forked from acco/chti23
70 lines
No EOL
935 B
ArmAsm
70 lines
No EOL
935 B
ArmAsm
PRESERVE8
|
|
THUMB
|
|
|
|
import Son
|
|
import LongueurSon
|
|
import PeriodeSonMicroSec
|
|
|
|
|
|
; ====================== zone de réservation de données, ======================================
|
|
;Section RAM (read only) :
|
|
area mesdata,data,readonly
|
|
|
|
|
|
;Section RAM (read write):
|
|
area maram,data,readwrite
|
|
|
|
|
|
SortieSon dcw 0
|
|
Index dcw 0
|
|
|
|
export SortieSon
|
|
|
|
|
|
; ===============================================================================================
|
|
|
|
|
|
|
|
|
|
;Section ROM code (read only) :
|
|
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
|