ARM DS-5 Using the Debug Hardware Configuration Utilities

Creating debug hardware target configurations5.7 Adding devices to the scan chainYou can manually add devices to the scan chain, if required. You might want to do this in thefollowing circumstances:• You do not want to reset and stop the targets on the development platform.• The autoconfiguration fails.• The Read ROM Table autoconfiguration phase for a CoreSight system fails to find anydevices.• The device configuration on your development platform has changed since you createdthis debug hardware configuration, and the platform contains unsupported devices.For example, you might have added one or more devices to your development platform.In this case, you might also have to change the order of the devices, if the order on thedevelopment platform has changed.To add a device to the scan chain:1. Select the Devices node in the tree diagram.2. Click on Add.... The Add Device dialog box is displayed. The following figure shows anexample:Figure 5-6 The Add Device dialog boxThe devices available depends on your firmware version.NoteDevice groups shown in light gray indicates that the related devices are not available.These are usually seen when you autoconfigure a CoreSight development platform.3. If the device appears in the list of registered devices:a. Select Registered Devices. A registered device is a one that the debug hardwareunit can identify and for which some level of debug support exists. That is, atemplate exists for the device.b. Expand the relevant device group.c. Select the device that you want to add.d. Click on Add. The device is added to the scan chain.ARM DUI 0498F Copyright © 2010-2012 ARM. All rights reserved. 5-12ID021112Non-Confidential