[flashrom] External programmer update

[Reinder de Haan]

Hi,

I have some success using flashrom >serprog _> own avr frimware.

it needs some polishing the i will release schematics + source.

i doupt shift regs is the way to go..
i used a 74act574 (8 bit latch) for the low 8 bits
and dedicated io for the high bits (the other way around would have been 
  better)
if you used one 574/8 address bits you only need 8+<chip ctrl 
lines>+<(adresslines+7)/8)> io pins.
best would be to use a whole port for the datapins..

i will do a arduino posrt shortly.

greetings,
Reinder

Kyle Kienapfel wrote:
> On Fri, May 28, 2010 at 9:48 AM, fritz <fritzlists at gmail.com> wrote:
>> An update on my microcontroller-based external serial programmer:
>>
>> It works.
>>
>> I can program 5V-only chips, in DIP32 form, or PLCC32 with an adapter.  The
>> highest baud rate I've been able to make work is 115200, which makes things
>> pretty slow.  Further experimentation may show that I could run a higher
>> baudrate and maybe remove most of the `noop` delays in my I/O routines - but
>> that's for another day.
> 
> 
> I was thinking of programming 2mbit flash chips with shift registers
> and an regular arduino and it didn't occur to me to use flashrom as
> software. When I get around to using them I might just have to spring
> for a megaduino. Sweet!
> 
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