diff --git a/soft/PjtKEIL_StepSon/Src/GestionSon.s b/soft/PjtKEIL_StepSon/Src/GestionSon.s
index d71ead0..0fe9b72 100644
--- a/soft/PjtKEIL_StepSon/Src/GestionSon.s
+++ b/soft/PjtKEIL_StepSon/Src/GestionSon.s
@@ -71,4 +71,19 @@ fin
 	bx lr
 	endp
 		
-	END	
\ No newline at end of file
+	export start_son
+
+start_son proc	
+	
+	ldr r0, =Index
+	
+	mov r1, #0
+	str r1, [r0]
+	bx lr
+	
+	endp
+	
+		
+	END	
+		
+	
\ No newline at end of file
diff --git a/soft/PjtKEIL_StepSon/Src/principal.c b/soft/PjtKEIL_StepSon/Src/principal.c
index b817344..248f4ff 100644
--- a/soft/PjtKEIL_StepSon/Src/principal.c
+++ b/soft/PjtKEIL_StepSon/Src/principal.c
@@ -2,6 +2,9 @@
 
 extern void timer_callback_son(void);
 
+extern void start_son(void);
+int bouton = 0 ;
+
 int main(void)
 {
 
@@ -39,6 +42,10 @@ CLOCK_Configure();
 	
 while	(1)
 	{
+		if (bouton == 1) {
+			start_son();
+			bouton = 0;
+		}
 	}
 }
 
diff --git a/soft/PjtKEIL_StepSon/StepSon.uvoptx b/soft/PjtKEIL_StepSon/StepSon.uvoptx
index 53cdb08..e66ed7a 100644
--- a/soft/PjtKEIL_StepSon/StepSon.uvoptx
+++ b/soft/PjtKEIL_StepSon/StepSon.uvoptx
@@ -75,7 +75,7 @@
       <OPTFL>
         <tvExp>1</tvExp>
         <tvExpOptDlg>0</tvExpOptDlg>
-        <IsCurrentTarget>1</IsCurrentTarget>
+        <IsCurrentTarget>0</IsCurrentTarget>
       </OPTFL>
       <CpuCode>18</CpuCode>
       <DebugOpt>
@@ -215,12 +215,12 @@
         <Wi>
           <IntNumber>0</IntNumber>
           <FirstString>(SortieSon &amp; 0xFFFF) &gt;&gt; 0</FirstString>
-          <SecondString>008000000000000000000000000000000000894000000000000000000000000000000000536F72746965536F6E00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000700000001000000000000000000E03F1500000000000000000000000000000000000000AE080008</SecondString>
+          <SecondString>008000000000000000000000000000000078864000000000000000000000000000000000536F72746965536F6E00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000700000001000000000000000000E03F1500000000000000000000000000000000000000AE080008</SecondString>
         </Wi>
         <Wi>
           <IntNumber>1</IntNumber>
-          <FirstString>(PORTB &amp; 0x00000001)</FirstString>
-          <SecondString>00800000000000000000000000000000E0FFEF400000000000000000000000000000000028504F52544220262030783030303030303031290000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000100000002000000000000000000E03F1500000000000000000000000000000000000000540A0008</SecondString>
+          <FirstString>((PORTB &amp; 0x00000001) &amp; 0xFFFF) &gt;&gt; 0</FirstString>
+          <SecondString>008000000000000000000000000000000000F03F0000000000000000000000000000000028504F52544220262030783030303030303031290000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000100000002000000000000000000E03F1500000000000000000000000000000000000000540A0008</SecondString>
         </Wi>
       </LogicAnalyzers>
       <DebugDescription>
@@ -287,7 +287,7 @@
       <OPTFL>
         <tvExp>1</tvExp>
         <tvExpOptDlg>0</tvExpOptDlg>
-        <IsCurrentTarget>0</IsCurrentTarget>
+        <IsCurrentTarget>1</IsCurrentTarget>
       </OPTFL>
       <CpuCode>18</CpuCode>
       <DebugOpt>
@@ -366,6 +366,13 @@
         </SetRegEntry>
       </TargetDriverDllRegistry>
       <Breakpoint/>
+      <WatchWindow1>
+        <Ww>
+          <count>0</count>
+          <WinNumber>1</WinNumber>
+          <ItemText>bouton</ItemText>
+        </Ww>
+      </WatchWindow1>
       <MemoryWindow1>
         <Mm>
           <WinNumber>1</WinNumber>