diff --git a/components/step_motor_ctrl_module/step_motor_ctrl_module.cpp b/components/step_motor_ctrl_module/step_motor_ctrl_module.cpp
index 0536903..cb82c82 100644
--- a/components/step_motor_ctrl_module/step_motor_ctrl_module.cpp
+++ b/components/step_motor_ctrl_module/step_motor_ctrl_module.cpp
@@ -33,7 +33,6 @@ void StepMotorCtrlModule::initialize(int moduleid, IStepperMotor* stepM, ZGPIO i
     m_cfg = m_factory_config;
   }
 
-
   active_cfg();
 
 #if 0
@@ -760,7 +759,7 @@ int32_t StepMotorCtrlModule::module_xxx_reg(int32_t param_id, bool read, int32_t
     PROCESS_REG(kreg_stepmotor_ihold, REG_GET(m_param.ihold), REG_SET(m_param.ihold));
     PROCESS_REG(kreg_stepmotor_irun, REG_GET(m_param.irun), REG_SET(m_param.irun));
     PROCESS_REG(kreg_stepmotor_iholddelay, REG_GET(m_param.iholddelay), REG_SET(m_param.iholddelay));
-
+    PROCESS_REG(kreg_module_input_state, module_readio(&val), ACTION_NONE);
     default:
       return err::kmodule_not_find_config_index;
       break;