EAST 裝置是一種利用磁場來約束等離子體的受控熱核聚變物理實驗裝置。分布式定
時觸發系統是EAST 裝置總控系統的重要組成部分之一，用來為各子系統提供精確的觸發時刻和為數據采集系統提供統一的時鐘信號，該系統是以AVR系列單片機atmega128 為核心，基于NUT/OS 嵌入式實時操作系統和FPGA完成了其主要模塊的基本設計，本文給出了該系統的硬件、軟件的設計方案與實現方法。實驗結果表明，該系統使用靈活穩定，符合預定的設計目標。
關鍵詞：TOKAMAK；分布式；以太網；實時操作系統；FPGA
Abstract: EAST Superconductive Tokamak is one kind of physical experiment installation which restrains the plasma using the magnetic field to control thermonuclear fusion. The distributed timing trigger system, which is used to provide precise trigger time to the subsystems and unification clock signals to the data acquisition system, is an important part of the central control system of the EAST Toakamak. This job is centering on atmega128, based on the embedded RTOS NUT/OS and FPGA to complete the basic design of the main system. In this paper, we have given the designing scheme and available method on its hardware and software. Experimental results imply that this system is flexible and stable, conforms to the designing goal prearranged.
Keyword: TOKAMAK; Distributed; Ethernet; RTOS; FPGA