diff --git a/soft/PjtKEIL_StepSon/Src/GestionSon.s b/soft/PjtKEIL_StepSon/Src/GestionSon.s
index 8a75b7a..88c68cd 100644
--- a/soft/PjtKEIL_StepSon/Src/GestionSon.s
+++ b/soft/PjtKEIL_StepSon/Src/GestionSon.s
@@ -1,6 +1,6 @@
 	PRESERVE8
 	THUMB   
-		
+	include ../Driver/DriverJeuLaser.inc	
 
 ; ====================== zone de réservation de données,  ======================================
 ;Section RAM (read only) :
@@ -10,7 +10,15 @@
 ;Section RAM (read write):
 	area    maram,data,readwrite
 		
-
+index dcd 5512
+SortieSon dcw 0
+		
+	export index 	
+	export SortieSon
+	export Callbackson
+		
+	extern Son 
+	extern LongueurSon
 	
 ; ===============================================================================================
 	
@@ -21,10 +29,40 @@
 	area    moncode,code,readonly
 ; écrire le code ici		
 
+	;r0 Son
+	;r1 Index
+	;r2 Adresse index
+	;r3 Pour les calculs
+
+Callbackson
+
+	ldr r2, =index
+	ldr r1, [r2]
+	
+	ldr r0, =Son
+	
+	ldr r3, =LongueurSon
+	
+	cmp r1, r3
+	bne Conversion
+	 
+	mov r0, #0
+	 
+	 
+Conversion
+	
+	add r0, #32768
+	mov r3, #719
+	mul r0, r3
+	mov r3, #65535
+	udiv r0, r3
+	
+	
+	add r1, #1
+	str r1, [r2]
+	
+	ldr r3, =SortieSon
+	str r3,[r0]
 
 
-
-
-		
-		
 	END	
\ No newline at end of file
diff --git a/soft/PjtKEIL_StepSon/Src/principal.c b/soft/PjtKEIL_StepSon/Src/principal.c
index d09be75..58e7590 100644
--- a/soft/PjtKEIL_StepSon/Src/principal.c
+++ b/soft/PjtKEIL_StepSon/Src/principal.c
@@ -2,7 +2,7 @@
 
 #include "DriverJeuLaser.h"
 
-
+void Callbackson(void);
 
 int main(void)
 {
@@ -14,8 +14,11 @@ int main(void)
 // Après exécution : le coeur CPU est clocké à 72MHz ainsi que tous les timers
 CLOCK_Configure();
 
-
+Timer_1234_Init_ff(TIM4,6552);
 	
+GPIO_Configure(GPIOB, 1, OUTPUT, OUTPUT_PPULL);
+
+Active_IT_Debordement_Timer(TIM4, 2, Callbackson);
 	
 
 //============================================================================	
@@ -23,6 +26,7 @@ CLOCK_Configure();
 	
 while	(1)
 	{
+		
 	}
 }
 
diff --git a/soft/PjtKEIL_StepSon/StepSon.uvoptx b/soft/PjtKEIL_StepSon/StepSon.uvoptx
index a13d7da..f79fe1f 100644
--- a/soft/PjtKEIL_StepSon/StepSon.uvoptx
+++ b/soft/PjtKEIL_StepSon/StepSon.uvoptx
@@ -10,7 +10,7 @@
     <aExt>*.s*; *.src; *.a*</aExt>
     <oExt>*.obj; *.o</oExt>
     <lExt>*.lib</lExt>
-    <tExt>*.txt; *.h; *.inc</tExt>
+    <tExt>*.txt; *.h; *.inc; *.md</tExt>
     <pExt>*.plm</pExt>
     <CppX>*.cpp</CppX>
     <nMigrate>0</nMigrate>
@@ -75,7 +75,7 @@
       <OPTFL>
         <tvExp>1</tvExp>
         <tvExpOptDlg>0</tvExpOptDlg>
-        <IsCurrentTarget>0</IsCurrentTarget>
+        <IsCurrentTarget>1</IsCurrentTarget>
       </OPTFL>
       <CpuCode>18</CpuCode>
       <DebugOpt>
@@ -460,7 +460,7 @@
       <OPTFL>
         <tvExp>1</tvExp>
         <tvExpOptDlg>0</tvExpOptDlg>
-        <IsCurrentTarget>1</IsCurrentTarget>
+        <IsCurrentTarget>0</IsCurrentTarget>
       </OPTFL>
       <CpuCode>18</CpuCode>
       <DebugOpt>
@@ -616,7 +616,7 @@
       <GroupNumber>1</GroupNumber>
       <FileNumber>1</FileNumber>
       <FileType>1</FileType>
-      <tvExp>0</tvExp>
+      <tvExp>1</tvExp>
       <tvExpOptDlg>0</tvExpOptDlg>
       <bDave2>0</bDave2>
       <PathWithFileName>.\Src\principal.c</PathWithFileName>
@@ -624,6 +624,18 @@
       <RteFlg>0</RteFlg>
       <bShared>0</bShared>
     </File>
+    <File>
+      <GroupNumber>1</GroupNumber>
+      <FileNumber>2</FileNumber>
+      <FileType>2</FileType>
+      <tvExp>0</tvExp>
+      <tvExpOptDlg>0</tvExpOptDlg>
+      <bDave2>0</bDave2>
+      <PathWithFileName>.\Src\GestionSon.s</PathWithFileName>
+      <FilenameWithoutPath>GestionSon.s</FilenameWithoutPath>
+      <RteFlg>0</RteFlg>
+      <bShared>0</bShared>
+    </File>
   </Group>
 
   <Group>
@@ -634,7 +646,7 @@
     <RteFlg>0</RteFlg>
     <File>
       <GroupNumber>2</GroupNumber>
-      <FileNumber>2</FileNumber>
+      <FileNumber>3</FileNumber>
       <FileType>2</FileType>
       <tvExp>0</tvExp>
       <tvExpOptDlg>0</tvExpOptDlg>
@@ -654,7 +666,7 @@
     <RteFlg>0</RteFlg>
     <File>
       <GroupNumber>3</GroupNumber>
-      <FileNumber>3</FileNumber>
+      <FileNumber>4</FileNumber>
       <FileType>4</FileType>
       <tvExp>0</tvExp>
       <tvExpOptDlg>0</tvExpOptDlg>
diff --git a/soft/PjtKEIL_StepSon/StepSon.uvprojx b/soft/PjtKEIL_StepSon/StepSon.uvprojx
index d0b5c10..877ff9a 100644
--- a/soft/PjtKEIL_StepSon/StepSon.uvprojx
+++ b/soft/PjtKEIL_StepSon/StepSon.uvprojx
@@ -10,7 +10,7 @@
       <TargetName>Simu</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>
@@ -388,6 +388,11 @@
               <FileType>1</FileType>
               <FilePath>.\Src\principal.c</FilePath>
             </File>
+            <File>
+              <FileName>GestionSon.s</FileName>
+              <FileType>2</FileType>
+              <FilePath>.\Src\GestionSon.s</FilePath>
+            </File>
           </Files>
         </Group>
         <Group>
@@ -797,6 +802,11 @@
               <FileType>1</FileType>
               <FilePath>.\Src\principal.c</FilePath>
             </File>
+            <File>
+              <FileName>GestionSon.s</FileName>
+              <FileType>2</FileType>
+              <FilePath>.\Src\GestionSon.s</FilePath>
+            </File>
           </Files>
         </Group>
         <Group>
@@ -1275,6 +1285,11 @@
               <FileType>1</FileType>
               <FilePath>.\Src\principal.c</FilePath>
             </File>
+            <File>
+              <FileName>GestionSon.s</FileName>
+              <FileType>2</FileType>
+              <FilePath>.\Src\GestionSon.s</FilePath>
+            </File>
           </Files>
         </Group>
         <Group>
@@ -1322,12 +1337,7 @@
   <LayerInfo>
     <Layers>
       <Layer>
-        <LayName>&lt;Project Info&gt;</LayName>
-        <LayDesc></LayDesc>
-        <LayUrl></LayUrl>
-        <LayKeys></LayKeys>
-        <LayCat></LayCat>
-        <LayLic></LayLic>
+        <LayName>StepSon</LayName>
         <LayTarg>0</LayTarg>
         <LayPrjMark>1</LayPrjMark>
       </Layer>