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Topic: Sharing SD Card Module not a Shield (Read 435 times) previous topic - next topic


I have a project that I created that used an SD Card Module. I have another project that will have it's own Micro Controller. Is it possible for the 2 projects to share the same SD Card Module. If so am I correct that both micro controllers SCK, MISO, & MOSI would all be connected to the same pin, but for the CS pin would does it matter what pin they use say 10, & 4?



If you mean at the same time, then that would mean you have two SPI bus masters, that isn't going to work unless they both agree which of them is going to be the bus master at any given moment.

You might find it's easier to provide a communication mechanism between them and let the one owning the SD card act as a 'file server' for the other.

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