init commit

python_app/hardware_full/librevna_driver/protocol/crc32.py

@@ -0,0 +1,10 @@
+"""CRC32 helpers for LibreVNA packet framing."""
+
+from __future__ import annotations
+
+import zlib
+
+
+def crc32(data: bytes | bytearray | memoryview) -> int:
+    """Compute protocol CRC32 over packet bytes excluding trailing CRC field."""
+    return zlib.crc32(data) & 0xFFFFFFFF