Add shared PySetTerminal with asynchronous cancellable macros

python/protocan/tms_terminal.py

@@ -136,3 +136,22 @@ def memory_response(raw, controller, command):
             return None
         return data
     return None
+
+
+def bus_steps(write, tetrad, register, data=0):
+    """Two bus register operations planned by the shared C core."""
+    _range(tetrad, 14, "Адрес шины")
+    _range(register, 15, "Регистр шины")
+    _range(data, 0xFFFF, "Данные шины")
+    function = _api("bus_step", [ct.c_int, ct.c_uint, ct.c_uint, ct.c_uint,
+                    ct.c_uint16, ct.POINTER(ct.c_uint32), ct.POINTER(ct.c_uint16),
+                    ct.POINTER(ct.c_uint8)], ct.c_int)
+    result = []
+    for step in range(2):
+        address, value, command = ct.c_uint32(), ct.c_uint16(), ct.c_uint8()
+        status = function(bool(write), step, tetrad, register, data,
+                          ct.byref(address), ct.byref(value), ct.byref(command))
+        if status:
+            raise ValueError(f"Ошибка планирования шины: {status}")
+        result.append((address.value, None if command.value == PEEK else value.value))
+    return result