diff --git a/checher_slave.uvoptx b/checher_slave.uvoptx
index e6a6e8b..356c77d 100644
--- a/checher_slave.uvoptx
+++ b/checher_slave.uvoptx
@@ -299,7 +299,7 @@
       <OPTFL>
         <tvExp>1</tvExp>
         <tvExpOptDlg>0</tvExpOptDlg>
-        <IsCurrentTarget>0</IsCurrentTarget>
+        <IsCurrentTarget>1</IsCurrentTarget>
       </OPTFL>
       <CpuCode>18</CpuCode>
       <DebugOpt>
@@ -377,24 +377,7 @@
           <Name></Name>
         </SetRegEntry>
       </TargetDriverDllRegistry>
-      <Breakpoint>
-        <Bp>
-          <Number>0</Number>
-          <Type>0</Type>
-          <LineNumber>185</LineNumber>
-          <EnabledFlag>1</EnabledFlag>
-          <Address>134234652</Address>
-          <ByteObject>0</ByteObject>
-          <HtxType>0</HtxType>
-          <ManyObjects>0</ManyObjects>
-          <SizeOfObject>0</SizeOfObject>
-          <BreakByAccess>0</BreakByAccess>
-          <BreakIfRCount>1</BreakIfRCount>
-          <Filename>.\source\rt_thread\libcpu\arm\cortex-m3\context_rvds.S</Filename>
-          <ExecCommand></ExecCommand>
-          <Expression>\\checker_slave_app\source/rt_thread/libcpu/arm/cortex-m3/context_rvds.S\185</Expression>
-        </Bp>
-      </Breakpoint>
+      <Breakpoint/>
       <WatchWindow1>
         <Ww>
           <count>0</count>
@@ -540,7 +523,7 @@
       <OPTFL>
         <tvExp>1</tvExp>
         <tvExpOptDlg>0</tvExpOptDlg>
-        <IsCurrentTarget>1</IsCurrentTarget>
+        <IsCurrentTarget>0</IsCurrentTarget>
       </OPTFL>
       <CpuCode>18</CpuCode>
       <DebugOpt>
diff --git a/source/ReadMe.txt b/source/ReadMe.txt
index 741c9d9..7a24781 100644
--- a/source/ReadMe.txt
+++ b/source/ReadMe.txt
@@ -322,3 +322,5 @@
     EW_Updata 添加错误12表示小板中无jwt程序
 2024.01.03
     V2.11 读流水号时如果目标值为0则不报错
+2021.01.04
+    V2.12 sn为0时如果未写流水号则报错
diff --git a/source/elec_det/hardware/gpio_cfg.c b/source/elec_det/hardware/gpio_cfg.c
index 759f308..c924d81 100644
--- a/source/elec_det/hardware/gpio_cfg.c
+++ b/source/elec_det/hardware/gpio_cfg.c
@@ -24,7 +24,7 @@ void CtrlGpio_DefInit(void)
 	GPIO_ResetBits(GPIOA,GPIO_InitStructure.GPIO_Pin);
 	
 	GPIO_InitStructure.GPIO_Pin = SEG0_Pin;
-	//GPIO_InitStructure.GPIO_Mode=GPIO_Mode_IN_FLOATING;
+//	GPIO_InitStructure.GPIO_Mode=GPIO_Mode_IN_FLOATING;
 	GPIO_InitStructure.GPIO_Mode=GPIO_Mode_IPD;
 	GPIO_Init(GPIOA,&GPIO_InitStructure);
 	
@@ -91,7 +91,7 @@ uint8_t Gpio_GetDeivceAddr(void)
 	ul_addr |= ((PCin(SEG1_Pin_Nu) & 0x01) <<1);
 	ul_addr |= (PAin(SEG0_Pin_Nu) & 0x01);
 	return ul_addr;
-//	return 1;
+//	return 7;
 }
 
 
diff --git a/source/elec_det/interface/EWChecker.c b/source/elec_det/interface/EWChecker.c
index 2ec55fe..c6e7041 100644
--- a/source/elec_det/interface/EWChecker.c
+++ b/source/elec_det/interface/EWChecker.c
@@ -1049,6 +1049,12 @@ void EW_Test_ReadSN(void)
   temp.data>>=5;
   if((sn!=0)&&(temp.data!=sn)){
     uc_rtv=3;
+    goto end;
+  }
+  // sn为0时如果没写过流水号则失败
+  if((sn==0)&&(temp.data==0)){
+    uc_rtv=4;
+    goto end;
   }
   end:
 	Checker_SetRtv((uint16_t *)&temp,checker_runcfg.rtv_count);
@@ -1081,11 +1087,18 @@ void EW_Test_WriteSN(void)
     uc_rtv=2;
     goto end;
   }
+  // 流水号域如果有值且不为要设置的流水号则失败
+  if((temp.data&(~0x1f))!=0){
+    if((temp.data>>5)!=sn){
+      uc_rtv=3;
+    }
+    goto end;
+  }
   delay_ms(50);
   temp.data=(temp.data&0x1f)|(sn<<5);
 	uc_rtv |= EW_WriteMTP(checker_runcfg.netid,addr,temp.arr,len);
   if(uc_rtv){
-    uc_rtv=3;
+    uc_rtv=4;
     goto end;
   }
   end:
diff --git a/source/elec_det/interface/JQChecker.c b/source/elec_det/interface/JQChecker.c
index 8fc25fd..1848126 100644
--- a/source/elec_det/interface/JQChecker.c
+++ b/source/elec_det/interface/JQChecker.c
@@ -1326,6 +1326,12 @@ void JQ_Test_ReadSN(void)
   temp.data>>=5;
   if((sn!=0)&&(temp.data!=sn)){
     uc_rtv=3;
+    goto end;
+  }
+  // sn为0时如果没写过流水号则失败
+  if((sn==0)&&(temp.data==0)){
+    uc_rtv=4;
+    goto end;
   }
   
 	end:
diff --git a/source/main/compiler_info.h b/source/main/compiler_info.h
index ebed374..fca8e2a 100644
--- a/source/main/compiler_info.h
+++ b/source/main/compiler_info.h
@@ -6,8 +6,8 @@
 
 
 
-#define BUILD_DATE  "2024-01-03 15:32:33"
-#define SOFT_VERSION  "2.11"
+#define BUILD_DATE  "2024-01-04 14:39:32"
+#define SOFT_VERSION  "2.12"
 
 
 
diff --git a/source/prebuild.py b/source/prebuild.py
index 9ffad8b..8ea4956 100644
--- a/source/prebuild.py
+++ b/source/prebuild.py
@@ -7,7 +7,7 @@ import mycopy
 
 
 # 定义软件版本号
-SOFT_VERION = "2.11"
+SOFT_VERION = "2.12"