Comments by Ramiien (Top 36 by date)

this is what i tried e.g
TStmpMilliCurrent= QString::number(timestamp.millis, 10); //getting time
int myprevTime= TStmpMilliCurrent; // trying to put it in other variable

but its not possible i am trying to put string to int. How i can do this?

Actually i am getting time in milli seconds from CAN and trying to get the time difference between two frames

int TStmpMilliCurrentInt = atoi(TStmpMilliCurrent);

getting msg cannot convert Qstring to const Char

TStmpMilliCurrent= QString::number(timestamp.millis, 10);
TStmpMicroCurrent= QString::number(timestamp.micros, 10);

Now i want to add them but getting error because both are qstring type. How i can add or perform any math operation on these ??

I posted new question with CODE

here i am closing a file if size is >2000 than close the file1.trc and then change the file name and open the new file.

second close is for the case when size is less than 2000. if the file size would be less than 2000 it will never come inside the if condition. and I am already saving the file size into the variable "Filesize".

this is how i am trying to do but it gives me error device not open when file size of the first file greater than 1000...


LoggerFileName = QString("C:/MyDevelopment/PcanLinker/PcanPortLinker/PcanDataLogger%1.trc").arg(j);

QFile mFile(LoggerFileName);
if(mFile.open(QIODevice::WriteOnly|QIODevice::Text));
{
for(i=0;i<2000;i++)
<!--2000--> {
if(nflag!=0)
{
nflag=0;
QFile mFile(LoggerFileName);
mFile.open(QIODevice::WriteOnly|QIODevice::Text);

}
PCANReadS = g_CAN_Read(PCAN_USBBUS1, &msg, ×tamp);
if(PCANReadS == PCAN_ERROR_OK)
{
Dataid =QString::number(msg.ID, 16);
int temp=*(int*)msg.DATA;
MsgType = msg.MSGTYPE;
Datain= QString::number(temp, 16);
TStmp= QString::number(timestamp.micros, 10);

QTextStream mylog(&mFile);
fileSize = mFile.size();
FileBasePath= mFile.fileName();
mylog <<"Msg_ " << i << ") CAN_ID(hex):" << Dataid << " DATA : " << Datain << " Time :" << TStmp << '\n';

if(fileSize > 1000) // If file size is greater than 1000 than create new file
{
j++; //incremental variable for fileName
nflag=1;
mFile.close(); //close the file1.trc
mFile.flush(); //flush the data of file1.trc
LoggerFileName = QString("C:/MyDevelopment/PcanLinker/PcanPortLinker/PcanDataLogger%1.trc").arg(j); //updatefile name file2.trc


}


}
}
}
mFile.close(); //close the file if its size is less than 1000 bytes
mFile.flush();

What exactly i am looking for is as following
Check the size of the file if size > 50 MB
than
generate new logger_i+1.trc file
and write on the file
Else
write on logger_i.trc file

which method would be better and easy?

M idea was that structname.element is the way to print value. e.g cout << TPCANMsg.ID to print the ID of the CAN. but it is not working. i dont know why?

Finally i get some success to access DLL file. using Loadlibrary() and GetProcAddress()
https://www.c-plusplus.net/forum/128715-full
I have no words for Thanks.
Thanks I really appreciate your help and assistance. Danke

Yes but in sample app it is without extention
g_i_DLL = LoadLibrary("PCANBasic");
and this also means dll file is in the same folder where this cpp file is??

i used loadlibrary as following
HMODULE hMod = LoadLibrary(PCANBasic.dll);

it returns me error PCANBasic was undefined. it seems its defination is missing. I dont know how to define this?

without DLL call application is running without warning. while with when call DLL functions it gives following warnings in compile output
Warning: resolving _CAN_Initialize@20 by linking to _CAN_Initialize
Use --enable-stdcall-fixup to disable these warnings
Use --disable-stdcall-fixup to disable these fixups
Warning: resolving _CAN_GetErrorText@12 by linking to _CAN_GetErrorText

so i need to include only PCANBasic.lib file in my .pro file and place the PCANBasic.dll in the same folder.
e.g
#LIBS += "C:/MyDevelopment/PcanLinker/includes/PCANBasic.lib"
and PCANBasic.dll into the includes folder.
this what you means?

Nothing works
Now again previous error
The program has unexpectedly finished.
C:\MyDevelopment\build-PcanPortLinker-Desktop_Qt_5_5_0_MinGW_32bit-Debug\debug\PcanPortLinker.exe crashed

I have one confussion that my MinGW debuger is 32 Bit(as you can see above..) and my system is 64 bit. does it matters? And which DLL file i need to use 32 bit or 64bit?? in my API i have 2 dll folders Win32 and x64.

you means lib file of the API?? how lib file access DLL file?

line 19: result = CAN_Initialize(PCAN_USBBUS1, PCAN_BAUD_250K); // to initialize pcan
line 20: breaking point

Now getting error
File not recognized:file format not recognized
C:\MyDevelopment\build-PcanPortLinker-Desktop_Qt_5_5_0_MinGW_32bit-Debug\debug\Pcanbasic.dll
it seams accessing DLL file successfully but problem is something else??

I am getting this error screen
The program has unexpectedly finished.
C:\MyDevelopment\build-PcanPortLinker-Desktop_Qt_5_5_0_MinGW_32bit-Debug\debug\PcanPortLinker.exe crashed

I am trying in debug mood and setting breaking point at following line
result = CAN_Initialize(PCAN_USBBUS1, PCAN_BAUD_250K); // to initialize pcan

i am using the correct file because i downloaded the windows package of API from PEAK Systems.
I am configuring the DLL file by static address like below
LIBS += "C:/myDevelopment/PcanLinker/build-PcanPortLinker-Desktop_Qt_5_5_0_MinGW_32bit-Debug/debug/PCANBasic.dll"

is it correct? maybe there could be a problem in path of DLL?

I have only one DLL file
I am trying to call PCAN initialize function
CAN_Initialize(PCAN_USBBUS1, PCAN_BAUD_5K);
and setting breaking point at this line it returns me error
"The program has unexpectedly finished" from pcanportlinker.exe
does it means problem is in dll connection or calling function?

Thanks for guidance
I am facing problem in connecting DLL file in my class(myclass.cpp). it is giving me linked crash error "program has unexpectedly finished"
in .pro file i am giving the path of dll file like given below
--------------------------------------------------------------
CONFIG += "C:/mypro/debug/PCANBasic.dll"

and in myclass.cpp file
-------------------------------
#define PCANBasic.h //header file of API

CAN_Initialize(PCAN_USBBUS1, PCAN_BAUD_5K) //function of PCAN_USB API

please guide me in this problem.

I am using PCAN_USB so it means all parallel parameters would be 0 ??

here is function of apifile.h file
///

/// Gets the current status of a PCAN Channel
///

/// <param name="Channel">"The handle of a PCAN Channel"</param>
/// <returns>"A TPCANStatus error code"
TPCANStatus __stdcall CAN_GetStatus(
TPCANHandle Channel)

what i am doing in mymainfile.cpp
----------------------------------
CAN_GetStatus(channel)

correct?

i did in .h file

If i am using one API
which contain 2 files

Apifile.h
apifile.dll

now i want to call the functions of apifile.h in my file mymainfile.cpp
what i am doing is
#include "Apifile.h" //into mymainfile.cpp

Apifile::apifilefunction()
{
return from API file will come here

}

it will work or not??

I have one question for my clarification only
I need to list all functions of pcanlinkerclass.cpp into header file of the class??
class pCANLinkerClass
{
//...
void func1();
void func2();
void func3();
void func4();
//...
};
or is there some better way to manage these??

Thanks bro

if example code means code in API documentation than yes i didn't get it fully when I tried to do it in C++. would be nice if you guide me in this direction.

Thanks for your answer. I already did this partially. right now my position is i am getting data From DLL file. e.g

qDebug() << "Hardware Name is :" << PCAN_HARDWARE_NAME;
and it returns me "14" i dont know what this means and how to get Name of the hardware and further information of the hardware from these IDs??

Thanks for your answer. I already did this. right now my position is i am getting data From DLL file. e.g

qDebug() << "Hardware Name is :" << PCAN_HARDWARE_NAME;
and it returns me "14" i dont know what this means and how to get Name of the hardware and further information of the hardware from these IDs??
similarly
qDebug() << "Hardware channel is :" << PCAN_CHANNEL_CONDITION
I get the output "13" but as per documentation expected values would be
PCAN_CHANNEL_AVAILABLE
PCAN_CHANNEL_UNAVAILABLE
PCAN_CHANNEL_OCCUPIED
PCAN_CHANNEL_PCANVIEW
I didnot get how to get these values from documentation.