STM32F103ZET6串口配置问题

Roken · 发表于 2019-3-8 18:39:30

我的板子是核心系统板，照着原子视频教程上代码配置UART串口后，没有任何反应，但是使用标准例程-V3.5库函数版本的串口实验代码后运行正常，刚学习STM系列的小白一个，请大佬们多多指教。下面上代码
#include "delay.h"
#include "sys.h"
#include "stm32f10x.h"

void Usart_init(){
  //GPIO端口设置
  GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;

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

//USART1_TX GPIOA.9
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; //PA.9
  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);//初始化GPIOA.9

  //USART1_RX    GPIOA.10初始化
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;//PA10
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;//浮空输入
  GPIO_Init(GPIOA, &GPIO_InitStructure);//初始化GPIOA.10

  //Usart1 NVIC 配置
  NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=3 ;//抢占优先级3
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3; //子优先级3
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ通道使能
NVIC_Init(&NVIC_InitStructure); //根据指定的参数初始化VIC寄存器

//USART 初始化设置

USART_InitStructure.USART_BaudRate = 9600;//串口波特率
USART_InitStructure.USART_WordLength = USART_WordLength_8b;//字长为8位数据格式
USART_InitStructure.USART_StopBits = USART_StopBits_1;//一个停止位
USART_InitStructure.USART_Parity = USART_Parity_No;//无奇偶校验位
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//无硬件数据流控制
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; //收发模式

  USART_Init(USART1, &USART_InitStructure); //初始化串口1
  USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);//开启串口接受中断
  USART_Cmd(USART1, ENABLE);                   //使能串口1
}

void USART1_IRQHandler(void){
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);
}