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题目：

题目一：通过操作Cortex-A7核，串口输入相应的命令，控制LED灯进行工作--->上传CSDN

1.例如在串口输入led1on,开饭led1灯点亮

2.例如在串口输入led1off,开饭led1灯熄灭

3.例如在串口输入led2on,开饭led2灯点亮

4.例如在串口输入led2off,开饭led2灯熄灭

5.例如在串口输入led3on,开饭led3灯点亮

6.例如在串口输入led3off,开饭led3灯熄灭

题目二：检测中断到来时，让LED灯状态取反，并且在串口工具上打印一句话--->上传CSDN

例如：

当按键1按下之后，让LED1状态取反，并打印“LED1 down”

当按键2按下之后，让LED2状态取反，并打印“LED2 down”

当按键3按下之后，让LED3状态取反，并打印“LED3 down”

火焰传感器/人体红外/光电开关实验要求如上

代码：

代码一：

mix.h

#ifndef __MIX_H__            
#define __MIX_H__            #include "stm32mp1xx_rcc.h"  
#include "stm32mp1xx_gpio.h" 
#include "stm32mp1xx_uart.h" void hal_mix_rcc();          
void hal_mix_gpio();         
void hal_mix_uart();         
void func();                 #endif                       

min.c

#include "mix.h"extern void delay_ms(int ms);
void hal_mix_rcc()
{RCC->MP_AHB4ENSETR|=(0x1<<1);RCC->MP_AHB4ENSETR|=(0x1<<4);RCC->MP_AHB4ENSETR|=(0x1<<5);RCC->MP_AHB4ENSETR|=(0x1<<6);RCC->MP_APB1LPENSETR|=(0x1<<16);
}
void hal_mix_gpio()
{GPIOB->MODER&=(~(0x3<<4));GPIOB->MODER|=(0x2<<4);GPIOG->MODER&=(~(0x3<<22));GPIOG->MODER|=(0x2<<22);GPIOB->AFRL&=(~(0xf<<8));GPIOB->AFRL|=(0x8<<8);GPIOG->AFRH&=(~(0xf<<12));GPIOG->AFRH|=(0x6<<12);GPIOE->MODER&=(~(0x3<<20));GPIOE->MODER|=(0x1<<20);GPIOF->MODER&=(~(0x3<<20));GPIOF->MODER|=(0x1<<20);GPIOE->MODER&=(~(0x3<<16));GPIOE->MODER|=(0x1<<16);GPIOE->OTYPER&=(~(0x1<<10));GPIOF->OTYPER&=(~(0x1<<10));GPIOE->OTYPER&=(~(0x1<<8));GPIOE->OSPEEDR&=(~(0x3<<20));GPIOF->OSPEEDR&=(~(0x3<<20));GPIOE->OSPEEDR&=(~(0x3<<16));GPIOE->PUPDR&=(~(0x3<<20));GPIOF->PUPDR&=(~(0x3<<20));GPIOE->PUPDR&=(~(0x3<<16));
}
void hal_led_on(int num)
{switch(num){case 1:GPIOE->ODR|=(0x1<<10);break;case 2:GPIOF->ODR|=(0x1<<10);break;case 3:GPIOE->ODR|=(0x1<<8);break;}
}
void hal_led_off(int num)
{switch(num)                   {                             case 1:                   GPIOE->ODR&=(~(0x1<<10));break;                case 2:                   GPIOF->ODR&=(~(0x1<<10));break;                case 3:                   GPIOE->ODR&=(~(0x1<<8)); break;                }                            
}
void hal_mix_uart()
{delay_ms(20);USART4->CR1&=(~(0x1<<0));USART4->CR1&=(~(0x1<<28));USART4->CR1&=(~(0x1<<12));USART4->CR1&=(~(0x1<<15));USART4->CR1&=(~(0x1<<10));USART4->CR2&=(~(0x3<<12));USART4->PRESC&=(~(0xf<<0));USART4->BRR=0x22B;USART4->CR1|=(0x1<<3);USART4->CR1|=(0x1<<2);USART4->CR1|=(0x1<<0);
}
void put_char(const char ch)
{while(!(USART4->ISR&(0x1<<7)));USART4->TDR=ch;while(!(USART4->ISR&(0x1<<6)));
}
void put_string(const char *string)
{int i=0;char ch;while(1){ch=string[i];put_char(ch);if(ch=='\0'){break;}i++;}
}
char get_char()
{char ch;while(!(USART4->ISR&(0x1<<5)));ch=USART4->RDR;    return ch;
}
char buffer[20];
char *get_string()
{for(int i=0;i<19;i++){buffer[i]=get_char();put_char(buffer[i]);if(buffer[i]=='\r'){put_char('\n');buffer[i]='\0';break;}}return buffer;    
}
int my_strcmp(char *a,char *b)
{int i=0;int j=0;while(*(a+i)!='\0'&&*(b+j)!='\0'&&*(a+i)==*(b+j)){i++;j++;}return *(a+i)-*(b+j);
}
void func()
{char temp[20]={0};get_string();if(my_strcmp(buffer,"led1on")==0){hal_led_on(1);}else if(my_strcmp(buffer,"led1off")==0){hal_led_off(1);}else if(my_strcmp(buffer,"led2on")==0){hal_led_on(2);}else if(my_strcmp(buffer,"led2off")==0){hal_led_off(2);}else if(my_strcmp(buffer,"led3on")==0){hal_led_on(3);}else if(my_strcmp(buffer,"led3off")==0){hal_led_off(3);}
}

main.c

#include "mix.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()
{hal_mix_rcc();                     hal_mix_gpio();                    hal_mix_uart();                    printf("abc");while(1){func();                            }return 0;
}

代码二：

运行结果：

结果一：

结果二：