DeviceMaster Installation and Configuration Guide
: 2000594 Rev. F
Troubleshooting and Technical Support - 169
Troubleshooting and Technical Support
Removing DeviceMaster Security Features
When presented with a DeviceMaster that has had all security options set and the user is unaware of what
the settings are, the restoring of a DeviceMaster can be very difficult.
It may be necessary to use the DeviceMaster debug dongle provided with the
Software Developers Kit
(SDK)
or return the DeviceMaster to Comtrol after obtaining an return material authorization (RMA) so that
Comtrol can re-flash the DeviceMaster with default values.
One of the following two conditions must be true, so that you can remove the security settings from the
DeviceMaster.
•
Serial connection using Port 1 to access RedBoot:
-
Bootloader timeout set to value greater than 10 seconds (default is 15 seconds).
-
A known good null modem cable.
-
A COM port on PC/Laptop.
•
Bootloader
Command Console
using an Ethernet connection
-
No password or a known password.
-
A known or discoverable IP address.
-
A utility such as
Angry IP Scanner
may be used to discover IP addresses. If the
IP range is unknown, a full scan from 0.0.0.1 to 255.255.255.255 may take a long time.
-
An Ethernet cable.
-
A PC/Laptop with a telnet application installed such as PuTTY included in PortVision DX.
Serial Connection Method
Use the following procedure to set up serial connection with a terminal server program (for example, Test
Terminal (WCom2), HyperTerminal or Minicom) and the DeviceMaster.
Note:
Optionally, you can use Test Terminal, which is included in PortVision DX under the
Tools >Applications
> Test Terminal
menu.
1.
Connect a null-modem cable from an available COM port on your PC to
Port 1
on the DeviceMaster.
Note:
on Page 73 to build a null-modem cable.
2.
Configure the terminal server program to the following values:
•
Bits per second = 57600
•
Data bits = 8
•
Parity = None
•
Stop bits = 1
•
Flow control = None
3.
Reset the DeviceMaster.
Note:
Depending on the model, disconnect and reconnect the power cable (external power supply and no
power switch) or turn the power switch on and then off (internal power supply).
4.
Immediately type
#!DM
and press
Enter
in the terminal program.
#!DM
RedBoot>dis
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