Design of High Precision Timer Based on Advanced Programmable Interrupt Controller
2014; East China Computer Technology Research Institute; Linguagem: Inglês
ISSN
1000-3428
Autores Tópico(s)Advanced Sensor and Control Systems
ResumoTimer with a certain precision is often required in the process of developing the system. In the Windows real time extending process,aiming at the problem of insufficient original timing accuracy and the fluctuation problem,this paper presents a high precision timer based on local Advanced Programmable Interrupt Controller(APIC). Making use of the counting register programs CPU sheet structure of APIC,it constructs high precision clock effectively,and uses the kernel driver construction scheduling management,memory mapping to improve data transmission speed of user state to guarantee real-time kernel to provide real-time. DLL provides a set of interface for users. Experimental results show that the scheme can effectively solve the problem of timing precision,and it has good usability.
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