ARM DS-5 Using the Debug Hardware Configuration Utilities

Creating debug hardware target configurationsNoteYou can also add a device to the scan chain by double-clicking the device.e. If you have multiple devices, repeat steps 4b to 4d to add each registered device.f. After you have added all your devices, continue at step 6.4. You might want to add a device that is not identified by the debug hardware, because it isa device your are currently developing. To do this:a. Select Custom Device.b. Enter the name of the device in the Device Name field. This is used as the name ofthe device node in the tree view, and can have any value.c. Enter the JTAG Instruction Register length (in bits) in the IR Length field.NoteIf you enter an incorrect value for the IR length, any connections that you attemptto make to the device result in failure.d. Click on Add. The device is added to the scan chain.e. If you have multiple devices, repeat steps 5b to 5d to add each custom device.NoteBe aware that you cannot debug a custom device. However, adding the custom device inthe correct order and with the correct length enables you to debug the supported devicesin the same scan chain.5. When you have finished, click Close.NoteYou can remove devices, or change their order in the scan chain, without first having to closethe Add Device dialog box.The following figure shows a number of devices that have been added to the scan chain in ahierarchical manner:ARM DUI 0498F Copyright © 2010-2012 ARM. All rights reserved. 5-13ID021112Non-Confidential