It seems the Arduino IDE picks the position of the first definition to
insert all auto-generated forward declarations. This fails to compile if
any of these generated forward declarations references a type included
later.
So, reorder the code a bit so the first definition happens strictly after
the last inclusion.
Also, make print_FatalError(*) independent from print_Error(*).
Also, factorise common parts of print_Error(*).
Frees 2336 bytes of program space and 5 bytes of global ram space.
IMPORTANT: with this change, the Adafruit clock generator becomes a hard
requirement to read and write gamecart eeproms.
This is a large patch, partly because JoyBus is used a lot:
- controller
- controller pak
- gamecart eeprom
and partly because of the further simplifications it allows.
Also, implement low-level bit shift functions in assembly in order to get
complete control of the timings: there can be just a few cycles of slack.
Also, use the time waiting for the input line to go high to pack received
bits into bytes on-the-fly, as there is now plenty of time.
This saves about 2080 bytes of program space, and 369 bytes of global ram
space.
Tagged with noreturn so the compiler knows about the effect of
forceReset=true.
Ideally, print_Error should lose its forceReset argument so that:
- print_Error never resets
- print_FatalError always resets (and hosts the code doing so)
so the compiler is more accurately aware of the execution flow.
Mainly, this removes a lot of the logic from selectMapping by reusing the
copy already present in getMapping. As a result, selectMapping is not
expected to be accessed from outside this module anymore.
Also, this factorises several smaller chunks of code found throughout the
module.
Also, get rid of a few easy globals along the way.
Also, move a bit more of NES-specific initialisation and menu display to
the NES.ino module.
This saves about 1490 bytes of code.
In this codepath, there will be a second call just after displaying the
CRC, making this call redundant.
For completeness: In the alternate codepath, the next operation does a lot
of IO, so it makes sense to refresh the screen before printing the CRC.
