F8 and a GPS -

Mikkel L. Ellertson mikkel at infinity-ltd.com
Wed Jul 2 15:43:16 UTC 2008

Gene Heskett wrote:
> My old Garmin 12 (yeah, it has gray hair) has a very dumb serial interface, so I 
> have to use an adapter to make it usb.
> And there are no intermittent connection problems?
> Maybe Prolific has quietly fixed that bug in later issues.  Mine are 5 or 6 
> years old, one I got from the shack, and another I got from Wallies a year or 
> so later.  Both of them have been problems.  I tried to use one to connect to a 
> ups, but every time it dropped the connection, the ups monitor initiated a shut 
> down about a second later.  Several times a day.  That, and glancing over at 
> the roadnav screen while in western Iowa, and noted it showing me in downtown 
> Indianapolis IN for 30 seconds just got to be too much.  I moved one of them to 
> the heyu circuit, that gave heyu a tummy ache & it would segfault & die.  I 
> asked Charles on the heyu list & he said I wasn't the only one having trouble 
> with pl2303's, and he was telling folks to go get the FTDI devices as they 
> seemed to Just Work(TM), and they have, very well, as have the Atmel silicon in 
> a pair of extension cables I use.
By intermittent connection problems, do you mean that it would drop 
characters? One problem I have run into is where the flow control 
lines are not implemented. If the hardware and/or application are 
set up to use hardware flow control, this can cause data loss. I 
don't know if this is the case here.


   Do not meddle in the affairs of dragons,
for thou art crunchy and taste good with Ketchup!

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