added new HK API functions

src/tmtccmd/tc/pus_3_fsfw_hk.py

@@ -16,6 +16,51 @@ def make_interval(interval_seconds: float) -> bytearray:
     return bytearray(struct.pack("!f", interval_seconds))
 
 
+def enable_periodic_hk_command(diag: bool, sid: bytes, ssc: int) -> PusTelecommand:
+    return __generate_periodic_hk_command(diag=diag, enable=True, sid=sid, ssc=ssc)
+
+
+def enable_periodic_hk_command_with_interval(
+    diag: bool, sid: bytes, interval_seconds: float, ssc: int
+) -> (PusTelecommand, PusTelecommand):
+    cmd0 = (modify_collection_interval(diag, sid, interval_seconds, ssc),)
+    cmd1 = __generate_periodic_hk_command(diag=diag, enable=True, sid=sid, ssc=ssc)
+    return cmd0, cmd1
+
+
+def disable_periodic_hk_command(diag: bool, sid: bytes, ssc: int) -> PusTelecommand:
+    return __generate_periodic_hk_command(diag=diag, enable=False, sid=sid, ssc=ssc)
+
+
+def __generate_periodic_hk_command(
+    diag: bool, enable: bool, sid: bytes, ssc: int
+) -> PusTelecommand:
+    app_data = bytearray(sid)
+    if enable:
+        if diag:
+            subservice = Subservices.TC_ENABLE_PERIODIC_DIAGNOSTICS_GEN
+        else:
+            subservice = Subservices.TC_DISABLE_PERIODIC_DIAGNOSTICS_GEN
+    else:
+        if diag:
+            subservice = Subservices.TC_ENABLE_PERIODIC_HK_GEN
+        else:
+            subservice = Subservices.TC_DISABLE_PERIODIC_HK_GEN
+    return PusTelecommand(service=3, subservice=subservice, ssc=ssc, app_data=app_data)
+
+
+def modify_collection_interval(
+    diag: bool, sid: bytes, interval_seconds: float, ssc: int
+) -> PusTelecommand:
+    app_data = bytearray(sid)
+    app_data += make_interval(interval_seconds)
+    if diag:
+        subservice = Subservices.TC_MODIFY_PARAMETER_REPORT_COLLECTION_INTERVAL
+    else:
+        subservice = Subservices.TC_MODIFY_DIAGNOSTICS_REPORT_COLLECTION_INTERVAL
+    return PusTelecommand(service=3, subservice=subservice, ssc=ssc, app_data=app_data)
+
+
 def generate_one_hk_command(sid: bytes, ssc: int) -> PusTelecommand:
     return PusTelecommand(
         service=3,