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Method and device for upgrading complex programmable logic device on line

A technology of programming logic and logic files, which is applied in the field of online upgrading of complex programmable logic devices, can solve problems such as difficulty in on-site program upgrades and high maintenance costs, and achieve the effects of convenient online updates, improved utilization, and reduced costs

Inactive Publication Date: 2010-11-24
ZTE CORP
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AI Technical Summary

Problems solved by technology

[0006] Usually, the logic file of CPLD needs to be sintered with a special cable, and the download cables of different manufacturers are not exactly the same. Therefore, it is difficult to upgrade the program on site and the maintenance cost is high.

Method used

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  • Method and device for upgrading complex programmable logic device on line
  • Method and device for upgrading complex programmable logic device on line
  • Method and device for upgrading complex programmable logic device on line

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Embodiment Construction

[0031] The basic idea of ​​the present invention is: use software algorithm to simulate the change law of JTAG timing, and then use a level conversion module to realize the output of JTAG level, so as to complete the online update of the lower-level CPLD logic on the daisy chain connected to it.

[0032] Based on above-mentioned thought, the present invention provides a kind of device of upgrading CPLD online, mainly comprises following functional modules:

[0033] CPLD logical file storage module, storing the CPLD logical file in binary format for online upgrade;

[0034] The business single-board processor module is used to send online upgrade commands, and after converting the CPLD logic files in binary format to non-JTAG timing levels, output the information of the CPLD to be upgraded and the converted non-JTAG timing levels to the level conversion module;

[0035] The level conversion module is used to convert the information of the CPLD to be upgraded and the standard J...

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Abstract

The invention discloses a method and a device for upgrading a complex programmable logic device on line. The method comprises: storing a to-be-upgraded CPLD logic file in a binary format, and converting the to-be-upgraded CPLD logic file in the binary format into a JTAG time sequence electrical level when the CPLD is to be upgraded; according to a non-JTAG time sequence electrical level, simulating a standard JTAG time sequence electrical level by using a register; and gating a subordinate CPLD of the to-be-upgraded CPLD, and writing the standard JTAG time sequence electrical level into the to-be-upgraded CPLD to complete the online upgrade of the to-be-upgraded CPLD. When the method and the device are used, the CPLD device can be upgraded on line directly without cable sintering.

Description

technical field [0001] The invention relates to the field of software technology, in particular to a method and device for upgrading complex programmable logic devices online. Background technique [0002] JTAG (Joint Test Action Group, Joint Test Action Group) is a standard for detecting PCB (Printed Circuit Board, printed circuit board) and IC (Integrated Circuit, integrated circuit board) chips formulated in 1985, and revised to IEEE (Institute) in 1990 of Electrical and Electronics Engineers, IEEE 1149.1 of the Institute of Electrical and Electronics Engineers. The IEEE1149.1 standard was first proposed by the JTAG organization, and finally approved and standardized by the IEEE. Therefore, the IEEE1149.1 standard is also called the JTAG debugging standard. [0003] The standard JTAG interface is 4 lines, respectively: TMS (Test Mode Select, test mode selection), TCK (Test Clock, test clock), TDI (Test Data Input, test data input), TDO (Test Data Output, test data outpu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F9/445
Inventor 王媛媛高洪
Owner ZTE CORP
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