Method and apparatus for fault tolerant FOTA update with single backup block write

摘要

A method for recovering from an interruption during a Firmware Over-The-Air (FOTA) update is provided. The method includes identifying a missing block of a plurality of blocks to be updated in the first memory, the missing block corresponding to a block being updated when the interruption occurred, copying a backup block into a backup buffer, simulating an application of the FOTA update in a second memory, the simulation including, for each block of the plurality of blocks to be updated, performing a reversible operation on the contents of the backup buffer and an updated block, and updating the backup buffer with the operation result, replacing the missing block with the updated backup buffer, and resuming the FOTA update.

主权项

1. A method for generating a backup block for recovering from an interruption in a Firmware Over-The-Air (FOTA) update, the method comprising:
initializing a backup buffer; simulating an application of the FOTA update to blocks in a volatile memory, the simulating of the application including:
for each block in the volatile memory to be updated, updating the block according to the FOTA update, performing a reversible operation on the updated block and the backup buffer, and updating the backup buffer with the result of the reversible operation; and writing the updated backup buffer to a backup block.