QT串口上位机的代码
C++
#include "mainwindow.h"
#include "ui_mainwindow.h"
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
ui->pushButton->setEnabled(false);
serial=new QSerialPort(this);
updateSerialPortMenu();
connect(ui->pushButton,&QPushButton::clicked,this,[=]()
{
if(serial->isOpen())
{
ui->pushButton->setText("打开串口");
ui->label->setText("串口"+currentPortName+"已关闭");
serial->close();
}else
{
serialControl();
}
});
QAction *refreshAction=new QAction("刷新串口",this);
menuBar()->addAction(refreshAction);
connect(refreshAction,&QAction::triggered,this,&MainWindow::refreshSerialPortList);
connect(serial,&QSerialPort::readyRead,this,&MainWindow::readSerialData);
connect(serial,SIGNAL(error(QSerialPort::SerialPortError)),this,SLOT(handleSerialError(QSerialPort::SerialPortError)));
}
//如果中途出现串口断开的处理槽函数
void MainWindow::handleSerialError(QSerialPort::SerialPortError error)
{
if(error==QSerialPort::PermissionError)
{
ui->pushButton->setText("打开串口");
ui->label->setText("串口"+currentPortName+"异常关闭");
serial->close();
}
}
void MainWindow::readSerialData()//处理单片机传过来的数据的槽函数
{
QByteArray data =serial->readAll();
ui->textEdit->append(QString::fromUtf8(data));
}
//刷新串口端口的槽函数
void MainWindow::refreshSerialPortList()
{
//清除旧菜单项
for(QAction*action: protactionGroup->actions())
{
ui->menuSerialPorts->removeAction(action);
protactionGroup->removeAction(action);
delete action;
}
//再重新添加扫描到的串口
const auto ports=QSerialPortInfo::availablePorts();
for(const QSerialPortInfo &info:ports )
{
QAction *protAction=new QAction(info.portName(),this);
protAction->setCheckable(true);
protactionGroup->addAction(protAction);
ui->menuSerialPorts->addAction(protAction);
}
ui->menuSerialPorts->setEnabled(true);
ui->label->setText("串口菜单已刷新");
ui->pushButton->setText("打开串口");
}
void MainWindow::serialControl()
{
if(serial->open(QIODevice::ReadWrite))
{
serial->clear(QSerialPort::AllDirections);//清除缓冲区,要不然一开始接收的字符可能是乱码
ui->pushButton->setEnabled(true);
ui->pushButton->setText("关闭串口");
ui->textEdit->clear();
ui->label->setText("串口"+currentPortName+"已打开");
serial->setBaudRate(QSerialPort::Baud115200);
serial->setDataBits(QSerialPort::Data8);
serial->setParity(QSerialPort::NoParity);
serial->setStopBits(QSerialPort::OneStop);
serial->setFlowControl(QSerialPort::NoFlowControl);
}
else
{
ui->label->setText("串口"+currentPortName+"打开失败");
//弹窗提示
QMessageBox::information(this,"串口打开失败","无法打开串口"+currentPortName+".\n请检查是否被其他程序占用或不存在.");
}
}
//当用户选择了对应的串口端口后进行的处理
void MainWindow::onSerialPorSelected(QAction *action)
{
QString selectedPort = action->text();
currentPortName=selectedPort;
serial->setPortName(selectedPort);
ui->menuSerialPorts->setEnabled(false);
if(serial->isOpen())
{
serial->close();
}
serialControl();
}
void MainWindow::updateSerialPortMenu()
{
ui->menuSerialPorts->clear();//清除旧的菜单栏
protactionGroup=new QActionGroup(this);//用于管理互斥选择
protactionGroup->setExclusive(true);
foreach(const QSerialPortInfo &info,QSerialPortInfo::availablePorts())
{
QAction *protAction=new QAction(info.portName(),this);
protAction->setCheckable(true);
protactionGroup->addAction(protAction);
ui->menuSerialPorts->addAction(protAction);
}
//连接槽函数:当用户点击某个串口菜单项时
// connect(protactionGroup,&QActionGroup::triggered,this,&MainWindow::onSerialPorSelected);//这句话用Lambda表示如下:
connect(protactionGroup,&QActionGroup::triggered,this,[this](QAction *action)
{
QString selectSerial=action->text();
qDebug()<<"select Serial Port:"<<selectSerial;
this->onSerialPorSelected(action);
});
}
MainWindow::~MainWindow()
{
delete ui;
}
stm32的串口代码(使用定时器定时往串口发送数据)
C
#include "timer.h"
uint8_t timer_flag = 0;
void Timer_NVIC(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
void Timer_Config(void)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
/* Time Base configuration */
TIM_TimeBaseStructure.TIM_Prescaler = 7200-1;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseStructure.TIM_Period = 10000-1;
TIM_TimeBaseStructure.TIM_ClockDivision = 0;
TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);
Timer_NVIC();
TIM_ITConfig(TIM2,TIM_IT_Update,ENABLE);
/* TIM3 counter enable */
TIM_Cmd(TIM2, ENABLE);
}
void TIM2_IRQHandler()
{
if(TIM_GetITStatus(TIM2,TIM_IT_Update)==SET)
{
timer_flag=1;
TIM_ClearITPendingBit(TIM2,TIM_IT_Update);
}
}
#include "usart.h"
void Usart_Config(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
/* Enable GPIO clock */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1|RCC_APB2Periph_GPIOA | RCC_APB2Periph_AFIO, ENABLE);
/* Configure USARTy Rx as input floating */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOA, &GPIO_InitStructure);
/* Configure USARTy Tx as alternate function push-pull */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(GPIOA, &GPIO_InitStructure);
USART_InitStructure.USART_BaudRate = 115200;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_No;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Rx |USART_Mode_Tx;
/* Configure USARTy */
USART_Init(USART1, &USART_InitStructure);
/* Enable USARTz */
USART_Cmd(USART1, ENABLE);
}
void Usart_send(uint8_t ch)
{
/* Place your implementation of fputc here */
/* e.g. write a character to the USART */
USART_SendData(USART1, (uint8_t) ch);
/* Loop until the end of transmission */
while (USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET)
{}
}
void Usart_sendBuff(uint8_t *buf,uint32_t size)
{
for(uint32_t i=0;i<size;i++)
{
Usart_send(buf[i]);
}
}
//¶¨Ê±·¢ËÍ
void Send_Handle()
{
uint8_t xiao[9]="xiaoxiao";
if(timer_flag==1)
{
timer_flag=0;
Usart_sendBuff(xiao,sizeof(xiao));
}
}
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