I've connected a Micro-SD card to my printerport (using very simple 5v to3v voltage-step-down by three diodes and a resistor, signal step-down by a 1k8, 3k3 resistor combination), and am attempting to read from it.
The problem is that I can't seemto be able to get past the initialisation-process. I can send a CMD0 to the card, and a CMD8 too (multiple times), but whenever I try to enter a CMD1 or ACMD41 (CMD55 followed by a CMD41) loop I can write the commands once, sometimes 5 times and than the card stops responding (does not return any status-byte in about a two seconds). It does however respond to a re-start though (I can than again write a CMD0 and get a response).
I've currently tried numerous things and read about 8 to 12 different documents (apart from a number of PDFs) that have to do with communicating with a MicroSD card, but have not found any indication to what the cause of the above problem might be.
In short : if anyone knows what I should be doing to solve it I would be gratefull.
Regards, Rudy Wieser