Measurement Computing GPIB-488 - Manual (Page 39)

Chapter 3 GPIB 488.1 Library Reference
Programming Reference Manual 3-26 GPIB-488
• IFC = Interface Clear
• REN = Remote Enable
• SRQ = Service Request
• EOI = End or Identify
Usage Notes
In order for this call to function properly, all devices attached to the GPIB bus must adhere to
IEEE-488 specification.
Example
This example tests the state of the ATN line.
C #define ATNLINE = 0x40
int lines;
iblines (board, &lines);
if (lines & ATNLINE == 0)
printf "ATN line can not be monitored by this
GPIB board";
else ( (lines >> 8) & ATNLINE ) == 0)
printf "ATN line is not asserted";