Subject: Re: Writing EEPROM on FT232R / FT245R
Karl Cunningham wrote:
> I just subscribed to this list because I had the same situation as
> Marius Kintel did in his original post of the thread started on 25 Feb
> 2009 -- trouble programming an FT245R with libftdi. My apologies that
> this message will likely not be threaded into the original in the archives.
> In the email in this thread on 12-Mar-09 from Jim Paris and in the FTDI
> datasheet, I see mention of setting the latency timer to 77 (decimal)
> milliseconds to program the FT245R. The patch appears to set it to 0x77
> (hex) ms.
> I assume the value of 77ms is a minimum and 0x77 seems to work fine too,
> but I wanted to point this out in case it matters to anyone.
I'm aware of this discrepency -- it's from the FTDI document at
which says 77ms. I'm pretty sure this is just a typo, and it should
have read 119ms.
0x77 is the number we want, since that's what the AN-105 example code
shows, it's what MPROG uses under Windows, and it's what the D2XX
Linux drivers use in FT_EE_Program.
libftdi - see http://www.intra2net.com/en/developer/libftdi for details.
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