Re: [avrdude-dev] CODE for FTDI bit-bang support

[cb750]

Wonderful!   2 questions though:  Are they fast?  And are they going to 
be in an official release?

Also I can help test these on Windows if needed, as I have a UM245R test 
rig here with various ATmega/ATtiny.  Someone may have to send me the 
binaries though.  I have poor luck getting most open source projects to 
compile due to external dependencies, wide assortment of different build 
tools, etc.  I have the usual Micro$oft tools and Cygwin, plus avr-gcc 
and Tcl/Tk.

--
Mark Hubbard: cb 750 at com cast no spam dot net


Wouter van Gulik wrote:
> There are already different patches for AVRDUDE to support programming 
> via FTDI devices:
>
> Bit bang mode
> http://savannah.nongnu.org/patch/?4330
>
> SPI/MPSSE based
> http://savannah.nongnu.org/patch/?6502
>
> Although both maybe a bit old.
>
> HTH,
>
> Wouter
>
> Stanislav Likavcan schreef:
> > Hi,
> >
> > There is an older version of AVRDUDE which supports FTDI available here:
> > http://www.geocities.jp/arduino_diecimila/bootloader/index_en.html
> >
> > I have been using above sources with UM232R (as bread board 
> > programmer) for quite some time (almost a year) with no issues on Mac 
> > OS X, although I modified the code to make it working with latest 5.6 
> > release. It is still not entirely clear to me, why this isn't part of 
> > official release, but never mind as long it works everything fine.
> >
> > If anyone interested I can provide sources. These work on Mac and 
> > Linux, however not sure about Windows.
> >
> > Regards,
> > Stan
> >
> > On 19 May 2009, at 01:18, address@hidden wrote:
> >
> > > Hi all,
> > >
> > > I wrote some code you might be able to adapt & use in AVRDUDE.  I'd 
> > > been using AVRDUDE to flash programs into my AVR's through the PC's 
> > > built-in parallel port (bit-bang).  Loved it.  Used the AVR's 
> > > built-in serial download (SPI-like) capability.  Then I was hoping to 
> > > do something similar with my laptop & other PC's that don't have 
> > > parallel ports, using instead a plain old FTDI UM245R / FT245R.  But 
> > > AVRDUDE doesn't seem to support that.  Searching old messages with 
> > > Google indicated it hadn't worked out in the past.  Well, last night 
> > > I made it work, and work FAST.   Flashing AND VERIFYING with 
> > > read-back a 160 byte program took about 3 seconds total.  Some of 
> > > that was sleep time, e.g. in between flash pages, so could be reduced 
> > > if you understand how to poll the AVR for readiness etc.  This method 
> > > uses very few round trips to the FTDI chip, so it should scale up to 
> > > larger programs very well.
> > >
> > > I was able to do it using nothing but the AVR, the FTDI, and 3 series 
> > > resistors that might not even be needed (for current protection).  
> > > The FTDI UM245R costs about $19 in a 24-DIP module with USB 
> > > connector.  It's used in Synchronous Bit Bang mode, which seems to be 
> > > also supported by the recent 232-type chips.
> > >
> > > The code is in C# but the algorithm should easily adapt to C++ or 
> > > other languages.  It uses the standard FTDI D2xx DLL on Windows.
> > >
> > > Reply if you think this would help with AVRDUDE, or just want to talk 
> > > about it.  Personally I'd like to use AVRDUDE for this task instead 
> > > of my own code, as I like AVRDUDE's terminal capability, and fuse 
> > > programming etc.
> > >
> > > --
> > > Mark Hubbard: cb 750 at com cast no spam dot net
> > >
> > >
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> >
> >
> >
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