Abstract
Concerning the shortages of traditional embedded software updates a new on-site update method with highreliability was proposed which achieved embedded system software updating by copying update files from a SD card to the flash partitions of the embedded device.On condition of fast update the compatibility detection of update files for faultavoidance the double-Bootloader design the test and verification of the update files and the exception handling mechanism were adopted to effectively improve fault-avoidance and fault-tolerance properties of the software.The high reliability of this method is proved through the reliability assessment based on the Nelson model and the application in the product.
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