IBPPC
Board-Level/Device-Level
Purpose
Parallel poll configure.
Format
C
unsigned long ibppc (int ud, int v)
Visual Basic
CALL ibppc (ud%, v%)
or
status% = ilppc (ud%, v%)
Interactive Control (Usage Notes)
ibppc v
Input
| ud | Board or device descriptor |
| v | Parallel poll enable/disable value |
Output
| Function Return | The value of Ibsta |
Description
Device-Level
If ud is a device descriptor, ibppc enables or disables the device from responding to parallel polls. The device is addressed and sent the appropriate parallel poll messageĀParallel Poll Enable (PPE) or Disable (PPD). Valid parallel poll messages are 96 to 126 (hex 60 to hex 7E) or zero to send PPD.
Board-Level
If ud is a board descriptor, ibppc performs a local parallel poll configuration using the parallel poll configuration value v. Valid parallel poll messages are 96 to 126 (hex 60 to hex 7E) or zero to send PPD. If no error occurs during the call, Iberr contains the previous value of the local parallel poll configuration.
For more information about parallel polling, refer to the Parallel Polling section. See IEEE 488 command messages for parallel poll messages.
Possible Errors
| EARG | v does not contain a valid PPE or PPD message. |
| EBUS | Device-level: No devices are connected to the GPIB. |
| ECAP | Board-level: The board is not configured to perform local parallel poll configuration. (See ibconfig, option IbcPP2.) |
| ECIC | Device-level: The access board is not CIC. See Device-Level Calls and Bus Management. |
| EDVR | The NI-488.2 driver is either configured incorrectly or is not properly installed. |
| EHDL | ud is invalid or out of range. |
| ELCK | The requested operation could not be performed because of an existing lock by another process. |
| ENEB | The interface is not installed or is not properly configured. |
| EOIP | Asynchronous I/O is in progress. |