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CRC calculations for MMC card

Hi,

I am developing an MMC driver using SPI mode. The driver is already working with CRC checking disabled (default). I would like to use or at least support (through a configuration option) the generation and checking of CRCs.

I found in an application note from Sharp (for LH79520) two C functions for calculating the CRC7 and CRC16 needed by the protocol. The CRC7 function seems to be working but the CRC16 is not.

Does anyone have a link to or the source code for an MMC CRC16 calculation function in C ?

Thanks, Claudio

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clas333
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