大佬们救救吧，我跟着B站原子哥视频写的代码，但是串口助手没反应。大家帮忙看看吧

DHN2021 · 发表于 2021-9-21 17:21:00

这是main.c的代码
#include "stm32f10x.h"
#include "delay.h"
#include "uart.h"

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

这是uart.c的代码
#include "uart.h"

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

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

GPIO_InitStruct.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA,&GPIO_InitStruct);

GPIO_InitStruct.GPIO_Pin = GPIO_Pin_9;
GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(GPIOA,&GPIO_InitStruct); //初始化GPIO

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); //初始化USART

USART_Cmd(USART1, ENABLE); //使能串口

USART_ITConfig(USART1, USART_IT_RXNE, ENABLE); //使能USART1的接收中断

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); //设置优先级
}

void USART_IRQHandler(void)
{
uint8_t res;
if(USART_GetITStatus(USART1, USART_IT_RXNE))
{
res = USART_ReceiveData(USART1);
USART_SendData(USART1, res);
}
}