Having created the pipelined adder tree component, time to compare it with other implementations to see what value it adds.
VHDL
Adder Trees Pipelined Efficiently by Recursion
Amusing myself with recursive structures in HDL that are entirely synthesisable and optimal in both size and clock speed. This is primarily a hierarchical construction problem made interesting by having to copy with a non-balance tree.
FPGA
Notes on Fixing Hold Time Violations
Gathering advice on how to fix hold time violations with an emphasis on FPGA design.
VHDL
Comparison of ModelSim 'Signal Spies' and VHDL 'External Signals'
Example uses of ModelSim's Signal Spies and VHDL-2008's External Signals.
FPGA
Deriving AXI Crossbar Address Maps
Some tips and tricks for correctly decoding an AXI crossbar address map.
FPGA
Resilient Xilinx Vivado Licence Acquisition
Our design team has recently observed that Vivado has been struggling to get a licence later into long running compilations. These are some of the ideas I have developed to try and monitor the problem and make our compilations resilient to licence…
FPGA
Automating Code Review Design Checks in Vivado
Automating checks for transparent latches, asynchronous resets, no resets in Xilinx's Vivado synthesis tool.
FPGA
Visualising Clock Domain Crossings in Vivado
When picking up unfamiliar code with multiple clock domains, this visualisation technique can improve your understanding of which clocks drive each sequential primitive.
FPGA
Specifying Boundary Timing Constraints in Vivado
How to drive the XDC constraints file for input and output delays in Vivado. Some notes for something I keep needing to lookup.
