LED-Driver.md

@@ -203,6 +203,12 @@ Add a new `SIMPLE_LED_SOURCES` variable in `cmake/dependencies.cmake`:
 set(SIMPLE_LED_SOURCES src/shared/drivers/led/SimpleLed.cpp)
 ```
 
+In `cmake/boardcore.cmake`, under #Drivers, add the following line:
+
+```cmake
+${SBS_BASE}/src/shared/drivers/led/SimpleLed.cpp
+```
+
 Now you can add the entrypoint in `CMakeLists.txt`:
 
 ```cmake