What does IVI_ATTR_SUPPORTS_WR_BUF_OPER_MODE attribute do?

[pblase]

I'm working on an IVI driver, and found "IVI_ATTR_SUPPORTS_WR_BUF_OPER_MODE" in the default attributes, with the instruction to set it FALSE if the driver doesn't support buffered mode. What precisely does this mean? I can't find this attribute documented anywhere.

[NathanT]

Hello pblase,
          Have you look at the ivifoundation.org website?  That is where all of the IVI specs can be found and that attribute should have documentation there.  Are you developing a new IVI Specific driver?  What instrument are you using?  Are you using the CVI Instrument Driver Wizard?  Let us know what you find on ivifoundation.org. 

Cheers,

NathanT

[z_haider]

pblase,

This attribute indicates whether instrument supports VISA buffered writes (VISA's VI_ATTR_WR_BUF_OPER_MODE). The default value is VI_FALSE. This is a vendor specific attribute used internally by the IVI Engine. It is not a standard IVI Foundation defined attribute.

See the documentation for VI_ATTR_WR_BUF_OPER_MODE in the VPP 4.3 specification for more information.

Many older instruments probably do not support the VI_ATTR_WR_BUF_OPER_MODE. The purpose of this attribute is for driver developers to indicate if the driver should attempt to set this mode before performing instrument I/O.

This attribute is rarely, if ever, used. Why are you using this attribute?

Zulfiqar

[pblase]

I'm not using it, just trying to figure out if I need to support it in the driver I'm writing.

Paul