diff --git a/MDK-ARM/TEST2.uvoptx b/MDK-ARM/TEST2.uvoptx
index 95523fe..62b8d63 100644
--- a/MDK-ARM/TEST2.uvoptx
+++ b/MDK-ARM/TEST2.uvoptx
@@ -230,6 +230,26 @@
           <WinNumber>1</WinNumber>
           <ItemText>hart1_uart5</ItemText>
         </Ww>
+        <Ww>
+          <count>16</count>
+          <WinNumber>1</WinNumber>
+          <ItemText>user_communication_di</ItemText>
+        </Ww>
+        <Ww>
+          <count>17</count>
+          <WinNumber>1</WinNumber>
+          <ItemText>current_buff</ItemText>
+        </Ww>
+        <Ww>
+          <count>18</count>
+          <WinNumber>1</WinNumber>
+          <ItemText>user_communication_ao</ItemText>
+        </Ww>
+        <Ww>
+          <count>19</count>
+          <WinNumber>1</WinNumber>
+          <ItemText>communication_data</ItemText>
+        </Ww>
       </WatchWindow1>
       <MemoryWindow1>
         <Mm>
diff --git a/User/application/inc/communication_protocol.h b/User/application/inc/communication_protocol.h
index 0a5bc6c..958ff8c 100644
--- a/User/application/inc/communication_protocol.h
+++ b/User/application/inc/communication_protocol.h
@@ -16,7 +16,7 @@ typedef enum
     COMMAND_ERROR,
     DEVICE_ERROR,
 } communication_error_e;
-
+#pragma pack(1)
 typedef struct
 {
     uint8_t start_addr;
@@ -49,6 +49,7 @@ typedef union
     communication_ao_t ao_data;
     communication_ai_t ai_data;
 } communication_data_u;
+#pragma pack()
 
 void communication_exception(uint8_t *tx_data, const uint8_t *const rx_data, communication_error_e error_code);
 void communication_get_ai(communication_ai_t *ai_data, uint8_t *tx_data, const uint8_t *const rx_data);
diff --git a/User/application/src/tcpserverc.c b/User/application/src/tcpserverc.c
index 0d33074..57530c5 100644
--- a/User/application/src/tcpserverc.c
+++ b/User/application/src/tcpserverc.c
@@ -176,8 +176,9 @@ static err_t tcpecho_recv_control(void *arg, struct tcp_pcb *tpcb, struct pbuf *
             else if (tcp_rx_data[3] == 0x02) // 读数字量指令
             {
                 /*读操作，从寄存器读取数据，组包返回*/
-                tx_data_len = 7 + user_communication_di->num;
+                
                 user_communication_di = &communication_data.di_data;
+							tx_data_len = 7 + user_communication_di->num;
                 user_read_gpio(user_communication_di, tcp_tx_data, tcp_rx_data);
                 tcp_write(tpcb, tcp_tx_data, tx_data_len, 1);
             }