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GNU/Linux Rapid Embedded Programming

You're reading from  GNU/Linux Rapid Embedded Programming

Product type Book
Published in Mar 2017
Publisher Packt
ISBN-13 9781786461803
Pages 732 pages
Edition 1st Edition
Languages
Concepts
Author (1):
Rodolfo Giometti Rodolfo Giometti
Profile icon Rodolfo Giometti
LinkedIn
Rodolfo Giometti is an engineer, IT specialist, GNU/Linux expert and software libre evangelist. He is the author of the books BeagleBone Essentials, BeagleBone Home Automation Blueprints and GNU/Linux Rapid Embedded Programming by Packt Publishing and maintainer of the LinuxPPS projects. He still actively contributes to the Linux source code with several patches and new device drivers for industrial applications devices. During his 20+ years of experience, he has worked on the x86, ARM, MIPS, and PowerPC-based platforms. Now, he is the co-chief at HCE Engineering S.r.l., where he designs new hardware and software systems for the quick prototyping in industry environment, control automation, and remote monitoring.
See other products by Rodolfo Giometti

Table of Contents (26) Chapters

GNU/Linux Rapid Embedded Programming
Credits
About the Author
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface
Installing the Developing System Managing the System Console C Compiler, Device Drivers, and Useful Developing Techniques Quick Programming with Scripts and System Daemons Setting Up an Embedded OS General Purposes Input Output signals – GPIO Serial Ports and TTY Devices - TTY Universal Serial Bus - USB Inter-Integrated Circuits - I2C Serial Peripheral Interface - SPI 1-Wire - W1 Ethernet Network Device - ETH Wireless Network Device - WLAN Controller Area Network - CAN Sound Devices - SND Video devices - V4L Analog-to-Digital Converters - ADC Pulse-Width Modulation - PWM Miscellaneous Devices

The CAN bus in Linux

As seen earlier, every CAN controller is represented in the system as a network device, and it can be listed as any other Ethernet or Wi-Fi device using the ifconfig command (or equivalent). The reason is that a CAN bus is just a network of several machines that are able to talk to each other into a LAN.

So, as we already saw earlier, we can use all networking commands on these devices. Here are two examples using both ifconfig and ip commands:

root@a5d3:~# ifconfig can0
can0      Link encap:UNSPEC  HWaddr 00-00-00-00-00-00-00-00-00-00-00
          NOARP  MTU:16  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:10
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
          Interrupt:50
root@a5d3:~# ip link show can0
2: can0: <NOARP,ECHO> mtu 16 qdisc noop state DOWN mode
DEFAULT group default qlen 10
    link/can

In particular, using the ip command...

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Authors (1)

Profile icon Rodolfo Giometti
LinkedIn
Rodolfo Giometti is an engineer, IT specialist, GNU/Linux expert and software libre evangelist. He is the author of the books BeagleBone Essentials, BeagleBone Home Automation Blueprints and GNU/Linux Rapid Embedded Programming by Packt Publishing and maintainer of the LinuxPPS projects. He still actively contributes to the Linux source code with several patches and new device drivers for industrial applications devices. During his 20+ years of experience, he has worked on the x86, ARM, MIPS, and PowerPC-based platforms. Now, he is the co-chief at HCE Engineering S.r.l., where he designs new hardware and software systems for the quick prototyping in industry environment, control automation, and remote monitoring.
Read more
See other products by Rodolfo Giometti

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