MMC Compability problems

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#1
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In a new project we intend to add suport for memory cards (MMC and later also SD) but I can see from other users, which have posted in AVR forum according to the usage of such cards, that MMC cards from different brands may not be fully compatible. I was youst curious to here other freaks experience for such pitfals so these exceptions can be avoided/controlled by some means since we cant control which brand of cards our users would use. Which differences have you guys found out there:?:

Regards
Vidar (Z)

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"The fool wonders, the wise man asks"

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Hi,

I had written code for MMC you can find it on my web site at www.microsyl.com. be aware that if you don't send exactly the good sequance the MMC will jam.....

Yours truly,
Sylvain Bissonnette
www.microsyl.com

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Thanks Sylvian

I will look at your code, but I'll think we will write our own library from scratch, but have your ever found any difference behaviour between different producers of MMC cards?

I know that much information of which features a spesific MMC card suports can be acchieved by reading the CSD registers but is there other consideration that should be taken?

Thanks

Regards
Vidar (Z)

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"The fool wonders, the wise man asks"