VHDL
VHDL appears to be a shrinking market, but its static type checking is great for catching errors.
Debugging circuits is so hard, anything one can do to help makes sense.
I remember asking all of my provessors the same question. Which do they prefer: Verilog or VHDL? Nobody stood up for VHDL.
The high speed frme buffers on the ULX4M are all in VHDL. GPL License.
ECP5 DVI I/O can be found In the examples directory for the popular ULX3M board. There is VHDL code for DVI out, with a Verilog wrapper. DVI out supports 24 bit 1920*1080 frames @30 FPS. The design uses the I/O blocks which were designed for controlling DDR memory using a clock source from the FPGA.
FPGA-LCD-Driver fork by Gohran Mahovlic is a VHDL library for GateMate which uses an LVDS signal to drive a TFT LCD display with a test pattern.
VHDLproc. View
VHDLproc is a simple command line VHDL preprocessor written in Python following the conditional compilation directives outlined in VHDL-2019, with a few extensions.
Pile of Cores. View
An Apache licensed VHDL library.
PoC - “Pile of Cores” provides implementations for often required hardware functions such as Arithmetic Units, Caches, Clock-Domain-Crossing Circuits, FIFOs, RAM wrappers, and I/O Controllers. The hardware modules are typically provided as VHDL or Verilog source code, so it can be easily re-used in a variety of hardware designs.
All hardware modules use a common set of VHDL packages to share new VHDL types, sub-programs and constants. Additionally, a set of simulation helper packages eases the writing of testbenches. Because PoC hosts a huge amount of IP cores, all cores are grouped into sub-namespaces to build a clear hierachy.
Various simulation and synthesis tool chains are supported to interoperate with PoC. To generalize all supported free and commercial vendor tool chains, PoC is shipped with a Python based infrastructure to offer a command line based frontend.
Open Source VHDL Group . View
Open Source VHDL Group is a GitHub Organization which hosts multiple recommended VHDL libraries.
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