Experimental Physics and
Industrial Control System

马晓媛 <[email protected]> · Tue, 26 Apr 2011 11:09:12 +0800 (CST)

Thank you!

The information you maybe need:
CPU board: Motorola MVME 5100
OS :       VxWorks 5.4
EPICS:     3.13.8
driver:    I modified the driver of VMIVME 4100 coded by Bob Dalesio
( I didn't modified the driver much, which mainly about some configuration information,like channels number, data structure info and so on.)

I configure one 4105 board in an EPICS application's start-up file--st.cmd.
Code like: vmi4105_cnfg(0,0x0000)
Then I download the application on the vxWorks oprating on the MVME 5100 CPU board.
It return OK. 4105 was configured correctly.

Then I display the register on the board:
--------------------------------------------------------------------------------------
-> d 0xfbff0000
fbff0000:  00ff 00ff 00ff 00ff 00ff 00ff 00ff 00ff   *................*
fbff0010:  ffff ffff ffff ffff ffff ffff ffff ffff   *................*
fbff0020:  ffff ffff ffff ffff ffff ffff ffff ffff   *................*
------OK

-> m 0xfbff0000
fbff0000:  00ff-c300  (I only modified first byes.)
fbff0002:  c3ff-.

value = 1 = 0x1  (1 means read-only?)
-> d 0xfbff0000
fbff0000:  c3ff c3ff c3ff c3ff c3ff c3ff c3ff c3ff   *................*  (All of them was modified.)
fbff0010:  ffff ffff ffff ffff ffff ffff ffff ffff   *................*
fbff0020:  ffff ffff ffff ffff ffff ffff ffff ffff   *................*

-------(c3 was the basic configuration. The lower 8bits was reserved, and they cannot be wrote to 0)

-> m 0xfbff0000
fbff0000:  c3ff-74bb  ( D15 is 0, 4bbb is the channel signal)
fbff0002:  c3ff-6bbb  ( D15 is 0, bbb is the channel signal)
fbff0004:  c3ff-.

value = 1 = 0x1
-> d 0xfbff0000
fbff0000:  c3ff c3ff c3ff c3ff c3ff c3ff c3ff c3ff   *................*
fbff0010:  ffff ffff ffff ffff ffff ffff ffff ffff   *................*
fbff0020:  ffff ffff ffff ffff ffff ffff ffff ffff   *................*

---------As you see, They are not modified, even if I input all the 8 channels signals.)
---------Why??
---------But,it could be wrote to other configure information.

-> m 0xfbff0000
fbff0000:  c3ff-8bbb
fbff0002:  8bff-.

value = 1 = 0x1
-> d 0xfbff0000
fbff0000:  8bff 8bff 8bff 8bff 8bff 8bff 8bff 8bff   *................*
fbff0010:  ffff ffff ffff ffff ffff ffff ffff ffff   *................*
fbff0020:  ffff ffff ffff ffff ffff ffff ffff ffff   *................*

----------------------------------------------------------------------------------------
Above shows the errors I come across.

Besides, 4105 has an address modifier response jumper JA.The DAC board is memory mapped in the short I/O address space .To select non-privileged short I/O Access, install jumper at JA.

My board is installed jumper JA.---non-privileged short I/O Access.

The code in driver: status = sysBusToLocalAdrs(VME_AM_SUP_SHORT_IO ,(char *)addr,(char **)&pcard);
( addr is the address I input. pcard returns the local address.)
In sysBusToLocalAdrs, I select VME_AM_SUP_SHORT_IO Address Modifier code.

So, it seems that the hardware configuration and software configuration is inconsistent.But it works well.

I tried remove the jumper of JA, so board response to supervisory short I/O access. But it cannot be configured. 4105 board cannot be found.

I don't know where the errors happened and I don't have idea about the next steps I can try.

I'm looking forward to your response. Thank you very much. ^_^

Ma Xiao yuan

> -----Origin email-----
> From: "Andrew Johnson" <[email protected]>
> Sent Time: Tuesday, April 26, 2011
> To: [email protected]
> Cc: "马晓媛" <[email protected]>
> Subject: Re: VMIC VMIVME 4105 register cannot be modified?
> 
> Hi,
> 
> On Sunday 24 April 2011 22:26:44 马晓媛 wrote:
> > 
> > I worked with VMIVME 4105, but now it comes across some problem that I
> >  cannot handle.VMIVME 4105 is a 8channel 12bits multiplying DAC board. I
> >  modified the driver of VMIVME 4100 to 4105's driver. VMIVME 4100 is a
> >  16channel 12bit DAC board. They are alike.
> ...
> > Now I can configure the CSR, BUT, I cannot write D15 to "0" to write data
> >  to DAC channels. Why? I need your help. Thank you very much!^_^
> 
> When you say you cannot do that, what actually happens when you try writing a 
> 16-bit value with D15=0 to one of the DAC OUT registers?
> 
> Please copy & paste and command you're using and the error messages you see 
> directly from the system console, and include more information rather than 
> less if you're not sure what might be relevant.  You should also explain what 
> CPU board, OS version and driver you are using.  We can't help you very much 
> without knowing more about what you are doing.
> 
> - Andrew
> -- 
> An error is only a mistake if you don't learn from it.
> When you learn something from it, it becomes a lesson.

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System