ARM day5 (点灯实验汇编C)

汇编

.text 
.global _start
_start: /**********LED1点灯**************//**********RCC草节初始化**************///1.通过RCC_MP_AHB4ENSETR寄存器使能GPIOE组控制器0x50000A28[4] = 1ldr r0,=0x50000A28ldr r1,[r0]orr r1,r1,#(0x1 << 4)str r1,[r0]//1.通过RCC_MP_AHB4ENSETR寄存器使能GPIOF组控制器0x50000A28[5] = 1ldr r0,=0x50000A28ldr r1,[r0]orr r1,r1,#(0x1 << 5)str r1,[r0]/*********GPIO章节初始化*************/LED1_INIT:@1.通过GPIOE_MODER寄存器设置PE10引脚为输出模式0x50006000[21:20] = 01ldr r0,=0x50006000ldr 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]= 0ldr r0,=0x50006004ldr r1,[r0]and r1,r1,#(~(0x1 << 10))str r1,[r0]@3.通过GPIOE_OSPBEDR寄存器设置PE10引脚为低速输出模式0x50006008[21:20] = 00ldr r0,=0x50006008ldr 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] = 00ldr r0,=0x5000600cldr r1,[r0]and r1,r1,#(~(0x3 << 20))str r1,[r0]LED2_INIT:@1.通过GPIOF_MODER寄存器设置PF10引脚为输出模式0x50007000[21:20] = 01ldr r0,=0x50007000ldr r1,[r0]and r1,r1,#(~(0x3 << 20))orr r1,r1,#(0x1 << 20)str r1,[r0]@2.通过GPIOF_OTYPER寄存器设置PF10引脚为推挽输出类型0x50007004[10]= 0ldr r0,=0x50007004ldr r1,[r0]and r1,r1,#(~(0x1 << 10))str r1,[r0]@3.通过GPIOF_OSPBEDR寄存器设置PF10引脚为低速输出模式0x50007008[21:20] = 00ldr r0,=0x50007008ldr r1,[r0]and r1,r1,#(~(0x3 << 20))str r1,[r0]@4.通过GPIOF_PUPDR寄存器设置PF10引脚禁止上下拉电阻0x5000700C[21:20] = 00ldr r0,=0x5000700cldr 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] = 01ldr r0,=0x50006000ldr 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]= 0ldr r0,=0x50006004ldr r1,[r0]and r1,r1,#(~(0x1 << 8))str r1,[r0]@3.通过GPIOE_OSPBEDR寄存器设置PE8引脚为低速输出模式0x50006008[17:16] = 00ldr r0,=0x50006008ldr 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] = 00ldr r0,=0x5000600cldr r1,[r0]and r1,r1,#(~(0x3 << 16))str r1,[r0]
loop:bl LED1_ONbl delay_1sbl LED1_OFFbl LED2_ONbl delay_1sbl LED2_OFFbl LED3_ONbl delay_1sbl LED3_OFFb loopLED1_ON:@通过GPIOE_ODR寄存器设置PE10引脚输出高电平0x50006014[10] = 1ldr r0,=0x50006014ldr r1,[r0]orr r1,r1,#(0x1 << 10)str r1,[r0]mov pc,lrLED1_OFF:@通过GPIOE_ODR寄存器设置PE10引脚输出低电平0x50006014[10] = 0ldr r0,=0x50006014ldr r1,[r0]and r1,r1,#(~(0x1 << 10))str r1,[r0]mov pc,lrLED2_ON:@通过GPIOF_ODR寄存器设置PF10引脚输出高电平0x50007014[10] = 1ldr r0,=0x50007014ldr r1,[r0]orr r1,r1,#(0x1 << 10)str r1,[r0]mov pc,lrLED2_OFF:@通过GPIOF_ODR寄存器设置PF10引脚输出低电平0x50007014[10] = 0ldr r0,=0x50007014ldr r1,[r0]and r1,r1,#(~(0x1 << 10))str r1,[r0]mov pc,lrLED3_ON:@通过GPIOE_ODR寄存器设置PE8引脚输出高电平0x50006014[8] = 1ldr r0,=0x50006014ldr r1,[r0]orr r1,r1,#(0x1 << 8)str r1,[r0]mov pc,lrLED3_OFF:@通过GPIOE_ODR寄存器设置PE8引脚输出低电平0x50006014[8] = 0ldr r0,=0x50006014ldr r1,[r0]and 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

led.h

#ifndef __LED_H__
#define __LED_H__//声明一个结构体
typedef struct pio
{unsigned int MODER;   //00unsigned int OTYPER;  //04unsigned int OSPEEDR; //08unsigned int PUPDR;   //0Cunsigned int IDR;     //10unsigned int ODR;     //14
}gpio_t;#define GPIOE ((volatile gpio_t*)0x50006000)
#define GPIOF ((volatile gpio_t*)0x50007000)void led1_init();
void LED1_on();
void led1_off();void led2_init();
void LED2_on();
void led2_off();void led3_init();
void LED3_on();
void led3_off();#endif

led.c

#include "led.h"void led1_init()
{GPIOE->MODER &= (~(0x3 << 20));GPIOE->MODER |= (0x1 << 20);GPIOE->OTYPER &=(~(0x1 << 10));GPIOE->OSPEEDR &= (~(0x3 << 20));GPIOE->PUPDR &= (~(0X3 << 20));
}void LED1_on()
{GPIOE->ODR |= (0x1 << 10);
}void led1_off()
{GPIOE->ODR &= (~(0x1 << 10));
}void led2_init()
{GPIOF->MODER &= (~(0x3 << 20));GPIOF->MODER |= (0x1 << 20);GPIOF->OTYPER &=(~(0x1 << 10));GPIOF->OSPEEDR &= (~(0x3 << 20));GPIOF->PUPDR &= (~(0X3 << 20));
}void LED2_on()
{GPIOF->ODR |= (0x1 << 10);
}void led2_off()
{GPIOF->ODR &= (~(0x1 << 10));
}void led3_init()
{GPIOE->MODER &= (~(0x3 << 16));GPIOE->MODER |= (0x1 << 16);GPIOE->OTYPER &=(~(0x1 << 8));GPIOE->OSPEEDR &= (~(0x3 << 16));GPIOE->PUPDR &= (~(0X3 << 16));}void LED3_on()
{GPIOE->ODR |= (0x1 << 8);
}void led3_off()
{GPIOE->ODR &= (~(0x1 << 8));
}

main.c

#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()
{*(volatile unsigned int *)0x50000A28 |= (0x3 << 4);led1_init(); // LED灯初始化led2_init();led3_init();while(1){LED1_on();delay_ms(500);led1_off();LED2_on();delay_ms(500);led2_off();LED3_on();delay_ms(500);led3_off();}return 0;
}