diff --git a/soft/PjtKEIL_StepSon/Src/GestionSon.s b/soft/PjtKEIL_StepSon/Src/GestionSon.s
index 13ab48b..5e2087a 100644
--- a/soft/PjtKEIL_StepSon/Src/GestionSon.s
+++ b/soft/PjtKEIL_StepSon/Src/GestionSon.s
@@ -6,6 +6,7 @@
 	export SortieSon
 	import LongueurSon
 	import Son
+	import PWM_Set_Value_TIM3_Ch3
 
 ; ====================== zone de réservation de données,  ======================================
 ;Section RAM (read only) :
@@ -58,6 +59,8 @@ alors
 	; mise à jour de SortieSon
 	strh	r0,[r3]
 	;ldr r3,[r0]
+	; mettre à jour la PWM
+	bl PWM_Set_Value_TIM3_Ch3 ;on appelle la fonction avec r0 en paramètre
 	
 	add r7,#1 ;index=index+1
 	str r7,[r2] ; *R2 = R7
diff --git a/soft/PjtKEIL_StepSon/Src/principal.c b/soft/PjtKEIL_StepSon/Src/principal.c
index 41da6a4..75ab9e0 100644
--- a/soft/PjtKEIL_StepSon/Src/principal.c
+++ b/soft/PjtKEIL_StepSon/Src/principal.c
@@ -1,12 +1,13 @@
 
-
 #include "DriverJeuLaser.h"
 
+
 //extern u32 * PeriodeSonMicroSec;
 
 extern void CallbackSon(void);
 
 int main(void)
+
 {
 
 // ===========================================================================
@@ -15,8 +16,10 @@ int main(void)
 
 // Après exécution : le coeur CPU est clocké à 72MHz ainsi que tous les timers
 CLOCK_Configure();
-
-Timer_1234_Init_ff( TIM4, 1000000/11025); //Calcul de la periode de 91 microsec
+GPIO_Configure(GPIOB, 0, OUTPUT, ALT_PPULL);
+PWM_Init_ff( TIM3, 3, 720);
+PWM_Set_Value_TIM3_Ch3(360);
+Timer_1234_Init_ff( TIM4, 91*72); //Calcul de la periode de 91 microsec *72 Mhz
 Active_IT_Debordement_Timer( TIM4, 2, CallbackSon );
 	
 	
diff --git a/soft/PjtKEIL_StepSon/StepSon.uvoptx b/soft/PjtKEIL_StepSon/StepSon.uvoptx
index 5128606..e071cc9 100644
--- a/soft/PjtKEIL_StepSon/StepSon.uvoptx
+++ b/soft/PjtKEIL_StepSon/StepSon.uvoptx
@@ -157,9 +157,9 @@
         <Bp>
           <Number>0</Number>
           <Type>0</Type>
-          <LineNumber>47</LineNumber>
+          <LineNumber>63</LineNumber>
           <EnabledFlag>1</EnabledFlag>
-          <Address>134219980</Address>
+          <Address>134220492</Address>
           <ByteObject>0</ByteObject>
           <HtxType>0</HtxType>
           <ManyObjects>0</ManyObjects>
@@ -168,14 +168,30 @@
           <BreakIfRCount>1</BreakIfRCount>
           <Filename>.\Src\GestionSon.s</Filename>
           <ExecCommand></ExecCommand>
-          <Expression>\\StepSon\Src/GestionSon.s\47</Expression>
+          <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>
       <MemoryWindow1>
         <Mm>
           <WinNumber>1</WinNumber>
           <SubType>266</SubType>
-          <ItemText>R5</ItemText>
+          <ItemText>R3</ItemText>
           <AccSizeX>0</AccSizeX>
         </Mm>
       </MemoryWindow1>
@@ -224,13 +240,13 @@
       <LogicAnalyzers>
         <Wi>
           <IntNumber>0</IntNumber>
-          <FirstString>((portb &amp; 0x00000002) &gt;&gt; 1 &amp; 0x2) &gt;&gt; 1</FirstString>
-          <SecondString>FF000000000000000000000000000000E0FFEF400100000000000000000000000000000028706F7274622026203078303030303030303229203E3E2031000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000100000001000000000000000000E03F130000000000000000000000000000000000000096020008</SecondString>
+          <FirstString>`SortieSon</FirstString>
+          <SecondString>008000000000000000000000000000000070864000000000000000000000000000000000536F72746965536F6E00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000100000001000000000000000000E03F150000000000000000000000000000000000000094080008</SecondString>
         </Wi>
         <Wi>
           <IntNumber>1</IntNumber>
-          <FirstString>`SortieSon</FirstString>
-          <SecondString>0080000000000000000000000000E0FFFFFFEF4100000000000000000000000000000000536F72746965536F6E00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000100000002000000000000000000E03F130000000000000000000000000000000000000094080008</SecondString>
+          <FirstString>((portb &amp; 0x00000001) &amp; 0x1) &gt;&gt; 0</FirstString>
+          <SecondString>00008000000000000000000000000000E0FFEF400100000000000000000000000000000028706F72746220262030783030303030303031290000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000100000002000000000000000000E03F150000000000000000000000000000000000000092080008</SecondString>
         </Wi>
       </LogicAnalyzers>
       <DebugDescription>
@@ -694,6 +710,30 @@
       <RteFlg>0</RteFlg>
       <bShared>0</bShared>
     </File>
+    <File>
+      <GroupNumber>3</GroupNumber>
+      <FileNumber>4</FileNumber>
+      <FileType>5</FileType>
+      <tvExp>0</tvExp>
+      <tvExpOptDlg>0</tvExpOptDlg>
+      <bDave2>0</bDave2>
+      <PathWithFileName>.\Driver\DriverJeuLaser.h</PathWithFileName>
+      <FilenameWithoutPath>DriverJeuLaser.h</FilenameWithoutPath>
+      <RteFlg>0</RteFlg>
+      <bShared>0</bShared>
+    </File>
+    <File>
+      <GroupNumber>3</GroupNumber>
+      <FileNumber>5</FileNumber>
+      <FileType>5</FileType>
+      <tvExp>0</tvExp>
+      <tvExpOptDlg>0</tvExpOptDlg>
+      <bDave2>0</bDave2>
+      <PathWithFileName>.\Driver\DriverJeuLaser.inc</PathWithFileName>
+      <FilenameWithoutPath>DriverJeuLaser.inc</FilenameWithoutPath>
+      <RteFlg>0</RteFlg>
+      <bShared>0</bShared>
+    </File>
   </Group>
 
   <Group>
@@ -704,7 +744,7 @@
     <RteFlg>0</RteFlg>
     <File>
       <GroupNumber>4</GroupNumber>
-      <FileNumber>4</FileNumber>
+      <FileNumber>6</FileNumber>
       <FileType>2</FileType>
       <tvExp>0</tvExp>
       <tvExpOptDlg>0</tvExpOptDlg>
@@ -716,7 +756,7 @@
     </File>
     <File>
       <GroupNumber>4</GroupNumber>
-      <FileNumber>5</FileNumber>
+      <FileNumber>7</FileNumber>
       <FileType>2</FileType>
       <tvExp>0</tvExp>
       <tvExpOptDlg>0</tvExpOptDlg>
diff --git a/soft/PjtKEIL_StepSon/StepSon.uvprojx b/soft/PjtKEIL_StepSon/StepSon.uvprojx
index 2849fe6..c356ffc 100644
--- a/soft/PjtKEIL_StepSon/StepSon.uvprojx
+++ b/soft/PjtKEIL_StepSon/StepSon.uvprojx
@@ -408,6 +408,16 @@
               <FileType>4</FileType>
               <FilePath>.\Driver\DriverJeuLaser.lib</FilePath>
             </File>
+            <File>
+              <FileName>DriverJeuLaser.h</FileName>
+              <FileType>5</FileType>
+              <FilePath>.\Driver\DriverJeuLaser.h</FilePath>
+            </File>
+            <File>
+              <FileName>DriverJeuLaser.inc</FileName>
+              <FileType>5</FileType>
+              <FilePath>.\Driver\DriverJeuLaser.inc</FilePath>
+            </File>
           </Files>
         </Group>
         <Group>
@@ -832,6 +842,16 @@
               <FileType>4</FileType>
               <FilePath>.\Driver\DriverJeuLaser.lib</FilePath>
             </File>
+            <File>
+              <FileName>DriverJeuLaser.h</FileName>
+              <FileType>5</FileType>
+              <FilePath>.\Driver\DriverJeuLaser.h</FilePath>
+            </File>
+            <File>
+              <FileName>DriverJeuLaser.inc</FileName>
+              <FileType>5</FileType>
+              <FilePath>.\Driver\DriverJeuLaser.inc</FilePath>
+            </File>
           </Files>
         </Group>
         <Group>
@@ -1325,6 +1345,16 @@
               <FileType>4</FileType>
               <FilePath>.\Driver\DriverJeuLaser.lib</FilePath>
             </File>
+            <File>
+              <FileName>DriverJeuLaser.h</FileName>
+              <FileType>5</FileType>
+              <FilePath>.\Driver\DriverJeuLaser.h</FilePath>
+            </File>
+            <File>
+              <FileName>DriverJeuLaser.inc</FileName>
+              <FileType>5</FileType>
+              <FilePath>.\Driver\DriverJeuLaser.inc</FilePath>
+            </File>
           </Files>
         </Group>
         <Group>