[En-Nut-Discussion] Diagnosing an Ethernut

[Grzegorz Nosek]

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Ole Reinhardt wrote:
| Hi,
|
| Might you have set any lock fuses? In this case it could be possible
| that you set the write lock bit. In this case you manualy have to
| configure uisp (don't know if you can, but with sp12 you definatly can)
| to the ATMega and then erase the whole chip. This will set back the
| write lock fuse.

I haven't played with the fuses (I know I can screw up my Ethernut this
way and I never had the need). Is there any possibility they could
reprogram themselves? (a stray current in exactly the wrong place etc.)
I'll get my isp adapters back and try to restore them.

|
| Even worse, you could have disabled isp programming at all. In this case
| you only can reenable the isp interface with a JTAG interface... (e.g.
| JTAG-ICE with AVRStudio).

I'll ask at my electronics lab at my univ, maybe they have a JTAG :)

|
| Bye,
|
| Ole
|
|

Regards,
~ Greg
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