Most likely you will have to write your own function/routine/module.
Good news there are many tutorials and examples with source code on the
web. Try googling on "interfacing parallel port" for starters
Regards
John W.
Chris Jenks wrote:
On Tue, 4 Apr 2006, John Wojnaroski wrote:
Not knowing the details of your board, it is a little tough to
propose a better solution, but here goes.
Since your using the parallel port, you should consider an interrupt
based driver, have the board provide the interrupt signal when the
A/D conversion is completed. Most A/D chips provide a sense line that
indicates when the converion is completed and the data can be read.
that way you don't have to "wait" for the board.
Connect the sense line to the interrupt pin on the parallel port.
Then create a tasklet that is called by the driver to move the data
from kernel space to user space.
This is a bit more complex than a simple polling scheme, but far more
elegant and reliable and totally independent of CPU speed or
processor performance. Odds are you won't even notice the short time
the CPU is servicing the interrupt.
Regards
John W
Dear John,
That sounds like the best solution. The A/D IC does have an End Of
Conversion pic that I can connect to any of the parallel port inputs.
I'm relatively new to C. Do you know of a function I can cell that
would wait for an interrupt from the parallel port, or is it necessary
for me to write one?
Yours,
Chris
_______________________________________________
vox-tech mailing list
[email protected]
http://lists.lugod.org/mailman/listinfo/vox-tech
_______________________________________________
vox-tech mailing list
[email protected]
http://lists.lugod.org/mailman/listinfo/vox-tech
