Differential data flashing method, system and equipment and storage medium

Abstract

The invention discloses a differential data flashing method, system and device and a storage medium, belongs to the technical field of embedded system software, and solves the technical problems that an existing flashing method is low in efficiency and high in risk. The method comprises the following steps: sending a UDS instruction SID31 to enable the ECU to enter a differential flashing mode; data reading is carried out by sending an SID36 instruction; data writing is carried out by sending an SID34 instruction; after data writing is completed, data verification is carried out; in the data transmission process, the deviation of a data address needs to be accurately calculated so as to ensure correct storage and reading of data; performing data refreshing on the differential data region according to a set refreshing strategy; when the bootstrap program operates the Flash of the differential data area, the data of the DS0 area is automatically backed up; if any refreshing process of the DS0 area is interrupted due to power failure or communication interruption, the lost data are recovered from the data backed up last time after the ECU is powered on again. The data transmission efficiency can be improved, and it is ensured that data can be recovered under the abnormal condition.

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