diff --git a/soft/PjtKEIL_StepSon/Src/GestionSon.s b/soft/PjtKEIL_StepSon/Src/GestionSon.s
index 88c68cd..cf8d389 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	
+    include ../Driver/DriverJeuLaser.inc;
 
 ; ====================== zone de réservation de données,  ======================================
 ;Section RAM (read only) :
@@ -10,7 +10,7 @@
 ;Section RAM (read write):
 	area    maram,data,readwrite
 		
-index dcd 5512
+index dcd 0
 SortieSon dcw 0
 		
 	export index 	
@@ -39,17 +39,25 @@ Callbackson
 	ldr r2, =index
 	ldr r1, [r2]
 	
-	ldr r0, =Son
-	
 	ldr r3, =LongueurSon
+	ldr r3, [r3]
 	
-	cmp r1, r3
-	bne Conversion
-	 
-	mov r0, #0
+	mov r0, #2
+	mul r3, r0
+	
+	cmp r3, r1
+	bhs Conversion
+	
+	mov r0,#0
+	
+	b fin
 	 
 	 
 Conversion
+
+	ldr r0, =Son
+	ldrsh r0, [r0,r1]
+	
 	
 	add r0, #32768
 	mov r3, #719
@@ -57,12 +65,19 @@ Conversion
 	mov r3, #65535
 	udiv r0, r3
 	
-	
-	add r1, #1
+	add r1, #2
 	str r1, [r2]
 	
+	
+fin
+
+	push{lr, r2, r1, r0}
+	bl PWM_Set_Value_TIM3_Ch3
+	pop{lr, r2, r1, r0}
+	
 	ldr r3, =SortieSon
-	str r3,[r0]
-
-
-	END	
\ No newline at end of file
+	strh r0,[r3]
+    
+    bx lr
+  
+	END	
diff --git a/soft/PjtKEIL_StepSon/Src/principal.c b/soft/PjtKEIL_StepSon/Src/principal.c
index 58e7590..11d27c6 100644
--- a/soft/PjtKEIL_StepSon/Src/principal.c
+++ b/soft/PjtKEIL_StepSon/Src/principal.c
@@ -16,7 +16,9 @@ CLOCK_Configure();
 
 Timer_1234_Init_ff(TIM4,6552);
 	
-GPIO_Configure(GPIOB, 1, OUTPUT, OUTPUT_PPULL);
+GPIO_Configure(GPIOB, 0, OUTPUT, ALT_PPULL);
+
+PWM_Init_ff(TIM3, 3, 720);
 
 Active_IT_Debordement_Timer(TIM4, 2, Callbackson);
 	
diff --git a/soft/PjtKEIL_StepSon/StepSon.uvoptx b/soft/PjtKEIL_StepSon/StepSon.uvoptx
index f79fe1f..fa075ec 100644
--- a/soft/PjtKEIL_StepSon/StepSon.uvoptx
+++ b/soft/PjtKEIL_StepSon/StepSon.uvoptx
@@ -153,7 +153,24 @@
           <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/>
+      <Breakpoint>
+        <Bp>
+          <Number>0</Number>
+          <Type>0</Type>
+          <LineNumber>51</LineNumber>
+          <EnabledFlag>1</EnabledFlag>
+          <Address>134220556</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\51</Expression>
+        </Bp>
+      </Breakpoint>
       <Tracepoint>
         <THDelay>0</THDelay>
       </Tracepoint>
@@ -174,7 +191,7 @@
         <AscS3>0</AscS3>
         <aSer3>0</aSer3>
         <eProf>0</eProf>
-        <aLa>0</aLa>
+        <aLa>1</aLa>
         <aPa1>0</aPa1>
         <AscS4>0</AscS4>
         <aSer4>0</aSer4>
@@ -199,8 +216,13 @@
       <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>008000000000000000000000000000000000894000000000000000000000000000000000536F72746965536F6E00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000100000001000000000000000000E03F1600000000000000000000000000000000000000080A0008</SecondString>
+        </Wi>
+        <Wi>
+          <IntNumber>1</IntNumber>
+          <FirstString>((portb &amp; 0x00000001) &amp; 0x1) &gt;&gt; 0</FirstString>
+          <SecondString>00800000000000000000000000000000E0FFEF400100000000000000000000000000000028706F72746220262030783030303030303031290000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000100000002000000000000000000E03F1600000000000000000000000000000000000000B40A0008</SecondString>
         </Wi>
       </LogicAnalyzers>
       <DebugDescription>
@@ -636,6 +658,18 @@
       <RteFlg>0</RteFlg>
       <bShared>0</bShared>
     </File>
+    <File>
+      <GroupNumber>1</GroupNumber>
+      <FileNumber>3</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>
   </Group>
 
   <Group>
@@ -646,7 +680,7 @@
     <RteFlg>0</RteFlg>
     <File>
       <GroupNumber>2</GroupNumber>
-      <FileNumber>3</FileNumber>
+      <FileNumber>4</FileNumber>
       <FileType>2</FileType>
       <tvExp>0</tvExp>
       <tvExpOptDlg>0</tvExpOptDlg>
@@ -666,7 +700,7 @@
     <RteFlg>0</RteFlg>
     <File>
       <GroupNumber>3</GroupNumber>
-      <FileNumber>4</FileNumber>
+      <FileNumber>5</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 877ff9a..b5f2dde 100644
--- a/soft/PjtKEIL_StepSon/StepSon.uvprojx
+++ b/soft/PjtKEIL_StepSon/StepSon.uvprojx
@@ -393,6 +393,11 @@
               <FileType>2</FileType>
               <FilePath>.\Src\GestionSon.s</FilePath>
             </File>
+            <File>
+              <FileName>bruitverre.asm</FileName>
+              <FileType>2</FileType>
+              <FilePath>.\Src\bruitverre.asm</FilePath>
+            </File>
           </Files>
         </Group>
         <Group>
@@ -807,6 +812,11 @@
               <FileType>2</FileType>
               <FilePath>.\Src\GestionSon.s</FilePath>
             </File>
+            <File>
+              <FileName>bruitverre.asm</FileName>
+              <FileType>2</FileType>
+              <FilePath>.\Src\bruitverre.asm</FilePath>
+            </File>
           </Files>
         </Group>
         <Group>
@@ -1290,6 +1300,11 @@
               <FileType>2</FileType>
               <FilePath>.\Src\GestionSon.s</FilePath>
             </File>
+            <File>
+              <FileName>bruitverre.asm</FileName>
+              <FileType>2</FileType>
+              <FilePath>.\Src\bruitverre.asm</FilePath>
+            </File>
           </Files>
         </Group>
         <Group>