Do not succeed in reading and writting frames with peak system
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Hi all,
I've bought a PCAN-USB FD system to link my PC to an embedded system. The communication works well between my embedded system and PCAN-VIEW.
Then, I imported PCANBasic.lib from the PCAN_Basic_API into my Qt Project (Qt 5.12.5 MinGW 64-bit). I copied the PCANBasic.dll in my executable folder. I checked that the plugin is available and that the QcanBusDevice is well connected to the can bus. However, I do not succeed in receiving or sending frames in my Qt Project: no communication with PCAN-VIEW or my embedded system
Below is my Qt project. Any help would be appreciated.
#include <windows.h> #include <math.h> #include <QtSerialBus> #include <QCanBus> #include <QCanBusDevice> #include <QCanBusFrame> #include <QDebug> #include <QThread> can::can() { if (QCanBus::instance()->plugins().contains(QStringLiteral("peakcan"))) { // plugin available qDebug() << "plugin available"; } QString errorString; const QList<QCanBusDeviceInfo> devices = QCanBus::instance()->availableDevices( QStringLiteral("peakcan"), &errorString); if (!errorString.isEmpty()) qDebug() << errorString; QCanBusDevice *device = QCanBus::instance()->createDevice( QStringLiteral("peakcan"), QStringLiteral("usb0"), &errorString); if (!device) { // Error handling goes here qDebug() << errorString; } else { device->setConfigurationParameter(5,0); device->setConfigurationParameter(4,250000); //device->setConfigurationParameter(5,1); //device->setConfigurationParameter(6,250000); device->connectDevice(); qDebug()<<device->state(); // ConnectedState } QCanBusFrame frame; frame.setFrameId(0x400); frame.setFrameType(QCanBusFrame::DataFrame); QByteArray payload("AAAA"); frame.setPayload(payload); while(1) { device->writeFrame(frame); //Sleep(500); } /*QCanBusFrame frame2; frame2.setFrameId(0x500); frame2.setFrameType(QCanBusFrame::DataFrame); while (1) { if (device->framesAvailable()!=0) { frame2 = device->readFrame(); qDebug() << frame2.payload(); } }*/ }TEMPLATE = app QT += network #QT += webkit QT += sql QT += widgets QT += serialbus QT += core TARGET = proto DEPENDPATH += . INCLUDEPATH += . HEADERS += \ can.h \ SOURCES += \ can.cpp \ main.cpp LIBS += "C:/Users/etudes/Desktop/PCAN_Basic_API/x64/VC_LIB/PCANBasic.lib" INCLUDEPATH += "C:/Users/etudes/Desktop/PCAN_Basic_API/x64" -
I've done these tests with the following source code:
while(1) { qDebug()<<device->writeFrame(frame); qDebug()<<device->errorString(); Sleep(500); }writFrame() returns "true".
error() returns "QCanBusDevice::NoError".Hi @Jules31,
please try the CAN example first. You can also start it from Qt Creator.
Note that for 64 bit Qt you will need a 64 bit
pcanbasic.dll.As said before, don't use
sleepin event driven programs. It will block the event loop and that blocks the correct program execution.Regards
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Hi,
The example does not compile.
I now use a signal but it still does not word:
connect(device, &QCanBusDevice::framesReceived, this, &can::onFramesReceived); void can::onFramesReceived() { qDebug() << "[Frame received] !"; } -
Hi,
The example does not compile.
I now use a signal but it still does not word:
connect(device, &QCanBusDevice::framesReceived, this, &can::onFramesReceived); void can::onFramesReceived() { qDebug() << "[Frame received] !"; }Hi @Jules31,
The example does not compile.
Please post the exact compiler error. The example should compile and run just fine.
Also, in your first post you wrote:
Then, I imported PCANBasic.lib from the PCAN_Basic_API into my Qt Project
That is not needed. The
pcanbasic.dllis loaded dynamically at runtime. -
Hi @Jules31,
The example does not compile.
Please post the exact compiler error. The example should compile and run just fine.
Also, in your first post you wrote:
Then, I imported PCANBasic.lib from the PCAN_Basic_API into my Qt Project
That is not needed. The
pcanbasic.dllis loaded dynamically at runtime. -
I disabled the "ResetCanController" option and I now get the error "Cannot load library pcanbasic".
@Jules31 said in Do not succeed in reading and writting frames with peak system:
I disabled the "ResetCanController" option
What is that? Are you using a newer example than the one provided with Qt 5.12?
and I now get the error "Cannot load library pcanbasic".
As said, check that the DLL has the correct bitness.
Regards
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@Jules31 said in Do not succeed in reading and writting frames with peak system:
I disabled the "ResetCanController" option
What is that? Are you using a newer example than the one provided with Qt 5.12?
and I now get the error "Cannot load library pcanbasic".
As said, check that the DLL has the correct bitness.
Regards
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Hi @Jules31,
However, it still does not work in my Qt Project.
Then please incorporate the fixes we mentioned above and show your modified code.
Does the PCAN-Basic_API also works with the PCAN-Ethernet Gateway DR from peak system ?
Currently not. Do you have such a device and could provide the needed adoptions to the peakcan plugin?
Regards
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Hi,
I will incorporate your fixes today.
I've just checked on peak-system website and it seems that the access to the CAN channels of a PCAN-Gateway is enabled via the new PCAN-LAN hardware type from PCAN-Basic library:
https://www.peak-system.com/PCAN-Basic.239.0.html?&L=1
Does anyone has tested to use P-CAN-Gateway with PCAN-Basic library yet ?
Thank you
