QoL features

[Mekboy-git068]

From my experience with the Sayodevice K66H3Mhz and GEON venom60HE, there are some features i think it's neat when having it.
Anyone who share the same idea with me can update the issues thread.

Can you considering these features:

• SOCD toggle: With in the same layer/profile, toggle on/off the SOCD (default FN+A on Sayodevice)
• Focus mode: Like Venom, with selected key, push higher scan rate within MCU limit for selected key, compromise by lower scan rate for other keys.
• Live Analog Graph within Debug tab: May helping debugging process.
• Live switching layer showcase: When tapping/holding MO(1), auto switch between layer according to the behavior of the key like in Sayodevice

[peppapighs]

Thank you for your suggestions. I will think about these features, and whether I want to include them or not. I also have some thoughts about the Focus mode below.

This is just my observation for Venom's Focus mode, so please take it with a grain of salt, but I believe Venom firmware is largely based on QMK. My current understanding of QMK is that a single matrix scan may send multiple USB packets, one per key press/release. Now, sending a USB packet is not free since you need to wait until the interface is ready (e.g. a maximum time of 0.125ms for an 8kHz keyboard). I'm not exactly sure about the original motivation of this architecture, but my guess is that it makes other features like Tap-Hold easier to implement. As a result, the "focused" keys benefit from the Focus mode since those keys now appear in the packets twice as many.

However, libhmk follows a different architecture, where a single matrix scan only sends a single USB packet with all the key presses/releases collated into this single packet to achieve the lowest latency. At the time of the writing, libhmk matrix scan is faster than 8kHz, and the actual bottleneck comes from the ADC scan, which is limited by the hardware. Although I cannot give you a concrete latency measurement, I claim that libhmk will not benefit from the Focus mode.