d1feb8744a
"unselecting" left-hand rows is a wasted i2c transaction. On the left-hand side, the ergodox uses a GPIO expander. It does *not* change "direction" (input/output) of pins, it just sets pins high or low. But all the pins are written at once. There's no way to change just one pin's value; you send a full byte of all eight row pins. (Not all of them are in use, but that doesn't matter.) So every pin is either +V or ground. This is in contrast with the right-hand side, which is using input mode to make pins be neutral. So there's no need to "deselect" the rows on the left side at all. To select row 0, you set the GPIO register for the rows to 0xFE. The previous code would then set it back to 0xFF, then set it to 0xFD on the next cycle. But we can just omit the intervening step, and set it to 0xFD next cycle, and get the same results. And yes, I tested that the keyboard still works. On my system, scan rate as reported by DEBUG_SCAN_RATE goes from 445 or so to 579 or so, thus, from ~2.24ms to ~1.73ms. Signed-off-by: seebs <seebs@seebs.net> |
7 years ago | |
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.. | ||
keymaps | 7 years ago | |
util | 7 years ago | |
190hotfix.sh | 7 years ago | |
config.h | 7 years ago | |
ergodox_ez.c | 7 years ago | |
ergodox_ez.h | 7 years ago | |
i2cmaster.h | 7 years ago | |
matrix.c | 7 years ago | |
readme.md | 7 years ago | |
rules.mk | 7 years ago | |
twimaster.c | 7 years ago |
readme.md
ErgoDox EZ
The Ez uses the Teensy Loader.
Linux users need to modify udev rules as described on the Teensy
Linux page. Some distributions provide a binary, maybe called
teensy-loader-cli
.
To flash the firmware:
-
Build the firmware with
make keymapname
, for examplemake default
-
This will result in a hex file called
ergodox_ez_keymapname.hex
, e.g.ergodox_ez_default.hex
-
Start the teensy loader.
-
Load the .hex file into it.
-
Press the Reset button by inserting a paperclip gently into the reset hole in the top right corder.
-
Click the button in the Teensy app to download the firmware.
To flash with ´teensy-loader-cli´:
-
Build the firmware with
make keymapname
, for examplemake default
-
Run ´<path/to/>teensy_loader_cli -mmcu=atmega32u4 -w ergodox_ez_.hex´
-
Press the Reset button by inserting a paperclip gently into the reset hole in the top right corder.
Settings
You may want to enable QMK_KEYS_PER_SCAN because the Ergodox has a relatively slow scan rate.