This is my personal ZMK firmware configuration, based on urob's zmk-config.
Urob's readme contains a lot more details, and a great local build environment setup.
Only the totem keymap is current.
My keymap is based on HD Promethium, with a few changes.
- I (mostly) inverted the alphas on top and bottom rows, since I find bottom row more comfortable.
- F and V have not been swapped, to avoid scissors for vw (vim: visual word).
- P and W have not been swapped, to avoid scissors for dw (vim: delete word).
- X and J have also not been swapped, to keep the hjkl (vim: left down up right) keys in a logical order.
This does sadly eliminate the humorous FaPDeLuXe top row, but sacrifices had to be made for the sake of ergonomics.
I use urob's adaptive-key quite extensively in combination with dead keys (F21, F22, F23, F24) to produce some tweaked logic.
- This key produces DEAD1 (F21) when tapped once. if DEAD1 was the prior key (i.e. double tapped), it produces semicolon. If DEAD2 was the prior key, caps_word.
- This key produces DEAD2 (F22) when tapped once. if DEAD2 was the prior key (i.e. double tapped), it produces comma. If DEAD1 was the prior key, caps_word.
Other keys react to these keys to provide capital letters. If space or enter are pressed, the symbol (semicolon or comma) is produced.
- This key is only produced when pressing enter or space after punctuation. It capitalizes the next letter.
- Originally I used sticky shift for this, but it would shift symbols as well. dot space dot would produce ". :"
Left thumb 3 is a key-repeat for the pinky alphas, except V.
- This eliminates the awkward same finger bigrams of ss and cc that occur quite often in English. However, it leaves us with another problem with ssr (ex: classroom, crossroads) and ccr (ex: accrue, accredit), which now require two presses of the left thumb on two different keys.
- This is solved by sending a special dead key after the key-repeat, which can be consumed by another key repeat, producing r. Thus, s repeat repeat produces ssr, and c repeat repeat produces ccr.
- The key also cancels caps_word when not used as a repeat key.
