From: Simon Kallweit <simon.kallweit@intefo.ch>
To: Nick Garnett <nickg@ecoscentric.com>
Cc: ecos-patches@ecos.sourceware.org
Subject: Re: cortexm fix rtc
Date: Tue, 04 Nov 2008 18:53:00 -0000 [thread overview]
Message-ID: <491099E6.5000405@intefo.ch> (raw)
In-Reply-To: <m3d4hbbbbr.fsf@xl5.calivar.com>
Nick Garnett schrieb:
> "simon.kallweit@intefo.ch" <simon.kallweit@intefo.ch> writes:
>
>
>> This patch fixes a small issue with the SysTick reload value (this has
>> to be period - 1) and fixed wrap-around in the hal_delay_us() function.
>>
>
> The -1 on the period is OK.
>
Fine.
> However, I don't see the point in the change to HAL_DELAY_US(). As far
> as I can tell it has exactly the same effect, or am I missing
> something?
>
Do a series on paper, it's not the same. When the wrap around occures,
you will add to the us counter. The 100ms delay on a redboot reboot
never returned. With this fix, it actually takes 100ms :)
Simon
next prev parent reply other threads:[~2008-11-04 18:53 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-11-04 15:54 simon.kallweit
2008-11-04 18:23 ` Nick Garnett
2008-11-04 18:53 ` Simon Kallweit [this message]
2008-11-05 10:02 ` Nick Garnett
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