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Problem write to the SDcard

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cyril18

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hello,

I am having problems with writing a block of 512 bytes data to the SDHC card with an FPGA.

I succed to write/read datas to others SDcard (SDSC/SDXC) but not with SDHC card.
Firstly, after initialization, the DAT0 line go to '0'. I guess it's not normal regarding the datasheet (The DAT bus line level is high by the pull-up when no data is transmitted).
After sent a block to the SDcard, the DAT0 go to '0' (busy) and to '1' (end of write), so it seems good but I can't read the datas that i wrote before.
Moreover, I have a timer to get the write block time and with this card, it's really fast so I think the card doesn't write datas that I sent.

Thanks,

---------- Post added at 11:33 ---------- Previous post was at 09:36 ----------

help please ;)
 

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