[openXC7][openOCD] reading/writing to RAM32X1D LUTRAM via JTAG/BSCAN

by hro 5 months ago

GNU/Linux ◆ xterm-256color ◆ bash 772 views

This is proof of concept demonstrating LUTRAM validation over JTAG that will be helpful in validating experimental support for unsupported LUTRAMs in nextpnr-xilinx toolchain.

In this demo, I synthesize and implement the design using openXC7 toolchain, program the FPGA, and use custom openocd scripts to read and write from RAM32X1D LUTRAM.

The RAM32X1D under test has both of its address inputs connected together, but its two read ports are obtained separately. Hence, the 3 appearing in the read_lutram output after writing a 1.

More by hro

espresso_wifi uart log: restoring to stock 09:27

by hro 2 years ago

Holtek HT32 ISP Flashing Test (on Cooler Master Pro S RGB) from macOS 04:16

by hro 2 years ago

ht32-dfu-tool demo 02:57

by hro 1 year ago

Serial output of Galaxy Tab 2 7.0 with postmarketOS 01:26

by hro 2 years ago

See all

You can download this recording in asciicast v2 format, as a .cast file.

Download

Replay in terminal

You can replay the downloaded recording in your terminal using the asciinema play command:

asciinema play 664801.cast

If you don't have asciinema CLI installed then see installation instructions.

Use with stand-alone player on your website

Download asciinema player from the releases page (you only need .js and .css file), then use it like this:

<!DOCTYPE html>
<html>
<head>
  <link rel="stylesheet" type="text/css" href="asciinema-player.css" />
</head>
<body>
  <div id="player"></div>
  <script src="asciinema-player.min.js"></script>
  <script>
    AsciinemaPlayer.create(
      '/assets/664801.cast',
      document.getElementById('player'),
      { cols: 135, rows: 45 }
    );
  </script>
</body>
</html>

See asciinema player quick-start guide for full usage instructions.

While this site doesn't provide GIF conversion at the moment, you can still do it yourself with the help of asciinema GIF generator utility - agg.

Once you have it installed, generate a GIF with the following command:

agg https://asciinema.org/a/664801 demo.gif

Or, if you already downloaded the recording file:

agg demo.cast demo.gif

Check agg --help for all available options. You can change font family and size, select color theme, adjust speed and more.

See agg manual for full usage instructions.