IBRDF
Board-Level/Device-Level
Purpose
Read data from a device into a file.
Format
C
unsigned long ibrdf (int ud, const char *flname)
Visual Basic
CALL ibrdf (ud%, flname$)
or
status% = ilrdf (ud%, flname$)
Interactive Control (Usage Notes)
ibrdf flname
Input
| ud | Board or device descriptor |
| flname | Name of file into which data is read |
Output
| Function Return | The value of Ibsta |
Description
Device-Level
If ud is a device descriptor, ibrdf addresses the GPIB, reads data from a GPIB device, and places the data into the file specified by flname. The operation terminates normally when END is received. The operation terminates with an error if the transfer could not complete within the timeout period. The actual number of bytes transferred is returned in the global function Ibcnt.
Board-Level
If ud is a board descriptor, ibrdf reads data from a GPIB device and places the data into the file specified by flname. A board-level ibrdf assumes that the GPIB is already properly addressed. The operation terminates normally when END is received. The operation terminates with an error if the transfer could not complete within the timeout period or, if the board is not CIC, the CIC sends a Device Clear on the GPIB. The actual number of bytes transferred is returned in the global function Ibcnt.
Possible Errors
| EABO | END was not received within the timeout period, or ud is a board descriptor and Device Clear was received after the read operation began. |
| EADR | Board-level: The GPIB is not correctly addressed; use ibcmd to address the GPIB. |
| Device-level: A conflict exists between the device GPIB address and the GPIB address of the device access board. Use ibconfig, options IbcPAD and IbcSAD. | |
| EARG | flname is invalid. |
| EBUS | Device-level: No devices are connected to the GPIB. |
| 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. |
| EFSO | ibrdf could not access flname. |
| 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. |