From: Chris Kuethe <chris.kuethe@gmail.com>
To: Dave Taht <dave.taht@gmail.com>
Cc: thumbgps-devel@lists.bufferbloat.net
Subject: Re: [Thumbgps-devel] Build vs. modify vs. what should we be doing anyway?
Date: Mon, 12 Mar 2012 19:53:30 -0700 [thread overview]
Message-ID: <CAGHP0pJXSfJzzKFSEA_zkwv0y608KW=8XCAmp0Sg-6HemireoQ@mail.gmail.com> (raw)
In-Reply-To: <CAA93jw6bvfm5ofvrdsSOzPL-PiE-qJLpWpeOcKFo9p=pRd0wsA@mail.gmail.com>
On Mon, Mar 12, 2012 at 19:40, Dave Taht <dave.taht@gmail.com> wrote:
> On Mon, Mar 12, 2012 at 7:13 PM, Eric S. Raymond <esr@thyrsus.com> wrote:
>> Chris Kuethe <chris.kuethe@gmail.com>:
>>> ublox antaris4 (and probably everything newer) has on-die usb and
>>> implements the abstract modem class. but 1PPS isn't transmitted over
>>> usb.
>>
>> Annoyingly, it probably could be. That modem model pretty much has to have
>> DCD and RI events.
Well, serial is great for implementing in small/uncomplicated/cheap
hardware... I guess if you're TSMC or Atmel you can cram in a hardware
controller. And Atmel did joint work with ublox to produce the
antaris.
As for tiny USB stacks, at least LUFA and V-USB come to mind. I think
you can fit a software implementation into 4K.
I don't know of any I2C/SPI GPS. If you can point me at some good ones
I'd appreciate it, because I was thinking I'd have to build some glue
logic to do that for another project of mine.
AT90USB162 are $3.71 for single pieces from digikey. Or about $20 if
you want a nicely fabricated board like the "teensy".
> Perhaps simply a real usb microcontroller with spi or i2c then driving
> usb-2.0 for real...
>
> http://www.linux-usb.org/ezusb/ - 16 bucks and WAY too many pins...
> but it should be possible to do much better than that after looking
> harder.
>
> I've also always got a kick out of the propeller chip...
>
> http://www.parallax.com/Store/Microcontrollers/PropellerChips/tabid/142/CategoryID/18/List/0/Level/a/ProductID/411/Default.aspx?SortField=ProductName%2cProductName
>
> Atmel's AVRs are also of interest...
>
> http://www.olimex.com/dev/avr-usb-162.html
>
> http://www.atmel.com/devices/at90usb162.aspx
>
>> --
>> <a href="http://www.catb.org/~esr/">Eric S. Raymond</a>
>
>
>
> --
> Dave Täht
> SKYPE: davetaht
> US Tel: 1-239-829-5608
> http://www.bufferbloat.net
--
GDB has a 'break' feature; why doesn't it have 'fix' too?
next prev parent reply other threads:[~2012-03-13 2:53 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-03-10 18:02 Patrick Maupin
2012-03-12 21:03 ` Eric S. Raymond
2012-03-12 21:18 ` tz
2012-03-12 21:26 ` Eric S. Raymond
2012-03-12 21:28 ` Patrick Maupin
2012-03-12 21:39 ` Eric S. Raymond
2012-03-12 22:10 ` Patrick Maupin
2012-03-12 22:23 ` tz
2012-03-12 22:33 ` Patrick Maupin
2012-03-13 2:29 ` Ron Frazier (NTP)
2012-03-13 2:39 ` Chris Kuethe
2012-03-12 22:45 ` Eric S. Raymond
2012-03-12 23:01 ` Dave Taht
2012-03-13 1:43 ` Eric S. Raymond
2012-03-13 2:04 ` Chris Kuethe
2012-03-13 2:13 ` Eric S. Raymond
2012-03-13 2:40 ` Dave Taht
2012-03-13 2:53 ` Chris Kuethe [this message]
2012-03-13 4:54 ` Eric S. Raymond
2012-03-13 13:23 ` Dave Taht
2012-03-13 14:35 ` tz
2012-03-13 16:04 ` Eric S. Raymond
2012-03-13 16:22 ` tz
2012-03-13 2:38 ` Ron Frazier (NTP)
2012-03-13 2:42 ` Chris Kuethe
2012-03-13 3:00 ` Ron Frazier (NTP)
2012-03-13 3:04 ` Dave Taht
2012-03-13 3:06 ` Chris Kuethe
2012-03-13 3:16 ` Dave Taht
2012-03-13 3:31 ` Chris Kuethe
2012-03-13 4:49 ` Dave Taht
2012-03-13 4:55 ` Eric S. Raymond
2012-03-13 4:16 ` Eric S. Raymond
2012-03-12 21:40 ` tz
2012-03-12 21:27 ` Patrick Maupin
2012-03-12 21:22 ` Patrick Maupin
2012-03-12 21:37 ` Eric S. Raymond
2012-03-12 21:45 ` Patrick Maupin
2012-03-12 22:02 ` Eric S. Raymond
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