Crotex_A7核点灯实验 c语言实现点灯 流水灯 以及汇编语言实现点灯 流水灯
1、汇编实现流水灯
.text
.global _start
_start:
/**********LED1点灯--->10**************/
bl RCC_INET
bl LED1_INET
loop:
bl LED1_ON
bl delay_1s
bl LED1_OFF
bl LED2_ON
bl delay_1s
bl LED2_OFF
bl LED3_ON
bl delay_1s
bl LED3_OFF
b loop
/**********RCC章节初始化**************/
RCC_INET:
@1.使能GPIOE组控制器，通过RCC_MP_AHB$ENSETR寄存器设置GPIOE组使能 0x50000A28[4] = 1
ldr r0,=0x50000A28
ldr r1,[r0]
orr r1,r1,#(0x1 << 4)
orr r1,r1,#(0x1 << 5)
str r1,[r0]
mov pc, lr
/**********GPIO章节初始化**************/
LED1_INET:
@LED_1和LED_3的初始化
@1.通过GPIOE_MODER寄存器，设置PE10引脚为输出模式0x50006000[21:20] = 01
@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]
orr r1,r1,#(0x1 << 20)
and r1,r1,#(~(0x1 << 21))
orr r1,r1,#(0x1 << 16)
and r1,r1,#(~(0x1 << 17))
str r1,[r0]
@2.通过GPIOE_OTYPER寄存器，设置PE10引脚为推晚输出类型0x50006004[10] = 0
@2.通过GPIOE_OTYPER寄存器，设置PE8引脚为推晚输出类型0x50006004[8] = 0
ldr r0,=0x50006004
ldr r1,[r0]
and r1,r1,#(~(0x1 << 10))
and r1,r1,#(~(0x1 << 8))
str r1,[r0]
@3.通过GPIOE_OSPEEDR寄存器，设置PE10引脚为低速输出0x50006008[21:20] = 00
@3.通过GPIOE_OSPEEDR寄存器，设置PE8引脚为低速输出0x50006008[17:16] = 00
ldr r0,=0x50006008
ldr r1,[r0]
and r1,r1,#(~(0x3 << 20))
and r1,r1,#(~(0x3 << 16))
str r1,[r0]
@4.通过GPIOE_PUPDR寄存器，设置PE10引脚为输出模式0x50006000C[21:20] = 00
@4.通过GPIOE_PUPDR寄存器，设置PE8引脚为输出模式0x50006000C[17:16] = 00
ldr r0,=0x5000600C
ldr r1,[r0]
and r1,r1,#(~(0x3 << 20))
and r1,r1,#(~(0x3 << 16))
str r1,[r0]
@LED_2的初始化
@1.通过GPIOF_MODER寄存器，设置PF10引脚为输出模式0x50007000[21:20] = 01
ldr r0,=0x50007000
ldr r1,[r0]
orr r1,r1,#(0x1 << 20)
and r1,r1,#(~(0x1 << 21))
str r1,[r0]
@2.通过GPIOF_OTYPER寄存器，设置PF10引脚为推晚输出类型0x50007004[10] = 0
ldr r0,=0x50007004
ldr r1,[r0]
and r1,r1,#(~(0x1 << 10))
str r1,[r0]
@3.通过GPIOF_OSPEEDR寄存器，设置PF10引脚为低速输出0x50007008[21:20] = 00
ldr r0,=0x50007008
ldr r1,[r0]
and r1,r1,#(~(0x3 << 20))
str r1,[r0]
@4.通过GPIOF_PUPDR寄存器，设置PF10引脚为输出模式0x50007000C[21:20] = 00
ldr r0,=0x5000700C
ldr r1,[r0]
and r1,r1,#(~(0x3 << 20))
str r1,[r0]
mov pc, lr
/**********LED1点亮**************/
LED1_ON:
@1.通过GPIO_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熄灭**************/
LED1_OFF:
@1.通过GPIO_ODR寄存器，设置PE10引脚输出低电平 0x50006014[10] = 0
ldr r0,=0x50006014
ldr r1,[r0]
and 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]
and 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]
and r1,r1,#(~(0x1 << 8))
str r1,[r0]
mov pc, lr
@ 大概1s的延时函数
delay_1s:
mov r3, #0x01000000
mm:
cmp r3, #0
subne r3, r3, #1
bne mm
mov pc, lr
.end
2、c语言实现流水灯
//led.h
#ifndef __LED_H__
#define __LED_H__
typedef struct{
volatile unsigned int MODER;
volatile unsigned int OTYPER;
volatile unsigned int OSPEEDR;
volatile unsigned int PUPDR;
volatile unsigned int IDR;
volatile unsigned int ODR;
}gpio_t;
#define GPIOE ((gpio_t*)0x50006000)
#define GPIOF ((gpio_t*)0x50007000)
#define RCC_MP_AHB4_ENSETR (*(volatile unsigned int*)0x50000A28)
//LED1--->PE10
//RCC/GPIO章节初始化
void led1_rcc_gpio_init();
//LED1点亮
void led1_on();
//LED1熄灭
void led1_off();
//LED2--->PF10
//RCC/GPIO章节初始化
void led2_rcc_gpio_init();
//LED1点亮
void led2_on();
//LED1熄灭
void led2_off();
//LED3--->PE8
//RCC/GPIO章节初始化
void led3_rcc_gpio_init();
//LED3点亮
void led3_on();
//LED1熄灭
void led3_off();
#endif
//led.c
#include "led.h"
//LED1--->PE10
//RCC/GPIO章节初始化
void led1_rcc_gpio_init()
{
//1.使能GPIOE组控制器，通过RCC_MP_AHB$ENSETR寄存器设置GPIOE组使能 0x50000A28[4] = 1
RCC_MP_AHB4_ENSETR |= (0x1 << 4);
//LED1的初始化
//1.通过GPIOE_MODER寄存器，设置PE10引脚为输出模式0x50006000[21:20] = 01
GPIOE->MODER |= (0x1 << 20);
GPIOE->MODER &= (~(0x1 << 21));
//2.通过GPIOE_OTYPER寄存器，设置PE10引脚为推晚输出类型0x50006004[10] = 0
GPIOE->OTYPER &= (~(0x1 << 10));
//3.通过GPIOE_OSPEEDR寄存器，设置PE10引脚为低速输出0x50006008[21:20] = 00
GPIOE->OSPEEDR &= (~(0x3 << 20));
//4.通过GPIOE_PUPDR寄存器，设置PE10引脚为输出模式0x50006000C[21:20] = 00
GPIOE->PUPDR &=(~(0x3 << 20));
}
//LED1点亮
void led1_on()
{
//1.通过GPIO_ODR寄存器，设置PE10引脚输出高电平 0x50006014[10] = 1
GPIOE->ODR |= (0x1 << 10);
}
//LED1熄灭
void led1_off()
{
//2.通过GPIO_ODR寄存器，设置PE10引脚输出高电平 0x50006014[10] = 0
GPIOE->ODR &= (~(0x1 << 10));
}
//LED2--->PF10
void led2_rcc_gpio_init()
{
//1.使能GPIOF组控制器，通过RCC_MP_AHB$ENSETR寄存器设置GPIOE组使能 0x50000A28[5] = 1
RCC_MP_AHB4_ENSETR |= (0x1 << 5);
//LED2的初始化
//1.通过GPIOF_MODER寄存器，设置PF10引脚为输出模式0x50007000[21:20] = 01
GPIOF->MODER |= (0x1 << 20);
GPIOF->MODER &= (~(0x1 << 21));
//2.通过GPIOF_OTYPER寄存器，设置PF10引脚为推晚输出类型0x50007004[10] = 0
GPIOF->OTYPER &= (~(0x1 << 10));
//3.通过GPIOF_OSPEEDR寄存器，设置PF10引脚为低速输出0x50007008[21:20] = 00
GPIOF->OSPEEDR &= (~(0x3 << 20));
//4.通过GPIOF_PUPDR寄存器，设置PF10引脚为输出模式0x50007000C[21:20] = 00
GPIOF->PUPDR &=(~(0x3 << 20));
}
//LED2点亮
void led2_on()
{
//1.通过GPIO_ODR寄存器，设置PF10引脚输出高电平 0x50006014[10] = 1
GPIOF->ODR |= (0x1 << 10);
}
//LED2熄灭
void led2_off()
{
//2.通过GPIO_ODR寄存器，设置PF10引脚输出高电平 0x50006014[10] = 0
GPIOF->ODR &= (~(0x1 << 10));
}
//LED3--->PE8
//RCC/GPIO章节初始化
void led3_rcc_gpio_init()
{
//1.使能GPIOE组控制器，通过RCC_MP_AHB$ENSETR寄存器设置GPIOE组使能 0x50000A28[4] = 1
RCC_MP_AHB4_ENSETR |= (0x1 << 4);
//LED1的初始化
//1.通过GPIOE_MODER寄存器，设置PE10引脚为输出模式0x50006000[17:16] = 01
GPIOE->MODER |= (0x1 << 16);
GPIOE->MODER &= (~(0x1 << 17));
//2.通过GPIOE_OTYPER寄存器，设置PE10引脚为推晚输出类型0x50006004[8] = 0
GPIOE->OTYPER &= (~(0x1 << 8));
//3.通过GPIOE_OSPEEDR寄存器，设置PE10引脚为低速输出0x50006008[17:16] = 00
GPIOE->OSPEEDR &= (~(0x3 << 16));
//4.通过GPIOE_PUPDR寄存器，设置PE10引脚为输出模式0x50006000C[17:16] = 00
GPIOE->PUPDR &=(~(0x3 << 16));
}
//LED3点亮
void led3_on()
{
//1.通过GPIO_ODR寄存器，设置PE8引脚输出高电平 0x50006014[10] = 1
GPIOE->ODR |= (0x1 << 8);
}
//LED1熄灭
void led3_off()
{
//2.通过GPIO_ODR寄存器，设置PE8引脚输出高电平 0x50006014[10] = 0
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()
{
led1_rcc_gpio_init(); // LED1灯初始化
led2_rcc_gpio_init();//LED2初始化
led3_rcc_gpio_init();//LED3初始化
while(1)
{
//流水灯
led1_on();
delay_ms(200);
led1_off();
led2_on();
delay_ms(200);
led2_off();
led3_on();
delay_ms(200);
led3_off();
}
return 0;
}
3、拓展作业：
使用枚举封装函数，实现流水灯
尝试封装函数：初始化函数 写函数（开关操作）===>函数参数、函数实现
1、led.h:
//led.h
#ifndef __LED_H__
#define __LED_H__
typedef enum led
{
LED_1=1,
LED_2,
LED_3,
}LED;
typedef enum led_c
{
LED_OFF,
LED_ON,
}LED_CON;
typedef struct{
volatile unsigned int MODER;
volatile unsigned int OTYPER;
volatile unsigned int OSPEEDR;
volatile unsigned int PUPDR;
volatile unsigned int IDR;
volatile unsigned int ODR;
}gpio_t;
#define GPIOE ((gpio_t*)0x50006000)
#define GPIOF ((gpio_t*)0x50007000)
#define RCC_MP_AHB4_ENSETR (*(volatile unsigned int*)0x50000A28)
void led_init();
void led_con();
#endif2、led.c
//led.c
#include "led.h"
void led_init(LED led)
{
switch(led)
{
case LED_1: //直接使用枚举项对枚举变量判断
//1.使能GPIOE组控制器，通过RCC_MP_AHB$ENSETR寄存器设置GPIOE组使能 0x50000A28[4] = 1
RCC_MP_AHB4_ENSETR |= (0x1 << 4);
//LED1的初始化
//1.通过GPIOE_MODER寄存器，设置PE10引脚为输出模式0x50006000[21:20] = 01
GPIOE->MODER |= (0x1 << 20);
GPIOE->MODER &= (~(0x1 << 21));
//2.通过GPIOE_OTYPER寄存器，设置PE10引脚为推晚输出类型0x50006004[10] = 0
GPIOE->OTYPER &= (~(0x1 << 10));
//3.通过GPIOE_OSPEEDR寄存器，设置PE10引脚为低速输出0x50006008[21:20] = 00
GPIOE->OSPEEDR &= (~(0x3 << 20));
//4.通过GPIOE_PUPDR寄存器，设置PE10引脚为输出模式0x50006000C[21:20] = 00
GPIOE->PUPDR &=(~(0x3 << 20));
//printf("初始化了LED_1灯\n");
break;
case LED_2:
//1.使能GPIOF组控制器，通过RCC_MP_AHB$ENSETR寄存器设置GPIOE组使能 0x50000A28[5] = 1
RCC_MP_AHB4_ENSETR |= (0x1 << 5);
//LED2的初始化
//1.通过GPIOF_MODER寄存器，设置PF10引脚为输出模式0x50007000[21:20] = 01
GPIOF->MODER |= (0x1 << 20);
GPIOF->MODER &= (~(0x1 << 21));
//2.通过GPIOF_OTYPER寄存器，设置PF10引脚为推晚输出类型0x50007004[10] = 0
GPIOF->OTYPER &= (~(0x1 << 10));
//3.通过GPIOF_OSPEEDR寄存器，设置PF10引脚为低速输出0x50007008[21:20] = 00
GPIOF->OSPEEDR &= (~(0x3 << 20));
//4.通过GPIOF_PUPDR寄存器，设置PF10引脚为输出模式0x50007000C[21:20] = 00
GPIOF->PUPDR &=(~(0x3 << 20));
//printf("初始化了LED_2灯\n");
break;
case LED_3:
//1.使能GPIOE组控制器，通过RCC_MP_AHB$ENSETR寄存器设置GPIOE组使能 0x50000A28[4] = 1
RCC_MP_AHB4_ENSETR |= (0x1 << 4);
//LED1的初始化
//1.通过GPIOE_MODER寄存器，设置PE10引脚为输出模式0x50006000[17:16] = 01
GPIOE->MODER |= (0x1 << 16);
GPIOE->MODER &= (~(0x1 << 17));
//2.通过GPIOE_OTYPER寄存器，设置PE10引脚为推晚输出类型0x50006004[8] = 0
GPIOE->OTYPER &= (~(0x1 << 8));
//3.通过GPIOE_OSPEEDR寄存器，设置PE10引脚为低速输出0x50006008[17:16] = 00
GPIOE->OSPEEDR &= (~(0x3 << 16));
//4.通过GPIOE_PUPDR寄存器，设置PE10引脚为输出模式0x50006000C[17:16] = 00
GPIOE->PUPDR &=(~(0x3 << 16));
//printf("初始化了LED_3灯\n");
break;
}
}
void led_con(LED led,LED_CON c)
{
switch(led)
{
case LED_1: //直接使用枚举项对枚举变量判断
switch(c)
{
case LED_ON:
//1.通过GPIO_ODR寄存器，设置PE10引脚输出高电平 0x50006014[10] = 1
GPIOE->ODR |= (0x1 << 10);
//printf("打开了LED_1灯\n");
break;
case LED_OFF:
//2.通过GPIO_ODR寄存器，设置PE10引脚输出高电平 0x50006014[10] = 0
GPIOE->ODR &= (~(0x1 << 10));
//printf("关闭了LED_1灯\n");
break;
}
break;
case LED_2:
switch(c)
{
case LED_ON:
//1.通过GPIO_ODR寄存器，设置PF10引脚输出高电平 0x50006014[10] = 1
GPIOF->ODR |= (0x1 << 10);
//printf("打开了LED_2灯\n");
break;
case LED_OFF:
//2.通过GPIO_ODR寄存器，设置PF10引脚输出高电平 0x50006014[10] = 0
GPIOF->ODR &= (~(0x1 << 10));
//printf("关闭了LED_2灯\n");
break;
}
break;
case LED_3:
switch(c)
{
case LED_ON:
//1.通过GPIO_ODR寄存器，设置PE8引脚输出高电平 0x50006014[10] = 1
GPIOE->ODR |= (0x1 << 8);
//printf("打开了LED_3灯\n");
break;
case LED_OFF:
//2.通过GPIO_ODR寄存器，设置PE8引脚输出高电平 0x50006014[10] = 0
GPIOE->ODR &= (~(0x1 << 8));
//printf("关闭了LED_3灯\n");
break;
}
}
}
3、main.c
//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()
{
LED led1 = LED_1;
LED led2 = LED_2;
LED led3 = LED_3;
led_init(led1);//初始化LED1
led_init(led2);//初始化LED2
led_init(led3);//初始化LED3
while(1)
{
//流水灯
led_con(led1,LED_ON);
delay_ms(200);
led_con(led1,LED_OFF);
led_con(led2,LED_ON);
delay_ms(200);
led_con(led2,LED_OFF);
led_con(led3,LED_ON);
delay_ms(200);
led_con(led3,LED_OFF);
}
return 0;
}