Virtual JTAG Intel® FPGA IP Core User Guide

ID 683705
Date 8/12/2021
Document Table of Contents

Running a DR Shift Operation Through a Virtual JTAG Chain

A simple DR shift operation through a virtual JTAG chain using an Intel® download cable consists of the following steps:
  1. Query for the Intel® programming cable and select the active cable.
  2. Target the desired device in the JTAG chain.
  3. Obtain a device lock for exclusive communication to the device.
  4. Perform a VIR shift.
  5. Perform a VDR shift.
  6. Release exclusive link with the device with the device_unlock command.
  7. Close communication with the device with the close_device command.

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