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kitty5 wrote: fprintf( fpwrite, buffer );
Should be:
fprintf( fpwrite, "%lu", buffer[0]);
fprintf( fpwrite, "%lu", buffer[1]);
...
"Money talks. When my money starts to talk, I get a bill to shut it up." - Frank
"Judge not by the eye but by the heart." - Native American Proverb
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Hi all,
Iam trying to read and write to USB device.
I get an error message
error LNK2001: unresolved external symbol "public: enum FT_STATUS __thiscall CUSBtestDlg::GetStatus(unsigned long *,unsigned long *,unsigned long *)" (?GetStatus@CUSBtestDlg@@QAE?AW4FT_STATUS@@PAK00@Z)
Release/USBtest.exe : fatal error LNK1120: 1 unresolved externals
I tried debugging but in vain.
Can anyone help/ any ideas?
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You need to see why the implementation of CUSBtestDlg::GetStatus(unsigned long *,unsigned long *,unsigned long *) is not in any of your cpp or header files that are included in your project. Have you added all the cpp files in your source folder to the project??
John
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Hi John n Naveen,
Thanks for the response.
In the header file I do,
protected:<br />
typedef FT_STATUS (WINAPI *PtrToGetStatus)(FT_HANDLE, LPDWORD, LPDWORD, LPDWORD);<br />
PtrToGetStatus m_pGetStatus;<br />
FT_STATUS GetStatus(LPDWORD, LPDWORD, LPDWORD);<br />
in the cpp file, I do
int CUSBtestDlg::Buf_Read(void)<br />
{<br />
DWORD dRxBytes;<br />
DWORD dTxBytes;<br />
<br />
DWORD dEventStatus;<br />
<br />
GetStatus(&dRxBytes,&dTxBytes,&dEventStatus);<br />
}
I get the error message that i mentioned before for this.
But I do the FT_STATUS FT_Read() also in the similar way and that works.
Any sugestion.?
-- modified at 23:41 Sunday 23rd July, 2006
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but where is the definition of the funtion GetStatus(..)?
nave
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FT_GetStatus is the FTD2XX_API library funciton.
This is given in the header file ftd2xx.h which is included in the USBtestdlg.h file.
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hoo...So have include the lib file for that api in the project?
nave
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have included the ftd2xx.h file as external dependency in the project. so the drivers installed should take care of linking the functions and reading and writing from the device(USB).
I can use their FT_Read and FT_Write functions without any errors.
Infact I have done the same way for GetStatus too.
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u have to include the lib file for the same.
take menu project->Settings
in the link tab, there will be an edit box called object/library modules. Give the name of the lib file there and rebuild the project.
nave
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FT_Read and FT_Write and FT_GetStatus are all in the same.
I dont know what I should include now.
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thathvamsi wrote: are all in the same.
same what?dll?
Actually whats "FTD2XX_API library funciton".Can u give me any link so that i can tell u, to what lib u must link.
nave
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I meant the dll.
Its the FTD2xx.dll that links the application software with the USB device.
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Hey,
thanks, I did.
works now.
Thanks for ur help.
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U might have declared a Funtion like "CUSBtestDlg::GetStatus(.)" in the header file ( say USBtestDlg.h ) but the body or funtion definiton is not written. More over u have called that funtion from some else.
Solutions.
Either remove the funtion declaration from the header file or Add the function definition in the CPP file
nave
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Hey,
I have posted my code / response in my previous message.
Any help/ideas?
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i am trying to make an number 1.111111
store into a float as 1.11
mean something like
int float lala = 1.111111;<==how can isave as 2 decimal place
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To clip off the rest of the ones, you can
double dfNum=1.111111;
dfNum*=100;
dfNum=(int)dfNum;
dfNum/=100;
TRACE("%f\n",dfNum);
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Is there anybody who can help me??????From past two days i am trying my best..but still...
Whenever I open a new project and try to compile it i got the error....
Any of you had this problem ? If so how do you solved it ?
c:\program files\microsoft visual studio\vc98\include\winnt.h(1092) : error
C2146: syntax error : missing ';' before identifier 'KSPIN_LOCK'
c:\program files\microsoft visual studio\vc98\include\winnt.h(1092) : fatal
error C1004: unexpected end of file found
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priyanka s wrote: c:\program files\microsoft visual studio\vc98\include\winnt.h(1092) : fatal
error C1004: unexpected end of file found
The above error is coming because u must compile the stdafx.cpp before compiling any other files first time.It good u build (not compile )the entire project first.
nave
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I ALREADY BUILD THE WHOLE PROJECT BEFORE COMPILE....
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Whats your program, are you getting this error in all your programs
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YES I AM GETTING THIS ERROR IN ALL MY PROGRAM.....JUST OPENING THE NEW PROJECT AND ERROR IS THERE...THE PROJECT WHICH R WORKING BEFORE NOW THEY ALSO HAVE ERROR...
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Just Uninstall the Visual Studio and reinstall it again.We have given you all the known solutions.
Appu..
"If you judge people, you have no time to love them."
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priyanka s wrote: c:\program files\microsoft visual studio\vc98\include\winnt.h(1092) : error
C2146: syntax error : missing ';' before identifier 'KSPIN_LOCK'
First, what does your stdafx.h file look like?
"Money talks. When my money starts to talk, I get a bill to shut it up." - Frank
"Judge not by the eye but by the heart." - Native American Proverb
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