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Introduction to Embedded Software
Practice #1 Kernel Sources, Raspberry Pi Board Setup
Dongkun Shin Embedded Software Laboratory
Sungkyunkwan University http://nyx.skku.ac.kr/
Introduction to Embedded Software SWE3027-41
Practice #1 2019-03-12
Introduction
• Schedule
- Tuesday, 15:00 ~ 16:15
- Room #400202 (Semiconductor Building)
• Course homepage
- http://www.icampus.ac.kr/
- Class materials will be posted on http://nyx.skku.ac.kr/
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Introduction to Embedded Software SWE3027-41
Practice #1 2019-03-12
TAs
• Contact
- Email: help.eslab@gmail.com
• Office Hours
- Mon/Fri, 19:00 ~ 21:45, Room #400309 (Semiconductor Building)
- You can visit the lab any time during office hours, but it is better to make an appointment in advance via email
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TA Email
Yunji Kang oso0931@gmail.com
Kwangbae Lee kblee1022@gmail.com
Sooyun Lee sooyun802@skku.edu
Hoseung Kim ghyutjik123@gmail.com
Introduction to Embedded Software SWE3027-41
Practice #1 2019-03-12
Practical Labs Schedule
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03/12 Kernel sources, Raspberry Pi board setup
03/19 Kernel configuration, Kernel building
04/02 Writing modules
04/16 Linux device model for an I2C driver
04/18 Communicate with the Nunchuk over I2C
05/07 Expose the Nunchuk functionality to user space
05/21 Minimal platform driver and access to I/O memory
05/28 Output-only serial port driver, Sleeping and handling interrupts in a device driver
06/04 Locking, Investigating kernel faults
06/24 Term project due date
Introduction to Embedded Software SWE3027-41
Practice #1 2019-03-12
Materials
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Raspberry Pi 3 Board B & Micro 5pin cable Micro SD card & Reader Arduino Uno
Odroid VU & Power cable & HDMI Nunchuk & Nunchuk adapter
Introduction to Embedded Software SWE3027-41
Practice #1 2019-03-12
Materials
• Host PC (Linux Environment)
- Virtual machine
- College of Software’s 4-Node Cluster Server
• Raspberry Pi 3 Board B
- MicroSD card, MicroSD-to-USB adaptor
- Micro 5pin cable
- HDMI cable, Monitor (Odroid View)
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Introduction to Embedded Software SWE3027-41
Practice #1 2019-03-12
Kernel Source Code• Install git packages
• Downloading kernel source code
- https://github.com/raspberrypi/linux
✓ Branch rpi-4.14.y
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$ git clone --depth=1 -b rpi-4.14.y https://github.com/raspberrypi/linux
$ sudo apt install git gitk git-email
$ git clone https://github.com/raspberrypi/linux $ git checkout rpi-4.14.y
Introduction to Embedded Software SWE3027-41
Practice #1 2019-03-12
Exploring the Kernel Source Code
• Exploring manually
- find command: used to search for files from the command line
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Introduction to Embedded Software SWE3027-41
Practice #1 2019-03-12
Exploring the Kernel Source Code
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- grep command: searches plain-text data sets for lines that match a regular expression
Introduction to Embedded Software SWE3027-41
Practice #1 2019-03-12
Exploring the Kernel Source Code
• Using kernel source indexing tools
- ctags
✓ Definition of a variable (e.g., a function, variable, or macro)
✓ Recognizes symbols in various files and connects them
- cscope
✓ Provides searching functionalities within a specific directory
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$ ctags -R
$ cscope -R
Introduction to Embedded Software SWE3027-41
Practice #1 2019-03-12
Exercise
1. Find the Linux logo image in the sources
2. Find who the maintainer of the MVNETA network driver is
3. Find the declaration of the platform_device_register() function
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Raspberry Pi Board Setup• Installing operating system images
- Download the imagehttps://www.raspberrypi.org/downloads/
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Introduction to Embedded Software SWE3027-41
Practice #1 2019-03-12
Raspberry Pi Board Setup• Writing an image to the SD card
- Download Etcher and install
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Raspbian Stretch Lite image
Introduction to Embedded Software SWE3027-41
Practice #1 2019-03-12
Raspberry Pi Board Setup• Setting interfacing options
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$ sudo raspi-config
piraspberry
User
pi
Password
raspberry
Introduction to Embedded Software SWE3027-41
Practice #1 2019-03-12
WiFi Setup• Search for an accessible peripheral wireless network
(AP, wireless router)
• Edit /etc/wpa_supplicant/wpa_supplicant.conf to configure the wireless network
- Copy the resulting contents of to /etc/wpa_supplicant/wpa_supplicant.conf
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$ sudo iwlist wlan0 scan
$ wpa_passphrase ssid password
$ sudo su $ wpa_passphrase ssid password
>> /etc/wpa_supplicant/wpa_supplicant.conf
Introduction to Embedded Software SWE3027-41
Practice #1 2019-03-12
Once your Raspberry Pi is connected to the Internet
Connecting via SSH
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LAN connection
WiFi connection
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Practice #1 2019-03-12
Hosts• swin.skku.edu
• swui.skku.edu
• swye.skku.edu
• swji.skku.edu
• How to connect?
- PuTTy
- SSH (Secure Shell)
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Introduction to Embedded Software SWE3027-41
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PuTTy• Remote access tool (SSH)
• https://www.chiark.greenend.org.uk/~sgtatham/putty/latest.html
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Introduction to Embedded Software SWE3027-41
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PuTTy
• Host Name (or IP address)
- student_id@swxx.skku.edu
• Port
- 1398
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Introduction to Embedded Software SWE3027-41
Practice #1 2019-03-12
PuTTy
• Initial password: your last name in English capital letters
- ex. 홍길동(Hong Gildong) → “HONG”
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Introduction to Embedded Software SWE3027-41
Practice #1 2019-03-12
File Transfer• WinSCP
- https://winscp.net/eng/download.php
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