forked from acco/chti23
77 lines
No EOL
970 B
ArmAsm
77 lines
No EOL
970 B
ArmAsm
PRESERVE8
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THUMB
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; ====================== zone de réservation de données, ======================================
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;Section RAM (read only) :
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area mesdata,data,readonly
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;Section RAM (read write):
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area maram,data,readwrite
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; ===============================================================================================
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include ../Driver/DriverJeuLaser.inc
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export CallbackSon
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export SortieSon
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extern LongueurSon
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extern Son
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Index DCD 0
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SortieSon DCW 0
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;Section ROM code (read only) :
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area moncode,code,readonly
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; écrire le code ici
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CallbackSon proc
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ldr r0,=Index
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ldr r1,[r0]
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ldr r2,=Son
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ldr r3,LongueurSon
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cmp r1,r3
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ble notEqual
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notEqual
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push {r4}
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push {r5}
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ldrsh r5,[r2,r1]
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mov r4,#32768
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add r5,r5,r4
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mov r4,#719
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mul r5,r4
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mov r4,#65535
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udiv r5,r4
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push {r6}
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ldr r6,=SortieSon
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strh r5,[r6]
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add r1, #2
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str r1,[r0]
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pop{r6}
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pop {r4}
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pop {r5}
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bx lr
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ENDFUNC
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END
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