This week, I am aiming to get the HPS sub-system fully squared away. It turns out that there was a corruption in my flashing of a slightly more souped-up Linux system image to an SD card which rendered it unmountable and unbootable media.
Now, having caught this mistake, I can likely finish getting the keyboard to work natively without a relay by the end of the day.
I now aim to finalize the serial communication mechanisms for Waveshaper control and add a visualization output byte stream.
I performed the latency unit test. This was an end-to-end test of the entire I/O. I used real hardware with a trigger-mode oscilloscope.