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
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.
Kyle Kienapfel wrote:
On Fri, May 28, 2010 at 9:48 AM, fritz
An update on my microcontroller-based external
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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