helix serial.c: add some comment

qmk · Oct 28, 2018 · d63fb6f · d63fb6f
1 parent 8517f8a
commit d63fb6f
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/keyboards/helix/serial.c b/keyboards/helix/serial.c
@@ -1,5 +1,10 @@
 /*
  * WARNING: be careful changing this code, it is very timing dependent
+ *
+ * 2018-10-28 checked
+ *  avr-gcc 4.9.2
+ *  avr-gcc 5.4.0
+ *  avr-gcc 7.3.0
  */
 
 #ifndef F_CPU