boards/arduino-due: export LED via SAUL

boards/arduino-due/Makefile.dep

+ifneq (,$(filter saul_default,$(USEMODULE)))
+  USEMODULE += saul_gpio
+endif

boards/arduino-due/Makefile.include

@@ -12,3 +12,6 @@ export OFLAGS = -O binary
 
 # setup serial terminal
 include $(RIOTBOARD)/Makefile.include.serial
+
+# also include optional dependencies
+include $(RIOTBOARD)/$(BOARD)/Makefile.dep

boards/arduino-due/include/gpio_params.h

+/*
+ * Copyright (C) 2016 Freie Universität Berlin
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser
+ * General Public License v2.1. See the file LICENSE in the top level
+ * directory for more details.
+ */
+
+/**
+ * @ingroup   boards_boards_arduino-due
+ * @{
+ *
+ * @file
+ * @brief     Board specific configuration of direct mapped GPIOs
+ *
+ * @author    Hauke Petersen <hauke.petersen@fu-berlin.de>
+ */
+
+#ifndef GPIO_PARAMS_H
+#define GPIO_PARAMS_H
+
+#include "board.h"
+#include "saul/periph.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @brief   LED configuration
+ */
+static const  saul_gpio_params_t saul_gpio_params[] =
+{
+    {
+        .name = "LED",
+        .pin = LED0_PIN,
+        .mode = GPIO_OUT
+    }
+};
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* GPIO_PARAMS_H */
+/** @} */