diff --git a/User/application/src/tcpserverc.c b/User/application/src/tcpserverc.c
index c010339..e1bcc64 100644
--- a/User/application/src/tcpserverc.c
+++ b/User/application/src/tcpserverc.c
@@ -34,7 +34,7 @@ static err_t tcpecho_recv_control(void *arg, struct tcp_pcb *tpcb, struct pbuf *
     if (p != NULL)
     {
         /* 更新窗口*/
-        tcp_echo_flags_control = 1;
+
         tcp_recved(tpcb, p->tot_len); // 读取数据的控制块   得到所有数据的长度
         server_pcb_control = tpcb;    // 直接赋值
         memcpy(tcp_rx_data, (int *)p->payload, p->tot_len);
@@ -93,6 +93,7 @@ static err_t tcpecho_recv_control(void *arg, struct tcp_pcb *tpcb, struct pbuf *
     }
     else if (err == ERR_OK) // 检测到对方主动关闭连接时，也会调用recv函数，此时p为空
     {
+        tcp_echo_flags_control = 0;
         return tcp_close(tpcb);
     }
 
@@ -101,7 +102,7 @@ static err_t tcpecho_recv_control(void *arg, struct tcp_pcb *tpcb, struct pbuf *
 static err_t tcpecho_accept_control(void *arg, struct tcp_pcb *newpcb, err_t err) // 由于这个函数是*tcp_accept_fn类型的
 {
     tcp_recv(newpcb, tcpecho_recv_control); // 当收到数据时，回调用户自己写的tcpecho_recv
-
+    tcp_echo_flags_control = 1;
     return ERR_OK;
 }
 void tcp_echo_init(void)