Bootloader from SDCard

Question

Hi, 
 I need to add to my project that uses NRF5340 a bootloader that reads new firmware from SDCard. Is there an example where I can find information? Someone has just encountered this kind of issue and can tell me some tips? 
 Thanks 
 Marco

Vidar Berg · Answer

Hi, 
 Provided you have enough internal flash, I think the easiest approach might be to have the application load the binary image from your SD card into the MCUBoot's secondary slot (Ref., Image slots , Disc access ), then let MCUBoot activate the update on the following reboot by moving the update image from the secondary to the primary slot. Another alternative may be to modify MCUBoot to support serial recovery from an SD card (serial recovery is currently supported through USB/UART). 
 Best regards, 
 Vidar

Bootloader from SDCard

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