Using Cypress USB Library CyAPI.dll[solved]
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Hello all,
I have been trying to use the library CyAPI.lib provided by Cypress USB Suite 3.4.7
I put the .lib file in the lib/ folder in the project directory
It comes with the CyAPI.h header file which is located in the inc/ folder
My project file looks like this (generated by Qt)
@
#Add CyAPI lib
win32: LIBS += -L$$PWD/lib/ -lCyAPI
INCLUDEPATH += $$PWD/inc
DEPENDPATH += $$PWD/inc
@When I compiled it, this is the error:
@
mainwindow.obj : error LNK2019: unresolved external symbol "public: __thiscall CCyUSBDevice::~CCyUSBDevice(void)" (??1CCyUSBDevice@@QAE@XZ) referenced in function "public: void __thiscall MainWindow::USB_Init(void)" (?USB_Init@MainWindow@@QAEXXZ)
mainwindow.obj : error LNK2019: unresolved external symbol "public: unsigned char __thiscall CCyUSBDevice::DeviceCount(void)" (?DeviceCount@CCyUSBDevice@@QAEEXZ) referenced in function "public: void __thiscall MainWindow::USB_Init(void)" (?USB_Init@MainWindow@@QAEXXZ)
mainwindow.obj : error LNK2019: unresolved external symbol "public: __thiscall CCyUSBDevice::CCyUSBDevice(void *,struct _GUID,int)" (??0CCyUSBDevice@@QAE@PAXU_GUID@@H@Z) referenced in function "public: void __thiscall MainWindow::USB_Init(void)" (?USB_Init@MainWindow@@QAEXXZ)
debug\qtproj.exe : fatal error LNK1120: 3 unresolved externals
NMAKE : fatal error U1077: '"C:\Program Files\Microsoft Visual Studio 10.0\VC\BIN\link.EXE"' : return code '0x460'
Stop.
NMAKE : fatal error U1077: '"C:\Program Files\Microsoft Visual Studio 10.0\VC\BIN\nmake.exe"' : return code '0x2'
Stop.
@It looks like the lib failed to link. Can someone help me understand why it doesn't link? Is it the library's problem or something failed in the linking process
I am using Qt5.0.0 by the way, compiled with default parameters
Thanks!
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Hi,
Does you Qt and CyAPI dll use the same architecture ?
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You're welcome !
Since you got it working, don't forget to update the thread title prepending [solved] so other forum users may know a solution has been found :)
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[quote author="aobo" date="1379296197"]Hi SGalst
Thanks for the help. I somehow copied the x64 lib into my project directory. with the x86 version, it works now!
Thanks![/quote]
Hi aobo, which x64 lib do you copy into project? Is user32.lib?
Should I create lib/ folder and inc/folder and put in CyAPI.lib and CyAPI.h?
Thanks! -
Hi.
Good to see someone else is using this library to do things!
If you have installed the Cypress USB Suite 3.4.7. There are files in C:/Cypress/Cypress Suite USB 3.4.7/CyAPI
You want the CyAPI.lib in the lib/x86/ folder (I used the one from x64, which created the problem). Put this in your Qt project directory lib/ then grab all the header files in C:\Cypress\Cypress Suite USB 3.4.7\CyAPI\inc and put them in your project directory inc/ folder
You can then use the code here to link the library to your project:
@
#Add CyAPI lib
win32: LIBS += -L$$PWD/lib/ -lCyAPI
INCLUDEPATH += $$PWD/inc
DEPENDPATH += $$PWD/inc
@Make sure when you use the library, include <Windows.h> because CyAPI uses a lot of the windows definitions.
