Hi,
>> How I can not acknowledge?
>
>The board you have connected to your parallel port connects the strobe and
>acknowledge pins, which acknowledges data as soon as it is output. By
>not having that connection, you wouldn\'t be acknowledging.
I disconnected that pins, it didn't help.
>> I checked, it works on some machines (generates square on pins - 0.5 Hz,
>> 50%),
>> but not on this one with main board:
>> ECS K7S5AL (SIS735),SND,DDR+DIMM,LAN,ATX.
>
>What does it do on that one? Something or nothing?
So, after Linux starts D7 is HIGH, D0 is LOW (I didn't check
others pins), when I write 0x00 to port (using program I posted before),
D7 changes to LOW for few ms (I can't measure exactly) and then
returns to HIGH, D0 stay LOW.
When I write 0xff D7 stay HIGH, D0 changes to HIGH for few ms,
and then returns to LOW.
If I write 0x00 then 0xff and repeat it with no delay pins are generating
something.
>Are you sure that there is no other program accessing the parallel port?
>A printer spooler for example?
I'm sure, I don't have a printer and I didn't install any printing software.
I tried to use "short" - example driver form "Linux Device Drivers, 2nd Edition"
By Alessandro Rubini & Jonathan Corbet. It initializes with no problems
(first I removed ppdev and parport modules), and when I write to it (/dev/short0)
the problem is the same.
Regards,
Filip
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This archive was generated by hypermail 2b29 : Sun Apr 13 2003 - 06:39:45 EDT