Rockwell Automation 1747-PCIS API Software - Open Controller - Manual (Page 131)

Publication 1747-UM002A-US-P - June 2000
Library of Routines 6-71
/* Wait 1 second for the EOS */
rc = OC_WaitForEosDmdIn(handle, 1000);
switch(rc) {
case SUCCESS: /* got EOS*/
/* reset the EOS_DMDIN event*/
OC_PollScanner (handle,OCMSG_EOS_DMDIN,&eosMSG);
/* do logic, etc. synchronized with the I/O scan */
break;
case ERR_OCRESPONSE:/* timed out */
printf(“\nTimed out waiting for EOS\n”);
break;
default;
printf(“\nError!\n”);
break;
}
OC_WaitForEosDmdOut Blocks the calling thread until a demand output end-of-scan (EOS)
notification is received from the scanner or
msTimeout milliseconds
have elapsed.
Syntax:
int OC_WaitForEosDmdOut(HANDLE handle,
DWORD msTimeout)
Parameters:
Description:
If a demand output EOS message has been received since the last
OCMSG_EOS_DMDOUT message was retrieved with the
OC_PollScanner function, OC_WaitForEosDmdOut returns SUCCESS
immediately.
You can use this function to synchronize a control application with
the I/O scan. See the OC_EnableEOSNotify and
OC_DemandOutputScan functions.
Parameter: Description:
handle Must be a valid handle returned from OC_OpenScanner
msTimeout Specifies the number of milliseconds to wait
Set to INFINITE to wait forever