Pyboard Won't Recognize Healthy SD Card

[tomrogue]

Hey There,

So I am trying to boot the pyboard from an SD card with no luck.
The SD Card is a 16GB Class 10 Sony SDHC and I am running the most current firmware for the pyboard (pybv10-2015-12-16-v1.5.1-120-g130fde8.dfu). The SD card is formatted properly and has no sector/cluster issues.
The card is easily read by every PC I have tested it with and I have tried booting from the card in HID and MSC modes.
I have also confirmed that the pyboard itself is not ever seeing the SD card by running:

Code: Select all

>>>import sys
>>> sys.path

and only ever receiving:

Code: Select all

['', '/flash', '/flash/lib']

I have yet to try the board with different SD cards however. I was wondering if anyone has any recommendations regarding what type of SD cards work best with the pyboard in terms of Class, memory size, HC/XC and manufacturer.

Thanks so much for your help!

[dhylands]

I just happened to purchase some 8Gb and 16Gb Kingston class 10 HC U1 cards.

The 8 Gb one seems to work fine. The 16 Gb sort of works, but with USB Mass Storage enabled my USB Serial link goes down after a short period of time.

With USB Mass Storage disabled, it seems to work fine (i.e. I can copy files into and out of the sdcard using rshell.py with no issues).

Both cards showed up in sys.path.

So I'd definitely try with a smaller card and see if that helps. I believe that card bigger than 2Gb use a slighly different protocol that the smaller card.

If nothing works at all, then you may have a bad sdcard connector on your board (or a cold solder joint or something).

[JonHylands]

I've been using a Kingston 16 GB Class 10 HC U1 uSD card in Roz for quite a while now. Note that I use rshell.py to manage it, so I have USB Mass Storage disabled.

Zero issues so far.

This is a picture of the card I'm using: https://app.box.com/s/cu9dgw45v0l7e1ni32chpieplh6hkqit

This is what I get:

>>> import sys
>>> sys.path
['', '/flash', '/flash/lib', '/sd', '/sd/lib', '/sd/bioloid3']

[tomrogue]

Thanks for the tips guys!

I'll try using rshell.py and smaller sd cards (they're kinda hard to come across these days though). Hopefully that'll do the trick.

[dhylands]

Also, are you running recent firmware?

I know that there were issues with larger sdcards from a quite a while ago. I've added a todo item to my list to see why the 16 Gb card is acting up with USB Mass Storage.

The fact that you don't see /sd in your sys.path suggests that you're running into a slightly different problem.