F1精英版 USART串口实验输入无反应

z382341334 · 发表于 2021-2-2 22:59:03

用的是原子哥的标准工程模板，串口设置没问题，问题是没有发回数据。球球大佬们看看问题在哪

main代码如下 (基本都是照着打的)

#include "stm32f10x.h"
#include "sys.h"

void All_Init()
{
GPIO_InitTypeDef  GPIO_InitStructure;
USART_InitTypeDef  USART_InitStruct;
NVIC_InitTypeDef  NVIC_InitStruct;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1|RCC_APB2Periph_GPIOA, ENABLE); //使能USART1，GPIOA时钟

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; //PA.9 复用推挽输出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //复用推挽输出
GPIO_Init(GPIOA, &GPIO_InitStructure);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;//浮空输入
GPIO_Init(GPIOA, &GPIO_InitStructure);


   NVIC_InitStruct.NVIC_IRQChannel=USART1_IRQn;
   NVIC_InitStruct.NVIC_IRQChannelCmd=ENABLE;
   NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority=1;
   NVIC_InitStruct.NVIC_IRQChannelSubPriority=1;
   NVIC_Init(&NVIC_InitStruct);

   USART_InitStruct.USART_BaudRate=115200;
   USART_InitStruct.USART_WordLength=USART_WordLength_8b;
   USART_InitStruct.USART_StopBits=USART_StopBits_1;
   USART_InitStruct.USART_Parity=USART_Parity_No;
   USART_InitStruct.USART_Mode=USART_Mode_Rx|USART_Mode_Tx;
   USART_InitStruct.USART_HardwareFlowControl=USART_HardwareFlowControl_None;

   USART_Init(USART1,&USART_InitStruct);
   USART_ITConfig(USART1,USART_IT_RXNE,ENABLE);
   USART_Cmd(USART1,ENABLE);

}

void USART_IRQHandler(void)
{
u8 t;

if(USART_GetITStatus(USART1,USART_IT_RXNE))
{
t=USART_ReceiveData(USART1);
USART_SendData(USART1,t);
}
}

int main(void)
{
     NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
     All_Init();
while(1);

}