my 4 bits on FPGA

Since the completion of the most complicated modular PCB module, the CLB, I have successfully assembled the surrounding interconnect PCBs. As it turns out, you can reflow solder PCBs on the stove in your kitchen. In unrelated news, does anybody have tips on how to get rid of unwanted smells... [Read More]

Yes, this is another blog post on the interwebz about the infamous skid buffer or AXI pipeline stages (in particular the tready path). One could think that something so essential to building AXI compliant IP is covered in detail everywhere you search. And yet, this particular IP took me longer... [Read More]

Fig 1: PCB before and after assembly and debugging. [Read More]

Fig 1: Top level diagram of a modular slice. [Read More]

Somewhere at my workplace we have this complex DSP design with many FIR filters and parallel processing taking place. It is a classic case of “historical growth” where some straight forward (non AXI) bus was implemented. This can work in single rate systems with a hardcoded sample rate and a... [Read More]