diff --git a/components/net/freemodbus-v1.6.0/port/port.c b/components/net/freemodbus-v1.6.0/port/port.c
index 527af909acfc70b322bd9f89932dd2c6cc2ca7d9..d01c5c9d6a7ecc00b61e3501ea2912f153c229a1 100644
--- a/components/net/freemodbus-v1.6.0/port/port.c
+++ b/components/net/freemodbus-v1.6.0/port/port.c
@@ -16,7 +16,7 @@
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
   *
-  * File: $Id: portevent.c,v 1.60 2015/02/01 9:18:05 Armink $
+  * File: $Id: port.c,v 1.60 2015/02/01 9:18:05 Armink $
   */
 
 /* ----------------------- System includes --------------------------------*/
@@ -28,11 +28,11 @@ static rt_base_t level;
 /* ----------------------- Start implementation -----------------------------*/
 void EnterCriticalSection(void)
 {
-	level = rt_hw_interrupt_disable();
+    level = rt_hw_interrupt_disable();
 }
 
 void ExitCriticalSection(void)
 {
-	rt_hw_interrupt_enable(level);
+    rt_hw_interrupt_enable(level);
 }
 
diff --git a/components/net/freemodbus-v1.6.0/port/port.h b/components/net/freemodbus-v1.6.0/port/port.h
index 92056116b891b598f13bb4ddf983e66ae060ed59..73d2177c9a36769d11d31bb200b393bbea3d495e 100644
--- a/components/net/freemodbus-v1.6.0/port/port.h
+++ b/components/net/freemodbus-v1.6.0/port/port.h
@@ -30,11 +30,11 @@
 #include <assert.h>
 #include <inttypes.h>
 
-#define	INLINE
+#define INLINE
 #define PR_BEGIN_EXTERN_C           extern "C" {
-#define	PR_END_EXTERN_C             }
+#define PR_END_EXTERN_C             }
 
-#define ENTER_CRITICAL_SECTION()	EnterCriticalSection()
+#define ENTER_CRITICAL_SECTION()    EnterCriticalSection()
 #define EXIT_CRITICAL_SECTION()    ExitCriticalSection()
 
 typedef uint8_t BOOL;
diff --git a/components/net/freemodbus-v1.6.0/port/portserial.c b/components/net/freemodbus-v1.6.0/port/portserial.c
index 3a5f8eab62fe740d598dbaff5f759c562f117c83..317c7f4605264f33ff0eb183b944df6709264fba 100644
--- a/components/net/freemodbus-v1.6.0/port/portserial.c
+++ b/components/net/freemodbus-v1.6.0/port/portserial.c
@@ -133,7 +133,7 @@ void vMBPortSerialEnable(BOOL xRxEnable, BOOL xTxEnable)
     else
     {
         /* switch 485 to transmit mode */
-    	rt_pin_write(MODBUS_SLAVE_RT_CONTROL_PIN_INDEX, PIN_HIGH);
+        rt_pin_write(MODBUS_SLAVE_RT_CONTROL_PIN_INDEX, PIN_HIGH);
         /* disable RX interrupt */
         serial->ops->control(serial, RT_DEVICE_CTRL_CLR_INT, (void *)RT_DEVICE_FLAG_INT_RX);
     }
diff --git a/components/net/freemodbus-v1.6.0/port/portserial_m.c b/components/net/freemodbus-v1.6.0/port/portserial_m.c
index 6c3d4c8299ef5adf01361d42b60ddb88d709aeca..8ec0d081f1baa424037a400cc5cb37466e0e9469 100644
--- a/components/net/freemodbus-v1.6.0/port/portserial_m.c
+++ b/components/net/freemodbus-v1.6.0/port/portserial_m.c
@@ -57,7 +57,7 @@ BOOL xMBMasterPortSerialInit(UCHAR ucPORT, ULONG ulBaudRate, UCHAR ucDataBits,
      * set 485 mode receive and transmit control IO
      * @note MODBUS_MASTER_RT_CONTROL_PIN_INDEX need be defined by user
      */
-	rt_pin_mode(MODBUS_MASTER_RT_CONTROL_PIN_INDEX, PIN_MODE_OUTPUT);
+    rt_pin_mode(MODBUS_MASTER_RT_CONTROL_PIN_INDEX, PIN_MODE_OUTPUT);
 
     /* set serial name */
     if (ucPORT == 1) {
@@ -129,12 +129,12 @@ void vMBMasterPortSerialEnable(BOOL xRxEnable, BOOL xTxEnable)
         /* enable RX interrupt */
         serial->ops->control(serial, RT_DEVICE_CTRL_SET_INT, (void *)RT_DEVICE_FLAG_INT_RX);
         /* switch 485 to receive mode */
-		rt_pin_write(MODBUS_MASTER_RT_CONTROL_PIN_INDEX, PIN_LOW);
+        rt_pin_write(MODBUS_MASTER_RT_CONTROL_PIN_INDEX, PIN_LOW);
     }
     else
     {
         /* switch 485 to transmit mode */
-    	rt_pin_write(MODBUS_MASTER_RT_CONTROL_PIN_INDEX, PIN_HIGH);
+        rt_pin_write(MODBUS_MASTER_RT_CONTROL_PIN_INDEX, PIN_HIGH);
         /* disable RX interrupt */
         serial->ops->control(serial, RT_DEVICE_CTRL_CLR_INT, (void *)RT_DEVICE_FLAG_INT_RX);
     }
@@ -154,13 +154,13 @@ void vMBMasterPortSerialEnable(BOOL xRxEnable, BOOL xTxEnable)
 
 void vMBMasterPortClose(void)
 {
-	serial->parent.close(&(serial->parent));
+    serial->parent.close(&(serial->parent));
 }
 
 BOOL xMBMasterPortSerialPutByte(CHAR ucByte)
 {
     serial->parent.write(&(serial->parent), 0, &ucByte, 1);
-	return TRUE;
+    return TRUE;
 }
 
 BOOL xMBMasterPortSerialGetByte(CHAR * pucByte)
diff --git a/components/net/freemodbus-v1.6.0/port/porttimer_m.c b/components/net/freemodbus-v1.6.0/port/porttimer_m.c
index 69bdc5487937268fab4a05290f5b5f80fefd98ee..00441bfd1cb16e22dd494bd33f0b721777abf32e 100644
--- a/components/net/freemodbus-v1.6.0/port/porttimer_m.c
+++ b/components/net/freemodbus-v1.6.0/port/porttimer_m.c
@@ -54,44 +54,44 @@ BOOL xMBMasterPortTimersInit(USHORT usTimeOut50us)
 
 void vMBMasterPortTimersT35Enable()
 {
-	rt_tick_t timer_tick = (50 * usT35TimeOut50us)
-			/ (1000 * 1000 / RT_TICK_PER_SECOND);
+    rt_tick_t timer_tick = (50 * usT35TimeOut50us)
+            / (1000 * 1000 / RT_TICK_PER_SECOND);
 
     /* Set current timer mode, don't change it.*/
     vMBMasterSetCurTimerMode(MB_TMODE_T35);
 
-	rt_timer_control(&timer, RT_TIMER_CTRL_SET_TIME, &timer_tick);
+    rt_timer_control(&timer, RT_TIMER_CTRL_SET_TIME, &timer_tick);
 
     rt_timer_start(&timer);
 }
 
 void vMBMasterPortTimersConvertDelayEnable()
 {
-	rt_tick_t timer_tick = MB_MASTER_DELAY_MS_CONVERT * RT_TICK_PER_SECOND / 1000;
+    rt_tick_t timer_tick = MB_MASTER_DELAY_MS_CONVERT * RT_TICK_PER_SECOND / 1000;
 
     /* Set current timer mode, don't change it.*/
     vMBMasterSetCurTimerMode(MB_TMODE_CONVERT_DELAY);
 
-	rt_timer_control(&timer, RT_TIMER_CTRL_SET_TIME, &timer_tick);
+    rt_timer_control(&timer, RT_TIMER_CTRL_SET_TIME, &timer_tick);
 
     rt_timer_start(&timer);
 }
 
 void vMBMasterPortTimersRespondTimeoutEnable()
 {
-	rt_tick_t timer_tick = MB_MASTER_TIMEOUT_MS_RESPOND * RT_TICK_PER_SECOND / 1000;
+    rt_tick_t timer_tick = MB_MASTER_TIMEOUT_MS_RESPOND * RT_TICK_PER_SECOND / 1000;
 
     /* Set current timer mode, don't change it.*/
     vMBMasterSetCurTimerMode(MB_TMODE_RESPOND_TIMEOUT);
 
-	rt_timer_control(&timer, RT_TIMER_CTRL_SET_TIME, &timer_tick);
+    rt_timer_control(&timer, RT_TIMER_CTRL_SET_TIME, &timer_tick);
 
     rt_timer_start(&timer);
 }
 
 void vMBMasterPortTimersDisable()
 {
-	rt_timer_stop(&timer);
+    rt_timer_stop(&timer);
 }
 
 void prvvTIMERExpiredISR(void)
diff --git a/components/net/freemodbus-v1.6.0/port/user_mb_app.c b/components/net/freemodbus-v1.6.0/port/user_mb_app.c
index e6fdede11fee32ac168ec9fb62a3234489afde52..8da7376336d0506fa04f0ccd02aa9948985bcf5b 100644
--- a/components/net/freemodbus-v1.6.0/port/user_mb_app.c
+++ b/components/net/freemodbus-v1.6.0/port/user_mb_app.c
@@ -260,8 +260,8 @@ eMBErrorCode eMBRegDiscreteCB( UCHAR * pucRegBuffer, USHORT usAddress, USHORT us
     if ((usAddress >= DISCRETE_INPUT_START)
             && (usAddress + usNDiscrete    <= DISCRETE_INPUT_START + DISCRETE_INPUT_NDISCRETES))
     {
-        iRegIndex = (USHORT) (usAddress - usDiscreteInputStart) / 8; //每个寄存器存8个
-        iRegBitIndex = (USHORT) (usAddress - usDiscreteInputStart) % 8; //相对于寄存器内部的位地址
+        iRegIndex = (USHORT) (usAddress - usDiscreteInputStart) / 8;
+        iRegBitIndex = (USHORT) (usAddress - usDiscreteInputStart) % 8;
 
         while (iNReg > 0)
         {