[avr-gcc-list] Troubles uploading to a Mega103

[Uwe Bonnes]

Ludovic COURTES writes:
...
 > As you can see, the 'Enable Programming' command (0xAC530000) works
 > fine, but then, the signature bytes are wrong. Moreover, the
 > strange thing is that it first time (after power-up) it returns
 > 0xFFFFFF as its signature bytes and then, if we don't switch it
 > off, it always returns 0x000102...  BTW, note that uisp continues
 > even if device is locked and then crashes... ;)
 > 
 > Well, if someone has already had this kind of problem, i would be glad
 > to know more about it !
 > 
Two ideas:

- your have some gate in some of the ISP lines, causing an inversion
- some more parts are conneted to the ISP lines and are not inactive
  during reset causing some contentions

Bye

--
Uwe Bonnes  address@hidden