ADLINK PCI-7841/cPCI-7841 - Manual (Page 29)

Function Reference 21
Remarks Call this function to retrieve the version of
current using driver. This function is for your
program to get the version of library and
dynamic-linked library.
See Also none
Usage C/C++
#include “pci7841.h”
WORD version = GetDriverVersion();
majorVersion = version >> 8;
minorVersion = version & 0x00FF;
CanOpenDriver()
Purpose Open a specific port, and initialize driver.
Prototype C/C++
int CanOpenDriver(int card, int port))
Parameters card: index of card
port: index of port
Return Value Return a handle for open port
-1 if error occurs
Remarks Call this function to open a port
Under DOS operation system, you will
receive –1 if there is not enough memory. If
writing program for the Windows system. It
will return -1, if you want to open a port had
been opened. And you must use Can-
CloseDriver() to close the port after using.
See Also CanCloseDriver()
Usage C/C++
#include “pci7841.h”
int handle = CanOpenDriver();
CanSendMsg(handle, &msg);
CanCloseDriver(handle);
CanCloseDriver()
Purpose Close an opened port, and release driver.
Prototype C/C++
int CanCloseDriver(int handle)