Re: [avrdude-dev] Programmer errors on linux, help!

[Francisco T. A. Silva]

Hi Janusz,

Sometime ago I had a problem like yours and traced it to the SiS chipset
(on Duron/Athlon mainboards). The parallel port shows spurious activity,
impairing software like avrdude, uisp, Ponyprog. Oddly enough, the
parallel printer works! So far no solution short of switching to another
mainboard, far and away from Sis, or installing an extra parallel port card.

Regards,
--
Francisco

PS: the problem was linux only, in widoze everything worked fine.

Janusz Dobrowolski escreveu:
> Hi all!
>
> I use avrdude with parallel programmer (alf type hardware) on my linux box 
> (Celeron 233 / Debian 3.0) with no pronblems. But on my other computer (AMD 
> Duron 1000/Debian 3.0) avrdude fails. The program contacts programmer,
> read IC signature bytes (ok) and try to program device. Verifying fails on 
> first bytes. 
> When When I try rerd IC some times, consecutive reads differs. Most often 
> there are only 0xff's read, sometimes some beginning bytes are read ok. 
>
> I done some tests in avrdude terminal mode, and again - on programmer startup
> device signature is read, and then every reading returns 0xff. But
> executing (on ATmega16) command:
> send 0xac 0x53 0 0 (enter programming mode)
> returns good result: ff ff 53 00  !
>
> I tried to change timing by setting SLOW_TOGGLE 1  in par.c, 
> but it hangs programmer.
>
> Tests where done on at90s2313 and ATmega16, result is the same.
>
> Any suggestions ?
>
> janusz
>
>
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