Re: [avrdude-dev] JTAG ICE mkI support added

[Joerg Wunsch]

As Brian Dean wrote:

> Avrdude cannot seem to initialize the JTAGICE from a cold power-on.
> Here's what I get when attempting to access it from a power-on reset
> of the JTAGICE:

> But if I first access it with my old copy of avarice, that works OK.
> Then if I use avrdude, it works with the device as normal.  ...

Sigh.

See this comment in AVaRICEs source code:

// 'S  ' works if this is the first string sent after power up.
// But if another char is sent, the JTAG seems to go in to some 
// internal mode. 'SE  ' takes it out of there, apparently (sometimes
// 'E  ' is enough, but not always...)
sendJtagCommand((uchar *)"SE  ", 4, &tries);

I've added something similar to the sync logic in avrdude now.  I hope
that gets you running as well.  I can definately see differences on my
clone after a powerup, too, although the effect was not fatal here but
I've got the wrong response to the hard/software version inquiry.
This is gone now with the changed code, so I hope it'll also fix your
problems.

-- 
cheers, J"org               .-.-.   --... ...--   -.. .  DL8DTL

http://www.sax.de/~joerg/                        NIC: JW11-RIPE
Never trust an operating system you don't have sources for. ;-)