[Xenomai-core] a problem about hpet device

[Xenomai-core] a problem about hpet device

[Guanghui, Cheng]

[-- Attachment #1: Type: text/plain, Size: 221 bytes --]

Hello:
	I need to use hpet device as my clock event source in my os
and i have mapped this device to local place. But when i read the
configuration or value all the bit is 1. Is it something wrong?
	Thanks
						Guanghui

[-- Attachment #2: Type: text/html, Size: 690 bytes --]

Re: [Xenomai-core] a problem about hpet device

[Gilles Chanteperdrix]

Guanghui, Cheng wrote:
> Hello:
> 	I need to use hpet device as my clock event source in my os
> and i have mapped this device to local place. But when i read the
> configuration or value all the bit is 1. Is it something wrong?

Excuse me, but what is the relation with Xenomai?

-- 
					    Gilles.

Re: [Xenomai-core] a problem about hpet device

[Guanghui, Cheng]

[-- Attachment #1: Type: text/plain, Size: 748 bytes --]

On Thursday 05 November 2009 07:53:26 Gilles Chanteperdrix wrote:
> Guanghui, Cheng wrote:
> > Hello:
> > 	I need to use hpet device as my clock event source in my os
> > and i have mapped this device to local place. But when i read the
> > configuration or value all the bit is 1. Is it something wrong?
>
> Excuse me, but what is the relation with Xenomai?
	Sorry and maybe it is not a direct topic about the Xenomai 
but about the real-time systems. I have traced Xenomai at least 
for 4 years and read every mail from this maillist. HPET is a very 
good internal timer source for real-time systems. Hopefully there
 are some people doing HPET issue.  If there is no guy about 
this work please ignore this mail.
	Thanks.
							Cheng Guanghui


[-- Attachment #2: Type: text/html, Size: 1352 bytes --]

Re: [Xenomai-core] a problem about hpet device

[Jan Kiszka]

[-- Attachment #1: Type: text/plain, Size: 914 bytes --]

Guanghui, Cheng wrote:
> On Thursday 05 November 2009 07:53:26 Gilles Chanteperdrix wrote:
>> Guanghui, Cheng wrote:
>>> Hello:
>>> 	I need to use hpet device as my clock event source in my os
>>> and i have mapped this device to local place. But when i read the
>>> configuration or value all the bit is 1. Is it something wrong?
>> Excuse me, but what is the relation with Xenomai?
> 	Sorry and maybe it is not a direct topic about the Xenomai 
> but about the real-time systems. I have traced Xenomai at least 
> for 4 years and read every mail from this maillist. HPET is a very 
> good internal timer source for real-time systems. Hopefully there
>  are some people doing HPET issue.  If there is no guy about 
> this work please ignore this mail.

This is clearly off-topic for Xenomai. And note: HPET is not the best
timer source as it doesn't scale (in contrast to LAPIC timers).

Jan


[-- Attachment #2: OpenPGP digital signature --]
[-- Type: application/pgp-signature, Size: 257 bytes --]