Re: EasyAVR problem
- From: Ico Doornekamp <ico@xxxxxxxx>
- Date: 25 Jul 2005 17:48:48 GMT
> Now, my problem was, I couldn't write anything into the chip (90S8515).
> This studio could connect to the board, read the EEPROM and program,
> but if I tried to erase or write something back, it was always failing,
> without any specific error.
Hi Goran,
You might want to check the settings of the fuse bits of your processor. AVR
microcontrollers have a few special memory locations which can be programmed
separately from flash and eeprom, called 'fuses'. One of those fuse bits is
used to write-protect the internal flash/eeprom.
The fuse bits can usually be configured in your programming software, look
for 'Memory lock bits' settings somewhere. Be careful with the fuses though,
since its easy to disable serial programming mode or stop the internal
clock, thus 'breaking' the device (not really broken, but you can't recover
with only a serial programmer)
_Ico
--
:wq
^X^Cy^K^X^C^C^C
.
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