DEVICE AND METHOD FOR CONTROLLING JOG DIAL IN REAL-TIME SYSTEM - THE DEVICE RECEIVE/PROCESS INTERRUPT SIGNALS AT CERTAIN INTERVALS WITHOUT RECEIVING/PROCESSING ALL INTERRUPT SIGNALS GENERATED WHEN A JOG DIAL ROTATES AT HIGH SPEED

摘要

PURPOSE: A device for controlling a jog dial in a real-time system is provided to prevent a system from being overloaded when processing many interrupt signals generated by the high-speed rotation of a jog dial. CONSTITUTION: A jog dial(100) has a plurality of interrupts. A jog signal generator(110) generates a rotation start signal when the jog dial(100) starts rotating, and generates a interrupt signal when the jog dial(100) reaches an interrupt position. A timer(120) is driven by the rotation start signal, and delivers a driving time value according to the interrupt signal. The second buffer register(122b) stores a reaction time reference value for determining whether to process the interrupt signal. A switching portion(130) delivers or cuts off the interrupt signal received from the jog signal generator(110). A control block(140) compares the time value with the reaction time reference value to control the on/off operation of the switching portion(130), and generates a control signal in accordance with the interrupt signal received through the switching portion(130) which is in the on-state.