Use correct terminology.

Rename crc to bcc in util.

pyplumio/frames/__init__.py

@@ -153,7 +153,7 @@ def bytes(self) -> bytes:
         data = self.header
         data.append(self.frame_type)
         data += self.message
-        data.append(util.crc(data))
+        data.append(util.bcc(data))
         data.append(FRAME_END)
         return bytes(data)
 

pyplumio/stream.py

@@ -119,7 +119,7 @@ async def read(self) -> Frame | None:
                 + f"'{length - HEADER_SIZE}' bytes"
             ) from e
 
-        if payload[-2] != util.crc(header + payload[:-2]):
+        if payload[-2] != util.bcc(header + payload[:-2]):
             raise ChecksumError(f"Incorrect frame checksum ({payload[-2]})")
 
         frame = factory(

pyplumio/util.py

@@ -28,8 +28,8 @@ def unpack_string(data: bytearray, offset: int = 0) -> str:
 unpack_header = struct.Struct("<BH4B").unpack_from
 
 
-def crc(data: bytes) -> int:
-    """Return a checksum."""
+def bcc(data: bytes) -> int:
+    """Return a block check character."""
     return functools.reduce(lambda x, y: x ^ y, data)
 
 

tests/test_stream.py

@@ -135,7 +135,7 @@ async def test_frame_reader_with_incomplete_read(
     return_value=b"\x31\xfe\x00\xc9\x16",
     new_callable=AsyncMock,
 )
-async def test_frame_reader_with_incorrect_crc(
+async def test_frame_reader_with_incorrect_bcc(
     mock_readexactly, mock_read, frame_reader: FrameReader
 ) -> None:
     """Test reader on frame with incorrect checksum."""

tests/test_util.py

@@ -3,9 +3,9 @@
 from pyplumio import util
 
 
-def test_crc() -> None:
+def test_bcc() -> None:
     """Test CRC checksum calculation."""
-    assert util.crc(b"\x68\x0a\x00\x00\x56\x30\x05\x40") == 0x41
+    assert util.bcc(b"\x68\x0a\x00\x00\x56\x30\x05\x40") == 0x41
 
 
 def test_to_camelcase() -> None: