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VHDLwhiz’s courses, articles, and resources help you learn and understand advanced concepts within FPGA design.



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Foreign Language Interface

Resource item: Foreign Language Interface

Learn to integrate any software into your VHDL testbenches.

In VHDL, a ‘foreign attribute lets you map a subprogram to a non-VHDL program. Questa supports this feature with its Foreign Language Interface (FLI) API.

This demo project and video show how to call C functions from a VHDL testbench and visualize testbench coverage in real time while the simulation runs using a Python GUI.

Click here to read more and join the membership!

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Tools used:


Intel Quartus

Xilinx Vivado

Lattice iCEcube2

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Free articles for FPGA designers using VHDL

Basic VHDL quiz - All questions

Basic VHDL quiz

Posted on
Have fun and learn from this VHDL and FPGA design quiz with 28 questions for beginners and intermediate learners in random order. All questions include an explanation for the correct answer…
Read more Basic VHDL quiz