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pavel-demin / red-pitaya-notes

Notes on the Red Pitaya Open Source Instrument
http://pavel-demin.github.io/red-pitaya-notes/
MIT License
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Bitstream built from source always makes redpitata crashing #1035

Closed olc closed 2 years ago

olc commented 2 years ago

Description of the setup:

Description of the problem:

The red pitaya always crashes when using the sdr_transceiver_122_88 bitstream built by myself.

Steps to reproduce the problem:

  1. Install a development machine following the Development machine notes.
  2. Build the sdr_transceiver_122_88 bitstream from source following the instructions at SDR transceiver: 
    source /opt/Xilinx/Vitis/2020.2/settings64.sh
git clone https://github.com/pavel-demin/red-pitaya-notes
cd red-pitaya-notes
make NAME=sdr_transceiver_122_88 PART=xc7z020clg400-1 bit
  3. Make filesystem writable on the red-pitaya: rw
  4. Copy the generated bitstream to the red pitaya: 
    scp tmp/sdr_transceiver_122_88.bit root@192.168.1.33:/media/mmcblk0p1/apps/sdr_transceiver_122_88/
  5. Reprogram the FPGA with the new generated bitstream : cat sdr_transceiver_122_88.bit > /dev/xdevcfg
  6. Start the server on IN1 (after killing any previous one if present): ./sdr-transceiver 1 : the red-pitaya does immediatly crash (electrical reboot required).

Note that size of my generated bitstream is by far different from the size of the original one:

-rwxr-xr-x    1 root     root       1164168 Feb 13 16:34 sdr_transceiver_122_88.bit              # generated by myself
-rwxr-xr-x    1 root     root       2619572 Feb 13 13:34 sdr_transceiver_122_88.bit.origin   # original bitstream

Do you see what could be wrong?

Thanks in anticipation for any help!

pavel-demin commented 2 years ago

The file size is indeed wrong and I cannot reproduce the problem using the commands from the notes. I have just tried to rebuild sdr_transceiver_122_88.bit and its size is 2619572.

I think the smaller file size indicates that the part specified during the build was not xc7z020clg400-1.

I have just tried to build sdr_transceiver_122_88.bit with the following wrong command:

make NAME=sdr_transceiver_122_88 bit

The size of sdr_transceiver_122_88.bit in this case is 1164168. Looks like you are using the wrong command to build sdr_transceiver_122_88.bit.

So please check what command you are using to build sdr_transceiver_122_88.bit and try to use the following correct command: 

make NAME=sdr_transceiver_122_88 PART=xc7z020clg400-1 bit
olc commented 2 years ago

I have rm -rf tmp/* and then run the correct command again as you suggested and the magic happened: file size is now 2619572!

I should have done it earlier but I thought that deleting the .bit could be enough (the full rebuild takes more than 30 minutes on my setup).

Many thanks for your help, Pavel.