diff --git a/sdk b/sdk
index 108101c..e355909 160000
--- a/sdk
+++ b/sdk
@@ -1 +1 @@
-Subproject commit 108101c24780ceeabbd7dbaa380467fbabf0060a
+Subproject commit e3559098645e997ea385ef61f9da037193a2c432
diff --git a/usrc/step_motor_cmd_reg.cpp b/usrc/step_motor_cmd_reg.cpp
index 2a27a60..7f47ce1 100644
--- a/usrc/step_motor_cmd_reg.cpp
+++ b/usrc/step_motor_cmd_reg.cpp
@@ -76,7 +76,7 @@ void step_motor_cmd_reg() {
       return;
     }
     while (true) {
-      if (g_step_motor45[motorid].isReachTargetPos()) {
+      if (g_step_motor45[motorid].is_reach_target_pos()) {
         break;
       }
       ZLOGI(TAG, "stepmotor45_wait_to_reach_pos %d", motorid);