Link layer controller of IEEE1394 bus

Abstract

The invention relates to a link layer controller of an IEEE1394 bus, which comprises a host computer interface, a link layer core module, a data buffering and routing control module, a high-speed data interface module and a configuration register, wherein an external CPU (central processing unit) can read and write data buffering areas in the configuration register and the access data buffering and routing control module by the host computer interface; the data buffering and routing control module is positioned among the link layer core module and the host computer interface and a high-speed data interface, used for providing the switching control among different data receiving and sending channels and also provided with two asynchronous first-in first-out memories which are respectively used for the buffering of receiving and sending data and the synchronization of cross-clock domain data; and the configuration register is used for providing initial configuration and control for the link layer core module and the data buffering and routing control module and controlling and acquiring the working states of all modules of the link layer controller by the host computer interface reading and writing configuration register, and has good portability.

Description

technical field [0001] The invention relates to the design of a computer standard serial bus—IEEE1394 bus protocol controller, in particular to a link layer controller of the IEEE1394 bus used in the field of space electronics technology. Background technique [0002] In electronic systems, in order to simplify hardware circuit design and optimize system structure, a group of lines is commonly used, configured with appropriate interface circuits, and connected to various components and peripheral devices. This group of shared connection lines is called a bus. Adopting the bus structure facilitates the expansion of components and equipment, especially the unified bus standard is formulated, which makes it easier to realize the interconnection between different equipment. Advanced bus technology has a very important impact on improving the performance of electronic systems. [0003] In the early spacecraft, the bus structure was not used. The communication between the compute...

AI Technical Summary

Problems solved by technology

Realized by using high-grade FPGA devices, or after tape-out of ASIC with radiation-resistant technology, the controller can be used in aerospace electronic equipment, solving the problem that aerospace-grade devices of IEEE1394 bus are not easy to obtain

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