implemented checking for late sensor packets
diff --git a/aos/common/control_loop/ControlLoop.h b/aos/common/control_loop/ControlLoop.h
index bb76ffa..e47e0ad 100644
--- a/aos/common/control_loop/ControlLoop.h
+++ b/aos/common/control_loop/ControlLoop.h
@@ -40,6 +40,9 @@
// Control loops run this often, "starting" at time 0.
const time::Time kLoopFrequency = time::Time::InSeconds(0.01);
+// Calculates the next time to run control loops after start.
+time::Time NextLoopTime(time::Time start = time::Time::Now());
+
// Provides helper methods to assist in writing control loops.
// This template expects to be constructed with a queue group as an argument
// that has a goal, position, status, and output queue.