAN-Anbindung des DIL/NetPC-SK5 Starterkit mit StrongARM-Controller Studienarbeit, Fachhochschule Merseburg ~lohoefen/literatur/studienarbeit_goos_dnp.pdf David Dekert Praktikumsversuch mit dem Topas LX Board von Toshiba Studienarbeit, Fachhochschule Merseburg ~lohoefen/literatur/dekert_gr_stud_arb.pdf David Dekert Aufbau und Inbetriebnahme eines Linux-Echtzeit- Frameworks Studienarbeit, Fachhochschule Merseburg ~lohoefen/literatur/dekert_kl_stud_arb.pdf David Dekert Verteilte Prozessabbilder mit RTnet (Echtzeit Ethernet) Diplomarbeit, Fachhochschule Merseburg , 16:40, Experience_Loh-15 Links SUSE LINUX SUSE LINUX AG Nürnberg OpenOffice.org OpenOffice.org Organization The KDevelop-Project The KDevelop Team SBCs for Embedded Networking: The DIL/NetPC Family SSV Software Systems GmbH Hannover Scilab A Free Scientific Software Package The Scilab consortium JVisu web based machine visualisation Pengutronix e.k. Hildesheim RTAI - the Realtime Linux Application Interface for Linux The RTAI Developers' Team Knoppix-CD RTNet-Homepage (Realtime Ethernet) , 16:40, Experience_Loh-16