My experience with Atmel's ATSAM3 family together with ASF (Application
Software Framework) is very positive.
I designed a board with the ATSAM3A8C and an SD-Card slot, then adapted
an example project from ASF. It worked the first try.

The ATSAM3 family has hardware 4-bit MCI interface, which allows for the
highest possible transfer rate, together with the large RAM (128KiB) and
high clock (84MHz) is excellent for your application.
The High-Speed USB interface is another plus for a data-logging equipment.

The RTC code is trivial and you should not worry about.

Isaac


On 14/04/2015 06:40, Matt Rhys-Roberts wrote:
> Hi, please can anyone recommend trusted & reliable C libraries, a) for=20
> general SD file system operations, and b) for a RTC such as the DS1307?
>
> It's to create a kind of datalogger, which must be a fairly well trodden=
=20
> path. However I'm fresh to this particular specialism.
>
> The Arduino datalogger I built all came together quite easily, but I=20
> have to start from scratch with a PIC now. I've thought about porting=20
> the Arduino libraries too, but am not sure of the most efficient way to=20
> develop this yet.
>
> I'm checking through the Microchip official offerings, but am a bit wary=
=20
> after finding their XLCD library in dubious shape and criticised by more=
=20
> experienced developers!
>
> Kind regards,
> Matt.



--=20
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