Re: [avrdude-dev] Problems with STK500 protocol

[Matthias Weißer]

Jan-Hinnerk Reichert schrieb:

> > But if I use the AVRStudio to programm an
> > ATMega16 with my programmer it works only with every second page. I
> > write 0x00 to all pages. The first page is filled with 0x00, the
> > third page is filled with 0x00 and so on. But the second, fourth
> > ... Page are filled with 0xFF.
> >
> > Any ideas?
>
> Hi Matthias,
>
> it would be best to have a capture of the AVRstudio-traffic during 
> programming.

I knew. But thats not that easy when using USB. And I don't have an 
original STK500.

> I can think of two reasons for your problem.
> 1) Your programmer misses every other "Program Page"-command
> 2) There is a byte vs. word problem with the "Load Page"-command

3) Cmnd_STK_PROG_PAGE means not "Program one page" as I assumed. It 
means "Program n Pages". So the AVRStudio send's 256 Byte of data and 
this is enough to programm two pages on an ATMega16. And so every second 
page wasn't programmed because I misunderstood the documentation.


--
Matthias Weißer
address@hidden
http://www.matwei.de