diff --git a/PjtKEIL_StepSon/Src/GestionSon.s b/PjtKEIL_StepSon/Src/GestionSon.s
index 8a75b7a..df3c5a1 100644
--- a/PjtKEIL_StepSon/Src/GestionSon.s
+++ b/PjtKEIL_StepSon/Src/GestionSon.s
@@ -1,6 +1,20 @@
 	PRESERVE8
 	THUMB   
-		
+	EXPORT CallbackSon
+	EXPORT SortieSon
+	EXPORT i
+	IMPORT Son
+	IMPORT LongueurSon
+	INCLUDE DriverJeuLaser.inc
+;void CallbackSon(void){
+;	static int i = 0;
+;	if(i < 5512){
+;0		SortieSon = (Son[i] + 32768) * 719 / 65535;
+;		i++;
+;	}
+;}
+
+
 
 ; ====================== zone de réservation de données,  ======================================
 ;Section RAM (read only) :
@@ -10,6 +24,8 @@
 ;Section RAM (read write):
 	area    maram,data,readwrite
 		
+i dcd 0
+SortieSon dcw 0
 
 	
 ; ===============================================================================================
@@ -21,10 +37,35 @@
 	area    moncode,code,readonly
 ; écrire le code ici		
 
+CallbackSon proc 
+	push {lr}
+;	static int i = 0;
+	ldr r0,=i
+	ldr r1, [r0]
+	ldr r2,LongueurSon
+	cmp r2, r1
+;	if(i < 5512)
+	ble fin
+;0		SortieSon = (Son[i] + 32768) * 719 / 65535;
+	ldr r3,=Son
+	ldrsh r2, [r3,r1, LSL#1]
+	add r2, #32768
+	mov r12, #719
+	mul r2, r12
+	mov r12, #65535
+	udiv r2, r12
+;		i++;	
+	add r1, #1
+	str r1, [r0]
+;	On stocke enfin la sortie son
+	ldr r0, =SortieSon
+	strh r2, [r0]
+	mov r0, r2
+	bl PWM_Set_Value_TIM3_Ch3
 
-
-
-
+fin
+	pop {pc}	
+	ENDFUNC
 		
 		
-	END	
\ No newline at end of file
+	END
\ No newline at end of file
diff --git a/PjtKEIL_StepSon/Src/principal.c b/PjtKEIL_StepSon/Src/principal.c
index fed0338..a1ea3a8 100644
--- a/PjtKEIL_StepSon/Src/principal.c
+++ b/PjtKEIL_StepSon/Src/principal.c
@@ -2,7 +2,16 @@
 
 #include "DriverJeuLaser.h"
 # define PERIODE 6552
+# define PERIODE_PWM 720
 
+//int modulation(int i);
+//void CallbackSon(void);
+
+//extern short int Son [];
+//extern short int LongueurSon;
+
+//short int SortieSon;
+extern void CallbackSon(void);
 
 int main(void)
 {
@@ -18,20 +27,26 @@ CLOCK_Configure();
 Timer_1234_Init_ff(TIM4,PERIODE);
 Active_IT_Debordement_Timer(TIM4, 2, CallbackSon);
 
+//Timer_1234_Init_ff(TIM3,PERIODE_PWM);
+
+PWM_Init_ff( TIM3, 3, 720);
+
 	
-	
+GPIO_Configure(GPIOB, 0, OUTPUT, ALT_PPULL);
 
 //============================================================================	
 	
 	
 while	(1)
 	{
+//PWM_Set_Value_TIM3_Ch3(SortieSon);
 	}
 }
 
-void CallbackSon(void){
-	static int i = 0;
-	
-	
-}
+//void CallbackSon(void){
+	//static int i = 0;
+	//if(i < LongueurSon){
+//		SortieSon = (Son[i] + 32768) * 719 / 65535;
+//		i++;
+//	}
 
diff --git a/PjtKEIL_StepSon/StepSon.uvprojx b/PjtKEIL_StepSon/StepSon.uvprojx
index aab446b..34bc328 100644
--- a/PjtKEIL_StepSon/StepSon.uvprojx
+++ b/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>
@@ -357,7 +357,7 @@
               <MiscControls></MiscControls>
               <Define></Define>
               <Undefine></Undefine>
-              <IncludePath></IncludePath>
+              <IncludePath>.\Driver</IncludePath>
             </VariousControls>
           </Aads>
           <LDads>
@@ -434,7 +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>
@@ -781,7 +781,7 @@
               <MiscControls></MiscControls>
               <Define></Define>
               <Undefine></Undefine>
-              <IncludePath></IncludePath>
+              <IncludePath>.\Driver</IncludePath>
             </VariousControls>
           </Aads>
           <LDads>
@@ -927,7 +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>