探索者F407，串口1通信接收不到数据

qq980271388 · 发表于 2021-6-17 18:15:27

#include "stm32f4xx.h"
#include "led.h"
#include "delay.h"
#include "beep.h"
#include "key.h"

void USART1_Config()
{
GPIO_InitTypeDef GPIO_InitStruct;
USART_InitTypeDef USART_InitStruct;
NVIC_InitTypeDef NVIC_InitStruct;

RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA,ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE);

GPIO_PinAFConfig(GPIOA,GPIO_PinSource9,GPIO_AF_USART1);
GPIO_PinAFConfig(GPIOA,GPIO_PinSource10,GPIO_AF_USART1);

GPIO_InitStruct.GPIO_Pin = GPIO_Pin_9|GPIO_Pin_10;
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStruct.GPIO_OType = GPIO_OType_PP;
GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_InitStruct.GPIO_Speed = GPIO_Fast_Speed;
GPIO_Init(GPIOA,&GPIO_InitStruct);

USART_InitStruct.USART_BaudRate = 115200;
USART_InitStruct.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStruct.USART_Mode = USART_Mode_Rx|USART_Mode_Tx;
USART_InitStruct.USART_Parity = USART_Parity_No;
USART_InitStruct.USART_StopBits = USART_StopBits_1;
USART_InitStruct.USART_WordLength = USART_WordLength_8b;
USART_Init(USART1,&USART_InitStruct);

USART_Cmd(USART1,ENABLE);
USART_ITConfig(USART1,USART_IT_RXNE,ENABLE);

NVIC_InitStruct.NVIC_IRQChannel = USART1_IRQn;
NVIC_InitStruct.NVIC_IRQChannelCmd = ENABLE;
NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority = 2;
NVIC_InitStruct.NVIC_IRQChannelSubPriority = 2;
NVIC_Init(&NVIC_InitStruct);

}
void USART1_IRQHandle()
{
u8 data;
if(USART_GetITStatus(USART1,USART_IT_RXNE)==1)
{
data = USART_ReceiveData(USART1);
USART_SendData(USART1,data);
}
}
int main()
{
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
USART1_Config();
while(1);
}

代码配置没发现错误，但是大多时候接收不到数据，偶尔有一两次可以接收到数据但都是问号，请教大佬一下是我电脑问题还是其他什么问题？