diff --git a/peripheral/com.c b/peripheral/com.c
index 5df5e17..8a08676 100644
--- a/peripheral/com.c
+++ b/peripheral/com.c
@@ -82,6 +82,7 @@ TComCtrl *rd_ComCreate(cbk_ComCheck _pfCheck, cbk_ComDecode _pfDecode, cbk_ComSe
     rd_RingbufferReset(ptComCtrl->m_stComBuf.m_ptSend);
     ptComCtrl->m_pfSend = _pfSend;
     ptComCtrl->m_iDevIndex = -1;
+    ptComCtrl->m_iRecvTime = RECV_TIMEOUT;
 
     TMutiDev *ptMutiDev = RD_CALLOC(1, sizeof(TMutiDev));
     ptMutiDev->m_pfCheck = _pfCheck;
@@ -93,6 +94,12 @@ TComCtrl *rd_ComCreate(cbk_ComCheck _pfCheck, cbk_ComDecode _pfDecode, cbk_ComSe
     return ptComCtrl;
 }
 
+void rd_ComSetRecvTime(TComCtrl *_ptComCtrl, int _iRecvTime)
+{
+    if (NULL == _ptComCtrl || _iRecvTime <= 0) return; 
+    _ptComCtrl->m_iRecvTime = _iRecvTime;
+}
+
 void rd_ComAddDev(TComCtrl *_ptComCtrl, cbk_ComCheck _pfCheck, cbk_ComDecode _pfDecode)
 {
     TMutiDev *ptMutiDev = RD_CALLOC(1, sizeof(TMutiDev));
diff --git a/peripheral/include/com.h b/peripheral/include/com.h
index c2ddf8d..25674a9 100644
--- a/peripheral/include/com.h
+++ b/peripheral/include/com.h
@@ -102,6 +102,7 @@ typedef struct
     UT_array *m_pMutiDevArray;
     cbk_ComSend m_pfSend;
     void *m_pUserData;
+    int m_iRecvTime; // check返回0时的超时时间
 }TComCtrl;
 
 /*==============================================*
@@ -114,6 +115,7 @@ typedef struct
  *      routines' or functions' implementations *
  *----------------------------------------------*/
 TComCtrl *rd_ComCreate(cbk_ComCheck _pfCheck, cbk_ComDecode _pfDecode, cbk_ComSend _pfSend, int _iSize, void *_pUserData);
+void rd_ComSetRecvTime(TComCtrl *_ptComCtrl, int _iRecvTime);
 void rd_ComAddDev(TComCtrl *_ptComCtrl, cbk_ComCheck _pfCheck, cbk_ComDecode _pfDecode);
 int rd_ComDelete(TComCtrl *_ptComCtrl);
 int rd_ComSend(TComCtrl *_ptComCtrl, char *_pBuffer, uint32_t _iSize);