Re: Mite documentation and data transfer with DMA

From: <tim.ousley_at_ni.com> · Date: Tue, 11 Jun 2002 16:34:36 -0500

Brent,

I don't think there has ever been a MITE RLPM.  Unfortunately I was not
able to identify a manual #321747c either.  This is the information you are
looking for though.  For both the MCR and the DCR registers, bits 9-10
specify the size of the transfer.  0,1=8bit; 1,0=16bit, 1,1=32bit transfer
sizes.  I think that I used 16 bit for both MCR and DCR when I wrote the
DMA code since AI and AO transfers are 16 bits.

Tim Ousley
SW Engineering
National Instruments

                      brent ledvina                                                                              
                      <ledvina_at_cornell         To:      comedi_at_stm.lbl.gov                                       
                      .edu>                    cc:                                                               
                      Sent by:                 Subject: Mite documentation and  data transfer with DMA           
                      comedi-admin_at_stm                                                                           
                      .lbl.gov                                                                                   

                      06/11/2002 01:42                                                                           
                      PM                                                                                         

In reading through mite.c I've noticed that the
mite_prep_dma() sets up 16 bit transfers. I'd like to change
this to 32 bits (using all the data lines on an
pci_dio_32hs) but am having trouble locating the mite
Register Level Programmer Manual (321747c.pdf) referenced in
mite.c

Does someone have this manual on hand?

thanks,
Brent

--

--------------------------------------------------------------
Brent M. Ledvina
ECE - Space Plasma Physics

Cornell University
301 Rhodes Hall
Ithaca, NY 14853
v 607.255.4641
f 607.255.6236
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