ADLINK PCI-7841/cPCI-7841 - Manual (Page 46)

38 Function Reference
occurs when the event happened. It will not
be disabled until using CanRemoveCall-
Back() or a hardware reset.
Actually, the call-back function is a part of
ISR. You need to care about the DOS reen-
trance problem, and returns as soon as
possible to preventing the lost of data.
See Also CanRemoveCallBack()
Usage C/C++(DOS)
#include “pci7841.h
void (far ErrorWarning)();
int handle = CanOpenDriver(0, 0);
//
open the port 0 of card 0
…
//
Installs the ErrorWarning handling event and
stores the previous one.
void (far *backup) = CanInstallCallBack(0, 2,
ErrorWarning);
CanRemoveCallBack(0, 2, NULL);//Remove the call-
back function
CanCloseDriver(handle);
CanRemoveCallBack()
Purpose Remove the callback function of event
under DOS environment
Prototype C/C++(DOS)
int CanRemoveCallBack(int handle, int
index, void (far* proc)() );
Parameters handle : handle retrieve from CanOpen-
Driver()
Index : event type
Index Type
2 Error Warning
3 Data Overrun
4 Wake Up
5 Error Passive
6 Arbitration Lost