Fw: Command_&_ciodas16/330_problem

> Hi,
>
> Thanks for your fast response, Frank.
>
> Sorry for the confusion. What I meant was the manual of the motherboard of
> the PC (PC-620). In that manual, the DMA channel Nr. 1 is assigned to IBM
> SDLC. The DMA switch on my measurement board is set to 1, which I thought
> was a default position. I did not know that DMA Level was the same as DMA
> Channel. Measurement Computing mentions that setting DMA Level to 3 can be
> necessary for older types of computers (XT etc) for which the harddisk
might
> use
> DMA Level 1. So, your question, Frank,  led me to the trial of setting the
> DMA Level of the cio-das16/330 to 3 and initializing the device setting
the
> DMA option to No. 3. A look in the /proc/dma shows that DMA 3 is assigned
to
> das16. Unfortunately, I get exactly the same result as previously
mentioned.
>
> When I run example 'tut1' I get a value like 1.3 million something. I
> suppose the output should be between 0 and 4096. How can it get bigger
than
> 4096? Pointer problem? The latter result was what I got when using comedi
> 0.7.65. Now I have the 0.7.66-verison which gives the strange output. It
> might be a coincidense. I did not note any errors or the like when I
> compiled the new version. The Linux kernel is the 2.4.18 from kernel.org.
> Maybe there is some important option I have disregarded when compiling the
> kernel?
>
> The CPU (motherboard's) is an Intel PIII Coppermine, 800 MHz, 256kb Cache.
>
> If you have more hints in stock or anyone else, I would be most happy.
>
> /Daniel
>
>
> ----- Original Message -----
> From: "Frank Mori Hess" <fmhess_at_users.sourceforge.net>
> To: "Daniel L Sandin" <daniel.larsson_at_dynalyse.se>; <comedi_at_comedi.org>
> Sent: Friday, December 13, 2002 00:30
> Subject: Re: Command_&_ciodas16/330_problem
>
>
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> On Thursday 12 December 2002 12:01 pm, Daniel L Sandin wrote:
> >
> > According to the PC-board's manual, DMA channels 0,5-7 are available,
but
>
> What manual are you talking about?  Das-16 boards can only be set to use
dma
> channels 1 or 3, and you will need a dma channel to run commands.
>
> - --
> Frank
>
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Received on 2002-12-13Z07:55:47