Interfacing a Serial, External MicroSD Card Adapter with RaspberryPi.
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Here, in this Video i have shown, how to interface an External SDCard Adapter with RaspberryPi, and then communicate using GPIO pins for SPI Bit Banging, with this Serial SDCard Adapter. Elm Chan's FATFS Filesystem Module was used, which provided a generic interface code, which was developed and designed to work with RaspberryPi Platform. The Kernel is 3.18, and the setup is 2015-02-16-raspbian-wheezy installation.The BCM2835 Library by Mike was used for performing GPIO Access. Rest, things are mentioned in more detail in my Blog Page:
http://blogsmayan.blogspot.in/p/interfacing-sd-card.html