1394 bus transaction layer-link layer data packet transmitting circuit and method

Abstract

The invention relates to a 1394 bus transaction layer-link layer data packet transmitting circuit and method. The circuit comprises an asynchronous transmission data cache region management module, an asynchronous transmission scheduling control module, an asynchronous transmission FIFO cache management module, an isochronous transmission data cache region management module, an isochronous transmission data scheduling control module, an isochronous transmission FIFO cache management module and a control and register management module. According to the 1394 bus transaction layer-link layer data packet transmitting circuit and method, transmission data cache regions are automatically managed, and whether errors occur on data packets in a transmission data channel can be monitored in real time, and asynchronous and isochronous transmission of communication data can be compatible. With the 1394 bus transaction layer-link layer data packet transmitting circuit and method adopted, the technical problem of data loss and instability of 1394 bus serial communication can be solved; large-scale data transmission can be realized; requirements for real-time performance and reliability of communication in application can be effectively satisfied; fault spread can be avoided; and the work of a system and the utilization rate of resources can be improved. The circuit and method have high fault tolerant ability.

Description

technical field [0001] The invention belongs to the field of computer hardware control, and relates to a 1394 bus transaction layer-link layer data packet sending circuit and method. Background technique [0002] As a new generation of airborne high-speed bus, the Mil-1394 bus is mainly used for the internal interconnection of airborne subsystems and the data interaction between subsystems. It supports asynchronous transmission and isochronous transmission. According to the division of communication levels, it can be divided into application layer and transaction layer. , transport layer, link layer and physical layer. Among them, the transaction layer is responsible for completing the processing and sending of some functional data packets such as read and write request transactions and lock transactions between the transaction layer and the link layer during 1394 bus data communication. In different transmission rate modes, the IEEE1394 protocol limits the maximum transmis...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the technical problems of data loss and instability in 1394 bus serial communication, the present invention provides a 1394 bus transaction layer-link layer data packet sending circuit, which adopts automatic management of sending data buffers and real-time monitoring of sending data channel data Whether there is an error in the package and the asynchronous and isochronous transmission mechanism of compatible communication data

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