DIY Keyboard Ep.4 - Software

Big thanks to PCBWay for sponsoring this video. Check them out here and get a $5 coupon: www.pcbway.com/setinvite.aspx...
If you always wanted to build your own keyboard but didn't know where to begin, this series is for you. In this video, I go over the different options you have to get your keyboard talking to the computer. I show both how you can code a simple firmware yourself, as well as how to configure QMK to do the heavy lifting for you.
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Arduino Keyboard Documentation: www.arduino.cc/reference/en/l...
Arduino special characters: www.arduino.cc/reference/en/l...
QMK Documentation: docs.qmk.fm/#/
QMK GitHub: github.com/qmk/qmk_firmware
QMK Toolbox: github.com/qmk/qmk_toolbox
QMK MSYS: msys.qmk.fm
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00:00 Intro
00:31 PCBWay
01:10 Overview
02:34 Arduino Firmware Basics
15:39 QMK Overview
18:27 What you need
19:22 QMK Structure
20:31 config.h
23:03 Keyboard.c
23:56 Keyboard.h
24:50 Rules.mk
25:55 Keymaps
29:31 Compiling
31:07 Programming
34:18 Outro

[@willcollings5681]

Great video, I learned a lot! I dug a bit into the QMK source code, and can offer some further context to the custom_keycodes enum. Deep in the builtin Quantum libraries a bunch of unique keycode IDs for unusual keys (music buttons, RGB, joysticks, pianos, etc.) are already defined, with "safe_range" being the last element. When you say "my_key1 = safe_range, my_key2, my_key3,..." that generates a sequence of unique keycode IDs (n,n+1,n+2,...) which starts counting from the end of that section, essentially appending your custom keycode IDs to the list of already known IDs. That way you can reference them the same as any other key and you're guaranteed not to have two key definitions overlap each other

[@michaelmuller7616]

Always enjoy your enthusiasm and realistic comments. Keep going!

[@bobmcbob4399]

Seems like RGBLIGHT_LIMIT_VAL corresponds to VALUE in HSV colour space. Is there any calculation we can perform to work out the theoretical total current load for n number of RGB LEDs in a KB?
Is it something like "(RGBLIGHT_LIMIT_VAL / 255) * MAX_AMPS_PER_LED * n "? That assumes that the amps is linear with brightness, which is not the case. Like a 50% brightness will be < 50% current draw of the LED right?

[@fehmiatas]