| 摘要 |
PROBLEM TO BE SOLVED: To make it possible to estimate, with a simple procedure, a duration of time until a low priority interrupt task is completed, and improve the realtime responsiveness of low priority interrupt processing.SOLUTION: An interrupt control device 100 includes n cause-of-interrupt generation units U1-Un that manage interrupt priorities for each cause of interrupt and generate interrupt signals F1-Fn, and a notification unit 20 that compares the priorities managed by each of the cause-of-interrupt generation units U1-Un and notifies, on the basis of a comparison result, a CPU 200 about an interrupt to be processed preferentially, the cause-of-interrupt generation unit U1 being provided with a priority register 15 for storing interrupt priorities, and an update unit 16A for updating the priorities stored in the priority register 15 so as to be raised by a prescribed level, every prescribed time after a cause of interrupt is generated.SELECTED DRAWING: Figure 1 |
