| 摘要 |
PURPOSE:To prevent a malfunction of an automobile-use computer by constituting it so that a state decision is executed before the interrupting inhibition, its processing branches to a malfunction countermeasure routine in case of an inhibited state, it returns to the regular processing routine after the countermeasure has been ended, and the interrupting inhibition is executed. CONSTITUTION:First of all, in a step S1, in a routine which has flowed and come by a regular processing, whether a flag of an interrupting inhibition is set or not is decided. Unless the flag is set, the processing enters into its original interrupting inhibition step S2, and subsequently, in a step 3, the processing in the interrupting inhibition state is executed, and in a step S4, the interrupting inhibition is released. In case it is decided to be the interrupting inhibition state in the step S1, the processing branches to a step S5, and in this step, a prescribed malfunction countermeasure routine is executed, the interrupting inhibition flag is reset to '0', and the processing is returned to an interruptable state. Subsequently, the processing enters into the step 2, therefore, at least before the prearranged interrupting inhibition, the interruptable state is held, therefore, a runaway of a CPU is prevented completely. |
