diff --git a/soft/PjtKEIL_StepDeb_1/BacASable.uvprojx b/soft/PjtKEIL_StepDeb_1/BacASable.uvprojx
index e7a5ede..2318c0c 100644
--- a/soft/PjtKEIL_StepDeb_1/BacASable.uvprojx
+++ b/soft/PjtKEIL_StepDeb_1/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/BacASable.uvoptx b/soft/PjtKEIL_StepDeb_2/BacASable.uvoptx
index f1315bb..e12fc32 100644
--- a/soft/PjtKEIL_StepDeb_2/BacASable.uvoptx
+++ b/soft/PjtKEIL_StepDeb_2/BacASable.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>1</IsCurrentTarget>
+        <IsCurrentTarget>0</IsCurrentTarget>
       </OPTFL>
       <CpuCode>18</CpuCode>
       <DebugOpt>
@@ -154,6 +154,21 @@
         </SetRegEntry>
       </TargetDriverDllRegistry>
       <Breakpoint/>
+      <WatchWindow1>
+        <Ww>
+          <count>0</count>
+          <WinNumber>1</WinNumber>
+          <ItemText>FlagCligno</ItemText>
+        </Ww>
+      </WatchWindow1>
+      <MemoryWindow1>
+        <Mm>
+          <WinNumber>1</WinNumber>
+          <SubType>1</SubType>
+          <ItemText>0x200000A0</ItemText>
+          <AccSizeX>0</AccSizeX>
+        </Mm>
+      </MemoryWindow1>
       <Tracepoint>
         <THDelay>0</THDelay>
       </Tracepoint>
@@ -174,7 +189,7 @@
         <AscS3>0</AscS3>
         <aSer3>0</aSer3>
         <eProf>0</eProf>
-        <aLa>0</aLa>
+        <aLa>1</aLa>
         <aPa1>0</aPa1>
         <AscS4>0</AscS4>
         <aSer4>0</aSer4>
@@ -200,7 +215,7 @@
         <Wi>
           <IntNumber>0</IntNumber>
           <FirstString>((portb &amp; 0x00000002) &gt;&gt; 1 &amp; 0x2) &gt;&gt; 1</FirstString>
-          <SecondString>FF000000000000000000000000000000E0FFEF400100000000000000000000000000000028706F7274622026203078303030303030303229203E3E2031000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000100000001000000000000000000F03F160000000000000000000000000000000000000096020008</SecondString>
+          <SecondString>FF000000000000000000000000000000E0FFEF400100000000000000000000000000000028706F7274622026203078303030303030303229203E3E2031000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000100000001000000000000000000F03F040000000000000000000000000000000000000096020008</SecondString>
         </Wi>
       </LogicAnalyzers>
       <DebugDescription>
@@ -267,7 +282,7 @@
       <OPTFL>
         <tvExp>1</tvExp>
         <tvExpOptDlg>0</tvExpOptDlg>
-        <IsCurrentTarget>0</IsCurrentTarget>
+        <IsCurrentTarget>1</IsCurrentTarget>
       </OPTFL>
       <CpuCode>18</CpuCode>
       <DebugOpt>
@@ -374,7 +389,7 @@
         <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 d99d0f0..71dc2cc 100644
--- a/soft/PjtKEIL_StepDeb_2/BacASable.uvprojx
+++ b/soft/PjtKEIL_StepDeb_2/BacASable.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>
@@ -357,7 +357,7 @@
               <MiscControls></MiscControls>
               <Define></Define>
               <Undefine></Undefine>
-              <IncludePath></IncludePath>
+              <IncludePath>.\Driver</IncludePath>
             </VariousControls>
           </Aads>
           <LDads>
@@ -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>
@@ -771,7 +771,7 @@
               <MiscControls></MiscControls>
               <Define></Define>
               <Undefine></Undefine>
-              <IncludePath></IncludePath>
+              <IncludePath>.\Driver</IncludePath>
             </VariousControls>
           </Aads>
           <LDads>
@@ -1337,12 +1337,7 @@
   <LayerInfo>
     <Layers>
       <Layer>
-        <LayName>&lt;Project Info&gt;</LayName>
-        <LayDesc></LayDesc>
-        <LayUrl></LayUrl>
-        <LayKeys></LayKeys>
-        <LayCat></LayCat>
-        <LayLic></LayLic>
+        <LayName>BacASable</LayName>
         <LayTarg>0</LayTarg>
         <LayPrjMark>1</LayPrjMark>
       </Layer>
diff --git a/soft/PjtKEIL_StepDeb_2/Src/Cligno.s b/soft/PjtKEIL_StepDeb_2/Src/Cligno.s
index 8a75b7a..325433a 100644
--- a/soft/PjtKEIL_StepDeb_2/Src/Cligno.s
+++ b/soft/PjtKEIL_StepDeb_2/Src/Cligno.s
@@ -1,5 +1,8 @@
+	include DriverJeuLaser.inc
+	
 	PRESERVE8
-	THUMB   
+	THUMB
+	 
 		
 
 ; ====================== zone de réservation de données,  ======================================
@@ -10,7 +13,12 @@
 ;Section RAM (read write):
 	area    maram,data,readwrite
 		
+FlagCligno dcd 0
+			
+	export FlagCligno
 
+
+ 
 	
 ; ===============================================================================================
 	
@@ -19,12 +27,35 @@
 		
 ;Section ROM code (read only) :		
 	area    moncode,code,readonly
-; écrire le code ici		
-
-
-
+; écrire le code ici	
 
+	EXPORT timer_callback
 
+timer_callback proc 
+	
+		push {lr}
+		ldr r1,=FlagCligno
+		ldr r0,[r1]
+		cmp r0, #1 
+		bne Proc0 
+		
+		mov r0, #1
+		mov r2, #0
+		str r2, [r1]
+		bl GPIOB_Set
+		b fin
+		
+Proc0
+		mov r0, #1
+		mov r2, #1
+		str r2, [r1]
+		bl GPIOB_Clear
+		
+fin
+		pop {pc}
+		endp
+		
+	END	
 		
 		
-	END	
\ No newline at end of file
+	
\ No newline at end of file
diff --git a/soft/PjtKEIL_StepDeb_2/Src/principal.c b/soft/PjtKEIL_StepDeb_2/Src/principal.c
index 4d726a1..60282e5 100644
--- a/soft/PjtKEIL_StepDeb_2/Src/principal.c
+++ b/soft/PjtKEIL_StepDeb_2/Src/principal.c
@@ -2,7 +2,7 @@
 
 #include "DriverJeuLaser.h"
 
-void timer_callback(void);
+extern void timer_callback(void);
 
 int main(void)
 {
@@ -18,6 +18,10 @@ CLOCK_Configure();
 	
 //** Placez votre code là ** // 
 	
+	Timer_1234_Init_ff( TIM4, 7200000);
+	
+	Active_IT_Debordement_Timer( TIM4, 2, timer_callback );
+	 
 	
 	
 // Activation des interruptions issues du Timer 4
@@ -39,12 +43,13 @@ GPIO_Configure(GPIOB, 1, OUTPUT, OUTPUT_PPULL);
 	
 while	(1)
 	{
+
 	}
 }
 
-char FlagCligno;
+//char FlagCligno;
 
-void timer_callback(void)
+/*void timer_callback(void)
 {
 	if (FlagCligno==1)
 	{
@@ -57,5 +62,5 @@ void timer_callback(void)
 		GPIOB_Clear(1);
 	}
 		
-}
+}*/
 
diff --git a/soft/PjtKEIL_StepSon/Src/GestionSon.s b/soft/PjtKEIL_StepSon/Src/GestionSon.s
index 8a75b7a..a81ce4c 100644
--- a/soft/PjtKEIL_StepSon/Src/GestionSon.s
+++ b/soft/PjtKEIL_StepSon/Src/GestionSon.s
@@ -1,6 +1,10 @@
 	PRESERVE8
 	THUMB   
-		
+	
+	import Son
+	import LongueurSon
+	import PeriodeSonMicroSec
+
 
 ; ====================== zone de réservation de données,  ======================================
 ;Section RAM (read only) :
@@ -11,6 +15,11 @@
 	area    maram,data,readwrite
 		
 
+SortieSon dcw 0
+Index dcw 0
+
+	export SortieSon
+
 	
 ; ===============================================================================================
 	
@@ -21,10 +30,41 @@
 	area    moncode,code,readonly
 ; écrire le code ici		
 
+	export timer_callback_son
 
+timer_callback_son proc 
 
+	push {lr,r4}
 
+	ldr r4,=Index
+	ldr r2,[r4]
+	mov r0, r2
+	ldr r1,=LongueurSon
+	ldr r2,[r1]
+	mov r1, r2
+	cmp r0, r1
+	beq fin
+	
+	ldr r3,=SortieSon
+	ldr r2,=Son
+	
+	ldrsh r1,[r2,r0, lsl #1]
+	add r1,#32768
+	mov r2, #720
+	mul r1,r2
+	asr r1,#16
+	
+	str r1, [r3]
+	
+	
+	mov r3, r0
+	add r3, #1
+	str r3, [r4]
+	
 
-		
+fin
+	pop {lr,r4}
+	bx lr
+	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..23f8b08 100644
--- a/soft/PjtKEIL_StepSon/Src/principal.c
+++ b/soft/PjtKEIL_StepSon/Src/principal.c
@@ -2,7 +2,7 @@
 
 #include "DriverJeuLaser.h"
 
-
+extern void timer_callback_son(void);
 
 int main(void)
 {
@@ -14,6 +14,12 @@ int main(void)
 // Après exécution : le coeur CPU est clocké à 72MHz ainsi que tous les timers
 CLOCK_Configure();
 
+// configuration du Timer 4 en débordement 91 microsecondes
+	
+	Timer_1234_Init_ff( TIM4, 91*72);
+	
+	Active_IT_Debordement_Timer( TIM4, 2, timer_callback_son );
+
 
 	
 	
diff --git a/soft/PjtKEIL_StepSon/StepSon.uvoptx b/soft/PjtKEIL_StepSon/StepSon.uvoptx
index a13d7da..a6f7da5 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>
@@ -154,6 +154,14 @@
         </SetRegEntry>
       </TargetDriverDllRegistry>
       <Breakpoint/>
+      <MemoryWindow1>
+        <Mm>
+          <WinNumber>1</WinNumber>
+          <SubType>265</SubType>
+          <ItemText>r3</ItemText>
+          <AccSizeX>0</AccSizeX>
+        </Mm>
+      </MemoryWindow1>
       <Tracepoint>
         <THDelay>0</THDelay>
       </Tracepoint>
@@ -174,7 +182,7 @@
         <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 +207,8 @@
       <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>008000000000000000000000000000000080864000000000000000000000000000000000536F72746965536F6E00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000F00000001000000000000000000F03F0D00000000000000000000000000000000000000AE080008</SecondString>
         </Wi>
       </LogicAnalyzers>
       <DebugDescription>
@@ -460,7 +468,7 @@
       <OPTFL>
         <tvExp>1</tvExp>
         <tvExpOptDlg>0</tvExpOptDlg>
-        <IsCurrentTarget>1</IsCurrentTarget>
+        <IsCurrentTarget>0</IsCurrentTarget>
       </OPTFL>
       <CpuCode>18</CpuCode>
       <DebugOpt>
@@ -616,7 +624,7 @@
       <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>
@@ -666,6 +674,38 @@
     </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..8e2853b 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>
@@ -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>