Raspberry Pi ppt.pptx
- 2. Raspberry Pi https://www.raspberrypi.org Raspberry Pi is a tiny (about 9x6cm), low-cost ($35+), single-board computer that supports embedded Linux operating systems The recommended Operating System is called Raspberry Pi OS (Linux based)
- 3. • The Raspberry Pi is a small computer that can do lots of things • It has a small footprint (about 9x6cm) and it is cheap ($35+) • You plug it into a monitor and attach a keyboard and mouse • It has so-called GPIO pins (General Purpose Input/Output) for connection sensors and other electronic components like LEDs, etc. • Raspberry Pi is as well suited for prototyping, datalogging and different electronics projects, a media center, etc. • It can be used to learn programming, IT and other technical skills, etc. • RP has limited power (CPU, RAM, etc.) so it cannot normally replace a desktop computer or laptop for ordinary use • The “Hardrive” is a Micro SD card Raspberry Pi https://www.raspberrypi.org
- 4. Raspberry Pi microSD Card (the Back ) GPIO Pins Power Supply (USB C) microHDMI x 2 Ethernet USB A x 4 Camera Connector https://www.raspberrypi.org
- 5. Getting Started with Raspberry Pi Hans-Petter Halvorsen https://www.halvorsen.blog Table of Contents
- 6. What Do You Need? Hans-Petter Halvorsen https://www.halvorsen.blog Table of Contents
- 7. • Raspberry Pi • Micro SD Card (+ Adapter) • Power Supply • microHDMI to HDMI Cable • Monitor • Mouse • Keyboard What Do You Need?
- 8. What Do You Need? https://www.raspberrypi.org USB C Power Supply 15W (5V, 3A) Keyboard Mouse Monitor (with HDMI) Raspberry Pi microHDMI to HDMI Cable Micro SD Card (+ Adapter) (8GB or more)
- 9. Raspberry Pi OS Hans-Petter Halvorsen https://www.halvorsen.blog Table of Contents
- 10. • In order make your Raspberry Pi up and running you need to install an Operating System (OS) • The OS for Raspberry Pi is called Raspberry Pi OS (previously known as Raspbian) • Raspberry Pi runs a version of an operating system called Linux (Windows and macOS are other operating systems). • To install the necessary OS, you need a microSD card • Then you use the Raspberry Pi Imager in order to download the OS to the microSD card https://www.raspberrypi.org/software/ Raspberry Pi OS
- 12. Start using Raspberry Pi • Put the microSD card into the Raspberry Pi • Connect Monitor, Mouse and Keyboard • Connect Power Supply • Follow the Instructions on Screen to setup Wi-Fi • etc. Raspberry Pi OS
- 13. Connect to Wi-Fi Network Don’t use the Eduroam WiFi network in your University • The first thing you typically need to do is to connect your Raspberry Pi to a Wi-Fi network. • Your home network normally works fine. If you are in a company or a university, you may get some trouble. • In these situations, you can configure a Mobile hotspot using your Windows 10/11 PC
- 14. Shut-down Raspberry Pi Select the Raspberry Pi icon in upper left corner and select “Logout”
- 15. The Linux Terminal Hans-Petter Halvorsen https://www.halvorsen.blog Table of Contents
- 16. The Terminal
- 17. • The Raspberry Pi OS is a Linux based OS and comes with a GUI with limited features, so very often you need to type “low-level” commands using the Terminal • The Linux terminal is a powerful tool for “low- level” operations on the OS The Terminal https://www.raspberrypi.org/documentation/usage/terminal/
- 18. Update Raspberry Pi OS • Run the following commands in the Terminal window: • First run the following: sudo apt update • Then: sudo apt full-upgrade https://www.raspberrypi.org/documentation/raspbian/updating.md
- 19. • sudo is a program for Unix-like computer operating systems (like Linux) that allows users to run programs with the security privileges of another user, by default the superuser • It originally stood for "superuser do” • Some commands that make permanent changes to the state of your system require you to have root privileges to run. • The command sudo temporarily gives your account (if you're not already logged in as root) the ability to run these commands • You typically use it in your Terminal window for installing/upgrading software, etc. https://www.raspberrypi.org/documentation/linux/ sudo
- 20. • Unlike your other electronic devices, Raspberry Pi doesn’t come with an “off” switch. • You should not just “pull out the plug“ • Enter the following in the Terminal: sudo poweroff • This will give you a clean shutdown. After that, you can unplug the computer. • How to turn on Raspberry Pi after shutdown? It’s simple. Just plug it in. https://www.proqsolutions.com/shutting-down-your-raspberry-pi/ How to Power off your RP Or use the Graphical Interface:
- 21. Tools Hans-Petter Halvorsen https://www.halvorsen.blog Table of Contents
- 22. • Scrot is a built-in tool for Screen Capture • Scrot is a Command-line tool with no GUI • Hit “Print Screen” key and the image will be saved in the “/home/pi” folder Scrot
- 23. • Gnome Screenshot is better than “Scrot” since it has a desktop GUI • You need to install it (the Terminal): sudo apt update && sudo apt upgrade sudo apt install gnome-screenshot • It will then appear in Menu > Accessories > Screenshot https://magpi.raspberrypi.org/articles/take-screenshots-raspberry-pi Gnome Screenshot
- 24. Remote Access Hans-Petter Halvorsen https://www.halvorsen.blog Table of Contents
- 25. Typically, you want to have Remote Access to you Raspberry Pi from your ordinary Desktop Computer. Different options: • SSH – Command Line Access Or use some kind of Remote Desktop software: • XRDP/RDC • TeamViewer • VNC Remote Access
- 26. Raspberry Pi and Python Programming Hans-Petter Halvorsen https://www.halvorsen.blog Table of Contents
- 27. Python with Raspberry Pi • Python is a fairly old Programming Language (1991) compared to many other Programming Languages like C# (2000), Swift (2014), Java (1995), PHP (1995). • Python has during the last 10 years become more and more popular. • Today, Python has become one of the most popular Programming Languages. • The Raspberry Pi OS comes with a basic Python Editor called “Thonny“ https://www.raspberrypi.org/documentation/usage/python/
- 28. • The Raspberry Pi OS comes with a basic Python Editor called Thonny Python with Raspberry Pi https://www.raspberrypi.org/documentation/usage/python/ But you can install and use other Python Editors if you prefer
- 29. Hello World
- 30. GPIO Hans-Petter Halvorsen https://www.halvorsen.blog Table of Contents
- 31. GPIO Raspberry Pi is as well suited for prototyping, datalogging and different electronics projects using the GPIO Pins
- 32. The GPIO pins are Digital Pins which are either True (+3.3V) or False (0V). These can be used to turn on/off LEDs, etc. In addition, some of the pins also offer some other Features: • PWM (Pulse Width Modulation) Digital Buses (for reading data from Sensors, etc.): • SPI • I2C GPIO Features
- 33. GPIO with Python Hans-Petter Halvorsen https://www.halvorsen.blog Table of Contents
- 34. GPIO with Python • You can make all kinds of Python program on your Raspberry Pi • But you could have used your ordinary desktop/laptop PC for that • The UNIQUE thing with Raspberry Pi compared to an ordinary PC is the GPIO connector • With GPIO you can connect LEDs, Sensors, control Motors, etc. • You typically use Python in order communicate with GPIO connector • That what's makes the combination Raspberry Pi + Python UNIQUE!
- 35. • The GPIO Zero Python Library can be used to communicate with GPIO Pins • The GPIO Zero Python Library comes preinstalled with the Raspberry Pi OS Resources: • https://www.raspberrypi.org/documentation/usage/gpio/pytho n/ • https://www.raspberrypi.org/documentation/hardware/raspber rypi/gpio/ • https://pypi.org/project/gpiozero/ • https://gpiozero.readthedocs.io/en/stable/ GPIO Zero
- 36. LED Example GPIO16 (Pin 36) GND (Pin 32) Raspberry Pi GPIO Pins Breadboard LED R=270Ω
- 37. LED Example from gpiozero import LED from time import sleep pin = 16 led = LED(pin) while True: led.on() sleep(1) led.off() sleep(1) https://www.raspberrypi.org/documentation/usage/gpio/python/ This Example “Runs for ever”
- 38. GPIO Features Hans-Petter Halvorsen https://www.halvorsen.blog Table of Contents
- 39. In addition to ordinary Digital Pins the Raspberry Pi GPIO connector has other Features as well: • PWM – Pulse Width Modulation • SPI – Serial Peripheral Interface • I2C – Inter-Integrated Circuit GPIO Features Communication Interfaces for connection different types of Sensors, etc.
- 40. PWM • We've seen how to turn an LED on and off, but how do we control its brightness levels? • An LED's brightness is determined by controlling the amount of current flowing through it, but that requires a lot more hardware components. • A simple trick we can do is to flash the LED faster than the eye can see! • By controlling the amount of time the LED is on versus off, we can change its perceived brightness. • This is known as Pulse Width Modulation (PWM).
- 41. • SPI is an interface to communicate with different types of electronic components like Sensors, Analog to Digital Converts (ADC), etc. that supports the SPI interface • Thousands of different Components and Sensors supports the SPI interface https://www.raspberrypi.org/documentation/hardware/raspberrypi/spi/ SPI
- 42. • I2C is another interface to communicate with different types of electronic components like Sensors, Analog to Digital Converts (ADC), etc. that supports the SPI interface • Thousands of different Components and Sensors supports the I2C interface I2C
- 43. Raspberry Pi with MATLAB Hans-Petter Halvorsen https://www.halvorsen.blog Table of Contents
- 44. MATLAB Support Package for Raspberry Pi Getting Started with MATLAB Support Package for Raspberry Pi: https://youtu.be/32ByiUdOwsw
- 45. Test Hardware
- 48. Blinking LED Example clear clc r = for raspi; i = 1:10 disp(i); writeLED(r, "LED0", 0); pause(0.5); writeLED(r, "LED0", 1) pause(0.5); end writeLED(r, "LED0", 1); We use the following Function:
- 49. Blinking LED GPIO Example
- 50. Blinking LED GPIO Example clear rpi rpi = raspi(); gpiopin = 16 ledvalue = 1; writeDigitalPin(rpi, gpiopin, ledvalue); for i = 1:10 ledvalue = 1; writeDigitalPin(rpi, gpiopin, ledvalue); pause(0.5); ledvalue = 0; writeDigitalPin(rpi, gpiopin, ledvalue); pause(0.5); end