This version (08 Oct 2021 21:43) was approved by Robin Getz.The Previously approved version (02 Oct 2018 11:01) is available.
Table of Contents
iio_reg
iio_reg is part of the Libiio package, a library that has been developed to ease the development of software interfacing Linux Industrial I/O (IIO) devices. There are four main userspace helper/utilities:
- iio_attr : read and write IIO attributes
- iio_info : dump the IIO attributes
- iio_readdev : read an IIO buffer device
- iio_writedev : write an IIO buffer device
- iio_reg : read or write SPI or I2C registers in an IIO device (useful to debug drivers)
analog@imhotep:~$ iio_reg -h Usage: iio_reg <device> <register> [<value>]
Running Remote
The iio_reg application can also connect to a libiio remote device via IP.
Prior in running iio_reg set the IIOD_REMOTE environmental variable.
This specifies any shell prompt running on the host or target
> export IIOD_REMOTE=IP address of the remote platform
Finding
An IIO context can have multiple logical devices, and sometimes not all devices will have a specific register interface. To find out which IIO device support register access, try (remember that iio_attr supports a -D option to look for debug attributes).
# iio_attr -u ip:192.168.2.1 -D IIO context has 4 devices: iio:device0, ad9361-phy: found 179 debug attributes iio:device1, xadc: found 0 debug attributes iio:device2, cf-ad9361-dds-core-lpc: found 1 debug attributes iio:device3, cf-ad9361-lpc: found 2 debug attributes # iio_attr -u ip:192.168.2.1 -D . direct_reg_access dev 'ad9361-phy', debug attr 'direct_reg_access', value :'0x0' dev 'cf-ad9361-dds-core-lpc', debug attr 'direct_reg_access', value :'0x90162' dev 'cf-ad9361-lpc', debug attr 'direct_reg_access', value :'0x0'
From here you can see the three different devices that support the iio_reg tool.
Example
# iio_reg ad9361-phy 0x3 0x5c
resources/tools-software/linux-software/libiio/iio_reg.txt · Last modified: 08 Oct 2021 21:43 by Robin Getz