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Altera_Forum's avatar
Altera_Forum
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15 years ago

mmc/sd problem

Hi all, I have generated a uclinux kernel for my custom board. The SD card driver is bast on SPI bus, with 20MHz bus clock. (According to http://www.alterawiki.com/wiki/mmcsd). I can ope...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

Supposedly the driver is not notified by the hardware that the card has been unpowered and needs re-initialization. e.g. the NEEK lacks the appropriate hardware for this. I suppose a dedicated i/O is necessary on that behalf.

When playing with the SD-Card I needed to unload and re-load the driver to re-initialize a re-inserted card.

-Michael