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本实验主要是利用串口发送指令实现LED的点亮，基本代码与之前一致，本次只展示改变代码，即main.c

#include "stm32f10x.h"
#include "main.h"
#include "led.h"
#include "bear.h"
#include "key.h"
#include "shake.h"
#include "usart.h"
#include "stdio.h"
void delay(uint16_t time) 
{uint16_t i=0;while(time--){i =12000;while(i--);}}int  main() 
{my_usart_init();LED_Init();
//	My_Usart_Send_Byte( USART1,  'A');
//	My_Usart_Send_Byte( USART1,  'B');
//	My_Usart_Send_Byte( USART1,  'C');
//	My_Usart_Send_Sting( USART1,  "\r\n");
//	My_Usart_Send_Sting(USART1 , "fei \r\n");printf("Hello,shi \r\n");while(1){}		
}void EXTI0_IRQHandler()  //°´¼üÖжϺ¯Êý
{if(EXTI_GetITStatus(EXTI_Line0) != RESET)//ÍⲿÖжϻñÈ¡±ê־λ{GPIO_ResetBits(GPIOA,GPIO_Pin_1);EXTI_ClearITPendingBit(EXTI_Line0);			//Çå³ýÍⲿÖжϱê־룬ҪÓëEXTI_GetITStatus´îÅäʹÓÃ}
}void USART1_IRQHandler()		//串口中断函数
{char receive_data;if(USART_GetITStatus(USART1,USART_IT_RXNE) != RESET){receive_data =  USART_ReceiveData(USART1);			printf("receive data:  %c \r\n", receive_data);  if(receive_data == '1')                        //判断是否符合条件开关灯{GPIO_SetBits(GPIOA,GPIO_Pin_1);printf("LED  OFF \r\n");}if(receive_data == '0'){GPIO_ResetBits(GPIOA,GPIO_Pin_1);printf("LED  ON \r\n");}USART_ClearITPendingBit(USART1,  USART_IT_RXNE);	//清除中断标志位}}

实验结果