基于mainwidow用qt写一个简单的自发自收的can通信,包含头文件和源文件和ui
时间: 2023-12-06 21:45:37 浏览: 98
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首先需要安装CAN总线的驱动程序和库文件,这里以PEAK-System的PCAN驱动为例。可以在官网下载并安装PCAN驱动程序和PCAN Basic API库文件。然后,我们可以在Qt中使用QCanBus类来实现CAN通信。
以下是基于mainwidow用Qt编写的简单自发自收的CAN通信的头文件和源文件及ui:
头文件(cancommunication.h):
```cpp
#ifndef CANCOMMUNICATION_H
#define CANCOMMUNICATION_H
#include <QMainWindow>
#include <QCanBus>
#include <QCanBusFrame>
QT_BEGIN_NAMESPACE
namespace Ui { class CANCommunication; }
QT_END_NAMESPACE
class CANCommunication : public QMainWindow
{
Q_OBJECT
public:
CANCommunication(QWidget *parent = nullptr);
~CANCommunication();
private slots:
void on_sendButton_clicked();
void readCANFrame();
private:
Ui::CANCommunication *ui;
QCanBusDevice *canDevice;
};
#endif // CANCOMMUNICATION_H
```
源文件(cancommunication.cpp):
```cpp
#include "cancommunication.h"
#include "ui_cancommunication.h"
#include <QDebug>
CANCommunication::CANCommunication(QWidget *parent)
: QMainWindow(parent)
, ui(new Ui::CANCommunication)
{
ui->setupUi(this);
// 初始化CAN总线设备
QList<QCanBusDeviceInfo> devices = QCanBus::instance()->availableDevices("peakcan");
if (!devices.isEmpty()) {
QCanBusDeviceInfo deviceInfo = devices.first();
canDevice = QCanBus::instance()->createDevice("peakcan", deviceInfo.name());
if (canDevice == nullptr) {
qWarning() << "Error creating device";
return;
}
} else {
qWarning() << "No device found";
return;
}
// 连接槽函数
connect(canDevice, &QCanBusDevice::framesReceived, this, &CANCommunication::readCANFrame);
// 开启CAN总线设备
if (!canDevice->connectDevice()) {
qWarning() << "Connection error";
return;
}
}
CANCommunication::~CANCommunication()
{
delete ui;
// 断开CAN总线设备
if (canDevice != nullptr) {
canDevice->disconnectDevice();
delete canDevice;
}
}
void CANCommunication::on_sendButton_clicked()
{
// 发送CAN帧
QCanBusFrame frame;
frame.setFrameId(ui->idLineEdit->text().toInt(nullptr, 16));
frame.setPayload(QByteArray::fromHex(ui->dataLineEdit->text().toUtf8()));
canDevice->writeFrame(frame);
}
void CANCommunication::readCANFrame()
{
// 接收CAN帧
while (canDevice->framesAvailable()) {
QCanBusFrame frame = canDevice->readFrame();
ui->logTextEdit->append(QString("ID: 0x%1, Data: %2")
.arg(frame.frameId(), 3, 16, QLatin1Char('0'))
.arg(QString(frame.payload().toHex(' '))));
}
}
```
ui文件(cancommunication.ui):
使用Qt Designer进行设计即可。
需要添加以下控件:
- QLineEdit:idLineEdit、dataLineEdit
- QTextEdit:logTextEdit
- QPushButton:sendButton
将控件与对应的槽函数和信号连接即可。
注意:在.pro文件中需要添加以下代码:
```pro
QT += serialbus
CONFIG += c++11
```
其中,serialbus用于使用QCanBus类,c++11用于使用nullptr。
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