I'm a new poster to this list. I'm a hardware engineer working on a data
collections system for a radiotelescope which is designed to read data
from a linear CCD into an industrial PC running RTLinux. The CCD
interface is all done in a Xilinx FPGA chip connected to an ECP port.
The data rate needed is about 150 kbytes/sec.
I have inherited this project from the fellow who designed it, as he is
no longer able to work on the project. The last status report is that
the parport driver we have is not capable of reverse channel DMA
operations at all. This is not good, as we need to have the CPU time
available for various other activities.
I read through the parport_pc.c driver code in use and I agree that
there's no such DMA support. This code file doesn't have a version
number, but the last update comment is "Various hacks, Fred Barnes,
So, question time...
Is there any version of Linux whose parport driver is capable of reading
in data via DMA?
If not, is anyone working on this feature?
Thanks in advance for your help.
--David Forbes, SMTO, Steward Observatory
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This archive was generated by hypermail 2b29 : Wed May 15 2002 - 13:24:06 EDT