3 The Ez uses the [Teensy Loader](https://www.pjrc.com/teensy/loader.html).
5 Linux users need to modify udev rules as described on the [Teensy
6 Linux page]. Some distributions provide a binary, maybe called
9 [Teensy Linux page]: https://www.pjrc.com/teensy/loader_linux.html
11 To flash the firmware:
13 - Build the firmware with `make <keyboardname>:<keymapname>`, for example `make ergodox_ez:default`
15 - This will result in a hex file called `ergodox_ez_keymapname.hex`, e.g.
16 `ergodox_ez_default.hex`
18 - Start the teensy loader.
20 - Load the .hex file into it.
22 - Press the Reset button by inserting a paperclip gently into the reset hole
23 in the top right corner.
25 - Click the button in the Teensy app to download the firmware.
27 See also [video demonstration](https://www.youtube.com/watch?v=9PyiGUO9_KQ) using Teensy in auto mode.
29 To flash with ´teensy-loader-cli´:
31 - Build the firmware with `make keymapname`, for example `make default`
33 - Run ´<path/to/>teensy_loader_cli -mmcu=atmega32u4 -w ergodox_ez_<keymap>.hex´
35 - Press the Reset button by inserting a paperclip gently into the reset hole
36 in the top right corder.
40 You may want to enable QMK_KEYS_PER_SCAN because the Ergodox has a relatively