chti23_grpC_Aittaleb_Barnavon/PjtKEIL_StepSon/Src/GestionSon.s

	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 r<>servation de donn<6E>es,  ======================================
;Section RAM (read only) :
	area    mesdata,data,readonly


;Section RAM (read write):
	area    maram,data,readwrite
		
i dcd 0
SortieSon dcw 0

	
; ===============================================================================================
	


		
;Section ROM code (read only) :		
	area    moncode,code,readonly
; <20>crire 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