diff --git a/V1/switch.c b/V1/switch.c
index 3822b37..f933361 100644
--- a/V1/switch.c
+++ b/V1/switch.c
@@ -33,20 +33,23 @@ void freePin(char *pin)
     writeFile(BASEPATH "unexport", pin, strlen(pin));
 }
 
+void setDirection(char *pin, char *direction, int dirlen)
+{
+    char path[50];
+    sprintf(path, BASEPATH GPIO_FOLDER "direction", pin);
+    writeFile(path, direction, dirlen);
+}
+
 void registerInput(char *pin)
 {
     registerPin(pin);
-    char path[50];
-    sprintf(path, BASEPATH GPIO_FOLDER "direction", pin);
-    writeFile(path, "in", 2);
+    setDirection(pin, "in", 2);
 }
 
 void registerOutput(char *pin)
 {
     registerPin(pin);
-    char path[50];
-    sprintf(path, BASEPATH GPIO_FOLDER "direction", pin);
-    writeFile(path, "out", 3);
+    setDirection(pin, "out", 3);
 }
 
 int readInput(char *pin)