Commands for controlling peripherals

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Dear Developer,
I am using the guide at the following internet address:

In the “Simple testing with can-utils” section I’m using the commands related to the can bus from the terminal.

Where can I find all the commands relating to the can bus and all the other peripherals?

Thank you in advance!
Best regards

2

Greetings!

For the can-utils package, the utils described in the project’s README.md are installed: can-utils/README.md at master · linux-can/can-utils · GitHub.

You can simply use the help command to list their usage using the -help option inside the example container itself, for example:

root@c082f79ad6b4:/home/torizon# candump -help
candump - dump CAN bus traffic.

Usage: candump [options] <CAN interface>+
  (use CTRL-C to terminate candump)

Options:
         -t <type>   (timestamp: (a)bsolute/(d)elta/(z)ero/(A)bsolute w date)
         -H          (read hardware timestamps instead of system timestamps)
         -c          (increment color mode level)
         -i          (binary output - may exceed 80 chars/line)
         -a          (enable additional ASCII output)
         -S          (swap byte order in printed CAN data[] - marked with '`' )
         -s <level>  (silent mode - 0: off (default) 1: animation 2: silent)
         -l          (log CAN-frames into file. Sets '-s 2' by default)
         -L          (use log file format on stdout)
         -n <count>  (terminate after reception of <count> CAN frames)
         -r <size>   (set socket receive buffer to <size>)
         -D          (Don't exit if a "detected" can device goes down.
         -d          (monitor dropped CAN frames)
         -e          (dump CAN error frames in human-readable format)
         -x          (print extra message infos, rx/tx brs esi)
         -T <msecs>  (terminate after <msecs> without any reception)

Up to 16 CAN interfaces with optional filter sets can be specified
on the commandline in the form: <ifname>[,filter]*

Filters:
  Comma separated filters can be specified for each given CAN interface:
    <can_id>:<can_mask>
         (matches when <received_can_id> & mask == can_id & mask)
    <can_id>~<can_mask>
         (matches when <received_can_id> & mask != can_id & mask)
    #<error_mask>
         (set error frame filter, see include/linux/can/error.h)
    [j|J]
         (join the given CAN filters - logical AND semantic)

CAN IDs, masks and data content are given and expected in hexadecimal values.
When the can_id is 8 digits long the CAN_EFF_FLAG is set for 29 bit EFF format.
Without any given filter all data frames are received ('0:0' default filter).

Use interface name 'any' to receive from all CAN interfaces.

Examples:
candump -c -c -ta can0,123:7FF,400:700,#000000FF can2,400~7F0 can3 can8

candump -l any,0~0,#FFFFFFFF
         (log only error frames but no(!) data frames)
candump -l any,0:0,#FFFFFFFF
         (log error frames and also all data frames)
candump vcan2,12345678:DFFFFFFF
         (match only for extended CAN ID 12345678)
candump vcan2,123:7FF
         (matches CAN ID 123 - including EFF and RTR frames)
candump vcan2,123:C00007FF
         (matches CAN ID 123 - only SFF and non-RTR frames)

and all the other peripherals

Do you have a particular peripheral you want to control/snoop? There exists a multitude of tools for each peripheral/use case.

Best regards,
Leon.

edit: I’ll tag this answer as solved regarding the original scope of the question, feel welcome to create another Topic or add a Post here if you have another question related to this.

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