diff --git a/include/HDProtocolServer.h b/include/HDProtocolServer.h
index b2c6a85..9ffc073 100644
--- a/include/HDProtocolServer.h
+++ b/include/HDProtocolServer.h
@@ -126,8 +126,8 @@ void HDProtocolSendPort(uint8_t dst, const void *data, int len);
 
 /**
  * @brief 临时路由发送(用于发送目标端口的数据后, 解析端临时更改目标端口, 通过 HDProtocolGetDest 获取目标端口)
- * @param src 回送数据数据路由标记
- * @param dst 需要往那个目标数据口发送
+ * @param src 发送源端口
+ * @param dst 回送后需要转发到的目标端口
  * @param data 发送数据
  * @param len 发送数据长度
  * @param needReadCount 需要读取次数
diff --git a/include/HProtocolBind.h b/include/HProtocolBind.h
index 736b396..8fbf471 100644
--- a/include/HProtocolBind.h
+++ b/include/HProtocolBind.h
@@ -32,6 +32,7 @@ typedef uint16_t HProtocolBindFunc_t;
 ///< 协议回调
 typedef void (*HProtocolBindCallback)(HProtocolBind_t index, uint8_t* data, uint16_t len);
 #define HPROTOCOL_BIND_CALL_ARGS HProtocolBind_t index, uint8_t* data, uint16_t len
+#define HPROTOCOL_IS_TIMEOUT() (data == NULL && len == 0)
 
 ///< 协议会话
 typedef struct HProtocolBindInfo
diff --git a/src/HDProtocolServer.c b/src/HDProtocolServer.c
index 95e5d20..691cd8b 100644
--- a/src/HDProtocolServer.c
+++ b/src/HDProtocolServer.c
@@ -235,6 +235,10 @@ void HDProtocolRegisterInit(HDProtocolServerInfo *info, int len)
 
 uint8_t HDProtocolCurrSend(const void *data, int len)
 {
+    if (data == NULL || len == 0) {
+        return 0;
+    }
+
     HDProtocolServerInfo *info = HDProtocolGetCurrInfo();
     if (info == NULL) {
         LogD("curr not read call");
@@ -248,6 +252,10 @@ uint8_t HDProtocolCurrSend(const void *data, int len)
 
 void HDProtocolSendPort(uint8_t dst, const void *data, int len)
 {
+    if (data == NULL || len == 0) {
+        return;
+    }
+
     if (sInfo.writeCall == NULL || sInfo.info == NULL) {
         return;
     }
@@ -263,6 +271,10 @@ void HDProtocolSendPort(uint8_t dst, const void *data, int len)
 
 void HDProtocolTmpSend(uint8_t src, uint8_t dst, const void *data, int len, uint8_t needReadCount, uint8_t waitCount)
 {
+    if (data == NULL || len == 0) {
+        return;
+    }
+
     if (sInfo.writeCall == NULL || sInfo.info == NULL) {
         return;
     }
diff --git a/src/HProtocolBind.c b/src/HProtocolBind.c
index 932dc91..bf93a99 100644
--- a/src/HProtocolBind.c
+++ b/src/HProtocolBind.c
@@ -217,10 +217,11 @@ void HProtocolBindRun(HProtocolBindId_t id)
             continue;
         }
 
-        if (HDLogGetTime() - sBindRegisters[id].binds[i].lastTime >= sBindRegisters[id].binds[i].delayMs) {
-            sBindRegisters[id].binds[i].isTimeout = 1;
+        if (HDLogGetTime() - sBindRegisters[id].binds[i].lastTime < sBindRegisters[id].binds[i].delayMs) {
+            continue;
         }
 
+        sBindRegisters[id].binds[i].isTimeout = 1;
         // 可能是同一个功能码绑定多个回调
         if (sBindRegisters[id].binds[i].callback) {
             sBindRegisters[id].curr = 1;