error when sourcing the start.sh

[Jraviteer]

Description of the setup:

• Device: 125-14-z7020-LN
• SD card image: red-pitaya-alpine-3.14-armv7-20220322
• Application: pulsed-nmr
• Other relevant information:

Description of the problem:

Steps to reproduce the problem:

1. ssh to redpitaya using powershell
2. followe the code in the scressnshots

Hello, I was wondering if you could help me how to solve this error I'm getting?

This is the connection:

[pavel-demin]

I normally run start.sh scripts and do not source them, but I think sourcing them should also be OK.

This SD card image contains pre-built applications for the 125-14 Z7010 and 122-16 Z7020 boards. The applications on the SD card are not compatible with the 125-14 Z7020 board.

To run the pulsed NMR application on the 125-14 Z7020 board, the pulsed_nmr.bit file should be rebuilt using the following command:

make NAME=pulsed_nmr PART=xc7z020clg400-1 bit

The 125-14 Z7020 board seems to be a fairly recent model. I have never had one or tested my applications with it.

[Jraviteer]

Ah, I see. Thank you. In that case, I was wondering how you generated these Makefile and pulsed-nmr file in the image below? So, I can make my one own for the z7020!

[pavel-demin]

Normally, it should be enough to rebuild pulsed_nmr.bit using the source code corresponding to the version of the SD card image you are using: https://github.com/pavel-demin/red-pitaya-notes/releases/tag/20220322

There is no need to rebuild pulsed-nmr. It is compatible with Z7010 and Z7020 as they have the same CPU and only the FPGAs are different.

If you want to update pulsed-nmr.c to the latest version and rebuild pulsed-nmr, then the following commands can be used:

apk add gcc make
cd apps/pulsed_nmr
rw
curl -LO https://raw.githubusercontent.com/pavel-demin/red-pitaya-notes/master/projects/pulsed_nmr/server/pulsed-nmr.c
make clean
make
ro 

In this case, you will also need to rebuild pulsed_nmr.bit from the latest version of the source code using the following commands:

git clone https://github.com/pavel-demin/red-pitaya-notes
cd red-pitaya-notes
make NAME=pulsed_nmr PART=xc7z020clg400-1 bit

[Jraviteer]

Thank you! So, I have changed the c file and the bit file as you have advised, however, whenever I run this code: "sh start.sh" It is still giving this error and I have to reboot the red pitaya to be able to connect again. I don't really understand what 'mv10' is here.

[pavel-demin]

The 'mvl0' message is not related to this issue.

It still seems that you are using pulsed_nmr.bit incompatible with your board.

What happens is that when the start.sh script uses incompatible pulsed_nmr.bit to configure the FPGA, the FPGA is not configured correctly. When the pulsed-nmr program tries to communicate with the unconfigured FPGA, the system freezes.

[Jraviteer]

I changed it to z7020 through vivado and generated a bitstream, which I used to replace the original bit file in the SD image. Does that mean, there are additional things I have to do to make it work?

[pavel-demin]

I can build a custom SD card image for you with just the pulsed_nmr project and with the settings that I think should work. If you are OK with testing it, then I can send you a link later today or tomorrow.

[Jraviteer]

That would be amazing. I'm happy to test it, thank you :) Please note that I'm located in Australia and so my responses will be very irregular. Apologies for the inconvenience.

[pavel-demin]

Here is a link to an SD card image with the pulsed_nmr project built for xc7z020clg400-1:

https://www.dropbox.com/sh/5fy49wae6xwxa8a/AADjAc4-tZHnmz5A13EudYO_a/pulsed_nmr/red-pitaya-alpine-3.18-armv7-20230705-pulsed_nmr-z7020.zip?dl=1

It starts on the STEMlab 122.88-16 board that has the same FPGA without freezing the system.

The start.sh script runs automatically at boot time.

[Jraviteer]

So I have booted it into mine, and it hasn't kicked me out yet. So, I'm gonna assume that it's working. To run the c file, I have been running it on spyder but would you recommend running it on the alpine instead? And if so, can I ask what code to insert? Because the tutorial I followed from redpitaya main page did not work.

[pavel-demin]

Thank you for the test.

I am afraid that I do not understand the questions from your last comment.

If they are about the control program (pulsed_nmr.py), then it requires Python3, Matplotlib and PyQt5 or PySide2.

It is also possible to run the control program using the same Python environment used for the MCPHA and VNA projects. Download and unzip the release zip file. Copy pulsed_nmr.py and pulsed_nmr.ui to the control directory, then copy vna.exe to pulsed_nmr.exe.

Only pulsed_nmr.py does not do much. There is still a lot to do to make it useful.

[Jraviteer]

Ah yes, the control program. I apologize for confusing you. So, when I run the code from the client folder, this is what happens. I don't really know what I am doing wrong. The redpitaya is also connected to the computer.

[pavel-demin]

I would say that the IP address is not correct. It is also possible to use the mDNS hostname (rp-f0ae0b.local) in place of the IP address.

[Jraviteer]

Still no luck... Do you have any idea what could cause this?

[pavel-demin]

I do not understand the meaning of the first screenshot.

To me it still looks like a network connection issue between the computer you are running the client program on and the Red Pitaya board. Since I do not know anything about your network, I have no idea what it might be.

Can you connect from this computer to the board via SSH?

[Jraviteer]

Sorry, the first screenshot is just the IP address of the Red pitaya printed out with code 'arp -g' from powershell. The computer is connected to the wifi through a dongle and same with red pitayta. Lastly yes, I'm able to connect it via ssh. :((

[pavel-demin]

Have you tried using with the client program the same IP address that works for SSH?

Otherwise, I am afraid I cannot help you with this problem.

[Jraviteer]

Sorry, for the late reply! Now, it works fine. I have no clue, where the error came from but now the error is gone. Can I ask what you have changed in the setting for it to work?

[pavel-demin]

I am glad that it finally works for you. I did not change anything.