There are too many ways in which it is possible to mess up clock domain crossings in digital electronics. This post explores Xilinx's report_cdc TCL command and how well it recognises some of the risks you may have missed.
VHDL
Working With AXI Streaming Data
Beyond using Xilinx IP cores to work with AXI streaming data, one will always need to eventually write custom VHDL code. I've personally found working with AXI awkward and so I've put together some techniques.
FPGA
Verification of Clock Domain Crossing Timing Constraints and Exceptions
Applying timing exceptions for synchronising registers when crossing clock domains, and verifying the exceptions have been correctly applied and others have not been missed.
Bash
Using Certbot To Generate Certificates Without SSH Access
Let's Encrypt and Certbot provide ways to automate the maintenance of free HTTPS certificates for your website, but only if your hosting service has included the cPanel plugin or gives you SSH access. We present a solution that we've used for…
VHDL
Radix-n Fast Fourier Transforms (Part 3)
FFTs are generally defined recursively, so how hard can it be to write a recursive VHDL implementation of an FFT that can scale to any number of inputs for any chosen radix?
VHDL
Radix-n Fast Fourier Transforms (Part 2)
FFTs are generally defined recursively, so how hard can it be to write a recursive VHDL implementation of an FFT that can scale to any number of inputs for any chosen radix?
VHDL
Radix-n Fast Fourier Transforms (Part 1)
FFTs are generally defined recursively, so how hard can it be to write a recursive VHDL implementation of an FFT that can scale to any number of inputs for any chosen radix?
VHDL
Compiling VHDL For The Missing Fixed And Floating Point Libraries
VHDL-2008 has added types sfixed, ufixed and float for fixed and floating point arithmetic, but you may struggle to use them with older tools. Here's how to fix that.
VHDL
FIR Filter Implementation Comparisons
Having created the pipelined adder tree component, time to compare it with other implementations to see what value it adds.
