Re: NI MIO "auxiliary" channel (i.e. on-board temperarure sensor)

On Wednesday 19 July 2006 01:35 am, David MacMahon wrote:
> Thanks, Frank.  Using the current ni_mio_common.c as my reference, I can
> see how to use this to include one calibration source in a cmd's
> chanlist by preconfiguring with INSN_CONFIG_ALT_SOURCE and then
> including one channel in the that has the CR_ALT_SOURCE flag.  I don't
> know whether this is a limitation of just the NI drivers, my
> understanding of how to use this, or the design, but I can't see how to
> include two different CR_ALT_SOURCE channels in a cmd's chanlist.

No, you can't.  The calibration sources are always read from channel 0 
anyways.

> Furthermore, at least on the E series NI MIO boards, the on-board
> temperature monitor lives in a different "channel space" ("auxiliary" is
> the word that NI uses) from the calibration sources.  There appears to
> be no way to get the NI driver to select the temperature monitor as an
> input using CR_ALT_SOURCE/INSN_CONFIG_ALT_SOURCE.

What documentation are you using to figure out how to access the 
temperature monitor?  I don't remember seeing anything about it.

-- 
Frank