Approach to External Events of Real-Time Operating System Based on Polling

The application that polling combines with interrupt to deal with the external events of RTOS, can improve the predictability and real-time of RTOS. The system introduces a polling priority based on the past response times of the external events and their own priority. All the external events are divided into some groupings with the different polling time slice in accordance with the actual needs, and polled according to the polling priority from big to small in each polling time slice, to improve the efficiency of polling. Tests show that this method has greatly been improved in efficiency than traditional polling methods.