iio_attr(1)

NAME
iio_attr - list IIO devices, and read/write device attributes

SYNOPSIS
iio_attr [ options ] -d [device] [attr] [value]
iio_attr [ options ] -c [device] [channel] [attr] [value]
iio_attr [ options ] -D [device] [attr] [value]
iio_attr [ options ] -C [attr]
iio_attr [ options ] -f -d|-c|-B|-D [device] [channel] [attr] [path]
iio_attr -S <arg>
iio_attr -h

DESCRIPTION
iio_attr is a utility for displaying information about local or remote IIO devices. By providing an optional value, iio_attr will attempt to write the new value to the attribute.

COMMANDS

The iio_attr utility has a few main options, which control what the main utility of the application is.

-d, --device-attr
    Read and Write IIO device attributes

-c --channel-attr
    Read and Write IIO channel attributes

-B --buffer-attr
    Read and Write IIO Buffer attributes

-C --context-attr
    Read and Write IIO Context attributes

-D --debug-attr
    Read and Write IIO Debug attributes

-h, --help
    Tells iio_attr to display some help, and then quit.

-V, --version
    Prints the version information for this particular copy of iio_attr and the version of the libiio library it is using. This is useful for knowing if the version of the library and iio_attr on your system are up to date. This is also useful when reporting bugs.

-S, --scan [backends]
    Scan for available IIO contexts, optional arg of specific backend(s) 'ip', 'usb' or 'ip,usb'. Specific options for USB include Vendor ID, Product ID to limit scanning to specific devices 'usb=0456:b673'. vid,pid are hexadecimal numbers (no prefix needed), "*" (match any for pid only) If no argument is given, it checks all that are available.

OPTIONS

-u, --uri
    The Uniform Resource Identifier (uri) for connecting to devices, can be one of:

    ip:[address]
        network address, either numeric (192.168.0.1) or network hostname

    ip: blank, if compiled with zeroconf support, will find an IIO device on network

    usb:[device:port:instance]
        normally returned from iio_attr -S

    serial:[port],[baud],[settings]
        which are controlled, and need to match the iiod (or tinyiiod) on the other end of the serial port.

        [port]
            is something like '/dev/ttyUSB0' on Linux, and 'COM4' on Windows.

        [baud]
            is is normally one of 110, 300, 600, 1200, 2400, 4800, 9600, 14400, 19200, 38400, 57600, 115200 [default], 128000 or 256000, but can vary system to system.

        [settings]
            would normally be configured as '8n1' this is controlled by:

            data_bits:
                (5, 6, 7, 8 [default], or 9)

            parity_bits:
                ('n' none [default], 'o' odd, 'e' even, 'm' mark, or 's' space)

            stop_bits:
                (1 [default, or 2)

            flow_control:
                ('0' none [default], 'x' Xon Xoff, 'r' RTSCTS, or 'd' DTRDSR)

    local:
        with no address part.

-T, --timeout <arg>
    Context timeout in milliseconds. 0 = no timeout (wait forever). Default is 0.

-w, --write-only
    Do not readback on Writes

-i, --input-channel
    Filters channels by input channels only

-o, --output-channel
    Filters channels by output channels only

-s, --scan-channel
    Filters channels by scan channels only

-I, --ignore-case
    When pattern matching devices, channels or attributes, ignore case

-g, --generate-code <arg>
    Generate small C or python snippets that emulate what you are doing on the command line. Argument is a file name 'foo.c' or 'foo.py'

-f, --input-file
    Treat the trailing [value] argument as a path to a file. The file's raw bytes are written to the attribute via the _raw API variant, instead of writing [value] as a string. Cannot be combined with -C or --generate-code, and is rejected when used with wildcard matches. A short write (fewer bytes accepted than supplied) is reported as a WARNING on stderr.

RETURN VALUE
If the specified device is not found, a non-zero exit code is returned.

SEE ALSO
iio_attr(1), iio_info(1), iio_rwdev(1), iio_reg(1), libiio(3)

libiio home page: https://wiki.analog.com/resources/tools-software/linux-software/libiio

libiio code: https://github.com/analogdevicesinc/libiio

Doxygen for libiio https://analogdevicesinc.github.io/libiio/

BUGS
All bugs are tracked at: https://github.com/analogdevicesinc/libiio/issues