EDA

• 2026-09-04 wdbcvt: reading Vivado’s undocumented .wdb waveform files #EDA#Vivado#FPGA

  As far as I’m aware, this is the first open source converter which reads Vivado WDB waveform format and converts to the open-source FST waveform format. Vivado’s xsim writes its waveforms to a .wdb file that normally …

• 2025-07-14 Mastering Resolved Signals in VHDL: A Comprehensive Guide for Digital Design #EDA#VHDL#FPGA

  I asked Gemini to teach me about the VHDL resolved signals. What you read below is the result. Mastering Resolved Signals in VHDL: A Comprehensive Guide for Digital Design 1. Introduction to Signals in VHDL The …

• 2025-07-07 How to shoot yourself in the foot with inout signals #EDA#VHDL#FPGA

  How to shoot yourself in the foot with inout signals They say that no good deed goes unpunished. Here’s an example of a footgun in VHDL which stems from in my view an eminently reasonable desire to keep the entity …

• 2025-06-29 VHDL IEEE Libraries and Numeric Type Conversion: A Definitive Reference #EDA#VHDL#FPGA

  I asked Gemini to teach me the VHDL type conversions. What you read below is the result. An annoying generated podcast will be available for a while. VHDL IEEE Libraries and Numeric Type Conversions: A Definitive …

• 2025-06-19 Packaging AMD Xilinx Vivado ML Standard edition 2025.1 in a Docker container #Xilinx#FPGA#Docker

  I updated the repository https://github.com/filmil/vivado-docker/ with the changes required to package Vivado 2025.1. As of this writing, version 2025.1 is the last published version. I hope that the updated version will …

• 2024-11-16 Using glbl.v module in a Verilog simulation in Vivado #FPGA#Vivado#Xilinx

  A quick note about correct use of glbl.v in a Verilog simulation in Vivado. This note is way less confusing than any notes you may find elsewhere on the Internet. glbl.v is a small collection of “global” signals that are …

• 2024-10-26 go-vcd-parser: a tested VCD parser and toolkit in Go #EDA#Verilog#VHDL

  go-vcd-parser reads Value Change Dump (VCD) files, the waveform format that simulators such as Verilator, Icarus Verilog and nvc write. The format is defined in IEEE 1800. The parser handles the 4-value format and the …

• 2024-10-05 From zero to RISC-V in hardware, in 6 minutes #FPGA#Bazel#Xilinx

  From zero to RISC-V in hardware, in 6 minutes Program your FPGA with a one-liner command. It’s a kind of magic. This is a project in sustainable FPGA development that I have been working on. It ties together several …

• 2024-09-03 bazel rules for GHDL #bazel#VHDL#EDA

  bazel rules for GHDL I present to you https://github.com/filmil/bazel_rules_ghdl: a set of bazel rules for converting VHDL into Verilog. This for example allows running VHDL code in a Verilator simulation. Commercial …

• 2024-07-08 Remote programming of an AMD (fka Xilinx) Artix-7 device #FPGA#Vivado#Xilinx

  Summary Here is how you can set up a hardware server (hw_server) in AMD Vivado 2023.2. Once you do this, that you can move your workbench to a virtual machine in your cloud of choice - mine is GCP - but program a device …

• 2023-11-20 Packaging AMD Xilinx Vivado ML Standard edition in a Docker container #Xilinx#FPGA#Docker

  A while back I wanted to make a hermetic environment for repeatably running Docker tooling. The results are here: https://github.com/filmil/vivado-docker/ At this time, it’s only able to run the GUI version of the tool. …