Experimental Physics and
Industrial Control System

Andrew Johnson <[email protected]> · Mon, 30 Jun 1997 09:13:37 +0100

Marian ZUREK wrote:

> I noticed that in my VME 1 min= 90 s !!!
> I already send the question to tech-talk and recived answer (THANKS)
> saying that I have to recompile the base with small modifications.

Hi Marian,

I'm not sure if this is your problem, but if your mv167 clock is running
slightly slow (1 minute really takes 80 seconds rather than the 90 you
mentioned) you shouldn't have to rebuild anything to get it running at
the right speed.  The SPECIAL CONSIDERATIONS section of the vxWorks BSP
man page 'mv167' explains how to set the clock rate in the non-volatile
RAM, which you do once for each CPU card. Just type the following at the
vxWorks shell prompt:
  -> m 0xfffc00fe
  fffc00fe:  0000-21ee
  fffc0100:  0000-.   

  value = 1 = 0x1
  -> 

Then after you next reboot, the clock should run correctly.  If you
don't set this, the BSP assumes it is running on a 25MHz CPU so
everything happens extra slowly.

-- Andrew
   ___
 .'   `.	Andrew Johnson, Head of Electronics
/ Royal )	Royal Greenwich Observatory
\ Greenwich	Madingley Road, Cambridge, CB3 0EZ
| Observatory	Tel: +44 1223 374823   Fax: 374700
+----------	WWW: http://www.ast.cam.ac.uk/~anj

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System