Experimental Physics and
Industrial Control System

[email protected] · Fri, 5 Mar 2010 17:08:32 +0100

Hi all,

I found, that in recent firmware versions (1.31) of the MAXv cards the 
command to set
negative encoder resolutions (e.g. "AX ER-2,3") as used by the MAXv driver 
does not work any more.
Instead a command error is returned and the encoder resolution will remain 
unchanged.
I couldn't find this "new feature" documented anywhere.

For the MAXp-card I verified, that this behaviour was introduced between 
firmware versions 1.29 and 1.31.

The workaround is to not use negative encoder resolution, instead reverse 
the encoder direction
with the new EDI command in the init-string.

-------

If using RTEMS the ioc crashes, when calling sprintf in interrupt context 
(motorIsr() in drvMAXv.cc) .
I assume, calling sprintf() in interrupt context is not allowed in RTEMS?

Jens

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System