* fix CLI section links in the Summary
* fix heading in Pointing Device doc
* fix headings in PS/2 Mouse Support doc
* add explicit section ids to I2C Master Driver doc
* reformat GPIO Controls table
Much like the I2C Master Driver doc, I found this a bit less than ideal to read. (The table was actually wider than the space available for it.)
Reformatted so each GPIO function is an H3 heading, followed by a paragraph and a table of each architecture's old-style function.
* migrate changes from I2C Master Driver doc to Japanese translation
* add explicit anchors to I2C Master Driver docs
* fix code block language markers
The language markers are case-sensitive; using the wrong case means the syntax highlighting doesn't work.
Good: ```c
Bad: ```C
* restore Japanese I2C Master Driver doc to current master
Can't update the internal tracking references accurately until the changes to the English doc are committed to master.
* add explicit anchors to edited files
* change ChibiOS/ARM to ARM/ChibiOS
Because ARM/ATSAM is also a thing that exists.
* fix code block language markers again
Used the wrong markers in a few spots. Also these are apparently always supposed to be lowercase.
* add section anchors to cli.md
* restore table formatting on GPIO Control doc
* remove changes to _summary.md
Some values that can never, ever, change were held in local
variables, rather than in PROGMEM. Fixed.
Change "pressed" to a signed int so the test for < 0 makes
sense, and to avoid possible weird failure modes in the
case where a key release comes in when pressed is already
zero. (Shouldn't happen, sure, but computers are weird.)
A lot of things in process_steno had external linkage for no
particular reason. They've been marked static. Stuff still
builds.
Distinguish between currently-held keys and keys that have
been held, and expose these values through a nicely-named API
so other code could, say, check on the current set of steno
chording in order to make displays. Also in passing fix up the
"state" value having external linkage so it could clash with
other people's variable declarations.
The API also provides hooks for key processing and steno chord
events, so you can monitor those events without having to
run in matrix_scan_user and recheck the values directly. Also
document these.
There is no path through processing a key that doesn't
end with a return false, so the nested return foo() are
gone and we just return false.
