I have one project. I need to transfer photos from the camera to the PC, I need to use the SDcard interface, which I hope for SPI). Because usb transfer is not an option, so I think that I connect some kind of microcontroller or raspberry pi instead of an sdcard and emulate an SD card, and from the microcontroller I somehow send it (via usb or ethernet) to a PC. all this operation (wrom camera to pc) should be very fast (1-2 seconds), and photos - 2-4 megabytes. Do you have any tips on how to do this or which microcontroller you choose?
circuit:
SPI as SD emulator USB/Ethernet |camera|--------------->|microcontroller| ---------------> |PC|
Thanks for the tips and ideas.
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