Micro-SD slot on the Maple Native?

LeafLabs Garden » Community » The Lounge

Micro-SD slot on the Maple Native?

(16 posts) (8 voices)

Started 4 years ago by mbk
Latest reply from Zerkof

12 Next »

mbk
Member

Hello guys,

I just received my Maple Native today, it looks great!

To my surprice it looks like there is a Micro-SD slot on the Maple Native?
I have been reading the docs for the Maple Native:
http://leaflabs.com/docs/hardware/maple-native-beta.html

But no where does it state anythin about an Micro-SD slot?

So? Is it a Micro-SD slot? Does it work? How do I get to work?

Again, the Maple Native looks great, thanks for developing it!

Sincerely
MBK

Posted 4 years ago #
mbk
Member

BTW, thanks for the candy :)

Posted 4 years ago #
mbolivar
LeafLabs

Hi MBK,

It is a micro-SD slot. However, libmaple doesn't support the SDIO peripheral yet, which is why we aren't publicizing that feature too much. For now, you can try using ST's firmware library. Let us know how it goes, and we're glad you liked the candy!

Posted 4 years ago #
mbk
Member

Hi mbolivar,

Thanks for your answer.
Right now getting SD card to work is out of my scope, was just curious. So this means that at some point it will work with libmaple?

sincerely
MBK

Posted 4 years ago #
poslathian
LeafLabs

thats the plan.

Posted 4 years ago #
robertcook
Member

Hi - I'm been using the SDFat library on a standard Maple I'm switching to the Maple Native as I need 3 SPI channels.

I assume that this built-in SD card is connected to one of the three SPI channels? And is there a reason that SDFat shouldn't work with it?

Posted 4 years ago #
robertcook
Member

OK, so looking at the schematics, it appears that "SD/SD1" does not use any of the SPI ports, but, rather, 4 dedicated GPIOs for data. Is this design expected to perform better than the SPI+DMA approach described elsewhere in the forum?

Posted 4 years ago #
robodude666
Member

robertcook,

The uSD card slot is connected to the hardware SDIO peripheral, which should yield higher performance than SPI. However, libmaple does not currently support the SDIO functionality of the STM32.

If you wish to use SDIO, check out RM0008 for more information. I'm sure official support will be included in the future, but currently the leafinites are busy with other things it seems.

-robodude666

Posted 4 years ago #
robertcook
Member

Thanks. I'll dive into the manual.

Posted 4 years ago #
gbulmer
Moderator

Be a little cautious about SDIO - I've been reading some of the SD documents, and some details are removed from the free documents. I do not know for sure, but it might be that you need to buy a membership to the SD organisation to get all the documents you need.

Posted 4 years ago #
mbolivar
LeafLabs

I do not know for sure, but it might be that you need to buy a membership to the SD organisation to get all the documents you need.

Ugh. Ain't life grand.

Posted 4 years ago #
robertcook
Member

Ah, the medieval guild system is alive and well.

Posted 4 years ago #
gbulmer
Moderator

Folks - please don't take my comment as validated and accurate,
I have failed to find things in one of the free SD standards documents, and it said I needed the 'non-free version'. Then I couldn't find similar stuff in the SDIO document, but I haven't bottomed out whether that is also only available in the 'non-free' version.
BUT, they do seem to differentiate between the free-public versions and the membership versions of standard documents.

One of the areas I have had real problems finding is switching an SD card from the SPI mode into 4 data-bits, faster modes. So if someone does find instructions, I will be a very happy chappie :-)

Posted 4 years ago #
ianmga
Member

I have it working under a different RTOS (I didn't write the code, mind you) and the STM32 reference manual should have enough info...

Posted 4 years ago #
gbulmer
Moderator

ianmga - Just to be clear, does the code use the 4-bit wide data interface on the micro-SD card, or does it use the SPI mode?
http://www.interfacebus.com/MicroSD_Card_Pinout.html

If it does use the 4-bit data mode, can you give a link to the code? Is the code Open Source?

Posted 4 years ago #

RSS feed for this topic

12 Next »

Reply »

You must log in to post.