Добавить общий протокол Periph28335

python/tests/test_periph28335.py

@@ -0,0 +1,23 @@
+from protocan.periph28335 import (
+    bits_lsb_first, build_command, build_read_registers,
+    build_write_register, crc16_modbus, word_from_bits,
+)
+
+
+def test_read_request_matches_delphi_byte_order():
+    request = build_read_registers(16, 24, 64)
+    assert request[:6] == bytes.fromhex("10 03 00 18 00 40")
+    assert int.from_bytes(request[-2:], "little") == crc16_modbus(request[:-2])
+
+
+def test_write_and_command_use_register_127():
+    request = build_write_register(16, 7, 0x1234)
+    assert request[:6] == bytes.fromhex("10 06 00 07 12 34")
+    command = build_command(16, 15)
+    assert command[:6] == bytes.fromhex("10 06 00 7F 80 00")
+
+
+def test_bits_keep_original_lsb_first_order():
+    bits = bits_lsb_first(0x8005)
+    assert bits[0] and bits[2] and bits[15]
+    assert word_from_bits(bits) == 0x8005