初识stm32-----串口1的中断收发

stm32-----中断收发

#include "stm32f10x.h"

#include "usart.h"

void My_USART1_Init(void)

{

GPIO_InitTypeDef GPIO_InitStrue;

USART_InitTypeDef USART_InitStrue;

NVIC_InitTypeDef NVIC_InitStrue;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);//①

RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE);

GPIO_InitStrue.GPIO_Mode=GPIO_Mode_AF_PP;

GPIO_InitStrue.GPIO_Pin=GPIO_Pin_9;

GPIO_InitStrue.GPIO_Speed=GPIO_Speed_10MHz;

  GPIO_Init(GPIOA,&GPIO_InitStrue);//②

GPIO_InitStrue.GPIO_Mode=GPIO_Mode_IN_FLOATING;

GPIO_InitStrue.GPIO_Pin=GPIO_Pin_10;

GPIO_InitStrue.GPIO_Speed=GPIO_Speed_10MHz;

  GPIO_Init(GPIOA,&GPIO_InitStrue);//②

USART_InitStrue.USART_BaudRate=115200;

USART_InitStrue.USART_HardwareFlowControl=USART_HardwareFlowControl_None;

USART_InitStrue.USART_Mode=USART_Mode_Tx|USART_Mode_Rx;

USART_InitStrue.USART_Parity=USART_Parity_No;

USART_InitStrue.USART_StopBits=USART_StopBits_1;

USART_InitStrue.USART_WordLength=USART_WordLength_8b;

USART_Init(USART1,&USART_InitStrue);//③

USART_Cmd(USART1,ENABLE);//使能串口1

USART_ITConfig(USART1,USART_IT_RXNE,ENABLE);//开启接收中断

NVIC_InitStrue.NVIC_IRQChannel=USART1_IRQn;

NVIC_InitStrue.NVIC_IRQChannelCmd=ENABLE;

NVIC_InitStrue.NVIC_IRQChannelPreemptionPriority=1;

NVIC_InitStrue.NVIC_IRQChannelSubPriority=1;

NVIC_Init(&NVIC_InitStrue);

}

void USART1_IRQHandler(void)

{

u8 res;

//uint8_t data;

if(USART_GetITStatus(USART1,USART_IT_RXNE))

 {

     res= USART_ReceiveData(USART1); 

     USART_SendData(USART1,res);

     UART_PutStr(USART1, "hello world!");             //  字符串  

  }

}

 int main(void)

 {

  NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);

My_USART1_Init();

while(1);

 }