pkg/nmsis_sdk: add NMSIS SDK for Nuclei-based MCUs

The GD32V MCU is a Nuclei-based RISC-V MCU. The NMSIS SDK provides some basic functions for the access to control and status registers of such MCUs.

pkg/nmsis_sdk/Kconfig

@@ -0,0 +1,16 @@
+# Copyright (c) 2023 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.
+
+config PACKAGE_NMSIS_SDK
+    bool "NMSIS SDK for Nuclei-based MCUs"
+    depends on HAS_ARCH_NUCLEI
+    help
+        Vendor SDK from Nuclei System Technology for Nuclei-based MCUs
+
+config HAS_ARCH_NUCLEI
+    bool
+    help
+        Indicates that the MCU is Nuclei-based

pkg/nmsis_sdk/Makefile

@@ -0,0 +1,10 @@
+PKG_NAME=nmsis_sdk
+PKG_URL=https://github.com/Nuclei-Software/NMSIS.git
+# v1.1.0
+PKG_VERSION=c213b493a423750f139e8a3e1400b36a2ceaf914
+PKG_LICENSE=Apache-2.0
+
+include $(RIOTBASE)/pkg/pkg.mk
+
+all:
+	@

pkg/nmsis_sdk/Makefile.dep

@@ -0,0 +1,2 @@
+# This package can only be used with the Nuclei-based MCUs
+FEATURES_REQUIRED += arch_nuclei

pkg/nmsis_sdk/Makefile.include

@@ -0,0 +1,3 @@
+PSEUDOMODULES += nmsis_sdk
+
+INCLUDES += -I$(PKGDIRBASE)/nmsis_sdk/NMSIS/Core/Include

pkg/nmsis_sdk/doc.txt

@@ -0,0 +1,9 @@
+/**
+ * @defgroup pkg_nmsis_sdk Nuclei MCU Software Interface Standard
+ * @ingroup  pkg
+ * @brief    Vendor SDK from Nuclei System Technology for Nuclei-based MCUs
+ *
+ * The NMSIS SDK is required for Nuclei-based MCUs, for example the GDVF103.
+ *
+ * @see      https://github.com/Nuclei-Software/nuclei-sdk
+ */