| 摘要 |
<P>PROBLEM TO BE SOLVED: To secure without overhead, when a function that requires periodic resetting and a function that does not are to be operated on the same CPU, the operational continuity of the function that does not require periodic resetting. <P>SOLUTION: A resetting device 102 outputs a pre-reset signal to a boot strap 203 earlier by a certain length of time than periodic resetting and, except in a processor state regarding an RTOS 204 in which the boot strap 203 requires no periodic resetting, saves the timer count of an OS timer into a RAM 104. In a clock tick number storing region, the number of clock ticks outputted from a clock transmitting device 103 during the period from the saving and restoration regarding the RTOS is stored, and the boot strap 203 calculates and restores, at the time of RTOS restoration, the OS timer count by using the timer count saved in the RAM and the number of clock ticks in the clock tick number storing region, thereby to secure the operational continuity of the RTOS without overhead and without using a H/W timer. <P>COPYRIGHT: (C)2012,JPO&INPIT |
