基于CAN總線的實時DSP應(yīng)用算法

根據(jù)控制局域網(wǎng)絡(luò)(CAN)的特點及應(yīng)用要求，提出一種新的動態(tài)調(diào)度協(xié)議(DSP)，通過動態(tài)選擇時間間隙調(diào)度信息，同時考慮實時
數(shù)據(jù)的重傳機制，并在此基礎(chǔ)上介紹基于CAN 總線的實時DSP 應(yīng)用算法，該算法不僅能滿足CAN 網(wǎng)絡(luò)中實時應(yīng)用系統(tǒng)的性能要求，還
能充分利用CAN 網(wǎng)絡(luò)帶寬。實驗結(jié)果表明，該算法降低了傳輸請求程序的平均信號延遲，同時提高了網(wǎng)絡(luò)利用率。
關(guān)鍵詞：控制局域網(wǎng)絡(luò)；動態(tài)調(diào)度協(xié)議；實時；信號延遲
Algorithm of Real-time DSP Application Based on CAN Bus
JIA Guo-guang1, ZENG Zeng1, LI Ken-li1, YANG Zheng-xin2
(1. School of Computer & Communication, Hunan University, Changsha 410082;
2. College of Mechatronic Engineering & Automation, National University of Defense Technology, Changsha 410073)
【Abstract】According to the characteristics and the corresponding requirements of Controller Area Network(CAN), this paper proposes a novel
Dynamic Scheduling Protocol(DSP), which dynamically selects the time slots of CAN bus for the real-life applications, and considers the
mechanism to re-transmit real-time data. On basis of this, an algorithm of real-time DSP application based on CAN bus is introduced, which not only
meets the real-time requirements of CAN applications, but also explores the bandwidth of CAN. Experimental results show this algorithm reduces
the average response delay of the applications and improves the bandwidth utility of CAN networks.
【Key words】Controller Area Network(CAN); Dynamic Scheduling Protocol(DSP); real-time; signaling delay