section .init
.global _start$
_start$:
ldr r0,=0x3F200000 @ store number 3F200000 in register r0
mov r1,#1
lsl r1,#21
str r1,[r0,#4] @ make pin outputs
mov r1,#1 @ move number dec 1 to Output pin 1
lsl r1,#17 @ move value in r1 by 17 places to the left
_loop$:
str r1,[r0,#40] @ turn on GPIO 17 (turn off LED)
mov r2,#0x8F0000 @ 0x8F0000 is some number we want to decrement to 0
_wait1s$:
sub r2,#1
cmp r2,#0
bne _wait1s$
str r1,[r0,#28] @ turn off GPIO 17 (turn on LED)
mov r2,#0x1F0000
_wait2s$:
sub r2,#1
cmp r2,#0
bne _wait2s$
str r1,[r0,#40] @ turn on GPIO 17 (turn off LED)
mov r2,#0x1F0000 @ 0x1F0000 is some number we want to decrement to 0
_wait3s$:
sub r2,#1
cmp r2,#0
bne _wait3s$
str r1,[r0,#28] @ turn off GPIO 17 (turn on LED)
mov r2,#0x1F0000
_wait4s$:
sub r2,#1
cmp r2,#0
bne _wait4s$
str r1,[r0,#40] @ turn on GPIO 17 (turn off LED)
mov r2,#0x1F0000
_wait5s$:
sub r2,#1
cmp r2,#0
bne _wait5s$
Projektarbeit GTI 20.01.2018 Martina Schwab, Thomas Burri,
Daniel Zimmermann
str r1,[r0,#28]
mov r2,#0x1F0000
_wait6s$:
sub r2,#1
cmp r2,#0
bne _wait6s$
str r1,[r0,#40] @ turn on GPIO 17 (turn off LED)
mov r2,#0x1F0000
_wait7s$:
sub r2,#1
cmp r2,#0
bne _wait7s$
str r1,[r0,#28] @ turn off GPIO 17 (turn on LED)
mov r2,#0x4F0000
_wait1l$:
sub r2,#1
cmp r2,#0
bne _wait1l$
str r1,[r0,#40] @ turn on GPIO 17 (turn off LED)
mov r2,#0x1F0000
_wait2l$:
sub r2,#1
cmp r2,#0
bne _wait2l$
str r1,[r0,#28] @ turn off GPIO 17 (turn on LED)
mov r2,#0x4F0000
_wait3l$:
sub r2,#1
cmp r2,#0
bne _wait3l$
str r1,[r0,#40] @ turn on GPIO 17 (turn off LED)
mov r2,#0x1F0000
_wait4l$:
sub r2,#1
cmp r2,#0
bne _wait4l$
mov r2,#0
str r1,[r0,#28] @ turn off GPIO 17 (turn on LED)
mov r2,#0x4F0000
_wait5l$:
sub r2,#1
cmp r2,#0
bne _wait5l$
mov r2,#0
str r1,[r0,#40] @ turn on GPIO 17 (turn off LED)
mov r2,#0x1F0000
_wait6l$:
sub r2,#1
cmp r2,#0
bne _wait6l$
mov r2,#0
str r1,[r0,#28] @ turn off GPIO 17 (turn on LED)
mov r2,#0x1F0000
_wait8s$:
sub r2,#1
cmp r2,#0
bne _wait8s$
mov r2,#0
str r1,[r0,#40] @ turn on GPIO 17 (turn off LED)
mov r2,#0x1F0000
_wait9s$:
sub r2,#1
cmp r2,#0
bne _wait9s$
mov r2,#0
str r1,[r0,#28] @ turn off GPIO 17 (turn on LED)
mov r2,#0x1F0000
_wait10s$:
sub r2,#1
cmp r2,#0
bne _wait10s$
mov r2,#0
str r1,[r0,#40] @ turn on GPIO 17 (turn off LED)
mov r2,#0x1F0000
_wait11s$:
sub r2,#1
cmp r2,#0
bne _wait11s$
mov r2,#0
str r1,[r0,#28] @ turn off GPIO 17 (turn on LED)
mov r2,#0x1F0000
_wait12s$:
sub r2,#1
cmp r2,#0
bne _wait12s$
mov r2,#0
str r1,[r0,#40] @ turn on GPIO 17 (turn off LED)
mov r2,#0x1F0000
_wait13s$:
sub r2,#1
Projektarbeit GTI 20.01.2018 Martina Schwab, Thomas Burri,
Daniel Zimmermann
cmp r2,#0
bne _wait13s$
b _loop$