Add support for crosses 5x3 qmk keyboard

[619frank]

Hello @manna-harbour ,

I recently got Crosses keyboard, here is the link to its repo https://github.com/Good-Great-Grand-Wonderful/qmk_firmware/tree/gggw/crosses/keyboards/gggw/crosses

Is it possible to add Miryoku QMK support for this?

It is a keyboard which has dual trackballs.

[619frank]

I tried adding this to custom_config.h, but it didn't compile.

#pragma once

#define LAYOUT_miryoku(\
K00,   K01,   K02,   K03,   K04,          K05,   K06,   K07,   K08,   K09,\
K10,   K11,   K12,   K13,   K14,          K15,   K16,   K17,   K18,   K19,\
K20,   K21,   K22,   K23,   K24,          K25,   K26,   K27,   K28,   K29,\
N30,   N31,   K32,   K33,   K34,          K35,   K36,   K37,   N38,   N39\
)\
LAYOUT_default(\
K00,   K01,   K02,   K03,   K04,          K05,   K06,   K07,   K08,   K09,\
K10,   K11,   K12,   K13,   K14,          K15,   K16,   K17,   K18,   K19,\
K20,   K21,   K22,   K23,   K24,          K25,   K26,   K27,   K28,   K29,\
              K32,   K33,   K34,          K35,   K36,   K37\
)

I'm getting this error

[manna-harbour]

As the layout is 3x5+3, there's 2 options to add support:

1. Update the keyboard definition to use the split_3x5_3 community layout, that is already supported by Miryoku QMK. Note that the QMK docs are out of date, and the process involves changing the layout macro name and declaring community layout support in keyboard.json. Ask on the QMK discord for details.
2. Add a mapping macro to keyboards/gggw/crosses/3x5/keymaps/manna-harbour_miryoku/. See some examples. What you have above looks correct for the contents of config.h. keymap.c needs to exist but can be empty.

Also note #287.

Since you have the mapping macro above, 2. might be easier than 1.