2011/11/20 mattschinkel <[email protected]>

> I believe the response from the init procedure can tell if the SD card
> is ok or not. I can just set a error variable. I still wonder what
> response you get from your SDHC.
>

Setting a global variable would be nice, it would allow to report it a
client level, with dealing with serial print (or whatever) within the lib.

I'll report about SDHC asap (for now my bee is back at work, monitoring my
electrical consumption :))


>
> The table you suggest would be simple so far.... all standard capacity
> are ok, high capacity are not.
>

well it appears it's not that simple. For instance, Trev has troubles with
a standard capacity card from Kingston brand. Sandisk appears to work
better.


Cheers,
Seb




> Matt.
>
> On Nov 20, 4:31 am, Sebastien Lelong <[email protected]>
> wrote:
> > héhé... I was very tired with this wired thing, weird wired thing :)
> >
> > I'm thinking about a test SD card which would just expose its connections
> > outside, so I could check them...
> >
> > Cheers,
> > Seb
> >
> > 2011/11/20 Oliver Seitz <[email protected]>
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > > Hihi... So the error wasn't as weird at all, but rather wired ;-)
> >
> > > Greets,
> > > Kiste
> >
> > > --- Sebastien Lelong *<[email protected]>* schrieb am *So,
> > > 20.11.2011:
> >
> > > Von: Sebastien Lelong <[email protected]>
> > > Betreff: Re: [jallib] Re: r2834 committed - moved MSD out of casulties.
> > > added storage drivers (aliases) file. hard...
> > > An: [email protected]
> > > Datum: Sonntag, 20. November, 2011 10:20 Uhr
> >
> > > Hi Matt,
> >
> > > Issue closed... Here how:
> > > - I checked all SPI pins, blinking a LED, everything's working
> > > - I then removed my 12K pullup on SS pin. PIC can move out of writing
> mode
> > > (it was previously stuck before stop_writing).
> > > - tests reveal inconsistent behavior, sometimes it gets stucks,
> sometimes
> > > not.
> > > - when I push the side of the card to force connection, reading works,
> > > though not consistent (value is sometime the expected one, sometimes
> not)
> > > - well, something is wrong about the connector. I soldered again the
> pins,
> > > just melting the solder again, replug the card,and... and ?... and
> .??? it
> > > works :)
> > > - soldered again my pullup => OK
> >
> > > So.... it seems my micro Sd socket was the faulty one, I guess the many
> > > push/pull get rid of connections. Lesson learned. I guess.
> >
> > > Tried the SDHC, not success btw.
> >
> > >  What was interesting here in all of this is the potential report we
> can
> > > have running your procedure. It can definitely help tracking hardware
> > > problem, and maybe most importantly, tracking which SD card are
> supported.
> > > Do you think you could build a table of supported SD card, showing
> results
> > > from a reporting sample ?
> >
> > > Thanks
> > > Seb
> >
> > > 2011/11/17 mattschinkel <[email protected]<
> http://mc/[email protected]>
> >
> > > As soon as you told me about a bunch of 0xFFFFFFFF.... I had a feeling
> > > it was your hardware, which is why I asked.
> >
> > > It didn't make any sense that you would get 0xFF and I get 0x00 on
> > > your new high capacity.
> >
> > > In past experiences getting only 0xFF on SPI means hardware trouble.
> > > Don't take my word for it though.
> >
> > > So hopefully you can try out MSD now. You should be able to just
> > > replace the device block.
> >
> > > In any case, we both seem to have the same issues with SDHC cards. We
> > > both get 0x0000000000. Do you get any response at the end of the init
> > > proc as suggested previously?
> >
> > > Matt.
> >
> > > On Nov 17, 1:44 am, Sebastien Lelong <[email protected]<
> http://mc/[email protected]>
> >
> > > wrote:
> > > > Hi Matt,
> >
> > > > Ok this is weird...
> >
> > > > I got 0000000000 on my std capacity card. And FFFFFF00 on my high
> > > capacity
> > > > card on the first call, then 0000000000 on other calls (it was in a
> > > forever
> > > > loop btw). More weird, when I switch off/on the PIC, I now only
> > > > have 0000000000, even on first call...
> >
> > > > Now, on another PIC. Using my very first Bee, not the exact same
> > > hardware,
> > > > but I wrote minix libs on this one, so I know it's working. SDHC
> (4GB):
> > > > 0000000000. Std cap (1GB): 08FFFFFFFF. Mmmh.... This one seems to
> work ?
> > > I
> > > > tried my known-to-work sample, and... it works ! SDHC won't, but
> that's
> > > > another issue.
> >
> > > > So... something is wrong on my hardware on my last bee, something
> that
> > > has
> > > > changed since it used to work. I'll try SPI pins asap.
> >
> > > > At least, we seem to have few procs in order to test if SD card is
> > > > supported or not, right ?
> >
> > > > thanks again !
> > > > Seb
> >
> > > > 2011/11/16 mattschinkel <[email protected]<
> http://mc/[email protected]>
> >
> > > > > ok, here's another one to try (after init like the others)... You
> > > > > should get 04FFFFFFFF on your standard capacity card. Bit 2 of the
> > > > > first byte should be set as it is on mine 0b00000100.
> >
> > > > > High capacity cards should return something else, although 2 high
> > > > > capacity cards I have tried are not giving me what I am expecting.
> I
> > > > > get 0000000000 on my high capacity, but should get something like
> > > > > 010001AA00
> >
> > > > > procedure sd_read_if_cond() is
> > > > >    sd_chip_select = low   -- enable the sd card
> >
> > > > >   var byte response
> > > > >    send_command(SD_SEND_IF_COND, 0x1AA, response)
> > > > >   print_byte_hex(serial_data,response)
> >
> > > > >   print_byte_hex(serial_data,spi_master)        -- Get a responce
> > > > > from the card after each command
> > > > >   print_byte_hex(serial_data,spi_master)        -- Get a responce
> > > > > from the card after each command
> > > > >   print_byte_hex(serial_data,spi_master)        -- Get a responce
> > > > > from the card after each command
> > > > >   print_byte_hex(serial_data,spi_master)        -- Get a responce
> > > > > from the card after each command
> >
> > > > >   spi_master = 0xFF            -- send 8 clock pulses
> >
> > > > >   sd_chip_select = high   -- enable the sd card
> > > > > end procedure
> >
> > > > > sd_read_if_cond()
> >
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-- 
Sébastien Lelong

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