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[ex28] ASM_LED_ON

Study 2025-03-18 - -

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문제 설명

	.syntax unified
	.thumb

	.text

	.word	0x20005000
	.word	__start

	.global	__start
  	.type 	__start, %function
__start:

	.equ GPIOB_CRH,	0x40010C04
	.equ GPIOB_ODR,	0x40010C0C
	.equ APB2ENR,  	0x40021018

	@ 이부분은 수정하지 말 것 @

	LDR   r0, =APB2ENR
	LDR   r1, =0x8
	STR   r1, [r0]

	@ 여기부터 코드 작성 @

	b		.
			
	.end

정답 코드

	.syntax unified
	.thumb

	.text

	.word	0x20005000
	.word	__start

	.global	__start
  	.type 	__start, %function
__start:

	.equ GPIOB_CRH,	0x40010C04
	.equ GPIOB_ODR,	0x40010C0C
	.equ APB2ENR,  	0x40021018

	LDR   r0, =APB2ENR
	LDR   r1, =0x8
	STR   r1, [r0]

	LDR   r0, =GPIOB_CRH
	LDR   r1, =0x66
	STR   r1, [r0]

	LDR   r0, =GPIOB_ODR
	LDR   r1, =0x0100
	STR   r1, [r0]

	b		.
			
	.end

메모

printf 내부의 \n 습관화 필요