diff --git a/MDK-ARM/TEST2.uvoptx b/MDK-ARM/TEST2.uvoptx
index fc6b511..57d481d 100644
--- a/MDK-ARM/TEST2.uvoptx
+++ b/MDK-ARM/TEST2.uvoptx
@@ -148,7 +148,24 @@
           <Name>-UB -O2254 -SF1800 -C0 -A0 -I0 -HNlocalhost -HP7184 -P1 -N00("ARM CoreSight SW-DP (ARM Core") -D00(2BA01477) -L00(0) -TO131090 -TC10000000 -TT10000000 -TP21 -TDS8000 -TDT0 -TDC1F -TIEFFFFFFFF -TIP8 -FO7 -FD20000000 -FC800 -FN1 -FF0STM32F4xx_1024.FLM -FS08000000 -FL0100000 -FP0($$Device:STM32F407VGTx$CMSIS\Flash\STM32F4xx_1024.FLM)</Name>
         </SetRegEntry>
       </TargetDriverDllRegistry>
-      <Breakpoint/>
+      <Breakpoint>
+        <Bp>
+          <Number>0</Number>
+          <Type>0</Type>
+          <LineNumber>289</LineNumber>
+          <EnabledFlag>1</EnabledFlag>
+          <Address>134219030</Address>
+          <ByteObject>0</ByteObject>
+          <HtxType>0</HtxType>
+          <ManyObjects>0</ManyObjects>
+          <SizeOfObject>0</SizeOfObject>
+          <BreakByAccess>0</BreakByAccess>
+          <BreakIfRCount>1</BreakIfRCount>
+          <Filename>../Core/Src/stm32f4xx_it.c</Filename>
+          <ExecCommand></ExecCommand>
+          <Expression>\\TEST2\../Core/Src/stm32f4xx_it.c\289</Expression>
+        </Bp>
+      </Breakpoint>
       <WatchWindow1>
         <Ww>
           <count>0</count>
@@ -308,7 +325,7 @@
 
   <Group>
     <GroupName>Application/User/Core</GroupName>
-    <tvExp>1</tvExp>
+    <tvExp>0</tvExp>
     <tvExpOptDlg>0</tvExpOptDlg>
     <cbSel>0</cbSel>
     <RteFlg>0</RteFlg>
diff --git a/User/application/src/tcpserverc.c b/User/application/src/tcpserverc.c
index c3a7d2a..2c2c9a6 100644
--- a/User/application/src/tcpserverc.c
+++ b/User/application/src/tcpserverc.c
@@ -114,9 +114,7 @@ static err_t tcpecho_recv_ble1(void *arg, struct tcp_pcb *tpcb, struct pbuf *p,
         memcpy(&server_pcb_ble1, &tpcb, sizeof(struct tcp_pcb *));
 
         memcpy(ble1_uart6.tx_data, (int *)p->payload, p->tot_len);
-        HART2_RTS_SEND;
-        HAL_UART_Transmit(&huart6, ble1_uart6.tx_data, p->tot_len, 500);
-        HART2_RTS_RECEIVE;
+        dma_usart_send(&huart6, ble1_uart6.tx_data, p->tot_len);
 
         memset(p->payload, 0, p->tot_len);
         pbuf_free(p);
@@ -138,9 +136,7 @@ static err_t tcpecho_recv_ble2(void *arg, struct tcp_pcb *tpcb, struct pbuf *p,
         memcpy(&server_pcb_ble2, &tpcb, sizeof(struct tcp_pcb *));
 
         memcpy(ble2_uart3.tx_data, (int *)p->payload, p->tot_len);
-        HART2_RTS_SEND;
-        HAL_UART_Transmit(&huart3, ble2_uart3.tx_data, p->tot_len, 500);
-        HART2_RTS_RECEIVE;
+        dma_usart_send(&huart3, ble2_uart3.tx_data, p->tot_len);
 
         memset(p->payload, 0, p->tot_len);
         pbuf_free(p);