Re: [avr-gcc-list] Programming Circuit for AVRDUDE

[Larry Barello]

The STK500 has both a serial and a parallel programmer built in.  It is VERY 
nice for
recovering the stray CPUs.  For example, I recently made 100 boards of 
something and out
of the first 20 boards I programmed, two of the CPU's had the wrong fuse bits 
set
(external oscillator).  This is, apparently, from the factory!  I didn't need 
the
parallel programmer for that problem since I had the STK500 (built in 
oscillator), but
similar things happen where the *only* way to recover is with a proper parallel
programmer.

If you do build the sp12 programmer, the following will add support for the sp12
programmer to Avrdude (add to the avrdude.conf file).  AvrDude is a very nice,
extensible, programmer!

programmer
  id    = "sp12";
  desc  = "Steve Bolt's Programmer";
  type  = par;
  vcc = 4,5,6,7,8
  reset = 3;
  sck   = 2;
  mosi  = 9;
  miso  = 11;
;


----- Original Message ----- 
From: "Heiko Rosemann" <address@hidden>
>
> On Fri, 13 Jun 2003, Donovan Parks wrote:
>
> > Hello,
> >
> > My question: is there a simple (i.e. something that could be built on a
> > breadboard) programming circuit that can be used to program AVR's.  I have
> > read through the AVRDUDE manual and it seems promising, but does not contain
> > any information on the circuits themselves.  Are there major limitations to
> > programming AVR's in this manner (as opposed to using an STK500)?  What will
> > I not be able to do (there is some meantion of certain fuses not being
> > accessible in parallel or serial programming modes)?
>
> I really can recommend sp12 for this - 3 Cs, 4 Rs and a crystal on the
> parallel port. It works for me quite well, without external power supply.
>
> Check http://www.xs4all.nl/~sbolt/e-spider_prog.html
>
> Of course, as with every serial programmer, you won't be able to set certain
> fuse bits on certain AVRs, but isn't the STK500 a serial programmer too? At
> least the STK300 was...
>