In order for interrupt-based wake-ups (as introduced by #1142) to work concurrently with time.Sleep, we need to make some per-board changes.

Previously, sleepTicks (the function used as an interface between the scheduler and the hardware timer) was defined to block until the timer completed, since there was nothing else to do. Now we need to change this so that it bails out when an interrup

I was talking with Gabor about contributing with LVGL, and one of the points he was interested in was in writing unit and functional tests. I'm interested on contributing, as I use LVGL in some of my projects. If you'd like, we could discuss the following steps here.

Is your enhancement proposal related to a problem? Please describe.
Refer to: zephyrproject-rtos/zephyr#28932

Describe the solution you'd like
Refer to: zephyrproject-rtos/zephyr#28932 (comment)

Describe alternatives you've considered
NA

Additional context
NA

Resurrecting the second bullet from #1334

• Figure out how to fix favicon / logo more generally (here's a start https://github.com/tock/tock/tree/doc-updates)

On the FeatherS2, if code.py has wifi.radio.stop_scanning_networks() with no scan first, it causes the device to hang, stops showing up as CIRCUITPY, and there is no way to get the REPL. This is with MacOS and CircuitPython 6.0.0-rc.1. The board was purchased from Adafruit Nov 6, 2020.

See attached code:

[code-crash.py.zip](https://github.com/adafruit/circuitpython/files/5513427/code-crash.p

Implement some test cases for standard memset()

In PROTECTED mode, the MPU is used to map regions of memory to supervisor- and/or user-accessible memory. Currently, that algorithm is very simple: The entire address range is made accessible in supervisor mode; a single MPU region is used to enable user-mode access in each user memory region.

Each MPU region must bit both of a power-of-two size and with an alignment in memory equal to the si