commands to set and get pcdu parameters

gomspace/gomspace_common.py

@@ -7,6 +7,7 @@
 @date       17.12.2020
 """
 import enum
+import struct
 
 from tmtccmd.tc.pus_8_funccmd import generate_action_command
 from tmtccmd.tc.definitions import PusTelecommand
@@ -30,11 +31,15 @@ class GomspaceOpCodes:
     REQUEST_AUX_HK_ONCE = ["hk-aux", "129"]
     PRINT_SWITCH_V_I = ["print-switch-vi", "130"]
     PRINT_LATCHUPS = ["print-latchups", "131"]
+    GET_PARAM = ["get-param", "132"]
+    SET_PARAM = ["set-param", "133"]
 
 
 class Info:
     REQUEST_CORE_HK_ONCE = "Requesting Core HK once"
     REQUEST_AUX_HK_ONCE = "Requesting Aux HK once"
+    GET_PARAMETER = "Get parameter"
+    SET_PARAMETER = "Set parameter"
 
 
 class SetIds:
@@ -78,10 +83,9 @@ def pack_get_param_command(
     @param parameter_size:  Size of the value to read. E.g. temperature is uint16_t and thus parameter_size is 2
     @return:    The command as bytearray.
     """
-    app_data = bytearray()
-    app_data.append(table_id)
-    app_data.extend(memory_address)
-    app_data.append(parameter_size)
+    app_data = struct.pack('!B', table_id)
+    app_data += struct.pack('!H', memory_address)
+    app_data += struct.pack('!B', parameter_size)
     return generate_action_command(
         object_id=object_id,
         action_id=GomspaceDeviceActionIds.PARAM_GET,
@@ -112,10 +116,7 @@ def pack_set_param_command(
     if parameter_size == 1:
         app_data.append(parameter)
     elif parameter_size == 2:
-        byte_one = 0xFF00 & parameter >> 8
-        byte_two = 0xFF & parameter
-        app_data.append(byte_one)
-        app_data.append(byte_two)
+        app_data += struct.pack('!H', parameter)
     elif parameter_size == 4:
         byte_one = 0xFF000000 & parameter >> 24
         byte_two = 0xFF0000 & parameter >> 16