[Thumbgps-devel] in search of a better microcontroller

[Patrick Maupin]

I like the LPC3131.  It has enough internal memory to run Nuttx as
well.  The only problem is it's hard to prototype because it's BGA
only.  But Olimex has a cheap dev board.

Pat

On Mon, Mar 26, 2012 at 7:53 PM, Dave Taht <dave.taht at gmail.com> wrote:
> Since 'plain jane' is coming along nicely, I've been amusing myself with
> what it would take to do 'sexy sadie'
> (not my final choice for a name btw!)
>
> I wanted to combine at least two functions into the usb stick, they would
> be:
>
> * gps/time with supercap backup
> * other sensor support (wind cups, precipitation, barometer, etc)
> * some sort of direct output signal (can bus? spi bus? don't know yet)
> * randomness/entropy generator
>
> While my initial choice for the former two features would be the ublox
> device already discussed, I haven't pursued the possibility of being able to
> modify their firmware to do what I want. I should contact them I guess...
> but I'm wagering that gaining access to that firmware will be difficult, so
> interfacing with a cheaper gps device (e.g plaine jane) and adding a
> microcontroller to it seems like the best option.
>
> The problem is I'd like to find something capable of 480Mbit transfers.
>
> The first microcontroller I picked (the atmel) seems to be near end of life
> and only does 12Mbit, so I went looking for the sexy and new (a lot of
> those!), and stumbled across this one:
>
> http://media.freescale.com/phoenix.zhtml?c=196520&p=irol-newsArticle_print&ID=1671968&highlight=
>
> I couldn't help but laugh when I saw:
>
> "Linear 4 GB address space that removes the need for paging, reducing
> software complexity and ensuring a more 8-bit-like user experience"
>
> Yea, that 8 bit-like user experience. That's what I want in a 32 bit 4GB
> capable architecture.
>
> The last phrase was removed from the official site later, after whoever
> wrote the pr release came down off of whatever he/she was smoking.
>
> http://www.freescale.com/webapp/sps/site/overview.jsp?code=KINETIS_L_SERIES&tid=van%20LSERIES
>
> This chip is WAY too new to consider using, but it is a sign of things to
> come. Still trying to find a sane 480Mbit USB interface that's under 10
> bucks...
>
> --
> Dave Täht
> SKYPE: davetaht
> US Tel: 1-239-829-5608
> http://www.bufferbloat.net
>
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