assembly_code.s

.thumb
.syntax unified

.include "gpio_constants.s"     // Register-adresser og konstanter for GPIO

.global GPIO_ODD_IRQHandler
.thumb_func

.text
	.global Start
	
Start:

	LDR R0, =GPIO_BASE
	MOV R1, #0b00000100
	STR R1, [R0, #PORT_SIZE * PORT_E + GPIO_PORT_DOUTSET]

	LOOP_START:
		BNE LOOP_START

	GPIO_ODD_IRQHandler:
		MOV R2, #0b00000100
		STR R2, [R0, #PORT_SIZE * PORT_E + GPIO_PORT_DOUTTGL]
		BX LR
		NOP