diff --git a/a8000_protocol b/a8000_protocol
index e2eaf4c..401f316 160000
--- a/a8000_protocol
+++ b/a8000_protocol
@@ -1 +1 @@
-Subproject commit e2eaf4ce208aaa149127d2bf8fe41434fd63fd08
+Subproject commit 401f316f91ca1b0206f257a99fe0a727665c5220
diff --git a/src/tab/step_motor_ctrl_tab.cpp b/src/tab/step_motor_ctrl_tab.cpp
index be98449..7c07751 100644
--- a/src/tab/step_motor_ctrl_tab.cpp
+++ b/src/tab/step_motor_ctrl_tab.cpp
@@ -95,6 +95,11 @@ void StepMotorCtrlTab::construct(QTabWidget *fathertab) {
     box->newFunc("相对移动", {"distance"}, [this](int argn, const char **args) { ICM->step_motor_easy_move_by(getDeviceId(), atoi(args[0])); });
     box->newFunc("移动到", {"position"}, [this](int argn, const char **args) { ICM->step_motor_easy_move_to(getDeviceId(), atoi(args[0])); });
     box->newFunc("移动到IO", {"ioindex", "direction"}, [this](int argn, const char **args) { ICM->step_motor_easy_move_to_io(getDeviceId(), atoi(args[0]), atoi(args[1])); });
+    box->newFunc("往复运动", {"startPos", "endPos","times"}, [this](int argn, const char **args) {
+          ICM->callcmd3(getDeviceId(), kstep_motor_easy_reciprocating_motion, atoi(args[0]), atoi(args[1]), atoi(args[2]));
+    });
+
+    
   }
 
   {