Patent ID: 7533322
Filing Date: 2009-05-12
Classification: G06F

Abstract:
1. A method for rapidly verifying the data integrity of a subsystem operating within a memory space associated with a vehicle-based control system, the method comprising the steps of: initially calculating a subsystem checksum and a global checksum, wherein the subsystem checksum is calculated using a checksum routine based upon data residing in a portion of the memory space associated with the subsystem, and wherein the global checksum is calculated based upon data associated with a substantial totality of the memory space; If the global checksum matches an expected value, storing the subsystem checksum as an expected subsystem checksum and, if the global checksum does not match the expected value, not storing the subsystem checksum as the expected subsystem checksum; and Subsequently verifying that a second subsystem checksum calculated using the checksum routine based upon the data residing in the portion of the memory space associated with the subsystem matches the expected subsystem checksum.