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SCSI Bus Capture

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akuker edited this page Oct 14, 2020 · 6 revisions

This page is intended for developers only. Its no use to anyone else.

Checkout and build scsimon

Right now, scsimon isn't included in the master branch. When #7 is fixed, this page should be updated. I'm assuming scsimon will be merged into master before that issue is closed.

cd ~
git clone https://github.com/akuker/RASCSI.git
cd ~/RASCSI
git checkout scsimon
cd ~/RASCSI/src/raspberrypi/
# If this is a new Raspberry Pi OS install, you'll need to run this command:
sudo apt install libspdlog-dev
make all

Special RaSCSI 1.5/1.6 modification

If you're using a RaSCSI version 1.5 or 1.6, you will need to make the following modification to your board. This will force all of the transceivers into a RECEIVE-ONLY mode.

Note: This tool hasn't been tested with RaSCSI board version 2.x.

Capture data

# TODO: I need to rename the executable to scsimon
sudo ./scsishark

Press CTRL-C when you're done capturing. You'll want to save the .VCD file.

Reviewing data

Install GTKWave and launch it

sudo apt install gtkwave
gtkwave&

Once GTKWave launches, open the .VCD file that was captured by scsimon.

  • First, double-click on the "logic" item in the Signal Search Tree (SST) frame.
  • Double-click each of the signals that show up below the SST frame. This will add them to the Wave panel.
  • Now, you should be able to see all of the data presented.

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