arm-day2 - 技术栈

汇编实现三个灯循环点亮

cpp 复制代码

.text 
.global _start
_start: 
	/**********LED1点灯**************/
RCC_TNIT:
	ldr r0,=0x50000a28
	ldr r1,[r0]
	orr r1,r1,#(0x1 << 4)
	orr r1,r1,#(0x1 << 5)
	str r1,[r0]

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

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


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


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

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

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


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

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


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



	@禁止电阻
	ldr r0,=0x5000600c
	ldr r1,[r0]
	and r1,r1,#(~(0x3 << 20))
	str r1,[r0]
	and r1,r1,#(~(0x3 << 16))
	str r1,[r0]


	ldr r0,=0x5000700c
	ldr r1,[r0]
	and r1,r1,#(~(0x3 << 20))
	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
LED2_ON:
	ldr r0,=0x50007014
	ldr r1,[r0]
	orr 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



LED1_OFF:
	ldr r0,=0x50006014
	ldr r1,[r0]
	bic 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_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

用c语言实现

1：定义一个结构体

2：宏定义一下

cpp 复制代码

typedef struct{
    unsigned int MODER; //00
    unsigned int OTYPER;//04
    unsigned int OSPEEDR; //08
    unsigned int PUPDR;//0C
    unsigned int IDR;//10
    unsigned int ODR;//14
}gpio_t;
#define GPIOE ((volatile gpio_t*)0x50006000)
#define GPIOF ((volatile gpio_t*)0x50007000)

3：调用时用 GPIOE->MODER = GPIOE->MODER |= (0X1 <<20 );

用m4控制

1：main函数写入

2：分步dbug

cpp 复制代码

while (1)
  {
		HAL_GPIO_WritePin (GPIOE, GPIO_PIN_10, GPIO_PIN_SET);
		HAL_Delay(500);
		HAL_GPIO_WritePin (GPIOE, GPIO_PIN_10, GPIO_PIN_RESET);
		HAL_Delay(500);
		
		HAL_GPIO_WritePin (GPIOF, GPIO_PIN_10, GPIO_PIN_SET);
		HAL_Delay(500);
		HAL_GPIO_WritePin (GPIOF, GPIO_PIN_10, GPIO_PIN_RESET);
		HAL_Delay(500);
		
		HAL_GPIO_WritePin (GPIOE, GPIO_PIN_8, GPIO_PIN_SET);
		HAL_Delay(500);
		HAL_GPIO_WritePin (GPIOE, GPIO_PIN_8, GPIO_PIN_RESET);
		HAL_Delay(500);
}