Hi
This might not be the correct topic but is has to do with SD cards.
I want to share one SD card between 2 cpu s - one a m128 - other a 328 maybe .
The plan is for the mega128 to use the card for date store and so on most of the time
Second cpu will need to control the main pcb and card to put in in a standby state while it access the card - to save a new
flash file for bootloader if required received over GPRS or some other remote communication channel .
I have not tested any of the hardware but I think it should work with a few 4066 or same type of isolators on the spi lines .
The slave cpu will also control main cpu RESET and a " bootloader activation " pin and access to the SD card .
Maybe it is old technology so any new ideas on this setup ?
Cheers
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