[ELDK] MMC-SPI on mpc8280

[Detlev Zundel]

Hi Suja Baburaj,

> I have a custom board similar to PQ2FADS(eldk4.1) with SD Adaptor
> connected to CPM-SPI.
>
> Is it necessary/mandatory to have pull-up resistor on SPI signal(s) in MPC8280
> CPM-SPI, if i have only one master one slave in the board?
>
> I have initialised my SD card at 400KHz and VFAT partition mounted, but if i
> try using higher spi clock (>700KHz )for single/multiple block read/write, the
> transfer hangs at random no of blocks.
> It hangs precisely after spi_async and wait_for_completion.
>
> Can somebody comment on this.

Well, my comment is that this question really has no connection to the
ELDK, so this mailing list is not the right place for this question.

Apart from that the best advise I have is to hook up an oscilloscope
(with memory) and look at what's happening on the bus at the time of the
error.


Cheers
  Detlev

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