iio_writedev - write buffers on an IIO device
iio_writedev [ options ] [-n <hostname>] [-t
<trigger>] [-T <timeout-ms>] [-b <buffer-size>] [-s
<samples>] <iio_device> [<channel> ...]
iio_reg is a utility for writing buffers from connected IIO
devices.
- -h, --help
- Tells iio_readdev to display some help, and then quit. -n,
--network Use the network backend with the provided hostname
- -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_info -s
- serial:[port]
- local
- with no address part
- -S, --scan
- 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.
- -a, --auto
- Scan for available contexts and if only one is available use it.
- -c --cyclic
- Use cyclic buffer mode.
If the specified device is not found, a non-zero exit code is
returned.
You use iio_readdev in the same way you use many of the other
libiio utilities. You must specify a IIO device, and the specific channel to
read. Since this is a write, channels must be output. It is easy to use
iio_attr to find out what the channels are called.
This identifies the device, and channel that can be used.
iio_attr -a -o -c .
Using auto-detected IIO context at URI
"usb:3.10.5"
dev 'cf-ad9361-dds-core-lpc', channel 'voltage0' (output, index: 0, format:
le:S16/16>>0)
dev 'cf-ad9361-dds-core-lpc', channel 'voltage1' (output, index: 1, format:
le:S16/16>>0)
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
All bugs are tracked at:
https://github.com/analogdevicesinc/libiio/issues