Add kLog camera command.

Change-Id: Ica73c88ca38b1fc5dc505ce61553d16772270644
diff --git a/y2019/joystick_reader.cc b/y2019/joystick_reader.cc
index b403913..665714e 100644
--- a/y2019/joystick_reader.cc
+++ b/y2019/joystick_reader.cc
@@ -88,6 +88,8 @@
 const ButtonLocation kMidCargoHint(3, 16);
 const ButtonLocation kFarCargoHint(4, 2);
 
+const ButtonLocation kCameraLog(3, 7);
+
 const ElevatorWristPosition kStowPos{0.36, 0.0};
 const ElevatorWristPosition kClimbPos{0.0, M_PI / 4.0};
 
@@ -397,6 +399,13 @@
       video_tx_->Send(vision_control_);
       last_vision_control_ = monotonic_now;
     }
+
+    {
+      auto camera_log_message = camera_log.MakeMessage();
+      camera_log_message->log = data.IsPressed(kCameraLog);
+      LOG_STRUCT(DEBUG, "camera_log", *camera_log_message);
+      camera_log_message.Send();
+    }
   }
 
  private: