diff --git a/.mxproject b/.mxproject
index 6f74a35..1aa5d5e 100644
--- a/.mxproject
+++ b/.mxproject
@@ -6,30 +6,33 @@ SourceFiles=..\Core\Src\main.c;..\Core\Src\gpio.c;..\Core\Src\dma.c;..\Core\Src\
 HeaderPath=..\Drivers\STM32F4xx_HAL_Driver\Inc;..\Drivers\STM32F4xx_HAL_Driver\Inc\Legacy;..\Drivers\CMSIS\Device\ST\STM32F4xx\Include;..\Drivers\CMSIS\Include;..\Core\Inc;
 CDefines=USE_HAL_DRIVER;STM32F429xx;USE_HAL_DRIVER;USE_HAL_DRIVER;
 
+[]
+SourceFiles=;;
+
 [PreviousGenFiles]
 AdvancedFolderStructure=true
 HeaderFileListSize=8
-HeaderFiles#0=C:/Users/zel/Desktop/WaveBox/Core/Inc/gpio.h
-HeaderFiles#1=C:/Users/zel/Desktop/WaveBox/Core/Inc/dma.h
-HeaderFiles#2=C:/Users/zel/Desktop/WaveBox/Core/Inc/iwdg.h
-HeaderFiles#3=C:/Users/zel/Desktop/WaveBox/Core/Inc/tim.h
-HeaderFiles#4=C:/Users/zel/Desktop/WaveBox/Core/Inc/usart.h
-HeaderFiles#5=C:/Users/zel/Desktop/WaveBox/Core/Inc/stm32f4xx_it.h
-HeaderFiles#6=C:/Users/zel/Desktop/WaveBox/Core/Inc/stm32f4xx_hal_conf.h
-HeaderFiles#7=C:/Users/zel/Desktop/WaveBox/Core/Inc/main.h
+HeaderFiles#0=F:/workspace/sync_wave_box/Core/Inc/gpio.h
+HeaderFiles#1=F:/workspace/sync_wave_box/Core/Inc/dma.h
+HeaderFiles#2=F:/workspace/sync_wave_box/Core/Inc/iwdg.h
+HeaderFiles#3=F:/workspace/sync_wave_box/Core/Inc/tim.h
+HeaderFiles#4=F:/workspace/sync_wave_box/Core/Inc/usart.h
+HeaderFiles#5=F:/workspace/sync_wave_box/Core/Inc/stm32f4xx_it.h
+HeaderFiles#6=F:/workspace/sync_wave_box/Core/Inc/stm32f4xx_hal_conf.h
+HeaderFiles#7=F:/workspace/sync_wave_box/Core/Inc/main.h
 HeaderFolderListSize=1
-HeaderPath#0=C:/Users/zel/Desktop/WaveBox/Core/Inc
+HeaderPath#0=F:/workspace/sync_wave_box/Core/Inc
 HeaderFiles=;
 SourceFileListSize=8
-SourceFiles#0=C:/Users/zel/Desktop/WaveBox/Core/Src/gpio.c
-SourceFiles#1=C:/Users/zel/Desktop/WaveBox/Core/Src/dma.c
-SourceFiles#2=C:/Users/zel/Desktop/WaveBox/Core/Src/iwdg.c
-SourceFiles#3=C:/Users/zel/Desktop/WaveBox/Core/Src/tim.c
-SourceFiles#4=C:/Users/zel/Desktop/WaveBox/Core/Src/usart.c
-SourceFiles#5=C:/Users/zel/Desktop/WaveBox/Core/Src/stm32f4xx_it.c
-SourceFiles#6=C:/Users/zel/Desktop/WaveBox/Core/Src/stm32f4xx_hal_msp.c
-SourceFiles#7=C:/Users/zel/Desktop/WaveBox/Core/Src/main.c
+SourceFiles#0=F:/workspace/sync_wave_box/Core/Src/gpio.c
+SourceFiles#1=F:/workspace/sync_wave_box/Core/Src/dma.c
+SourceFiles#2=F:/workspace/sync_wave_box/Core/Src/iwdg.c
+SourceFiles#3=F:/workspace/sync_wave_box/Core/Src/tim.c
+SourceFiles#4=F:/workspace/sync_wave_box/Core/Src/usart.c
+SourceFiles#5=F:/workspace/sync_wave_box/Core/Src/stm32f4xx_it.c
+SourceFiles#6=F:/workspace/sync_wave_box/Core/Src/stm32f4xx_hal_msp.c
+SourceFiles#7=F:/workspace/sync_wave_box/Core/Src/main.c
 SourceFolderListSize=1
-SourcePath#0=C:/Users/zel/Desktop/WaveBox/Core/Src
+SourcePath#0=F:/workspace/sync_wave_box/Core/Src
 SourceFiles=;
 
diff --git a/Core/Src/iwdg.c b/Core/Src/iwdg.c
index 99c5637..c8bf65d 100644
--- a/Core/Src/iwdg.c
+++ b/Core/Src/iwdg.c
@@ -31,8 +31,8 @@ void MX_IWDG_Init(void)
 {
 
   hiwdg.Instance = IWDG;
-  hiwdg.Init.Prescaler = IWDG_PRESCALER_4;
-  hiwdg.Init.Reload = 4095;
+  hiwdg.Init.Prescaler = IWDG_PRESCALER_256;
+  hiwdg.Init.Reload = 1000;
   if (HAL_IWDG_Init(&hiwdg) != HAL_OK)
   {
     Error_Handler();
diff --git a/Core/Src/main.c b/Core/Src/main.c
index 9db9872..0558907 100644
--- a/Core/Src/main.c
+++ b/Core/Src/main.c
@@ -91,7 +91,7 @@ int main(void)
   /* Initialize all configured peripherals */
   MX_GPIO_Init();
   MX_DMA_Init();
-  // MX_IWDG_Init();
+  MX_IWDG_Init();
   MX_TIM3_Init();
   MX_TIM8_Init();
   MX_USART1_UART_Init();
diff --git a/MDK-ARM/WaveBox.uvguix.zel b/MDK-ARM/WaveBox.uvguix.zel
index 94ae471..954ee30 100644
--- a/MDK-ARM/WaveBox.uvguix.zel
+++ b/MDK-ARM/WaveBox.uvguix.zel
@@ -83,17 +83,17 @@
         <yPos>-1</yPos>
       </MaxPosition>
       <NormalPosition>
-        <Top>105</Top>
-        <Left>295</Left>
-        <Right>1730</Right>
-        <Bottom>774</Bottom>
+        <Top>129</Top>
+        <Left>388</Left>
+        <Right>1823</Right>
+        <Bottom>991</Bottom>
       </NormalPosition>
     </WindowPosition>
     <MDIClientArea>
       <RegID>0</RegID>
       <MDITabState>
-        <Len>1412</Len>
-        <Data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ata>
+        <Len>1386</Len>
+        <Data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ata>
       </MDITabState>
     </MDIClientArea>
     <ViewEx>
@@ -2589,7 +2589,7 @@
       <Doc>
         <Name>../Drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal.c</Name>
         <ColumnNumber>0</ColumnNumber>
-        <TopLine>316</TopLine>
+        <TopLine>319</TopLine>
         <CurrentLine>325</CurrentLine>
         <Folding>1</Folding>
         <ContractedFolders></ContractedFolders>
@@ -2607,7 +2607,7 @@
       <Doc>
         <Name>../Drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_uart.c</Name>
         <ColumnNumber>0</ColumnNumber>
-        <TopLine>2682</TopLine>
+        <TopLine>2685</TopLine>
         <CurrentLine>2707</CurrentLine>
         <Folding>1</Folding>
         <ContractedFolders></ContractedFolders>
@@ -2624,9 +2624,9 @@
       </Doc>
       <Doc>
         <Name>..\usec\user_main.c</Name>
-        <ColumnNumber>0</ColumnNumber>
-        <TopLine>193</TopLine>
-        <CurrentLine>239</CurrentLine>
+        <ColumnNumber>19</ColumnNumber>
+        <TopLine>39</TopLine>
+        <CurrentLine>73</CurrentLine>
         <Folding>1</Folding>
         <ContractedFolders></ContractedFolders>
         <PaneID>0</PaneID>
@@ -2634,7 +2634,7 @@
       <Doc>
         <Name>startup_stm32f429xx.s</Name>
         <ColumnNumber>0</ColumnNumber>
-        <TopLine>174</TopLine>
+        <TopLine>176</TopLine>
         <CurrentLine>183</CurrentLine>
         <Folding>1</Folding>
         <ContractedFolders></ContractedFolders>
@@ -2652,7 +2652,7 @@
       <Doc>
         <Name>../Drivers/CMSIS/Device/ST/STM32F4xx/Include/stm32f429xx.h</Name>
         <ColumnNumber>18</ColumnNumber>
-        <TopLine>1118</TopLine>
+        <TopLine>1119</TopLine>
         <CurrentLine>1120</CurrentLine>
         <Folding>1</Folding>
         <ContractedFolders></ContractedFolders>
@@ -2688,7 +2688,7 @@
       <Doc>
         <Name>../Core/Inc/tim.h</Name>
         <ColumnNumber>0</ColumnNumber>
-        <TopLine>7</TopLine>
+        <TopLine>10</TopLine>
         <CurrentLine>33</CurrentLine>
         <Folding>1</Folding>
         <ContractedFolders></ContractedFolders>
diff --git a/MDK-ARM/WaveBox.uvprojx b/MDK-ARM/WaveBox.uvprojx
index 22c2823..e43a215 100644
--- a/MDK-ARM/WaveBox.uvprojx
+++ b/MDK-ARM/WaveBox.uvprojx
@@ -365,7 +365,7 @@
               <MiscControls>--diag_suppress=381  --diag_suppress=1 --diag_suppress=177 --diag_suppress=111 --diag_suppress=1295</MiscControls>
               <Define>USE_HAL_DRIVER,STM32F429xx</Define>
               <Undefine></Undefine>
-              <IncludePath>../Core/Inc;      ../Drivers/STM32F4xx_HAL_Driver/Inc;      ../Drivers/STM32F4xx_HAL_Driver/Inc/Legacy;      ../Drivers/CMSIS/Device/ST/STM32F4xx/Include;      ../Drivers/CMSIS/Include</IncludePath>
+              <IncludePath>../Core/Inc;       ../Drivers/STM32F4xx_HAL_Driver/Inc;       ../Drivers/STM32F4xx_HAL_Driver/Inc/Legacy;       ../Drivers/CMSIS/Device/ST/STM32F4xx/Include;       ../Drivers/CMSIS/Include</IncludePath>
             </VariousControls>
           </Cads>
           <Aads>
diff --git a/MDK-ARM/startup_stm32f429xx.lst b/MDK-ARM/startup_stm32f429xx.lst
index 18543fd..0d20963 100644
--- a/MDK-ARM/startup_stm32f429xx.lst
+++ b/MDK-ARM/startup_stm32f429xx.lst
@@ -875,11 +875,11 @@ ARM Macro Assembler    Page 14
               00000000 
 Command Line: --debug --xref --diag_suppress=9931 --cpu=Cortex-M4.fp --apcs=int
 erwork --depend=wavebox\startup_stm32f429xx.d -owavebox\startup_stm32f429xx.o -
-IC:\Users\zel\Desktop\WaveBox\MDK-ARM\RTE -IC:\Keil_v5\ARM\PACK\ARM\CMSIS\5.4.0
-\CMSIS\Core\Include -IC:\Keil_v5\ARM\PACK\Keil\STM32F4xx_DFP\2.13.0 --predefine
-="__MICROLIB SETA 1" --predefine="__UVISION_VERSION SETA 514" --predefine="_RTE
-_ SETA 1" --predefine="STM32F429xx SETA 1" --list=startup_stm32f429xx.lst start
-up_stm32f429xx.s
+IF:\workspace\sync_wave_box\MDK-ARM\RTE -IC:\Keil_v5\ARM\PACK\ARM\CMSIS\5.4.0\C
+MSIS\Core\Include -IC:\Keil_v5\ARM\PACK\Keil\STM32F4xx_DFP\2.13.0 --predefine="
+__MICROLIB SETA 1" --predefine="__UVISION_VERSION SETA 514" --predefine="_RTE_ 
+SETA 1" --predefine="STM32F429xx SETA 1" --list=startup_stm32f429xx.lst startup
+_stm32f429xx.s
 
 
 
diff --git a/README.md b/README.md
index 1aa13d2..5995e65 100644
--- a/README.md
+++ b/README.md
@@ -18,7 +18,9 @@
 
         TODO:
             如果低电平时间小于3us，会出现多触发一个脉冲的问题。
-
+    v1.2
+        1.添加看门狗
+        2.修复串口发送错误字符后，串口不好使的BUG
 
 ```
 
diff --git a/WaveBox.ioc b/WaveBox.ioc
index 5562cf5..919f9ce 100644
--- a/WaveBox.ioc
+++ b/WaveBox.ioc
@@ -46,6 +46,9 @@ Dma.TIM8_UP.1.Priority=DMA_PRIORITY_LOW
 Dma.TIM8_UP.1.RequestParameters=Instance,Direction,PeriphInc,MemInc,PeriphDataAlignment,MemDataAlignment,Mode,Priority,FIFOMode
 File.Version=6
 GPIO.groupedBy=
+IWDG.IPParameters=Prescaler,Reload
+IWDG.Prescaler=IWDG_PRESCALER_256
+IWDG.Reload=1000
 KeepUserPlacement=false
 Mcu.Family=STM32F4
 Mcu.IP0=DMA
diff --git a/release/wavebox_v1.2.zip b/release/wavebox_v1.2.zip
new file mode 100644
index 0000000..b2c2a34
Binary files /dev/null and b/release/wavebox_v1.2.zip differ
diff --git a/usec/user_main.c b/usec/user_main.c
index 23a2359..7278c9b 100644
--- a/usec/user_main.c
+++ b/usec/user_main.c
@@ -15,6 +15,7 @@
 #include "stm32f429xx.h"
 #include "stm32f4xx_hal_tim.h"
 #include "stm32f4xx_hal_usart.h"
+#include "iwdg.h"
 
 /**
  * @brief 初始化所有IO状态
@@ -71,6 +72,7 @@ void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart) {
      */
     if (!s_rxbuf_is_ready) {
       if (s_order_rxbuf == 'S') {
+				s_rxbuf_has_received = 0;
         s_rxbuf[s_rxbuf_has_received] = s_order_rxbuf;
         s_rxbuf_has_received++;
       } else if (s_rxbuf_has_received != 0) {
@@ -243,6 +245,7 @@ void user_main() {
 /**
      * @brief 处理接收到的数据
      */
+    HAL_IWDG_Refresh(&hiwdg);
 #if 1
     if (s_rxbuf_is_ready) {
       process_rxbuf();