In the implementation, we used the multiprocessing method in QNX to analyze the generalflowchart of system, and divided the realization of dual downstream channel into three modules.
While general program are based on prior used to write, and flowchart, flow charts, also includes results of design requirements, so, flow charts, design directly affect the source program design.
This paper also introduces concept of state flow-chart and general methods on judging the integrality of a control system, then expounds the methods by combining the simulated model.