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utils.s
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56 lines (47 loc) · 931 Bytes
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@ Macro para aguardar um tempo em segundos e nanosegundos
@ R0 = Tempo em segundos
@ R1 = Tempo em nanosegundos
.macro nanoSleep time
push {r0, r1, r7}
ldr r0, =\time
add r1, r0, #4
mov r7, #sys_nanosleep
svc 0
pop {r0, r1, r7}
.endm
.macro setBtnsPins
push {r4, r5}
ldr r4, =pin_BTN0
mov r5, #input
bl setDirectionGPIO
ldr r4, =pin_BTN1
mov r5, #input
bl setDirectionGPIO
ldr r4, =pin_BTN2
mov r5, #input
bl setDirectionGPIO
pop {r4, r5}
.endm
@ r1: endereço na memoria do botão
debouncerLoop:
push {r0}
cmp r0, #1
beq notPressed
loopDeb:
nanoSleep fiveMilliSeconds
GPIOGet r1
cmp r0, #0
beq loopDeb
notPressed:
pop {r0}
bx lr
@R4: Valor a ser transformado em 2 ASCII
convertBinaryToAscii:
push {r4,r5,r6, lr}
mov r6, #10
udiv r5,r4,r6
mul r6, r5, r6
sub r4, r4, r6
add r0, r5, #0b00110000
add r1, r4,#0b00110000
pop {r4, r5, r6, pc}