boards/seeedstudio-gd32: add SAUL support for LEDs and Buttons

boards/seeedstudio-gd32/Kconfig

@@ -15,6 +15,7 @@ config BOARD_SEEEDSTUDIO_GD32
     select HAS_PERIPH_UART
     select BOARD_HAS_HXTAL
     select BOARD_HAS_LXTAL
+    select HAVE_SAUL_GPIO
 
 config BOARD_HAS_HXTAL
     bool

boards/seeedstudio-gd32/Makefile.dep

@@ -0,0 +1,3 @@
+ifneq (,$(filter saul_default,$(USEMODULE)))
+  USEMODULE += saul_gpio
+endif

boards/seeedstudio-gd32/include/gpio_params.h

@@ -0,0 +1,70 @@
+/*
+ * Copyright (C) 2020 Gunar Schorcht
+ *
+ * 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_seeedstudio-gd32
+ * @{
+ *
+ * @file
+ * @brief       Configuration of SAUL mapped GPIO pins
+ *
+ * @author      Gunar Schorcht <gunar@schorcht.net>
+ */
+
+#ifndef GPIO_PARAMS_H
+#define GPIO_PARAMS_H
+
+#include "board.h"
+#include "saul/periph.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @brief    LED/Button SAUL configuration
+ */
+static const  saul_gpio_params_t saul_gpio_params[] =
+{
+    {
+        .name  = "LED RED",
+        .pin   = LED0_PIN,
+        .mode  = GPIO_OUT,
+        .flags = (SAUL_GPIO_INVERTED | SAUL_GPIO_INIT_CLEAR),
+    },
+    {
+        .name  = "LED GREEN",
+        .pin   = LED1_PIN,
+        .mode  = GPIO_OUT,
+        .flags = (SAUL_GPIO_INVERTED | SAUL_GPIO_INIT_CLEAR),
+    },
+    {
+        .name  = "LED BLUE",
+        .pin   = LED2_PIN,
+        .mode  = GPIO_OUT,
+        .flags = (SAUL_GPIO_INVERTED | SAUL_GPIO_INIT_CLEAR),
+    },
+    {
+        .name  = "KEY1",
+        .pin   = BTN0_PIN,
+        .mode  = BTN0_MODE,
+    },
+    {
+        .name  = "KEY2",
+        .pin   = BTN1_PIN,
+        .mode  = BTN1_MODE,
+        .flags = SAUL_GPIO_INVERTED,
+    },
+};
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* GPIO_PARAMS_H */
+/** @} */