当前位置: 首页 > news >正文

STM32串口——5个串口的使用方法

参考文档

STM32串口——5个串口的使用方法_51CTO博客_stm32串口通信的接收与发送

串口是我们常用的一个数据传输接口,STM32F103系列单片机共有5个串口,其中1-3是通用同步/异步串行接口USART(Universal Synchronous/Asynchronous Receiver/Transmitter),4,、5是通用异步串行接口UART(Universal Asynchronous Receiver/Transmitter)。

配置串口包括三部分内容:

1.  I/O口配置:TXD配置为复用推挽输出(GPIO_Mode_AF_PP),RXD配置为浮空输入(GPIO_Mode_IN_FLOATING);

2.  串口配置:波特率等;

3.  中断向量配置:一般用中断方式接收数据。

注意事项:

1.  USART1是挂在APB2,使能时钟命令为:

RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE );

其他几个则挂在APB1上,如2口:

RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE );

2.  配置4口和5口的时候,中断名为UART4、UART5,中断入口分别为

UART4_IRQn、UART5_IRQn

对应的中断服务函数为

void UART4_IRQHandler(void)

void UART5_IRQHandler(void)。

#include "stm32f10x.h"
#include "misc.h"
#include "stm32f10x_gpio.h"
#include "stm32f10x_usart.h" void USART1_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;        RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE );
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE );GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; //USART1 TX;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //复用推挽输出;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure); //端口A;GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; //USART1 RX;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; //浮空输入;
GPIO_Init(GPIOA, &GPIO_InitStructure); //端口A;USART_InitStructure.USART_BaudRate = 9600; //波特率;
USART_InitStructure.USART_WordLength = USART_WordLength_8b; //数据位8位;
USART_InitStructure.USART_StopBits = USART_StopBits_1; //停止位1位;
USART_InitStructure.USART_Parity = USART_Parity_No ; //无校验位;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
//无硬件流控;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
//收发模式;
USART_Init(USART1, &USART_InitStructure);//配置串口参数;NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2); //设置中断组,4位抢占优先级,4位响应优先级;NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn; //中断号;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; //抢占优先级;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; //响应优先级;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
USART_Cmd(USART1, ENABLE); //使能串口;
}void USART1_Send_Byte(u8 Data) //发送一个字节;
{
USART_SendData(USART1,Data);
while( USART_GetFlagStatus(USART1, USART_FLAG_TC) == RESET );
}void USART1_Send_String(u8 *Data) //发送字符串;
{
while(*Data)
USART1_Send_Byte(*Data++);
}void USART1_IRQHandler(void) //中断处理函数;
{
u8 res;    
if(USART_GetITStatus(USART1, USART_IT_RXNE) == SET) //判断是否发生中断;
{
USART_ClearFlag(USART1, USART_IT_RXNE); //清除标志位;
res=USART_ReceiveData(USART1); //接收数据;
USART1_Send_Byte(res); //用户自定义;
}  
} void USART2_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;        RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE );
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE );GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2; //USART2 TX;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //复用推挽输出;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure); //端口A;GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3; //USART2 RX;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; //浮空输入;
GPIO_Init(GPIOA, &GPIO_InitStructure); //端口A;USART_InitStructure.USART_BaudRate = 9600; //波特率;
USART_InitStructure.USART_WordLength = USART_WordLength_8b; //数据位8位;
USART_InitStructure.USART_StopBits = USART_StopBits_1; //停止位1位;
USART_InitStructure.USART_Parity = USART_Parity_No ; //无校验位;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
//无硬件流控;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
//收发模式;
USART_Init(USART2, &USART_InitStructure);//配置串口参数;NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2); //设置中断组,4位抢占优先级,4位响应优先级;NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn; //中断号;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; //抢占优先级;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; //响应优先级;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);
USART_Cmd(USART2, ENABLE); //使能串口;
}void USART2_Send_Byte(u8 Data) //发送一个字节;
{
USART_SendData(USART2,Data);
while( USART_GetFlagStatus(USART2, USART_FLAG_TC) == RESET );
}void USART2_Send_String(u8 *Data) //发送字符串;
{
while(*Data)
USART2_Send_Byte(*Data++);
}void USART2_IRQHandler(void) //中断处理函数;
{
u8 res;    
if(USART_GetITStatus(USART2, USART_IT_RXNE) == SET) //判断是否发生中断;
{
USART_ClearFlag(USART2, USART_IT_RXNE); //清除标志位;
res=USART_ReceiveData(USART2); //接收数据;
USART2_Send_Byte(res); //用户自定义;
}  
} void USART3_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;        RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE );
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, ENABLE );GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; //USART3 TX;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //复用推挽输出;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure); //端口B;GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11; //USART3 RX;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; //浮空输入;
GPIO_Init(GPIOB, &GPIO_InitStructure); //端口B;USART_InitStructure.USART_BaudRate = 9600; //波特率;
USART_InitStructure.USART_WordLength = USART_WordLength_8b; //数据位8位;
USART_InitStructure.USART_StopBits = USART_StopBits_1; //停止位1位;
USART_InitStructure.USART_Parity = USART_Parity_No ; //无校验位;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
//无硬件流控;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
//收发模式;
USART_Init(USART3, &USART_InitStructure);//配置串口参数;NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2); //设置中断组,4位抢占优先级,4位响应优先级;NVIC_InitStructure.NVIC_IRQChannel = USART3_IRQn; //中断号;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; //抢占优先级;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; //响应优先级;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);USART_ITConfig(USART3, USART_IT_RXNE, ENABLE);
USART_Cmd(USART3, ENABLE); //使能串口;
}void USART3_Send_Byte(u8 Data) //发送一个字节;
{
USART_SendData(USART3,Data);
while( USART_GetFlagStatus(USART3, USART_FLAG_TC) == RESET );
}void USART3_Send_String(u8 *Data) //发送字符串;
{
while(*Data)
USART3_Send_Byte(*Data++);
}void USART3_IRQHandler(void) //中断处理函数;
{
u8 res;    
if(USART_GetITStatus(USART3, USART_IT_RXNE) == SET) //判断是否发生中断;
{
USART_ClearFlag(USART3, USART_IT_RXNE); //清除标志位;
res=USART_ReceiveData(USART3); //接收数据;
USART3_Send_Byte(res); //用户自定义;
}  
} void UART4_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;        RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE );
RCC_APB1PeriphClockCmd(RCC_APB1Periph_UART4, ENABLE );GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; //UART4 TX;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //复用推挽输出;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOC, &GPIO_InitStructure); //端口C;GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11; //UART4 RX;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; //浮空输入;
GPIO_Init(GPIOC, &GPIO_InitStructure); //端口C;USART_InitStructure.USART_BaudRate = 9600; //波特率;
USART_InitStructure.USART_WordLength = USART_WordLength_8b; //数据位8位;
USART_InitStructure.USART_StopBits = USART_StopBits_1; //停止位1位;
USART_InitStructure.USART_Parity = USART_Parity_No ; //无校验位;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
//无硬件流控;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
//收发模式;
USART_Init(UART4, &USART_InitStructure);//配置串口参数;NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2); //设置中断组,4位抢占优先级,4位响应优先级;NVIC_InitStructure.NVIC_IRQChannel = UART4_IRQn; //中断号;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; //抢占优先级;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; //响应优先级;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);USART_ITConfig(UART4, USART_IT_RXNE, ENABLE);
USART_Cmd(UART4, ENABLE); //使能串口;
}void UART4_Send_Byte(u8 Data) //发送一个字节;
{
USART_SendData(UART4,Data);
while( USART_GetFlagStatus(UART4, USART_FLAG_TC) == RESET );
}void UART4_Send_String(u8 *Data) //发送字符串;
{
while(*Data)
UART4_Send_Byte(*Data++);
}void UART4_IRQHandler(void) //中断处理函数;
{
u8 res;    
if(USART_GetITStatus(UART4, USART_IT_RXNE) == SET) //判断是否发生中断;
{
USART_ClearFlag(UART4, USART_IT_RXNE); //清除标志位;
res=USART_ReceiveData(UART4); //接收数据;
UART4_Send_Byte(res); //用户自定义;
}  
} void UART5_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;        RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC|RCC_APB2Periph_GPIOD, ENABLE );
RCC_APB1PeriphClockCmd(RCC_APB1Periph_UART5, ENABLE );GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12; //UART5 TX;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //复用推挽输出;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOC, &GPIO_InitStructure); //端口C;GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2; //UART5 RX;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; //浮空输入;
GPIO_Init(GPIOD, &GPIO_InitStructure); //端口D;USART_InitStructure.USART_BaudRate = 9600; //波特率;
USART_InitStructure.USART_WordLength = USART_WordLength_8b; //数据位8位;
USART_InitStructure.USART_StopBits = USART_StopBits_1; //停止位1位;
USART_InitStructure.USART_Parity = USART_Parity_No ; //无校验位;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
//无硬件流控;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
//收发模式;
USART_Init(UART5, &USART_InitStructure);//配置串口参数;NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2); //设置中断组,4位抢占优先级,4位响应优先级;NVIC_InitStructure.NVIC_IRQChannel = UART5_IRQn; //中断号;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; //抢占优先级;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; //响应优先级;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);USART_ITConfig(UART5, USART_IT_RXNE, ENABLE);
USART_Cmd(UART5, ENABLE); //使能串口;
}void UART5_Send_Byte(u8 Data) //发送一个字节;
{
USART_SendData(UART5,Data);
while( USART_GetFlagStatus(UART5, USART_FLAG_TC) == RESET );
}void UART5_Send_String(u8 *Data) //发送字符串;
{
while(*Data)
UART5_Send_Byte(*Data++);
}void UART5_IRQHandler(void) //中断处理函数;
{
u8 res;    
if(USART_GetITStatus(UART5, USART_IT_RXNE) == SET) //判断是否发生中断;
{
USART_ClearFlag(UART5, USART_IT_RXNE); //清除标志位;
res=USART_ReceiveData(UART5); //接收数据;
UART5_Send_Byte(res); //用户自定义;
}  
}


STM32串口——5个串口的使用方法
https://blog.51cto.com/u_14970037/5666911

http://www.lryc.cn/news/489142.html

相关文章:

  • NVR接入录像回放平台EasyCVR视频融合平台加油站监控应用场景与实际功能
  • Ubuntu24.04安装gpfs客户端
  • Android Framework层介绍
  • 如何利用 Puppeteer 的 Evaluate 函数操作网页数据
  • SpringMVC接收请求参数
  • 安宝特方案 | AR助力紧急救援,科技守卫生命每一刻!
  • 蓝桥杯每日真题 - 第18天
  • HTTP 协议应用场景
  • 【Linux庖丁解牛】—Linux基本指令(下)!
  • python: generator model using sql server 2019
  • Kafka怎么发送JAVA对象并在消费者端解析出JAVA对象--示例
  • 深度学习(1)
  • golang 嵌入式armv7l压缩编译打包
  • Makefile 之 join
  • 集合卡尔曼滤波(Ensemble Kalman Filter),用于二维滤波(模拟平面上的目标跟踪),MATLAB代码
  • 北京申请中级职称流程(2024年)
  • ubuntu.24安装cuda
  • unity li2cpp逆向原理是什么?
  • Python网络爬虫实践案例:爬取猫眼电影Top100
  • 卷积神经网络(CNN)中的权重(weights)和偏置项(bias)
  • 华为FusionCube 500-8.2.0SPC100 实施部署文档
  • Android 网络请求(二)OKHttp网络通信
  • npm上传自己封装的插件(vue+vite)
  • 如何在Word文件中设置水印以及如何禁止修改水印
  • .NET桌面应用架构Demo与实战|WPF+MVVM+EFCore+IOC+DI+Code First+AutoMapper
  • el-table根据指定字段合并行和列+根据屏幕高度实时设置el-table的高度
  • 图像处理 之 凸包和最小外围轮廓生成
  • 萤石设备视频接入平台EasyCVR私有化视频平台视频监控系统的需求及不同场景摄像机的选择
  • 网络安全之接入控制
  • Sqlite: Java使用、sqlite-devel