Experimental Physics and
Industrial Control System

SUMMARY:

On the MVME162 the VME standard access is done via the second I/O map decoder,
not through one of the programmable map decoders. So it is necessary to disable
the second I/O map decoder and then enabled the second programmable map decoder.

In sysLib.c original version:
    temp = *VMECHIP2_LBTVCR & 0xffff0fff;
    *VMECHIP2_LBTVCR		 = temp          |
				   LBTVCR_I2SUP  |
				   LBTVCR_I2DATA |
				   LBTVCR_I2EN; 
change to

    temp = *VMECHIP2_LBTVCR & 0xffff0fff;
    *VMECHIP2_LBTVCR		 = temp; /* disable io map decoder 2 */

and then add

    *VMECHIP2_LBSAR2		= 0xf0fff000; /* start and end address */
    *VMECHIP2_LBSAR		 &= ~LBSAR2_D16;  /* no D16 as default */
    *VMECHIP2_LBSAR		 |= LBSAR2_AM_STD_USR_DATA |
					LBSAR2_D32;       /* but allow D32 */
    *VMECHIP2_LBTVCR		|= LBTVCR_EN2;    /* enable second programmable
map decoder */

replace the following 2 lines 
    /* make sure map 2-4 is disabled */

   *VMECHIP2_LBTVCR		&= ~(LBTVCR_EN2 | LBTVCR_EN3 | LBTVCR_EN4);

with 
    /* make sure map 3-4 is disabled */
    *VMECHIP2_LBTVCR		&= ~(LBTVCR_EN3 | LBTVCR_EN4);

References:

Problem with MVME162 and A24/D32 or D16 access to SIAM Burkhard W. Kolb

Navigate by Date:

Prev: Re: Problem with MVME162 and A24/D32 or D16 access to SIAM Perry L. Anthony

Next: The Future of vxWorks/Tornado Andrew Johnson

Index: 1994  1995  1996  1997  1998  1999  <2000>  2001  2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  2017  2018  2019  2020  2021  2022  2023  2024 

Navigate by Thread:

Prev: Re: Problem with MVME162 and A24/D32 or D16 access to SIAM Perry L. Anthony

Next: Re: Problem with MVME162 and A24/D32 or D16 access to SIAM saa

Index: 1994  1995  1996  1997  1998  1999  <2000>  2001  2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  2017  2018  2019  2020  2021  2022  2023  2024