stm32mp157aaa裸机开发学习之led灯亮灭

物联网 2023-07-11 18:06:35 阅读次数: 0

asm-led.S

.text 
.global _start
_start: 
	/**********LED1点灯**********/
	/**********RCC章节初始化**********/
RCC_INIT:
	@通过RCC_MP_AHB4ENSETR寄存器使能GPIOE组控制器 0x50000A28[4] = 1
	ldr r0,=0x50000A28 @LED1 GPIOE10 LED3 GPIOE8
	ldr r1,[r0]
	orr r1,r1,#(0x1 << 4)
	str r1,[r0]
	@通过RCC_MP_AHB4ENSETR寄存器使能GPIOF组控制器 0x50000A28[5] = 1
	ldr r0,=0x50000A28
	ldr r1,[r0]
	orr r1,r1,#(0x1 << 5)
	str r1,[r0]
	/**********GPIO节初始化**********/
LED1_INIT:
	@1.通过GPIOE_MODER寄存器设置PE10引脚为输出模式 0x50006000[21:20] = 01
	ldr r0,=0x50006000
	ldr r1,[r0]
	and r1,r1,#(~(0x3 << 20))
	orr r1,r1,#(0x1 << 20)
	str r1,[r0]
	@2.通过GPIOE_OTYPER寄存器设置PE10引脚为推挽输出类型 0x50006004[10] = 0
	ldr r0,=0x50006004
	ldr r1,[r0]
	and r1,r1,#(~(0x1 << 10))
	str r1,[r0]
	@3.通过GPIOE_OSPEEDR寄存器设置PE10引脚为低速输出模式 0x50006008[21:20] = 00
	ldr r0,=0x50006008
	ldr r1,[r0]
	and r1,r1,#(~(0x3 << 20))
	str r1,[r0]
	@4.通过GPIOE_PUPDR寄存器设置PE10引脚禁止上下拉电阻 0x5000600c[21:20] = 00
	ldr r0,=0x5000600c
	ldr r1,[r0]
	and r1,r1,#(~(0x3 << 20))
	str r1,[r0]

LED2_INIT:
	@1.通过GPIOE_MODER寄存器设置PF10引脚为输出模式 0x50007000[21:20] = 01
	ldr r0,=0x50007000
	ldr r1,[r0]
	and r1,r1,#(~(0x3 << 20))
	orr r1,r1,#(0x1 << 20)
	str r1,[r0]
	@2.通过GPIOE_OTYPER寄存器设置PF10引脚为推挽输出类型 0x50007004[10] = 0
	ldr r0,=0x50007004
	ldr r1,[r0]
	and r1,r1,#(~(0x1 << 10))
	str r1,[r0]
	@3.通过GPIOE_OSPEEDR寄存器设置PF10引脚为低速输出模式 0x50007008[21:20] = 00
	ldr r0,=0x50007008
	ldr r1,[r0]
	and r1,r1,#(~(0x3 << 20))
	str r1,[r0]
	@4.通过GPIOE_PUPDR寄存器设置PF10引脚禁止上下拉电阻 0x5000700c[21:20] = 00
	ldr r0,=0x5000700c
	ldr r1,[r0]
	and r1,r1,#(~(0x3 << 20))
	str r1,[r0]

LED3_INIT:
	@1.通过GPIOE_MODER寄存器设置PE8引脚为输出模式 0x50006000[17:16] = 01
	ldr r0,=0x50006000
	ldr r1,[r0]
	and r1,r1,#(~(0x3 << 16))
	orr r1,r1,#(0x1 << 16)
	str r1,[r0]
	@2.通过GPIOE_OTYPER寄存器设置PE8引脚为推挽输出类型 0x50006004[8] = 0
	ldr r0,=0x50006004
	ldr r1,[r0]
	and r1,r1,#(~(0x1 << 8))
	str r1,[r0]
	@3.通过GPIOE_OSPEEDR寄存器设置PE8引脚为低速输出模式 0x50006008[17:16] = 00
	ldr r0,=0x50006008
	ldr r1,[r0]
	and r1,r1,#(~(0x3 << 16))
	str r1,[r0]
	@4.通过GPIOE_PUPDR寄存器设置PE8引脚禁止上下拉电阻 0x5000600c[17:16] = 00
	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:
	@通过GPIOE_ODR寄存器设置PE10引脚输出高电平 0x50006014[10] = 1
	ldr r0,=0x50006014
	ldr r1,[r0]
	orr r1,r1,#((0x1 << 10))
	str r1,[r0]
	mov pc,lr


LED1_OFF:
	@通过GPIOE_ODR寄存器设置PE10引脚为低电平 0x50006014[10] = 0
	ldr r0,=0x50006014
	ldr r1,[r0]
	bic r1,r1,#(0x1 << 10)
	str r1,[r0]
	mov pc,lr

LED2_ON:
	@通过GPIOE_ODR寄存器设置PF10引脚输出高电平 0x50007014[10] = 1
	ldr r0,=0x50007014
	ldr r1,[r0]
	orr r1,r1,#((0x1 << 10))
	str r1,[r0]
	mov pc,lr


LED2_OFF:
	@通过GPIOE_ODR寄存器设置PF10引脚为低电平 0x50007014[10] = 0
	ldr r0,=0x50007014
	ldr r1,[r0]
	bic r1,r1,#(0x1 << 10)
	str r1,[r0]
	mov pc,lr

LED3_ON:
	@通过GPIOE_ODR寄存器设置PE8引脚输出高电平 0x50006014[8] = 1
	ldr r0,=0x50006014
	ldr r1,[r0]
	orr r1,r1,#((0x1 << 8))
	str r1,[r0]
	mov pc,lr


LED3_OFF:
	@通过GPIOE_ODR寄存器设置PE8引脚为低电平 0x50006014[8] = 0
	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

C语言工程项目代码
led.h

#ifndef __LED_H__
#define __LED_H__
//声明一个结构体
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)
//rcc 初始化
void rcc_init();
//led1 初始化
void led1_init();
//led2 初始化
void led2_init();
//led3 初始化
void led3_init();
//led1 灯打开
void led1_on();
//led1灯关闭
void led1_off();
//led2 灯打开
void led2_on();
//led2灯关闭
void led2_off();
//led3 灯打开
void led3_on();
//led3灯关闭
void led3_off();



#endif

main.c

#include"include/led.h"
//extern void printf(const char *fmt, ...);
void delay_ms(int ms)
{
    
    
	int i,j;
	for(i = 0; i < ms;i++)
		for (j = 0; j < 1800; j++);
}


int main()
{
    
    
	rcc_init();
	led1_init(); // LED1灯初始化
	led2_init(); // LED2灯初始化
	led3_init(); // LED3灯初始化
	while(1)
	{
    
    
		led1_on();
		delay_ms(500);
		led1_off();
		delay_ms(500);
		led2_on();
		delay_ms(500);
		led2_off();
		delay_ms(500);
		led3_on();
		delay_ms(500);
		led3_off();
		delay_ms(500);
		led1_on();
		led2_on();
		led3_on();
		delay_ms(500);
		led1_off();
		led2_off();
		led3_off();
		delay_ms(500);
		led1_on();
		led3_on();
		delay_ms(500);
		led1_off();
		led3_off();
		delay_ms(500);
		led3_on();
		delay_ms(500);
		led3_off();
		delay_ms(500);
		led2_on();
		delay_ms(500);
		led2_off();
		delay_ms(500);
		led1_on();
		delay_ms(500);
		led1_off();
		delay_ms(500);
	}
	return 0;
}

led.c

#include"../include/led.h"

/*
 *led1 引脚pe10
 *led2 引脚pf10
 *led3 引脚pe8
 */
/*rcc初始化
 * function:    rcc_init pe10,pf10,pe8
 * @param [ in]  
 * @param [out] 
 * @return      
 */
void rcc_init(){
    
    
		*(volatile int *)0x50000A28 |=(0x3 << 4);
}

/*led1灯初始化
 * function:    led1_init pe10
 * @param [ in] 
 * @param [out] 
 * @return      
 */
void led1_init(){
    
    
	GPIOE->MODER  &= (~(0x3 << 20));
	GPIOE->MODER |= (0x1 << 20);
	GPIOE->OTYPER &= (~(0x1 << 10));
	GPIOE->OSPEEDR &= (~(0x3 << 20));
	GPIOE->PUPDR &= (~(0x3 << 20));
}
/*led2灯初始化
 * function:    led2_init pf10
 * @param [ in] 
 * @param [out] 
 * @return      
 */
void led2_init(){
    
    
	GPIOF->MODER &= (~(0x3 << 20));
	GPIOF->MODER |= (0x1 << 20);
	GPIOF->OTYPER &= (~(0x1 << 10));
	GPIOF->OSPEEDR &= (~(0x3 << 20));
	GPIOF->PUPDR &= (~(0x3 << 20));
}
/*led3灯初始化
 * function:    led3_init pe8
 * @param [ in] 
 * @param [out] 
 * @return      
 */
void led3_init(){
    
    
	GPIOE->MODER &= (~(0x3 << 16));
	GPIOE->MODER |= (0x1 << 16);
	GPIOE->OTYPER &= (~(0x1 << 8));
	GPIOE->OSPEEDR &= (~(0x3 << 16));
	GPIOE->PUPDR &= (~(0x3 << 16));
}
/*led1 灯打开
 * function:  led1_on
 * @param [ in] 
 * @param [out] 
 * @return      
 */
void led1_on(){
    
    
	GPIOE->ODR |= (0x1 << 10);	
}
/*led1 灯关闭
 * function:  led1_off
 * @param [ in] 
 * @param [out] 
 * @return      
 */
void led1_off(){
    
    
	GPIOE->ODR &= (~(0x1 << 10));
}
/*led2 灯打开
 * function:  led2_on
 * @param [ in] 
 * @param [out] 
 * @return      
 */
void led2_on(){
    
    
	GPIOF->ODR |= (0x1 << 10);	
}
/*led2 灯关闭
 * function:  led2_off
 * @param [ in] 
 * @param [out] 
 * @return      
 */
void led2_off(){
    
    
	GPIOF->ODR &= (~(0x1 << 10));
}
/*led3 灯打开
 * function:  led3_on
 * @param [ in] 
 * @param [out] 
 * @return      
 */
void led3_on(){
    
    
	GPIOE->ODR |= (0x1 << 8);	
}
/* led3 灯关闭
 * function:  led3_off
 * @param [ in] 
 * @param [out] 
 * @return      
 */
void led3_off(){
    
    
	GPIOE->ODR &= (~(0x1 << 8));
}

在这里插入图片描述

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