Measurement Computing GPIB-488 - Manual (Page 31)

Chapter 3 GPIB 488.1 Library Reference
Programming Reference Manual 3-18 GPIB-488
IBEOS
Changes or disables End-Of-String termination mode.
Syntax
C ibeos (int boarddev, int eos)
Parameters
boarddev is an integer containing the board/device handle.
eos is an integer that defines which termination mode and what EOS character are to be used,
as shown in Table 3-4, Selecting EOS.
Returns
ibsta will contain a 16-bit status word as described in Appendix B, IBSTA .
iberr will contain an error code, if an error occurred. If an error does not occur the previous
value of eos is stored in iberr .
Usage Notes
This call only defines an EOS byte for a board or device. It does not cause the handler to
automatically send that byte when performing writes. Your application must include the EOS
byte in the data string it defines.
If this call defines an EOS for a device, then the defined EOS is used for all reads and writes
involving that device. Likewise, if the call defines an EOS for a board, then all reads and
writes involving that board will use that EOS.
Table 3-4. Selecting EOS
Method Description
eos
High Byte Low Byte
A Terminate read when EOS is detected. Can be used
alone or in combination with Method C. (Constant =
REOS) 00000100 EOS
character
B Set EOI with EOS on write function. Can be used alone
or in combination with Method C. (Constant = XEOS) 00001000 EOS
character
C Compare all 8 bits of EOS byte rather than low 7 bits for
all read and write functions. (Constant = BIN) 00010000 EOS
character