[ECOS] eCos Watchdog Timer

[ECOS] eCos Watchdog Timer

[diem.b.dang]

I'm looking for the information how to use this feature of "Watchdog Timer" in
NEC/V850.
Are there such feature or similar feature from eCos ?

All responses are appreciated.

TIA
Diem

Re: [ECOS] eCos Watchdog Timer

[Wolfram Kattanek]

diem.b.dang@delphiauto.com:

> I'm looking for the information how to use this feature of "Watchdog Timer" in
> NEC/V850.
> Are there such feature or similar feature from eCos ?

If you think of the V850 hardware watchdog timer capabilities
then look at ecos/packages/hal/v85x/ceb_v850/current/src/plf_stub.c as an
example. The watchdog timer is used for the breakpoint emulation inside
the GDB stub. The V850 watchdog timer can generate NMIs or INTs (see
V850 user manual).

If you think of a watchdog functionality inside eCos then just include
CYGPKG_IO_WATCHDOG in your eCos configuration. This will give you emulated
watchdog functionality (using real time clock and alarm). You can also add
your own hardware watchdog driver (currently there is no driver for the V850).
There are some examples in ecos/packages/devs/watchdog for this kind of driver.

Wolfram
--
Wolfram 'L.A.' Kattanek     Institut fuer Mikroelektronik- und
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Re: [ECOS] eCos Watchdog Timer

[Jonathan Larmour]

Wolfram Kattanek wrote:
> 
> diem.b.dang@delphiauto.com:
> [snip]
> If you think of the V850 hardware watchdog timer capabilities
> then look at ecos/packages/hal/v85x/ceb_v850/current/src/plf_stub.c as an
> example. The watchdog timer is used for the breakpoint emulation inside
> the GDB stub. The V850 watchdog timer can generate NMIs or INTs (see
> V850 user manual).
> 
> If you think of a watchdog functionality inside eCos then just include
> CYGPKG_IO_WATCHDOG in your eCos configuration. This will give you emulated
> watchdog functionality (using real time clock and alarm). You can also add
> your own hardware watchdog driver (currently there is no driver for the V850).
> There are some examples in ecos/packages/devs/watchdog for this kind of driver.

Of course if you add a hardware watchdog driver, it will break the use of
the watchdog for breakpoint emulation be warned...

Jifl
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