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Re: AT91 EB40 timers
- From: Gary Thomas <gthomas at ecoscentric dot com>
- To: Pete Barrie <peter dot barrie at cis dot strath dot ac dot uk>
- Cc: eCos Discussion <ecos-discuss at sources dot redhat dot com>
- Date: 08 Aug 2002 09:55:38 -0600
- Subject: Re: [ECOS] AT91 EB40 timers
- References: <5.1.1.6.0.20020808164348.02b1f2b0@pophost.cis.strath.ac.uk>
On Thu, 2002-08-08 at 09:48, Pete Barrie wrote:
> On the AT91-EB40 board, Timer-0 is used for the system clock.
> I want to write an application that uses timer-1 and timer-2 .
> Are these safe(free) to use?
> I know that the following function makes use of timer-2:
> void hal_delay_us(cyg_int32 usecs) [in at91_misc.c]
> Is this actually used by any kernel functions? Am I likely
> to undermine any core functionality by using timer-2?
HAL_DELAY_US() is used by some I/O drivers if absolute [small]
timing is required. This is atypical though. To be sure of
any interactions, you could look for this macro in any of the
modules/drivers you are using.
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Gary Thomas |
eCosCentric, Ltd. |
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