STM32串口——5个串口的使用方法

embedded/2024/11/26 15:24:45/

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.ppmy.cn/embedded/140650.html

相关文章

人工智能学习框架实例解析

人工智能学习框架在机器学习、深度学习和其他AI任务中发挥着关键作用。 一、TensorFlow TensorFlow是由Google开发的开源机器学习框架,广泛应用于学术界和工业界。它支持多种编程语言,包括Python、C和Java,并具有强大的社区支持和丰富的文档…

OEM sql monitoring 类似SQL

不够OEM 全面 select a.inst_id,a.time_since_last_wait_micro,a.last_call_et,a.sql_id,a.sql_hash_value, a.username,a.pdml_enabled,a.pdml_status ,a.prev_sql_id from gv$session a where a.statusACTIVE and a.sql_id is not null and a.username is not null select …

DICOM图像处理:深入解析DICOM彩色图像中的Planar配置及其对像素数据解析处理的实现

引言 在DICOM(Digital Imaging and Communications in Medicine)标准中,彩色图像的存储与显示涉及多个关键属性,其中**Planar Configuration(平面配置)**属性(标签 (0028,0006))尤为重要。当遇到彩色DICOM图像在浏览时被错误地分割为9张小图,而实际应显示为一…

学习threejs,使用设置bumpMap凹凸贴图创建褶皱,实现贴图厚度效果

👨‍⚕️ 主页: gis分享者 👨‍⚕️ 感谢各位大佬 点赞👍 收藏⭐ 留言📝 加关注✅! 👨‍⚕️ 收录于专栏:threejs gis工程师 文章目录 一、🍀前言1.1 ☘️THREE.MeshPhongMaterial高…

IDEA怎么定位java类所用maven依赖版本及引用位置

在实际开发中,我们可能会遇到需要搞清楚代码所用依赖版本号及引用位置的场景,便于排查问题,怎么通过IDEA实现呢? 可以在IDEA中打开项目,右键点击maven的pom.xml文件,或者在maven窗口下选中项目,…

“理-工-医-信”跨学科协同合作,第五届“医疗大数据学术交流及Datathon活动”圆满落幕!

“AI 不能代替医生,但是掌握了 AI 技术的医生一定能代替那些没掌握 AI 的医生。” 人工智能在卫生健康行业的应用将为医疗产业带来深刻变革,推动医疗行业向更智能、更高效、更个性化的方向发展。基于此,2024 年 11 月 14 日至 17 日&#xff…

结合Gitee、PicGo和Typora构建一个免费的个人笔记工具

文章目录 📝小引言📝步骤与内容📝简单使用Typora📝Gitee和GitHub📝使用GiteePicGo打造自己的图床Gitee建仓库Node环境配置PicGo软件安装及配置Typora测试 📝美化Typora 📝小引言 不知道大家在写…

【CSP CCF记录】201809-2第14次认证 买菜

题目 样例输入 4 1 3 5 6 9 13 14 15 2 4 5 7 10 11 13 14 样例输出 3 思路 易错点:仅考虑所给样例,会误以为H和W两人的装车时间是一一对应的,那么提交结果的运行错误就会让你瞬间清醒。 本题关键是认识到H和W的装车时间不一定一一对应&…