STM32 串口通信编译正常无法通信

OpenMeiY · 发表于 2018-9-12 08:54:47

//////////////////////////////////USART参数配置///////////////////////////////
#include "usart.h"
//#include "public.h"
void usart_Init()    //?????
{
  GPIO_InitTypeDef GPIO_Initstructure;
USART_InitTypeDef USART_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
//RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);

GPIO_Initstructure.GPIO_Pin = GPIO_Pin_9 ;  //Tx
GPIO_Initstructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Initstructure.GPIO_Mode = GPIO_Mode_AF_PP;
  GPIO_Init(GPIOA,&GPIO_Initstructure);

GPIO_Initstructure.GPIO_Pin = GPIO_Pin_10;  //Rx
GPIO_Initstructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Initstructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
  GPIO_Init(GPIOA,&GPIO_Initstructure);

USART_InitStructure.USART_BaudRate =9600;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_No;
USART_InitStructure.USART_HardwareFlowControl =
USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode =USART_Mode_Rx|USART_Mode_Tx;
USART_Init(USART1, &USART_InitStructure);

USART_ClearFlag(USART1,USART_FLAG_TC);
USART_ITConfig(USART1,USART_IT_RXNE,ENABLE);///????
USART_Cmd(USART1,ENABLE); //????
// USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);

   //????
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);       //??
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
//////////////////
void USART1_IRQHandler(void)
{

static u8 k;
   USART_ClearFlag(USART1,USART_IT_TC);
//USART_ClearFlag(USART1,USART_IT_RXNE);
// if(USART_GetITStatus(USART1,USART_IT_RXNE)!=Bit_RESET)
if(USART_GetITStatus(USART1,USART_IT_RXNE)!=Bit_RESET)
{
   k=USART_ReceiveData(USART1);

   k++;

   USART_SendData(USART1, k);
   while(USART_GetFlagStatus(USART1,USART_IT_TC)==Bit_RESET);

}
}
代码如上和教程代码一样，编译没有异常。通信无法通过