[ECOS] Microsecond delay

[ECOS] Microsecond delay

[Chandra Sekhar G]

Hi,

    I have eCos sources for the MPC555.   It seems it does not provide
the microsecond delay functionality.  I downloaded the file  hal_if.h
which has the macros defined for that.  How can I integrate this with my

eCos source?

Thanks.

regards,
chandra

Re: [ECOS] Microsecond delay

[Jonathan Larmour]

Chandra Sekhar G wrote:
> 
>     I have eCos sources for the MPC555.   It seems it does not provide
> the microsecond delay functionality.  I downloaded the file  hal_if.h
> which has the macros defined for that.  How can I integrate this with my
> 
> eCos source?

The MPC555 port probably doesn't have virtual vector support at all. That
would need to be implemented first before implementing the us delay
functions. Look at the porting guide in the online docs. Particularly
http://sources.redhat.com/ecos/docs-latest/porting/hal-calling-if.html

Alternatively if all you want is the microsecond delay, just write your own
self-contained function to do so using delay_us() in
hal/common/current/src/hal_if.c as a guide to what you should do. If you
are using this with the eCos kernel, you can just use that bit of the
delay_us functino without modification. Note that it is a busy wait though.

Jifl
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Re: [ECOS] Microsecond delay

[Christoph Csebits]

On Fri, Jul 13, 2001 at 12:48:18PM +0700, Chandra Sekhar G wrote:
>    Where can I find the macro CYGACC_CALL_IF_DELAY_US, in the ecos
> repository?
$ECOS_REPOSITORY/hal/common/current/include/hal_if.h

> Is it supported on PowerPC targets?
yes
 
-- 

[ECOS] Microsecond delay

[Chandra Sekhar G]

Hi,

   Where can I find the macro CYGACC_CALL_IF_DELAY_US, in the ecos
repository? Is it supported on PowerPC targets?

Thanks,

regards,
chandra