diff --git a/soft/PjtKEIL_StepSon/GestionSon.h b/soft/PjtKEIL_StepSon/GestionSon.h
new file mode 100644
index 0000000..5abba1b
--- /dev/null
+++ b/soft/PjtKEIL_StepSon/GestionSon.h
@@ -0,0 +1,8 @@
+
+
+
+
+
+
+void CallbackSon(void);
+void StartSon(void);
\ No newline at end of file
diff --git a/soft/PjtKEIL_StepSon/Src/GestionSon.s b/soft/PjtKEIL_StepSon/Src/GestionSon.s
index 5e2087a..bcbc859 100644
--- a/soft/PjtKEIL_StepSon/Src/GestionSon.s
+++ b/soft/PjtKEIL_StepSon/Src/GestionSon.s
@@ -4,6 +4,7 @@
 	export CallbackSon
 	export index
 	export SortieSon
+	export StartSon
 	import LongueurSon
 	import Son
 	import PWM_Set_Value_TIM3_Ch3
@@ -33,7 +34,7 @@ CallbackSon proc
 	ldr r4,=LongueurSon
 	ldr r4,[r4]
 	ldr r2,=index
-	ldr r7,[r2]
+	ldr r7,[r2] ;r7 = valeur de index 
 	cmp r4,r7
 	
 	bne alors
@@ -71,4 +72,18 @@ finsi
 	bx lr	
 	endp
 		
-	END	
\ No newline at end of file
+StartSon proc	
+	ldr r0,=index
+	ldr r1,[r0]
+	mov r1,#0
+	str r1,[r0]
+	bx lr
+	endp
+		
+	END	
+	
+
+
+	
+	
+	
diff --git a/soft/PjtKEIL_StepSon/Src/principal.c b/soft/PjtKEIL_StepSon/Src/principal.c
index 75ab9e0..5bf388a 100644
--- a/soft/PjtKEIL_StepSon/Src/principal.c
+++ b/soft/PjtKEIL_StepSon/Src/principal.c
@@ -5,6 +5,8 @@
 //extern u32 * PeriodeSonMicroSec;
 
 extern void CallbackSon(void);
+extern void StartSon(void);
+int bouton=0;
 
 int main(void)
 
@@ -29,6 +31,11 @@ Active_IT_Debordement_Timer( TIM4, 2, CallbackSon );
 	
 while	(1)
 	{
+		if (bouton==1) {
+			StartSon();
+			bouton=0;
+		
+		}
 	}
 }
 
diff --git a/soft/PjtKEIL_StepSon/StepSon.uvoptx b/soft/PjtKEIL_StepSon/StepSon.uvoptx
index e071cc9..4504d12 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>
@@ -153,40 +153,7 @@
           <Name>-U066CFF574857847167074929 -O2254 -S0 -C0 -A0 -N00("ARM CoreSight SW-DP") -D00(1BA01477) -L00(0) -TO18 -TC10000000 -TP21 -TDS8007 -TDT0 -TDC1F -TIEFFFFFFFF -TIP8 -FO7 -FD20000000 -FC800 -FN1 -FF0STM32F10x_128.FLM -FS08000000 -FL020000 -FP0($$Device:STM32F103RB$Flash\STM32F10x_128.FLM)</Name>
         </SetRegEntry>
       </TargetDriverDllRegistry>
-      <Breakpoint>
-        <Bp>
-          <Number>0</Number>
-          <Type>0</Type>
-          <LineNumber>63</LineNumber>
-          <EnabledFlag>1</EnabledFlag>
-          <Address>134220492</Address>
-          <ByteObject>0</ByteObject>
-          <HtxType>0</HtxType>
-          <ManyObjects>0</ManyObjects>
-          <SizeOfObject>0</SizeOfObject>
-          <BreakByAccess>0</BreakByAccess>
-          <BreakIfRCount>1</BreakIfRCount>
-          <Filename>.\Src\GestionSon.s</Filename>
-          <ExecCommand></ExecCommand>
-          <Expression>\\StepSon\Src/GestionSon.s\63</Expression>
-        </Bp>
-        <Bp>
-          <Number>1</Number>
-          <Type>0</Type>
-          <LineNumber>32</LineNumber>
-          <EnabledFlag>1</EnabledFlag>
-          <Address>134220448</Address>
-          <ByteObject>0</ByteObject>
-          <HtxType>0</HtxType>
-          <ManyObjects>0</ManyObjects>
-          <SizeOfObject>0</SizeOfObject>
-          <BreakByAccess>0</BreakByAccess>
-          <BreakIfRCount>1</BreakIfRCount>
-          <Filename>.\Src\GestionSon.s</Filename>
-          <ExecCommand></ExecCommand>
-          <Expression>\\StepSon\Src/GestionSon.s\32</Expression>
-        </Bp>
-      </Breakpoint>
+      <Breakpoint/>
       <MemoryWindow1>
         <Mm>
           <WinNumber>1</WinNumber>
@@ -241,12 +208,12 @@
         <Wi>
           <IntNumber>0</IntNumber>
           <FirstString>`SortieSon</FirstString>
-          <SecondString>008000000000000000000000000000000070864000000000000000000000000000000000536F72746965536F6E00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000100000001000000000000000000E03F150000000000000000000000000000000000000094080008</SecondString>
+          <SecondString>008000000000000000000000000000000070864000000000000000000000000000000000536F72746965536F6E00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000100000001000000000000000000E03F090000000000000000000000000000000000000094080008</SecondString>
         </Wi>
         <Wi>
           <IntNumber>1</IntNumber>
-          <FirstString>((portb &amp; 0x00000001) &amp; 0x1) &gt;&gt; 0</FirstString>
-          <SecondString>00008000000000000000000000000000E0FFEF400100000000000000000000000000000028706F72746220262030783030303030303031290000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000100000002000000000000000000E03F150000000000000000000000000000000000000092080008</SecondString>
+          <FirstString>(PORTB &amp; 0x00000001)</FirstString>
+          <SecondString>000080000000000000000000000000000000F03F0000000000000000000000000000000028504F52544220262030783030303030303031290000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000100000002000000000000000000E03F09000000000000000000000000000000000000008E0A0008</SecondString>
         </Wi>
       </LogicAnalyzers>
       <DebugDescription>
@@ -313,7 +280,7 @@
       <OPTFL>
         <tvExp>1</tvExp>
         <tvExpOptDlg>0</tvExpOptDlg>
-        <IsCurrentTarget>0</IsCurrentTarget>
+        <IsCurrentTarget>1</IsCurrentTarget>
       </OPTFL>
       <CpuCode>18</CpuCode>
       <DebugOpt>
@@ -420,7 +387,7 @@
         <AscS3>0</AscS3>
         <aSer3>0</aSer3>
         <eProf>0</eProf>
-        <aLa>0</aLa>
+        <aLa>1</aLa>
         <aPa1>0</aPa1>
         <AscS4>0</AscS4>
         <aSer4>0</aSer4>
diff --git a/soft/PjtKEIL_StepSon/StepSon.uvprojx b/soft/PjtKEIL_StepSon/StepSon.uvprojx
index c356ffc..20c738e 100644
--- a/soft/PjtKEIL_StepSon/StepSon.uvprojx
+++ b/soft/PjtKEIL_StepSon/StepSon.uvprojx
@@ -444,7 +444,7 @@
       <TargetName>CibleSondeKEIL</TargetName>
       <ToolsetNumber>0x4</ToolsetNumber>
       <ToolsetName>ARM-ADS</ToolsetName>
-      <pCCUsed>5060750::V5.06 update 6 (build 750)::.\ARMCC</pCCUsed>
+      <pCCUsed>5060960::V5.06 update 7 (build 960)::.\ARMCC</pCCUsed>
       <uAC6>0</uAC6>
       <TargetOption>
         <TargetCommonOption>