.section .data
.align 2
pinNumber:      .word   16
.section .init
.globl _start
_start:
@       mov r0, $16
@ in the way shown above it works, in the way below does not

        ldr r3, =pinNumber
        ldr r0, [r3]            @ setGpioFunct takes pin number in r0
        mov r1, $1              @ and desired function in r1
        bl setGpioFunct

        bl getGpioAddr

@       mov r0, $16
@ the same situation

        ldr r3, =pinNumber
        ldr r0, [r3]
        bl clearPin             @ turning off pin turns on led,
                                @ takes pin number in r0
loop:
        b loop