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FMCOMMS4 Rx to Tx loopback with /sys/bus/iio/devices...

Question asked by robertleeatad on May 16, 2017
Latest reply on May 17, 2017 by mhennerich

Is it possible to programmatically put the FMCOMMS4 into 'RF RX -> RF TX' loopback, by using the /sys/bus/iio/devices... filesystem?


I have a FMCOMMS4, attached to a Zedboard.  I have been working with the FMCOMMS4 programmatically by writing to and reading from the /sys/bus/iio/devices/... file system.  Being able to quickly try configurations just from the shell has been great.


However, now I'd like to put the board into 'RF RX -> RF TX' loop back.  With the bundled ADI IIO Oscilloscope app, this is available under the "FMCOMMs2/3/4/5 Advanced -> BIST -> Loopback" combo box.  However, It doesn't appear that the peer functionality is available under the .../devices file system.