diff --git a/soft/PjtKEIL_StepSon/Src/GestionSon.s b/soft/PjtKEIL_StepSon/Src/GestionSon.s
index 8a75b7a..ba97e0f 100644
--- a/soft/PjtKEIL_StepSon/Src/GestionSon.s
+++ b/soft/PjtKEIL_StepSon/Src/GestionSon.s
@@ -1,7 +1,7 @@
 	PRESERVE8
 	THUMB   
 		
-
+    
 ; ====================== zone de réservation de données,  ======================================
 ;Section RAM (read only) :
 	area    mesdata,data,readonly
@@ -11,20 +11,57 @@
 	area    maram,data,readwrite
 		
 
+SortieSon dcw 0
+	EXPORT SortieSon
+		
+Offset equ 32768
+Intervalle equ 360
+Index equ 0
+		
+    EXPORT CallbackSon
 	
 ; ===============================================================================================
 	
 
-
 		
 ;Section ROM code (read only) :		
 	area    moncode,code,readonly
 ; écrire le code ici		
 
+;short int SortieSon;
+;int LongueurSon 5512
+;int i;
+;if not i == LongueurSon
+;lire[i] str
+;i++
+;
+;360*(SortieSon+32768)/32768
 
-
-
-
+    import son
+	import LongueurSon
+		
+CallbackSon proc
+	push {lr}
+	
+	ldr r0,=son ; tableau de données
+	ldr r1,=SortieSon ; resultat
+	
+	ldr r2,[r1,#LongueurSon] ; point fini
+	ldr r3,[r1,#Index] ; position actuelle
+	
+	add r3,#1
+	cmp r2,r3 ;if on n'arrive pas la fin de tableau, on continue
+	beq FIN ; if oui on quitte le prog
+	
+;	ldr r4,
+;	ldrsh []	
 		
 		
+
+
+FIN
+    mov r3,#0
+			
+	ENDP
+	
 	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..f6eae85 100644
--- a/soft/PjtKEIL_StepSon/Src/principal.c
+++ b/soft/PjtKEIL_StepSon/Src/principal.c
@@ -2,6 +2,10 @@
 
 #include "DriverJeuLaser.h"
 
+extern void CallbackSon(void);
+
+
+
 
 
 int main(void)
@@ -14,7 +18,9 @@ int main(void)
 // Après exécution : le coeur CPU est clocké à 72MHz ainsi que tous les timers
 CLOCK_Configure();
 
-
+Timer_1234_Init_ff(TIM4, 65520000);	
+Active_IT_Debordement_Timer(TIM4, 2, CallbackSon);	
+Run_Timer(TIM4);
 	
 	
 
diff --git a/soft/PjtKEIL_StepSon/StepSon.uvoptx b/soft/PjtKEIL_StepSon/StepSon.uvoptx
index a13d7da..299ecc4 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>
@@ -538,7 +538,40 @@
           <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>8</LineNumber>
+          <EnabledFlag>1</EnabledFlag>
+          <Address>0</Address>
+          <ByteObject>0</ByteObject>
+          <HtxType>0</HtxType>
+          <ManyObjects>0</ManyObjects>
+          <SizeOfObject>0</SizeOfObject>
+          <BreakByAccess>0</BreakByAccess>
+          <BreakIfRCount>0</BreakIfRCount>
+          <Filename>.\Src\principal.c</Filename>
+          <ExecCommand></ExecCommand>
+          <Expression></Expression>
+        </Bp>
+        <Bp>
+          <Number>1</Number>
+          <Type>0</Type>
+          <LineNumber>7</LineNumber>
+          <EnabledFlag>1</EnabledFlag>
+          <Address>0</Address>
+          <ByteObject>0</ByteObject>
+          <HtxType>0</HtxType>
+          <ManyObjects>0</ManyObjects>
+          <SizeOfObject>0</SizeOfObject>
+          <BreakByAccess>0</BreakByAccess>
+          <BreakIfRCount>0</BreakIfRCount>
+          <Filename>.\Src\principal.c</Filename>
+          <ExecCommand></ExecCommand>
+          <Expression></Expression>
+        </Bp>
+      </Breakpoint>
       <MemoryWindow1>
         <Mm>
           <WinNumber>1</WinNumber>
@@ -666,6 +699,38 @@
     </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..839c3b9 100644
--- a/soft/PjtKEIL_StepSon/StepSon.uvprojx
+++ b/soft/PjtKEIL_StepSon/StepSon.uvprojx
@@ -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>
@@ -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>