1394-VXI零槽资源管理器的硬件设计

【作者】 刘刚；

【导师】 陈光（礻禹）；

【作者基本信息】 电子科技大学 ， 测试计量技术及仪器， 2002， 硕士

【摘要】 IEEE1394作为一种高速串行通信标准，不仅可以实现高传输速率，还具有带宽容量高，热插拔和总线动态配置等优点，特别适合于高速计算机外设(如扫描仪、消费类视听设备等)以及军用的实时信息传输(如战地通信，导航等)。 本文将1394总线技术用于VXI总线系统，开发了一种VXI外接式控制机—1394-VXI零槽资源管理器，通过1394接口实现了PC机与VXI仪器模块之间的数据传输，从而提高了VXI测试系统的性能，降低了成本。 1394-VXI转换器是实现IEEE1394总线与VXI总线协议交互的VXI零槽资源管理器模块。从1394-VXI转换器的功能出发，在电子科技大学CAT实验室成功开发GPIB-VXI转换器的基础上，采用MC68030作为系统处理器，VXI总线与本地总线之间的转换通过VXIbus接口控制电路实现；本地总线与1394总线之间的转换通过1394链路层和物理层接口实现；VXIbus地址译码控制电路提供本地存储器映象译码和VXIbus存储器映象译码，并与VXIbus接口控制电路相互配合，共同实现全面的VXIbus主者／从者接口功能；采用CPLD等可编程电路技术，实现了1394-VXI转换器地址译码，以及模块识别、10MHz时钟发生器和TTL触发电路等VXIbus系统所需的仪器公用总线。在1394 OHCI寄存器映射机制和DMA传输机制的基础上，采用1394异步传输方式和公平仲裁协议，以WinDriVeT为开发工具进行1394 OHCI程序开发，实现了1394总线的一系列总线操作功能。 本文详细介绍了1394串行总线和1394开放式主机接口的相关协议，重点讨论了1394-VXI零槽资源管理器的硬件设计和1394 OHCI程序设计。其中硬件设计主要包括VXI接口控制电路、1394接口电路、地址译码控制电路、模块识别电路、TTL触发电路等；1394OHCI程序设计包括总线配置检测、物理层状态传送、异步数据包的发送和接收的实现。本文同时也提出了作者在软硬件调试过程中的一些体会和理解。更多还原

【Abstract】 As a high-speed serial bus specification , IEEE1394 not only realizes high transfer rates , but also has many benefits such as high bandwidth capacity , hot plugging and bus dynamic configuration , especially suits for high-speed computer peripherals such as scanners , and comsumer audio-video electronics , and military real time information transfer field such as strategic communication , navigation .Using IEEE 1394 for VXI control , the paper developed 1394-VXI Slot 0 Resource Manager , data transfer between computer and VXI instrument module is realized by 1394 interface ,’so improved the VXI measure system performance and lowered it’s cost.1394-VXI converter is the Slot 0 Resource Manager module which realizes the interface between IEEE 13 94 bus and VXIbus . According to the function of the 1394-VXI converter , on the base of CAT Lab. UEST’s the successful development of GPIB-VXI converter , the project use MC68030 as system processor , the transfer between VXIbus and local bus is realized by VIC ; the transfer between local bus and 1394bus is realized by 1394 link layer and physical layer ; VAC provides local memory and VXIbus memory mapping decode , and realizes the maste/slave interface fuction of VXIbus with VIC . Address decoding , module identification and TTLtrigger is realized by programmable circuit technology such as CPLD . On the base of 1394 OHCI register mapping and DMA engines , using 1394 asynchronous data transfer and fairness arbitration protocol , 1394bus operation fuction is realized by 1394 OHCI program developed with WinDriver .The paper introduced correlative protocol in IEEE 1394 and 1394 OHCI in detail, and emphatically discussed the hardware design and 1394 OHCI program design of the 1394-VXI converter. The hardware include VXI interface controller circuit ,1394 interface circuit, Address coding circuit, MODID circuit and TTLtrigger circuit etc . 1394 OHCI program realized the test of 1394bus configuration , the status transfer of physical layer , the transmission and reception of 1394 asynchronous packets . And some idea and experience developed by the author in the course of circuit andprogram debugging are discussed .更多还原