National Instruments NI-488.2 NI-488.2 User Manual page 79

0);
if (ud < 0)
printf ("ibdev failed.\n");
return 0;
}
// Issue a request to the device to send the data. If the ERR bit
// is set in ibsta, then print an error message that the call failed
// and exit the program.
ibwrt (ud, "SEND DATA", 9L);
if (ibsta & ERR)
printf ("unable to write to device.\n");
return 0;
}
// set up the asynchronous event notification on RQS
ibnotify (ud, RQS, MyCallback, NULL);
if (ibsta & ERR)
printf ("ibnotify call failed.\n");
return 0;
}
while ((ReadingsTaken < 1000) && !(DeviceError))
// Your application does useful work here. For example, it
// might process the device readings or do any other useful work.
}
// disable notification
ibnotify (ud, 0, NULL, NULL);
// Call the ibonl function to disable the hardware and software.
ibonl (ud, 0);
return 1;
}
int __stdcall MyCallback (int LocalUd, int LocalIbsta, int LocalIberr,
long LocalIbcntl, void *RefData)
{
char SpollByte;
char ReadBuffer[40];
© National Instruments Corporation
// EOS mode disabled
{
{
{
Chapter 8
8-7
NI-488.2 Programming Techniques
{
NI-488.2 User Manual