Embedded software testing technology based on all-digital simulation

For the test of real-time embedded system, the integrated all-digital simulation technology was proposed, which can resolve two functional problems in current software testing environment: ①Taking the simulation clock as the time reference, the synchronization due to setting break points was resolved; ② the "dynamic stub" approach was designed to drive the unit-testing for the embedded program that may not be complete, i.e. lack of supporting functions, like library. Furthermore, by significantly reducing judgments in each clock cycle using the lossless compression, the efficiency problem of the simulation platform was resolved, which promotes the practicability of this technology. The integrated simulation technology supports the whole test process from unit test to the integrated test, which strengthens ability of finding software bugs in real-time signal exception processing, improves the efficiency of system-level software testing, and achieves the reuse of test scripts. The platform has been applied to the testing of flight control software.