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New in the VHDLwhiz Membership in September 2026
Coding challenge: CRC error detection in VHDL
Every Ethernet frame, USB packet, and SD card sector ends with a CRC (cyclic redundancy check), a few bits that reveal if the data was corrupted along the way. The algorithm is famous for sounding harder than it is: the math is called polynomial division, but the hardware is a shift register with a few XOR gates.
In this challenge, members implement the CRC algorithm in VHDL three times: one bit per clock cycle, one byte per clock cycle, and finally with pipeline stages. Self-checking testbenches give you a clear pass or fail, an interactive demo on the challenge page steps through the algorithm bit by bit, and my solution videos are there when you’re ready to compare notes.
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