串口通讯实验，请问为什么电脑可以发出而stm32接收不到呢

bobo99 · 发表于 2020-4-13 21:27:12

#include"stm32f10x.h"
#include"usart.h"

void usart_Init()
{

GPIO_InitTypeDef GPIO_SIGN;
USART_InitTypeDef USART_SIG;
NVIC_InitTypeDef AAA;

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

GPIO_SIGN.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_SIGN.GPIO_Pin = GPIO_Pin_9;
GPIO_SIGN.GPIO_Speed = GPIO_Speed_10MHz;
GPIO_Init(GPIOA,&GPIO_SIGN);

GPIO_SIGN.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_SIGN.GPIO_Pin = GPIO_Pin_10;
GPIO_SIGN.GPIO_Speed = GPIO_Speed_10MHz;
GPIO_Init(GPIOA,&GPIO_SIGN);

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

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

USART_ITConfig(USART1,USART_IT_RXNE,DISABLE);

USART_Cmd(USART1,ENABLE);
}

void USART1_IRQHandler()
{
u8 res;

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

int main(void)
{
   NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
   usart_Init();
while(1);
}