Merge pull request #39 from ozyx/modify-playback-rate

Allow simulator playback rate to be specified at runtime

docker/Makefile

@@ -15,10 +15,12 @@ define print_message
 	@printf "\033[$(1)m$(2)\033[0m\n"
 endef
 
-.PHONY: all clean yamcs-up yamcs-down yamcs-simulator yamcs-shell help
+.PHONY: all all-10hz clean yamcs-up yamcs-down yamcs-simulator yamcs-simulator-10hz yamcs-shell help
 
 all: clean yamcs-simulator ## run all: clean, yamcs-up (yamcs-down) and yamcs-simulator
 
+all-10hz: clean yamcs-simulator-10hz ## run all: clean, yamcs-up (yamcs-down) and yamcs-simulator
+
 yamcs-up: | yamcs-down ## bring up yamcs system
 	docker compose up -d
 
@@ -30,6 +32,10 @@ yamcs-simulator: yamcs-up ## run yamcs simulator
 	$(call print_message,36,Connect via http://localhost:8090/ system may take about 50 seconds to startup)
 	cd .. && $(PYTHON) ./simulator.py
 
+yamcs-simulator-10hz: yamcs-up ## run yamcs simulator at 10hz
+	$(call print_message,36,Connect via http://localhost:8090/ system may take about 50 seconds to startup)
+	cd .. && $(PYTHON) ./simulator.py --rate=10
+
 yamcs-shell: ## shell into yamcs container
 	docker compose up -d && docker compose exec yamcs bash
 

simulator.py

@@ -7,7 +7,7 @@
 from struct import unpack_from
 from threading import Thread
 from time import sleep
-
+from argparse import ArgumentParser
 
 def send_tm(simulator):
     tm_socket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
@@ -25,7 +25,7 @@ def send_tm(simulator):
             tm_socket.sendto(packet, ('127.0.0.1', 10015))
             simulator.tm_counter += 1
 
-            sleep(1)
+            sleep(1 / simulator.rate)
 
 
 def receive_tc(simulator):
@@ -39,12 +39,13 @@ def receive_tc(simulator):
 
 class Simulator():
 
-    def __init__(self):
+    def __init__(self, rate):
         self.tm_counter = 0
         self.tc_counter = 0
         self.tm_thread = None
         self.tc_thread = None
         self.last_tc = None
+        self.rate = rate
 
     def start(self):
         self.tm_thread = Thread(target=send_tm, args=(self,))
@@ -63,9 +64,16 @@ def print_status(self):
 
 
 if __name__ == '__main__':
-    simulator = Simulator()
+    parser = ArgumentParser()
+    parser.add_argument("-r", "--rate",
+        dest="rate",
+        default=1,
+        type=int,
+        help="Playback rate. 1 = 1Hz, 10 = 10Hz, etc.")
+    args = parser.parse_args()
+    simulator = Simulator(args.rate)
     simulator.start()
-
+    sys.stdout.write('Using playback rate of ' + str(args.rate) + 'Hz \r\n');
     try:
         prev_status = None
         while True: