C code needs to be compiled with headers an libraries on Red Pitaya
OS. Use the c/run.sh script to copy everything to the Red Pitaya
via ssh, compile there and execute.
Before running code use
bash run.sh IPADDR init
to load FPGA image for C API. Then you can run for example
bash run.sh IPADDR avoided_coupling_2channels.x
The output to stdout will be downloaded to output.txt.
By connecting the EXT_TRIG pins of multiple Red Pitayas to one the trigger signal of one leading Red Pitaya you can increase the number of channels available for signal capture, driving and delayed triggers.
This is automated in run-chain.sh which uploads, compiles and runs
the code on all Red Pitayas whose IPs are supplied. For example
bash run-chain.sh IPADDR1 IPADDR2 oscilloscope_gpio.x 0,10,10e-6
Note: The code is only uploaded and recompiled if it changed since
the last execution. The last execution is set as the modification
time of the run-chain.sh file. To force recompiling, e.g. because
the chain ordering or make target changed, touch any other source
file.
You may want to force recompilation after changing the order of devices in the chain, because already during compile time the leader (first device) and followers are set.
Just as run.sh the initialization (init; and also ping) is supported:
bash run-chain.sh IPADDR1 IPADDR2 init
Outputs are concatenated into output.gz to have all datasets as one.
Red Pitaya input channels are 1 and 2 for first RP in list of IPs, 3
and 4 for next and so on.
The pyqtgraph python package is required. First upload and compile
the RP script. In the c/ folder run
bash run.sh IPADDR init
bash run.sh IPADDR live-explorer.x
You can interrupt the script after successful compilation. Then in
live-explorer/ run
ssh root@IPADDR 'LD_LIBRARY_PATH=/opt/redpitaya/lib measurements/live-explorer.x' | python fftviewer.py 86e3 66e3
or to avoid having to enter the root password (which is root) use
sshpass:
sshpass -p root ssh -q -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null root@169.254.72.1 'LD_LIBRARY_PATH=/opt/redpitaya/lib measurements/live-explorer.x' | python fftviewer.py 86e3 66e3
In python-scpi/ directory run
python measure-two-point.py IPADDR