software/demo: add litex_bare_metal_demo pre-installed script.

Build demo: litex_bare_metal_demo --build-path=build/arty/

litex/soc/software/demo/README.md

@@ -6,8 +6,8 @@ This directory provides a minimal bare metal demo app that demonstrates how to e
 [> Build
 --------
 
-Imagine you just build Arty example design from LiteX-Boards, to build the demo app, run in this directory:
- `$ export BUILD_DIR=xxyy/litex/litex/boards/targets/build/arty && make`
+Imagine you just build the Arty example design from LiteX-Boards, to build the demo app, run:
+ `$ litex_bare_metal_demo --build-path=build/arty/`
 
 [> Load
 -------

litex/soc/software/demo/demo.py

@@ -0,0 +1,33 @@
+#!/usr/bin/env python3
+
+#
+# This file is part of LiteX.
+#
+# Copyright (c) 2020 Florent Kermarrec <florent@enjoy-digital.fr>
+# SPDX-License-Identifier: BSD-2-Clause
+
+import os
+import argparse
+from distutils.dir_util import copy_tree
+
+def main():
+    parser = argparse.ArgumentParser(description="LiteX Bare Metal Demo App.")
+    parser.add_argument("--build-path", help="Target's build path.", required=True)
+    args = parser.parse_args()
+
+    # Create demo directory
+    os.makedirs("demo", exist_ok=True)
+
+    # Copy contents to demo directory
+    src = os.path.abspath(os.path.dirname(__file__))
+    copy_tree(src, "demo")
+
+    # Compile demo
+    os.system(f"export BUILD_DIR=../{args.build_path} && cd demo && make")
+
+    # Copy demo.bin
+    os.system("cp demo/demo.bin ./")
+
+if __name__ == "__main__":
+    main()
+

setup.py

@@ -43,6 +43,7 @@ setup(
             "litex_read_verilog=litex.tools.litex_read_verilog:main",
             "litex_simple=litex.boards.targets.simple:main",
             "litex_json2dts=litex.tools.litex_json2dts:main",
+            "litex_bare_metal_demo=litex.soc.software.demo.demo:main",
             # short names
             "lxterm=litex.tools.litex_term:main",
             "lxserver=litex.tools.litex_server:main",