diff --git a/soft/PjtKEIL_StepDeb_2/BacASable.uvoptx b/soft/PjtKEIL_StepDeb_2/BacASable.uvoptx
index c0c92ae..bfcc4c9 100644
--- a/soft/PjtKEIL_StepDeb_2/BacASable.uvoptx
+++ b/soft/PjtKEIL_StepDeb_2/BacASable.uvoptx
@@ -75,7 +75,7 @@
       <OPTFL>
         <tvExp>1</tvExp>
         <tvExpOptDlg>0</tvExpOptDlg>
-        <IsCurrentTarget>1</IsCurrentTarget>
+        <IsCurrentTarget>0</IsCurrentTarget>
       </OPTFL>
       <CpuCode>18</CpuCode>
       <DebugOpt>
@@ -272,7 +272,7 @@
       <OPTFL>
         <tvExp>1</tvExp>
         <tvExpOptDlg>0</tvExpOptDlg>
-        <IsCurrentTarget>0</IsCurrentTarget>
+        <IsCurrentTarget>1</IsCurrentTarget>
       </OPTFL>
       <CpuCode>18</CpuCode>
       <DebugOpt>
@@ -379,7 +379,7 @@
         <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_StepDeb_2/BacASable.uvprojx b/soft/PjtKEIL_StepDeb_2/BacASable.uvprojx
index e77bfc6..f01d9e2 100644
--- a/soft/PjtKEIL_StepDeb_2/BacASable.uvprojx
+++ b/soft/PjtKEIL_StepDeb_2/BacASable.uvprojx
@@ -424,7 +424,7 @@
       <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>
diff --git a/soft/PjtKEIL_StepDeb_2/Src/Cligno.s b/soft/PjtKEIL_StepDeb_2/Src/Cligno.s
index c660c4e..9be62bd 100644
--- a/soft/PjtKEIL_StepDeb_2/Src/Cligno.s
+++ b/soft/PjtKEIL_StepDeb_2/Src/Cligno.s
@@ -1,7 +1,7 @@
 	PRESERVE8
 	THUMB   
 
-include DriverJeuLaser.inc
+	include Driver/DriverJeuLaser.inc
 
 ; ====================== zone de réservation de données,  ======================================
 ;Section RAM (read only) :
@@ -23,22 +23,24 @@ FlagCligno dcd 0
 ; écrire le code ici		
 
 timer_callback proc
-	push lr					
+	push {lr}			
 	mov r0,#1				; r0 : constant = 1 (arg fonct GPIOB)
 	ldr r2,=FlagCligno 		; r2 : addr de FlagCligno
-	mov r1,[r2]				; r1 : valeur FlagCligno
+	ldr r1,[r2]				; r1 : valeur FlagCligno
 	cmp r1,#0
 	beq FC0
 	; if FlagCligno == 1
-	str #0,[r2]           
+	mov r3,#0
+	str r3,[r2]           
 	bl GPIOB_Set
 	b  fin
 	; if FlagCligno == 0
 FC0
+	mov r3,#1
 	str r3,[r2]
 	bl GPIOB_Clear
 fin
-	pop pc
+	pop {pc}
 	endp
 		
 	END	
\ No newline at end of file
diff --git a/soft/PjtKEIL_StepSon/Src/GestionSon.s b/soft/PjtKEIL_StepSon/Src/GestionSon.s
index 8a75b7a..a6cb9aa 100644
--- a/soft/PjtKEIL_StepSon/Src/GestionSon.s
+++ b/soft/PjtKEIL_StepSon/Src/GestionSon.s
@@ -1,7 +1,8 @@
 	PRESERVE8
 	THUMB   
 		
-
+	include Driver/DriverJeuLaser.inc
+	
 ; ====================== zone de réservation de données,  ======================================
 ;Section RAM (read only) :
 	area    mesdata,data,readonly
@@ -10,18 +11,52 @@
 ;Section RAM (read write):
 	area    maram,data,readwrite
 		
-
+SortieSon dcw 0
+Index dcw 0
 	
 ; ===============================================================================================
-	
-
+	EXPORT SortieSon
+	EXPORT CallbackSon
+	IMPORT Son
+	IMPORT LongueurSon
 
 		
 ;Section ROM code (read only) :		
 	area    moncode,code,readonly
 ; écrire le code ici		
 
-
+CallbackSon proc
+	push {lr}
+	ldr r3,=Index
+	ldr r1,[r3]
+	ldr r0,=LongueurSon
+	ldr r2,[r0]
+	cmp r1,r2	
+	beq FinSig
+	bge Fin
+; if index < longueur son	
+	ldr r2,=Son  ; r2 = @ debut son
+	ldr r0,[r2,r1]
+	add r0,#32768
+	mov r2,#720
+	mul r0,r2
+	lsr r0,#16
+	ldr r2,=SortieSon
+	str r0,[r2] 
+	add r1,#1
+	str r1,[r3]
+	b Fin
+;if index = longueurSon
+FinSig
+	mov r0,#0
+	ldr r2,=SortieSon
+	str r0,[r2]
+	add r1,#1
+	str r1,[r3]
+; if index > longueurson
+Fin
+	pop {pc}
+	endp
 
 
 
diff --git a/soft/PjtKEIL_StepSon/Src/principal.c b/soft/PjtKEIL_StepSon/Src/principal.c
index d09be75..1fcf648 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)
 {
@@ -13,11 +13,12 @@ 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 );
 	
-
+Active_IT_Debordement_Timer( TIM4, 2, CallbackSon );	
+	
+GPIO_Configure(GPIOB, 1, OUTPUT, OUTPUT_PPULL);
 //============================================================================	
 	
 	
diff --git a/soft/PjtKEIL_StepSon/StepSon.uvoptx b/soft/PjtKEIL_StepSon/StepSon.uvoptx
index a13d7da..39bb201 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>
@@ -154,13 +154,28 @@
         </SetRegEntry>
       </TargetDriverDllRegistry>
       <Breakpoint/>
+      <WatchWindow1>
+        <Ww>
+          <count>0</count>
+          <WinNumber>1</WinNumber>
+          <ItemText>SortieSon</ItemText>
+        </Ww>
+      </WatchWindow1>
+      <MemoryWindow1>
+        <Mm>
+          <WinNumber>1</WinNumber>
+          <SubType>257</SubType>
+          <ItemText>r0</ItemText>
+          <AccSizeX>0</AccSizeX>
+        </Mm>
+      </MemoryWindow1>
       <Tracepoint>
         <THDelay>0</THDelay>
       </Tracepoint>
       <DebugFlag>
         <trace>0</trace>
         <periodic>1</periodic>
-        <aLwin>1</aLwin>
+        <aLwin>0</aLwin>
         <aCover>0</aCover>
         <aSer1>0</aSer1>
         <aSer2>0</aSer2>
@@ -199,8 +214,8 @@
       <LogicAnalyzers>
         <Wi>
           <IntNumber>0</IntNumber>
-          <FirstString>((portb &amp; 0x00000002) &gt;&gt; 1 &amp; 0x2) &gt;&gt; 1</FirstString>
-          <SecondString>FF000000000000000000000000000000E0FFEF400100000000000000000000000000000028706F7274622026203078303030303030303229203E3E2031000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000100000001000000000000000000F03F160000000000000000000000000000000000000096020008</SecondString>
+          <FirstString>`SortieSon</FirstString>
+          <SecondString>0080000000000000000000000000E0FFFFFFEF4100000000000000000000000000000000536F72746965536F6E00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000100000001000000000000000000F03F0A00000000000000000000000000000000000000080A0008</SecondString>
         </Wi>
       </LogicAnalyzers>
       <DebugDescription>
@@ -360,7 +375,7 @@
       <DebugFlag>
         <trace>0</trace>
         <periodic>1</periodic>
-        <aLwin>1</aLwin>
+        <aLwin>0</aLwin>
         <aCover>0</aCover>
         <aSer1>0</aSer1>
         <aSer2>0</aSer2>
@@ -460,7 +475,7 @@
       <OPTFL>
         <tvExp>1</tvExp>
         <tvExpOptDlg>0</tvExpOptDlg>
-        <IsCurrentTarget>1</IsCurrentTarget>
+        <IsCurrentTarget>0</IsCurrentTarget>
       </OPTFL>
       <CpuCode>18</CpuCode>
       <DebugOpt>
@@ -608,7 +623,7 @@
 
   <Group>
     <GroupName>Sources</GroupName>
-    <tvExp>1</tvExp>
+    <tvExp>0</tvExp>
     <tvExpOptDlg>0</tvExpOptDlg>
     <cbSel>0</cbSel>
     <RteFlg>0</RteFlg>
@@ -666,6 +681,38 @@
     </File>
   </Group>
 
+  <Group>
+    <GroupName>Son</GroupName>
+    <tvExp>1</tvExp>
+    <tvExpOptDlg>0</tvExpOptDlg>
+    <cbSel>0</cbSel>
+    <RteFlg>0</RteFlg>
+    <File>
+      <GroupNumber>4</GroupNumber>
+      <FileNumber>4</FileNumber>
+      <FileType>2</FileType>
+      <tvExp>0</tvExp>
+      <tvExpOptDlg>0</tvExpOptDlg>
+      <bDave2>0</bDave2>
+      <PathWithFileName>.\Src\bruitverre.asm</PathWithFileName>
+      <FilenameWithoutPath>bruitverre.asm</FilenameWithoutPath>
+      <RteFlg>0</RteFlg>
+      <bShared>0</bShared>
+    </File>
+    <File>
+      <GroupNumber>4</GroupNumber>
+      <FileNumber>5</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>
     <GroupName>::CMSIS</GroupName>
     <tvExp>0</tvExp>
diff --git a/soft/PjtKEIL_StepSon/StepSon.uvprojx b/soft/PjtKEIL_StepSon/StepSon.uvprojx
index d0b5c10..33cf5aa 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>
@@ -410,6 +410,21 @@
             </File>
           </Files>
         </Group>
+        <Group>
+          <GroupName>Son</GroupName>
+          <Files>
+            <File>
+              <FileName>bruitverre.asm</FileName>
+              <FileType>2</FileType>
+              <FilePath>.\Src\bruitverre.asm</FilePath>
+            </File>
+            <File>
+              <FileName>GestionSon.s</FileName>
+              <FileType>2</FileType>
+              <FilePath>.\Src\GestionSon.s</FilePath>
+            </File>
+          </Files>
+        </Group>
         <Group>
           <GroupName>::CMSIS</GroupName>
         </Group>
@@ -419,7 +434,7 @@
       <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>
@@ -819,6 +834,21 @@
             </File>
           </Files>
         </Group>
+        <Group>
+          <GroupName>Son</GroupName>
+          <Files>
+            <File>
+              <FileName>bruitverre.asm</FileName>
+              <FileType>2</FileType>
+              <FilePath>.\Src\bruitverre.asm</FilePath>
+            </File>
+            <File>
+              <FileName>GestionSon.s</FileName>
+              <FileType>2</FileType>
+              <FilePath>.\Src\GestionSon.s</FilePath>
+            </File>
+          </Files>
+        </Group>
         <Group>
           <GroupName>::CMSIS</GroupName>
           <GroupOption>
@@ -897,7 +927,7 @@
       <TargetName>CibleSondeST</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>
@@ -1297,6 +1327,21 @@
             </File>
           </Files>
         </Group>
+        <Group>
+          <GroupName>Son</GroupName>
+          <Files>
+            <File>
+              <FileName>bruitverre.asm</FileName>
+              <FileType>2</FileType>
+              <FilePath>.\Src\bruitverre.asm</FilePath>
+            </File>
+            <File>
+              <FileName>GestionSon.s</FileName>
+              <FileType>2</FileType>
+              <FilePath>.\Src\GestionSon.s</FilePath>
+            </File>
+          </Files>
+        </Group>
         <Group>
           <GroupName>::CMSIS</GroupName>
         </Group>
@@ -1322,12 +1367,7 @@
   <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>