Messages in this thread | | | Date | Mon, 16 Aug 1999 16:38:58 -0300 (EST) | From | Raul Dias <> | Subject | Re: Problems writting a CHAR Driver with interruptible_sleep (wait_ queu e) |
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On 16 Aug, Matthew Kirkwood wrote: > On Mon, 16 Aug 1999, Raul Dias wrote:
>> It will be thousands of readings in a second, so I can't "hang" the >> machine. > > Oh. Out of curiosity, how do you expect to do thousands of reads per > second when you have a thousandth of a second between them? :)
Well, I changed it to udelay(80) the time the Board need to read data. It gave me 103 reads in one jiffy. 103*100 = 10300 reads/sec.
So, that's the problem I *need* to differenciate time here - 103 readings with the same time doesn't help :-).
> Seriously, you probably want to look at the PC speaker driver patch - > this did some pretty hairy modifications to the timer interrupt stuff > to have it use the RTC instead of the usual PC timer chip, I think.
Ok. Now a stupid question :-) How do I use RTC? Where can I find any documentation? Example (besides the PC Speaker one.
> > Platforms. The TSC is an i386 thing, though other architectures often > have similar features. Either way, it's only really useful for > busy-waiting and accurate timing measurements anyway. > >> Where can I find more info about it? > > grep the source for CONFIG_M586TSC, or visit www.intel.com.
I will :-) Is there any function I can use?
Raul Dias
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