学QT时，写的一个简单得不能再简单的串口上位机，用来控制单片机上的2个LED。假设一个是只有开和关的状态。一个可以调节亮度。上位机的界面如下图：
其中，波特率，数据位，停止位下拉值在设计师里面添加。剩下的功能，基本由代码实现。通信使用的协议也是随便写的。很简单和随意。图片是老弟手绘的。
下面贴代码 (*^__^*)
#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QtSerialPort>
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
Pic = tr("://Resource/关灯.jpg"); //放置一张图片
ui->lightLabel->setPixmap(Pic);
ui->RTextEdit->setReadOnly(false);
ui->STextEdit->setReadOnly(false);
ui->onButton->setEnabled(true); //默认关灯
ui->offButton->setEnabled(false);
ui->lightDial->setEnabled(false);
serial = new QSerialPort(this);
OpenFlag = false; //串口未打开
connect(ui->lightDial, SIGNAL(valueChanged(int)), this, SLOT(on_light_chance()));
UsartUi();
}
MainWindow::~MainWindow()
{
delete ui;
}
void MainWindow::UsartUi() //完善串口配置UI
{
ui->parityBox->addItem(QStringLiteral("None"),QSerialPort::NoParity);
ui->parityBox->addItem(QStringLiteral("偶校验"),QSerialPort::EvenParity);
ui->parityBox->addItem(QStringLiteral("奇校验"),QSerialPort::OddParity);
ui->parityBox->addItem(QStringLiteral("Mark 1"),QSerialPort::MarkParity);
ui->parityBox->addItem(QStringLiteral("Space 0"),QSerialPort::SpaceParity);
ui->baundRateBox->setItemData(0,QSerialPort::Baud4800);
ui->baundRateBox->setItemData(1,QSerialPort::Baud9600);
ui->baundRateBox->setItemData(2,QSerialPort::Baud19200);
ui->baundRateBox->setItemData(3,QSerialPort::Baud38400);
ui->baundRateBox->setItemData(4,QSerialPort::Baud57600);
ui->baundRateBox->setItemData(5,QSerialPort::Baud115200);
ui->dataBitBox->setItemData(0,QSerialPort::Data5);
ui->dataBitBox->setItemData(1,QSerialPort::Data6);
ui->dataBitBox->setItemData(2,QSerialPort::Data7);
ui->dataBitBox->setItemData(3,QSerialPort::Data8);
ui->stopBitBox->setItemData(0,QSerialPort::OneStop);
ui->stopBitBox->setItemData(1,QSerialPort::OneAndHalfStop);
ui->stopBitBox->setItemData(2,QSerialPort::TwoStop);
PortInfo();
}
void MainWindow::PortInfo()
{
ui->uNameBox->clear();
foreach (const QSerialPortInfo &info, QSerialPortInfo::availablePorts()) {
QStringList list;
list << info.portName()
<< info.description()
<< info.manufacturer()
<< info.systemLocation()
<< (info.vendorIdentifier() ? QString::number(info.vendorIdentifier(), 16) : QString())
<< (info.productIdentifier() ? QString::number(info.productIdentifier(), 16) : QString());
ui->uNameBox->addItem(list.first(), list);
}
}
//槽函数
void MainWindow::on_startButton_clicked() //打开串口
{
if(!OpenFlag)//执行打开串口
{
currentConfig.name = ui->uNameBox->currentText();
currentConfig.baudRate = static_cast<QSerialPort::BaudRate>
(ui->baundRateBox->itemData(ui->baundRateBox->currentIndex()).toInt());
currentConfig.dataBits = static_cast<QSerialPort::DataBits>
(ui->dataBitBox->itemData(ui->dataBitBox->currentIndex()).toInt());
currentConfig.stopBits = static_cast<QSerialPort::StopBits>
(ui->stopBitBox->itemData(ui->stopBitBox->currentIndex()).toInt());
currentConfig.parity = static_cast<QSerialPort::Parity>
(ui->parityBox->itemData(ui->parityBox->currentIndex()).toInt());
serial->setPortName(currentConfig.name);
if(serial->open(QIODevice::ReadWrite))
{
if( serial->setBaudRate(currentConfig.baudRate)
&& serial->setDataBits(currentConfig.dataBits)
&& serial->setStopBits(currentConfig.stopBits)
&& serial->setParity(currentConfig.parity) )
{
OpenFlag = true;
ui->startButton->setText(tr("关闭串口"));
}
else
{
serial->close();
OpenFlag = false;
ui->startButton->setText(tr("打开串口"));
}
}
else
{
OpenFlag = false;
ui->startButton->setText(tr("打开串口"));
}
}
else
{
OpenFlag = false;
ui->startButton->setText(tr("打开串口"));
serial->close();
}
/* ui->STextEdit->setText(tr("校验位：%1
波特率：%2
数据位：%3
停止位：%4")
.arg(ui->parityBox->itemData(ui->parityBox->currentIndex()).toString())
.arg(ui->baundRateBox->itemData(ui->baundRateBox->currentIndex()).toString())
.arg(ui->dataBitBox->itemData(ui->dataBitBox->currentIndex()).toString())
.arg(ui->stopBitBox->itemData(ui->stopBitBox->currentIndex()).toString()));
*/
}
void MainWindow::on_offButton_clicked() //关灯
{
QByteArray data;
QString Pdata;
data.resize(3);
data[0] = 0xF0;
data[1] = 0X0F;
data[2] = 0x80;
ui->offButton->setEnabled(false);
ui->onButton->setEnabled(true);
ui->lightDial->setValue(1);
ui->lightDial->setEnabled(false);
Pdata = data.toHex().toUpper();
int Size = Pdata.size();
for(int i = Size; i > 0; i--)
{
Pdata.insert(i * 2, " ");
}
ui->STextEdit->insertPlainText(Pdata);
//发送数据
serial->write(data);
}
void MainWindow::on_onButton_clicked() //开灯 0XF0 0X0F 0X81
{
QByteArray data;
QString Pdata;
data.resize(3);
data[0] = 0xF0;
data[1] = 0X0F;
data[2] = 0X81;
ui->onButton->setEnabled(false);
ui->offButton->setEnabled(true);
ui->lightDial->setEnabled(true);
Pdata = data.toHex().toUpper();
int Size = Pdata.size() / 2;
for(int i = Size; i > 0; i--)
{
Pdata.insert(i * 2, " ");
}
ui->STextEdit->insertPlainText(Pdata);
//发送数据
serial->write(data);
}
void MainWindow::on_light_chance()
{
QByteArray data;
QString Pdata;
data.resize(5);
data[0] = 0xF0;
data[1] = 0x0F;
data[2] = 0xC0;
data[3] = 0x01;
data[4] = ui->lightDial->value();
Pdata = data.toHex().toUpper();
int Size = Pdata.size() / 2;
for(int i = Size; i > 0; i--)
{
Pdata.insert(i * 2, " ");
}
ui->STextEdit->insertPlainText(Pdata);
serial->write(data);
}
void MainWindow::on_freshButton_clicked() //刷新状态
{
QByteArray Rdata = serial->readAll();
QString Pdata = Rdata.toHex().toUpper(); //转换成HEX格式且大写
int Size = Pdata.size()/2;
for(int i = Size; i > 0; i--) //插入空格 使格式如 xx xx xx
{
Pdata.insert(i * 2, " ");
}
ui->RTextEdit->insertPlainText(Pdata);
int i = 0;
if(Rdata.at(i) && 0xF0 == 0xF0)
{
i++;
if(Rdata.at(i) && 0x0F == 0x0F)
{
while(Rdata.at(i) != ' ') //解析指令
{
if(Rdata.at(i) && 0x80 == 0x80)currentStatus.lightOnOff = false;
if(Rdata.at(i) && 0x81 == 0x81)currentStatus.lightOnOff = true;
if(Rdata.at(i) && 0xc0 == 0xc0)
{
i = i + 2;
currentStatus.lightValue = Rdata.at(i);
}
i++;
}
}
}
if(currentStatus.lightOnOff)Pic = tr("://Resource/开灯.jpg");
else Pic = tr("://Resource/关灯.jpg");
ui->lightLabel->setPixmap(Pic);
ui->lightLcdNumber->display(currentStatus.lightValue);
}