Experimental Physics and
Industrial Control System

Jeff Hill <[email protected]> · Thu, 25 Sep 1997 10:57:35 -0600

Hello all,

> 	I want to read out a VME memory board using a waveform record.
> The VME memory board is located at 0x006c0000.  I want to readout 100
> unsigned long elements beginning at the memory board's base location.
> 
> 	In a response from Rozelle Wright, I found out that this problem
> has been solved by Andrew Johnson.  Below is a message from Andrew Johnson
> regarding the enhanced vxWorks variable support package.  Does there exist
> a version for R3.13 and has it been tested with R3.13?
> 

Some advantages of taking the time to write custom device support for 
your waveform device...

o vxMemProbe is used during initialization  (no bus error when card not present)
o sysBusToLocalAddr() or devLib style address mapping (database is CPU model
	independent)
o database addresses device by card number (easy to add additional cards and
	rearrange the address map without changing the database)
o synchronize the database with updates to the waveform (avoid fetching
	part of the waveform from one data take and part from another)
o diagnostics for this card show up in dbior() (IO reports)
o database can enter alarm state when the card is sick

Jeff
______________________________________________________
Jeffrey O. Hill                      Internet     [email protected]
LANL MS H820                    Voice         505 665 1831
Los Alamos NM 87545 USA   FAX          505 665 5107

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System