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.section .text
.align 2
.global setup_GPIO
.include "memory_map.inc"
.include "gpio.inc"
setup_GPIO:
addi sp, sp, -16 # Allocate stack frame
sw ra, 12(sp) # save return address to the stack
li t0, GPIO_CTRL_ADDR # load base GPIO address
li t1, GPIO_RGB_PINS # get RGB offsets
sw t1, GPIO_OUTPUT_EN(t0) # enable output on the RGB pins
sw t1, GPIO_OUTPUT_XOR(t0) # set the RGB pins to active high
sw x0, GPIO_OUTPUT_VAL(t0) # set all pins to 0
lw ra, 12(sp) # load return address
addi sp, sp, 16 # deallocate stack frame
ret
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