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Multifunctional USB-JTAG interface FPGA download line based on single-chip microcomputer

A technology of USB-JTAG and single-chip microcomputer, which is applied in the field of field programmable logic gate array FPGA download line, can solve the problems of inconvenient use and increased cost, and achieve the effect of low cost and overall price reduction

Inactive Publication Date: 2017-05-10
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The two mainstream FPGA manufacturers in the industry are xilinx and altera. Both FPGAs support the download line of the JTAG interface for programming, but the download lines of the two only support the configuration of their own chips and cannot be mixed. This not only It brings inconvenience to users and increases the cost

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  • Multifunctional USB-JTAG interface FPGA download line based on single-chip microcomputer
  • Multifunctional USB-JTAG interface FPGA download line based on single-chip microcomputer
  • Multifunctional USB-JTAG interface FPGA download line based on single-chip microcomputer

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Embodiment Construction

[0017] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0018] Such as figure 1 As shown, the core of JTAG is the TAG state machine, which writes instructions in the SHIFT-IR state, and then reads or writes data in the SHIFT-DR state. In the present invention, the sequence of the JTAG interface is controlled by the single-chip microcomputer. According to the state jump diagram, first enter the SHIFT-IR state, write control instructions (such as read ID instructions, write configuration data instructions, etc.), and then control the state machine to enter SHIFT-DR Status, read or write the data corresponding to the control command (such as chip ID, configuration data, etc.).

[0019] Such as figure 2 As shown, one end of the download cable is connected to the PC through the USB interface, and the other end is connected to the download port of the FPGA through the JTAG interface. The PC burns the c...

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Abstract

The invention discloses a multifunctional USB-JTAG interface FPGA download line based on a single-chip microcomputer. The single-chip microcomputer is used to simulate a JTAG protocol, and the function of the corresponding download line is realized, and at the same time, an upper computer is used to convert a programmed file according to the model of the FPGA acquired by the single-chip microcomputer, and is used to transmit the file to the single-chip microcomputer by a USB interface, and then the single-chip microcomputer is used to transmit the file to an FPGA development board. The multifunctional USB-JTAG interface FPGA download line is advantageous in that versatility is provided, and one line and one program are adapted to various FPGA development boards, and therefore expenses incurred for repurchasing devices are prevented, the costs of the download line are reduced, and upgrade extension is conveniently carried out.

Description

technical field [0001] The invention relates to the technical field of a field programmable logic gate array FPGA download line, in particular to a multifunctional USB-JTAG interface FPGA download line based on a single-chip microcomputer. Background technique [0002] The two mainstream FPGA manufacturers in the industry are xilinx and altera. Both FPGAs support the download line of the JTAG interface for programming, but the download lines of the two only support the configuration of their own chips and cannot be mixed. This not only Bring inconvenience in use to the user, and increase the cost. Contents of the invention [0003] The present invention proposes a USB-JTAG download line based on a single-chip microcomputer (the single-chip microcomputer model adopted by the present invention is CY7C68013A), which can support configuration of FPGAs of Xilinx and Altera and other chips that support JTAG interface programming. [0004] The technical scheme adopted in the pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/042
CPCG05B19/0426G05B2219/23194
Inventor 卢建良王悦
Owner UNIV OF SCI & TECH OF CHINA