Jeremy90307 0beffd5b70 Add an LED driver example using GPIO
Use GPIO to control LED on/off and add related GPIO knowledge.

Test detail:

- Tested on Raspberry Pi 5B with Raspberry Pi OS (Debian 12, Linux
  version 6.12.1-v8-16k+)

- Verify that LED example compiles and loads successfully

- Verify that LED turns on and off sucessfully
2025-03-10 21:40:58 +08:00
..
2021-09-13 04:03:04 +00:00