Magic A1314-pro-plus Tri-mode Keyboard

The Magic A1314 keyboard has a decent appearance but average feel. Powered by two AA batteries, it's neither particularly useful nor a waste to throw away. It was used to test Qinheng's tri-mode keyboard solution.
 
Some of the project materials were provided by Qinheng. The actual project files consist of a receiver and a Magic A1314-Pro
 
receiver casing. I found the casing on the street; it didn't match the official board design, so I made some adjustments. I changed the LED pins, but everything else remained the same. Actually, I couldn't find any use for the LEDs in the firmware, so it's essentially unchanged.
 
I drew a three-LED light board, intending to use red, green, and blue indicators, but when coding, I found it useless, so I used the original LEDs. The actual code doesn't include lighting effects; I'll add
 
support for AA battery power later. However, when using AA batteries, do not plug in USB to avoid charging non-rechargeable batteries. I am not responsible for any consequences.
 
It supports AA rechargeable batteries and USB charging. Due to the Type-C female connector, the USB's forward and reverse insertion functions are inconsistent. Forward insertion provides power and USB communication; reverse insertion only provides power and not communication. Therefore, if you find no connection when using USB mode, try reversing the Type-C connector
 
. Key functions:
FN+Q: Connect via Bluetooth
FN+A: Connect via 2.4G
FN+Z: Connect via USB
FN+1/2/3/4: Switch Bluetooth devices (up to 4 hosts; Bluetooth names will be MK00_0/MK01_1...)
FN+0: Re-pair via 2.4G
FN+F1: Decrease screen brightness
FN+F2: Increase screen brightness
FN+F4: Open My Computer
FN+F7: Previous track
FN+F8: Pause
FN+F9: Next track
FN+F10: Mute FN+
F11: Decrease volume
FN+F12: Increase volume
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The uses for F3 and the eject button are still undecided.
 
 
Firmware information:
https://gitee.com/feixiangjusha/miao-kong-a1314-pro-plus.git