diff --git a/sdk b/sdk
index 85b8278..1bd944d 160000
--- a/sdk
+++ b/sdk
@@ -1 +1 @@
-Subproject commit 85b827815841cd0ad95352d5ee5917a6034c45e3
+Subproject commit 1bd944d7ea168f6378ac8d8da86badf4c2f0ba27
diff --git a/usrc/main.cpp b/usrc/main.cpp
index d5f21eb..cadebf3 100644
--- a/usrc/main.cpp
+++ b/usrc/main.cpp
@@ -79,14 +79,14 @@ static void initsubmodule() {
 
   motora.setAcceleration(300);
   motora.setDeceleration(300);
-  motora.setIHOLD_IRUN(0, 4, 10);
+  motora.setIHOLD_IRUN(0, 1, 10);
 
   motorb.setAcceleration(300);
   motorb.setDeceleration(300);
-  motorb.setIHOLD_IRUN(0, 4, 10);
+  motorb.setIHOLD_IRUN(0, 1, 10);
 
-  motora.rotate(0);
-  motorb.rotate(0);
+  motora.enable(false);
+  motorb.enable(false);
 
   /*******************************************************************************
    *                            zcanXYRobotCtrlModule                            *