思维导图

 

汇编代码：

.text 
.global _start
_start: 

	/**********LED1点灯**************/
RCC_INIT_E:
	ldr r0,=0x50000A28
	ldr r1,[r0]
	orr r1,r1,#(0x1 << 4)
	str r1,[r0]

RCC_INIT_F:
	ldr r0,=0x50000A28
	ldr r1,[r0]
	orr r1,r1,#(0x1 << 5)
	str r1,[r0]

LED_INIT:
/*********************************/
	ldr r0,=0x50006000
	ldr r1,[r0]
	and r1,r1,#(~(0x3 << 20))
	orr r1,r1,#(0x1 << 20)
	str r1,[r0]

	ldr r0,=0x50007000
	ldr r1,[r0]
	and r1,r1,#(~(0x3 << 20))
	orr r1,r1,#(0x1 << 20)
	str r1,[r0]

	ldr r0,=0x50006000
	ldr r1,[r0]
	and r1,r1,#(~(0x3 << 16))
	orr r1,r1,#(0x1 << 16)
	str r1,[r0]

/*********************************/

	ldr r0,=0x50006004
	ldr r1,[r0]
	bic r1,r1,#(0x1 << 10)
	str r1,[r0]

	ldr r0,=0x50007004
	ldr r1,[r0]
	bic r1,r1,#(0x1 << 10)
	str r1,[r0]

	ldr r0,=0x50006004
	ldr r1,[r0]
	bic r1,r1,#(0x1 << 8)
	str r1,[r0]

/*********************************/

	ldr r0,=0x50006008
	ldr r1,[r0]
	and r1,r1,#(~(0x3 << 20))
	str r1,[r0]

	ldr r0,=0x50007008
	ldr r1,[r0]
	and r1,r1,#(~(0x3 << 20))
	str r1,[r0]

	ldr r0,=0x50006008
	ldr r1,[r0]
	and r1,r1,#(~(0x3 << 16))
	str r1,[r0]

/**********************************/

	ldr r0,=0x5000600C
	ldr r1,[r0]
	and r1,r1,#(~(0x3 << 20))
	str r1,[r0]

	ldr r0,=0x5000700C
	ldr r1,[r0]
	and r1,r1,#(~(0x3 << 20))
	str r1,[r0]

	ldr r0,=0x5000600C
	ldr r1,[r0]
	and r1,r1,#(~(0x3 << 16))
	str r1,[r0]

/***********************************/

loop:
	bl LED1_ON
	bl delay_1s
    bl LED1_OFF
	bl delay_1s
	bl LED2_ON
	bl delay_1s
	bl LED2_OFF
	bl delay_1s
	bl LED3_ON
	bl delay_1s
    bl LED3_OFF
	bl delay_1s
	b loop

/*******************************/

LED1_ON:
	ldr r0,=0x50006014
	ldr r1,[r0]
	orr r1,r1,#(0x1 << 10)
	str r1,[r0]
	mov pc,lr

LED1_OFF:
	ldr r0,=0x50006014
	ldr r1,[r0]
	bic r1,r1,#(0x1 << 10)
	str r1,[r0]
	mov pc,lr

/*******************************/

LED2_ON:
	ldr r0,=0x50007014
	ldr r1,[r0]
	orr r1,r1,#(0x1 << 10)
	str r1,[r0]
	mov pc,lr

LED2_OFF:
	ldr r0,=0x50007014
	ldr r1,[r0]
	bic r1,r1,#(0x1 << 10)
	str r1,[r0]
	mov pc,lr

/*******************************/

LED3_ON:
	ldr r0,=0x50006014
	ldr r1,[r0]
	orr r1,r1,#(0x1 << 8)
	str r1,[r0]
	mov pc,lr

LED3_OFF:
	ldr r0,=0x50006014
	ldr r1,[r0]
	bic r1,r1,#(0x1 << 8)
	str r1,[r0]
	mov pc,lr




@ 大概1s的延时函数
delay_1s:
	mov r3, #0x10000000
	mm:
	cmp r3, #0
	subne r3, r3, #1
	bne mm
	mov pc, lr

.end

效果视频：