NAME

       iio_writedev - write buffers on an IIO device

SYNOPSIS

       iio_writedev  [ options ] [-t <trigger>] [-T <timeout-ms>] [-b <buffer-size>] [-s <samples>] <iio_device>
       [<channel> ...]

DESCRIPTION

       iio_reg is a utility for writing buffers from connected IIO devices.

OPTIONS

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

       -V, --version
              Prints the version information for this particular copy of iio_writedev and  the  version  of  the
              libiio  library  it  is  using.  This  is  useful  for  knowing  if the version of the library and
              iio_writedev 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.

       -t --trigger
              Use the specified trigger, if needed on the specified channel

       -b --buffer-size
              Size of the capture buffer. Default is 256.

       -s --samples
              Number of samples (not bytes) to capture, 0 = infinite. Default is 0.

       -T --timeout
              Buffer timeout in milliseconds. 0 = no timeout. Default is 0.

       -c --cyclic
              Use cyclic buffer mode.

       -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_writedev -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.

RETURN VALUE

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

USAGE

       You use iio_writedev in the same way you use many of the other libiio utilities.  You  should  specify  a
       IIO  device,  and  the  specific channel to write. Since this is a write, channels must be output.  If no
       channel is provided, iio_writedev will  write  to  all  output  channels.   If  no  device  is  provided,
       iio_writedev will print a few examples:
              iio_writedev -a
              Using auto-detected IIO context at URI "usb:3.10.5"
              Example : iio_writedev -u usb:3.10.5 -b 256 -s 1024 cf-ad9361-dds-core-lpc voltage0
              Example : iio_writedev -u usb:3.10.5 -b 256 -s 1024 cf-ad9361-dds-core-lpc voltage1
              Example : iio_writedev -u usb:3.10.5 -b 256 -s 1024 cf-ad9361-dds-core-lpc voltage2
              Example : iio_writedev -u usb:3.10.5 -b 256 -s 1024 cf-ad9361-dds-core-lpc voltage3
              Example : iio_writedev -u usb:3.10.5 -b 256 -s 1024 cf-ad9361-dds-core-lpc

       This sends 1024 samples of I and Q data to the USB attached AD9361. data is taking from standard in, in a
       binary format.
              iio_writedev -a -s 1024 cf-ad9361-dds-core-lpc voltage0 voltage1 < ./samples.dat

SEE ALSO

       iio_attr(1), iio_info(1), iio_readdev(1), iio_reg(1), iio_writedev(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

libiio-0.26                                      27 January 2025                                 iio_writedev(1)