DSTREAM-ST Getting Started Guide Document ID: 100892_1.0_07_en
Version 1.0
Troubleshooting
Check List Things to check
Have the target and the DSTREAM-ST unit power cycled to ensure
normal operating conditions?
To restore normal operating conditions, power-cycle the target and
your DSTREAM-ST unit.
Has the DSTREAM-ST unit booted successfully? Observe the progress of the boot sequence to confirm that your
DSTREAM-ST unit is booting properly. See DSTREAM-ST unit boot
sequence for more information. Check that the STATUS LED is
glowing steady green. If the STATUS LED flashes red, a boot failure
has occured. See Restore a DSTREAM-ST unit for more information.
Is the target system fully powered-up? •
Check that you have followed the power up sequence specified
by the target's documentation correctly. Illuminated LEDs on
the target do not necessarily mean that the SoC and debug
interface are powered.
•
Check if there are any buttons or switches on the target which
must be operated to enable the SoC and debug interface.
•
Check your target's documentation or support channels for
more information.
Does the target SoC have security features that must be disabled or
unlocked during connection?
Check the documentation of the SoC for details about security
features.
Are there any switches or jumper links to set on the target? On some target boards, solder-links, jumper-links, or DIP switches
must be configured to enable debug. Check target board
documentation or support channels for more information.
Is the correct debug connector used on the target board? Some target boards use separate debug connectors for SoCs,
FPGAs, and processor core supervisors. Check if you are using the
correct debug connector.
Is debugging disabled in the target SoC? Some targets disable debugging for security purposes. Check if
debugging is enabled on your target.
Is the target's operating system disabling the debug interface during
the boot process?
•
Try connecting and stopping the target immediately after power
up.
•
Try postponing the boot process using a serial connection to
the target.
Is the connection attempting to load an image into the target SoC
while the cores are running?
Try halting the cores through a bare-metal connection first.
Does the DEBUG LED flash when trying to initiate the target
connection?
Check if the host software is communicating with the correct debug
unit. If using Arm Development Studio, to identify and ensure
you are using the correct debug unit, click the Identify button in
either the Debug Hardware Firmware Installer view or the Debug
Hardware Configure IP view.
Is the connection a simple Connect Only connection in the Arm
Development Studio debug configuration for your target?
A simple Connect Only connection is useful to verify the
connection to the hardware. This type of connection usually does
not run any scripts or load any images on the target. To start
debugging, set the connection as either Debug from entry point or
Debug from symbol in the debug configuration.
Is the Clock Speed (Hz) in the platform configuration set correctly? Problems might occur if the clock speed is set too high. Set the
clock speed to lower frequencies in adaptive and non-adaptive
clocking modes.
Are the nTRST and nSRST signals linked on the target? Enable Linked_SRST_TRST in the Probe Configuration tab in the
Platform Configuration Editor in Arm Development Studio.
Are initialization resets putting the target into an unwanted state? Disable TResetOnInitConnect and AllowICETAPreset in the Probe
Configuration tab in the Platform Configuration Editor in Arm
Development Studio.
Copyright © 2017–2019, 2022 Arm Limited (or its affiliates). All rights reserved.
Non-Confidential
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