Add tool to create a flash image containing a preloaded app at slot 0

hw/application_fpga/tools/create_flash_image.py

@@ -0,0 +1,28 @@
+#!/usr/bin/env python3
+
+import argparse
+
+FLASH_SIZE_BYTES = 1 * 1024 * 1024
+PRELOADED_APP_0_START = 0x30000
+
+
+def run(output_path, preloaded_app_0_path):
+    with (
+        open(output_path, "wb") as output_file,
+        open(preloaded_app_0_path, "rb") as preloaded_app_0_file,
+    ):
+        content = bytearray(b"\xFF") * FLASH_SIZE_BYTES
+        preloaded_app = preloaded_app_0_file.read()
+        content[
+            PRELOADED_APP_0_START : PRELOADED_APP_0_START + len(preloaded_app)
+        ] = preloaded_app
+        output_file.write(content)
+
+
+if __name__ == "__main__":
+    arg_parser = argparse.ArgumentParser()
+    arg_parser.add_argument("OUTPUT_PATH")
+    arg_parser.add_argument("PRELOADED_APP_0_PATH")
+    args = arg_parser.parse_args()
+
+    run(args.OUTPUT_PATH, args.PRELOADED_APP_0_PATH)