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From: mpm on 13 Apr 2010 15:49
On Apr 13, 1:58 pm, Silvar Beitel <silverbee...(a)net1plus.com> wrote:
> On Apr 13, 5:41 am, Richard Rasker <spamt...(a)linetec.nl> wrote:
>
> > - It would appear that I need a license from the SD Card Association if I
> > want to build (and sell) anything containing an SD card host circuit (seehttp://www.sdcard.org/developers/join/licensing/"Host and Ancillary
> > Products").
>
> IIRC, using an SD card in SPI (single-bit serial MMC-like) mode does
> not require a license.  Only the 4-bit interface does.
>
> Many PICs come with SPI controllers.  The Microchip website has C code
> for using an SD card as a USB bulk storage device - you can scarf the
> SD control/read/write code from that.
>
> --
> Silvar Beitel

I agree.
This is my recollection as well on the last product we had that
considered the use of SD Cards.
The SPI mode did not require licensing or registration with SanDisk
(or whomever).

In our project, we ended up using CompactFlash, which was trivial to
implement.

The physical size difference between an SD Card and a CF Card doesn't
seem like it would matter for this application.
However, an SD Card might be the better choice from a vibration
perspective as SD holders usually have a retention mechanism that CF
holders do not.
You wouldn't want the memory card falling out (vibrating out) during
operation of the heavy machinery.

Someone else mentioned an EEPROM / Serial Comm port solution.
This approach would also be cheap and easy, and quick to code/program.
I'm just wondering if there's an easy (easier) way to transport
(collect) the serial stream from equipment out in the field.
Obviously a laptop, or netbook..., but anything else? Seems like that
would have been beat to death by now. (?)

-mpm
From: SilverLeo on 13 Apr 2010 15:56
Il Tue, 13 Apr 2010 11:41:32 +0200, Richard Rasker ha scritto:

> Hello,
> ...
> The only problem I'm still facing is data storage: I'd like to use an SD
> card (or Micro SD) to store this data, so that the user can transfer the
> data to a PC with minimal hassle.

Take a look at this:
http://elm-chan.org/docs/mmc/mmc_e.html

If you need a good FAT library:
http://elm-chan.org/fsw/ff/00index_e.html

From: Jan Panteltje on 13 Apr 2010 17:11
On a sunny day (Tue, 13 Apr 2010 12:49:29 -0700 (PDT)) it happened mpm
<mpmillard(a)aol.com> wrote in
<34b89a39-d2d5-455f-bf25-356e6cfd9424(a)g30g2000yqc.googlegroups.com>:

>Someone else mentioned an EEPROM / Serial Comm port solution.
>This approach would also be cheap and easy, and quick to code/program.
>I'm just wondering if there's an easy (easier) way to transport
>(collect) the serial stream from equipment out in the field.
>Obviously a laptop, or netbook..., but anything else? Seems like that
>would have been beat to death by now. (?)
>
>-mpm

It is called ethernet - internet.
Implement an ethernet port.
And then you do not have to go there.
From: mpm on 13 Apr 2010 21:46
On Apr 13, 4:11 pm, Jan Panteltje <pNaonStpealm...(a)yahoo.com> wrote:
> On a sunny day (Tue, 13 Apr 2010 12:49:29 -0700 (PDT)) it happened mpm
> <mpmill...(a)aol.com> wrote in
> <34b89a39-d2d5-455f-bf25-356e6cfd9...(a)g30g2000yqc.googlegroups.com>:
>
> >Someone else mentioned an EEPROM / Serial Comm port solution.
> >This approach would also be cheap and easy, and quick to code/program.
> >I'm just wondering if there's an easy (easier) way to transport
> >(collect) the serial stream from equipment out in the field.
> >Obviously a laptop, or netbook..., but anything else?  Seems like that
> >would have been beat to death by now. (?)
>
> >-mpm
>
> It is called ethernet - internet.
> Implement an ethernet port.
> And then you do not have to go there.

I'm picture-ing a backhoe out in the mud.
Are you suggesting an Ethernet connection on the data acquisition
device mounted in the backhoe?
To me, that seems like a worse idea than the serial port.

It also just occured to me that I don't know how to spell "picture-
ing" :)

-mpm
From: D Yuniskis on 14 Apr 2010 00:25
mpm wrote:
> On Apr 13, 4:11 pm, Jan Panteltje <pNaonStpealm...(a)yahoo.com> wrote:
>> On a sunny day (Tue, 13 Apr 2010 12:49:29 -0700 (PDT)) it happened mpm
>> <mpmill...(a)aol.com> wrote in
>> <34b89a39-d2d5-455f-bf25-356e6cfd9...(a)g30g2000yqc.googlegroups.com>:
>>
>>> Someone else mentioned an EEPROM / Serial Comm port solution.
>>> This approach would also be cheap and easy, and quick to code/program.
>>> I'm just wondering if there's an easy (easier) way to transport
>>> (collect) the serial stream from equipment out in the field.
>>> Obviously a laptop, or netbook..., but anything else? Seems like that
>>> would have been beat to death by now. (?)
>>> -mpm
>> It is called ethernet - internet.
>> Implement an ethernet port.
>> And then you do not have to go there.
>
> I'm picture-ing a backhoe out in the mud.
> Are you suggesting an Ethernet connection on the data acquisition
> device mounted in the backhoe?
> To me, that seems like a worse idea than the serial port.
>
> It also just occured to me that I don't know how to spell "picture-
> ing" :)

Use a wireless interface. Depending on bandwidth, could be
something as "slow" as low end zigbee. You can also buy
radio modems in the 400MHz band.
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