Control method and control circuit for realizing cpld on-line programming and off-line programming

An off-line programming and control circuit technology, applied in the field of CPLD and digital integrated circuits, to achieve the effects of reducing maintenance costs, convenient debugging, strong versatility and practicability

Active Publication Date: 2017-12-19
湖州丰源农业装备制造有限公司
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  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above-mentioned shortcoming of prior art, the object of the present invention is to provide a kind of control method and control circuit that realize CPLD online programming and off-line programming, be used to solve in prior art can't realize CPLD simultaneously and support online programming and off-line programming at the same time The problem

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  • Control method and control circuit for realizing cpld on-line programming and off-line programming
  • Control method and control circuit for realizing cpld on-line programming and off-line programming
  • Control method and control circuit for realizing cpld on-line programming and off-line programming

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Embodiment Construction

[0030] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention.

[0031] The object of the present invention is to provide a control method and a control circuit for realizing CPLD online programming and offline programming, which are used to solve the problem that CPLD cannot simultaneously support online programming and offline programming in the prior art. A kind of realization CPLD on-line programming of the present invention and the principle and implementation of the control circuit of off-line...

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Abstract

The invention provides a control method and control circuit for realizing CPLD online programming and off-line programming. The control method and the control circuit are applied to the control of programming of a CPLD arranged on a single board computer. The control circuit comprises a CPU of the single board computer, wherein the CPU realizes online programming of the CPLD by outputting four general-purpose input / output GPIO signals to JTAG interfaces of the CPLD; a driving circuit which is connected between the CPU of the single board computer and the CPLD, and is used for communicating or blocking a loading channel between the CPU of the single board computer and the CPLD so as to control the CPLD to be in an online programming mode or an off-line programming mode; and a connector which can enable the CPLD to be connected to a control terminal for controlling the off-line programming of the CPLD by connecting with a loading cable, wherein a first pin and a fourth pin of the loading cable are connected to form a short circuit. The two working modes of online programming and off-line programming of the CPLD are supported simultaneously under the condition of not needing man-made or software extra configuration.

Description

technical field [0001] The invention relates to the technical field of digital integrated circuits, in particular to the technical field of CPLD, and specifically relates to a control method and a control circuit for realizing CPLD online programming and offline programming. Background technique [0002] CPLD (Complex Programmable Logic Device) complex programmable logic device is a device developed from PAL and GAL devices. It is relatively large in scale and complex in structure, and belongs to the scope of large-scale integrated circuits. It is a digital integrated circuit in which users can construct logic functions according to their own needs. The basic design method is to use the integrated development software platform to generate corresponding target files by means of schematic diagrams and hardware description languages, and transmit the code to the target chip through the download cable ("in-system" programming) to realize the designed digital system. . The CPLD...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/042
CPCG05B19/0426G05B2219/25314
Inventor 王亦鸾
Owner 湖州丰源农业装备制造有限公司
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