lib/gpio: add missing doc

Signed-off-by: Alexis Laferrière <alexis.laf@xymus.net>

diff --git a/lib/gpio.nit b/lib/gpio.nit
index 820f608..cea53cb 100644 (file)
--- a/lib/gpio.nit
+++ b/lib/gpio.nit
@@ -17,6 +17,8 @@
 # GPIO related functionnalities
 module gpio
 
+# A physical binary pin
 interface Pin
+       # Set the output of this pin
        fun write(high: Bool) is abstract
 end