From: "Paul D. DeRocco" <pderocco@ix.netcom.com>
To: "eCos Discuss" <ecos-discuss@ecos.sourceware.org>
Subject: RE: [ECOS] Re: In trouble of timer operations
Date: Wed, 04 Jun 2008 10:06:00 -0000 [thread overview]
Message-ID: <PGEAIGBPLOMOJDAPCOJHGECCLAAB.pderocco@ix.netcom.com> (raw)
In-Reply-To: <000a01c8c603$4d825dd0$1c0110ac@ariga>
> From: ariga masahiro [mailto:ariga@link-lab.co.jp]
>
> I am afraid I dig up the same question but I think this is important,at
> least for me,
> so please forgive my inquiring again.
> The problem is return_time of cyg_thread_delay.I am determined to
> use TMU1
> as Free-Run Counter(0xffffffff-0)
> and made function(HAL_CLOCK_READ1) to read TMU1 clock count.I am affirmed
> it's working correctry.
> I used it to calculate return time in hipri_test() in timeslice2.c.
> I am baffled by the result.
>
> --testing code
> hipri_test(CYG_ADDRESS id)
> {
> cyg_int32 start;
>
> while( 1 )
> {
> HAL_CLOCK_READ1(&start);
> diag_printf("id=hi 0x%x\n",start);
> cyg_thread_delay(1);
> cyg_thread_delay(2);
> }
> }
> I calculated several cases.
> (1) I only used cyg_thread_delay(2)
> (2) I used Andrew's proposition of using
> cyg_thread_delay(1),cyg_thread_delay(2) like above code.
> (3) same as (2) except changed cyg_thread_delay(2) to cyg_thread_delay(20)
> (4) only used cyg_thread_delay(20)
It's possible that there's something wrong with the timer configuration.
However, you won't find it out very easily with diag_printf, because it
probably takes longer than 10ms to execute.
I don't know what hardware you're using, but most evaluation boards have
utility LEDs or output port pins. Instead of outputting a message, toggle a
port pin and look at it with a scope or a frequency counter.
--
Ciao, Paul D. DeRocco
Paul mailto:pderocco@ix.netcom.com
--
Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos
and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss
next prev parent reply other threads:[~2008-06-04 10:06 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-01-07 23:59 [ECOS] Wrongfully compiled code ariga masahiro
2008-01-08 0:05 ` Gary Thomas
2008-01-08 1:05 ` ariga masahiro
2008-01-17 19:21 ` [ECOS] " Dave Lawrence
2008-01-17 23:50 ` ariga masahiro
2008-01-18 12:16 ` Dave Lawrence
2008-01-18 14:40 ` Gregg Levine
2008-01-18 15:44 ` Dave Lawrence
2008-01-18 15:49 ` Gregg Levine
2008-01-18 16:09 ` Dave Lawrence
2008-01-21 0:34 ` ariga masahiro
2008-02-04 1:49 ` ariga masahiro
2008-02-04 11:38 ` Dave Lawrence
2008-02-12 1:06 ` ariga masahiro
2008-02-12 10:55 ` Dave Lawrence
2008-02-22 4:57 ` [ECOS] How to re-install newly compiled gnutools ariga masahiro
2008-02-22 7:15 ` ariga masahiro
2008-05-16 8:13 ` [ECOS] When or on what condition does "deschedule" happen? ariga masahiro
2008-05-16 15:26 ` Andrew Lunn
2008-05-19 5:32 ` ariga masahiro
2008-05-19 13:18 ` Andrew Lunn
2008-05-19 13:31 ` Gary Thomas
2008-05-20 1:26 ` ariga masahiro
2008-05-20 12:18 ` Andrew Lunn
2008-05-23 7:38 ` ariga masahiro
2008-05-23 9:35 ` Nick Garnett
[not found] ` <000601c8c165$406e0970$1c0110ac@ariga>
2008-05-29 18:23 ` [ECOS] Re: In trouble of timer operations Andrew Lunn
2008-05-30 2:50 ` ariga masahiro
2008-05-30 3:09 ` Paul D. DeRocco
2008-05-30 4:11 ` ariga masahiro
2008-05-30 4:43 ` Paul D. DeRocco
2008-05-30 7:26 ` ariga masahiro
2008-05-30 7:47 ` Paul D. DeRocco
2008-05-30 8:03 ` ariga masahiro
2008-05-30 8:07 ` Andrew Lunn
2008-06-04 5:25 ` ariga masahiro
2008-06-04 10:06 ` Paul D. DeRocco [this message]
2008-06-05 6:14 ` ariga masahiro
2008-06-05 17:39 ` Paul D. DeRocco
2008-05-30 6:35 ` Andrew Lunn
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