Index: firmware/source/gio.c
===================================================================
diff -u -r0774a37971585dacdc8398362393920c13d48426 -r8638b207699a3a48e3657e838e24ae838369c867
--- firmware/source/gio.c	(.../gio.c)	(revision 0774a37971585dacdc8398362393920c13d48426)
+++ firmware/source/gio.c	(.../gio.c)	(revision 8638b207699a3a48e3657e838e24ae838369c867)
@@ -133,7 +133,7 @@
                    | (uint32)((uint32)0U << 7U); /* Bit 7 */
 
     /** - Port B direction */
-    gioPORTB->DIR  = (uint32)((uint32)1U << 0U)  /* Bit 0 */
+    gioPORTB->DIR  = (uint32)((uint32)0U << 0U)  /* Bit 0 */
                    | (uint32)((uint32)1U << 1U)  /* Bit 1 */
                    | (uint32)((uint32)0U << 2U)  /* Bit 2 */
                    | (uint32)((uint32)0U << 3U)  /* Bit 3 */
@@ -153,7 +153,7 @@
                    | (uint32)((uint32)0U << 7U); /* Bit 7 */
 
     /** - Port B pullup / pulldown selection */
-    gioPORTB->PSL  = (uint32)((uint32)0U << 0U)  /* Bit 0 */
+    gioPORTB->PSL  = (uint32)((uint32)1U << 0U)  /* Bit 0 */
                    | (uint32)((uint32)0U << 1U)  /* Bit 1 */
                    | (uint32)((uint32)1U << 2U)  /* Bit 2 */
                    | (uint32)((uint32)0U << 3U)  /* Bit 3 */