Raspberry Pi with Java
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The document discusses the Raspberry Pi, a small single-board computer developed in the UK for education purposes. Key details include its Broadcom SoC, 512MB of memory, HDMI and USB ports, and ability to run operating systems like Raspbian. The Raspberry Pi is useful for tasks like media centers, networking, programming, and running Minecraft. It also supports Java programming through tools like Pi4J, which provides examples of using the Raspberry Pi's GPIO pins to control devices.
Raspberry Pi with Java
- 2. Raspberry Pi with Java koji lin@twjug 2013/6/29
- 4. About Raspberry Pi ● A credit-card-sized single-board computer developed in the UK by the Raspberry Pi Foundation ● Eben Upton – Co-founder of the Raspberry Pi – Chip architect at Broadcom ● For education purpose – Promoting the teaching of basic computer science in schools
- 6. Raspberry PI Model B ● SoC Broadcom BCM2835 ● CPU – ARM 11/700MHZ (ARMv6) ● GPU – Broadcom VideoCore IV, OpenGL ES 2.0, 1080p30 h.264/MPEG- 4 AVC high-profile decoder
- 7. Raspberry PI ● Memory – 512MB ● IO – HDMI – 2 x USB – Ethernet – Header pins for GPIO, UART, SPI and I2C ● Power Only 3.5 W
- 8. Just $35
- 9. Attention ● Power supply is important ● SD card – Class 10 and > 4G ● If you use Linux dd, please double check your command
- 10. For ? ● A small computer – A bit slower.. ● Media center – Raspbmc – OpenELEC – Xbian
- 11. For ? ● A small computer – A bit slower.. ● Media center – Raspbmc – OpenELEC
- 12. For ? ● A small computer – A bit slower.. ● Media center – Raspbmc – OpenELEC ● NAS ● Wireless Access Point ● Programming ● Game
- 15. Pi Camera Module
- 16. Pi Camera Module
- 17. And More
- 18. Operating System ● Raspbian(Debian) “wheezy” ● Soft-float Debian “wheezy” – Ex: for Oracle JVM ● Arch Linux ARM ● Pidora ● RISC OS ● FreeBSD ● Android ● Firefox OS
- 19. New Out of Box Software
- 20. New Out of Box Software ● It's easy ● Copy to SD Card ● Will partition for you ● Give you the choice of OS ● Includes recovery partition
- 21. Programming ● Python as the educational language – Python 2.7.3 ● Any language can compile for ARMv6 ● The most interesting part is controlling GPIO
- 22. GPIO
- 23. Attention ● GPIO IN/OUT is 3.3v – Do not use voltage levels greater than 3.3V – Arduino is 5V ● Do not connect power supply to any other pin ● Be careful of static electricity
- 24. Java on PI ● Java SE Embedded – 32~64MB/37~46MB RAM/ROM – Java SE Embedded 7 (Soft float) – Java SE Embedded 8 + JavaFX (Hard float) ● Java ME Embedded – 8MB/5MB RAM/ROM – Java ME Embedded 3.3
- 25. Pi4J ● Provide a bridge between the native libraries and Java for full access to the Raspberry Pi
- 27. Pi4J Example1
- 29. Resistor Calculator ● Download them on Google Play & App Store
- 30. Pi4J Example2
- 32. Stepper Motor GPIO3 GPIO4 GPIO5 GPIO6 1 OFF ON ON ON 2 ON OFF ON ON 3 ON ON OFF ON 4 ON ON ON OFF
- 33. Pi4J Example3