Digi ConnectCore 9U User manual

ConnectCore™ 9U (UNC90)
U-Boot Recovery Guide
with Digi JTAG-Link, Segger J-Flash ARM

Connectcore 9U (UNC90) U-Boot Recovery Guide
Copyright 2010 Digi International Page 2/13
V1.0 recoverU-Boot-CC9P9360-9750.doc
Document History
Date
Version
Change Description
2010/09/02
V1.0
Initial entry/outline
Table of Contents
Document History............................................................................................................... 2
Table of Contents................................................................................................................ 2
1Problem Description ................................................................................................... 3
2Requirements .............................................................................................................. 3
3Software Setup............................................................................................................ 4
4Hardware Setup........................................................................................................... 5
5Recovery Procedure.................................................................................................... 6
5.1 Program U-Boot using default environment........................................................ 6
5.2 Clean EEPROM environment and flash memory.............................................. 11
5.2.1 Clean/Reset EEPROM environment to default........................................... 11
5.2.2 Erase flash memory (optional).................................................................... 11
5.3 Program your final U-Boot ................................................................................ 12
5.4 Programming MAC and default environment into EEPROM ........................... 12
5.4.1 Customizing network settings (optional).................................................... 13

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1 Problem Description
U-Boot does no output on the serial port, or it is otherwise inoperable. Before
proceeding try the following:
You might be using the wrong serial port. Try all of them.
Wrong baud rate on the serial terminal. By default U-Boot is at 38400, 8, n, 1, n.
U-Boot on your board might boot with different baud rate. Try all the baud rates
between 4800 and 115200.
U-Boot environment/EEPROM could have bad settings. The variable „silent‟
could be set to „yes‟ or „baudrate‟ is invalid, bootdelay is 0, or bootcmd leads into
an immediate crash you cannot recover from. To fix this you will need to clear
environment and set it to the defaults. This can be recovered by following this
guide.
The U-Boot partition in flash might have a bad block. This is irrecoverable and
the device will need to be replaced.
The U-Boot partition was overwritten or erased by accident with non-working
code, or a power outage during a flash erase or write operation. This can be
recovered by following this guide.
2 Requirements
The recovery in this document requires:
ConnectCore 9U (UNC90) module with available serial port on board, and a J-
TAG connector on the board (e.g. Digi FS-358 UNCBAS_3 board).
DG-ACC-JLNK Digi JTAG Link USB 2.0 Debugger (also known as Segger J-
Link ARM)
ohttp://www.digi.com/products/model.jsp?lid=EN&pgid=41&pfid=37&mti
d=2077&amtid=2433
ohttp://www.segger.com/cms/jlink-software.html
oSegger License for Flash programming:
http://www.segger.com/cms/jflash.html
Desktop PC with USB 2.0 host connector and Windows to install J-Link/Flash
USB driver and J-Flash software. Software can be downloaded an installed
without license, but licensed features cannot be used.

Connectcore 9U (UNC90) U-Boot Recovery Guide
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3 Software Setup
Install the JTAG-Link USB 2.0 drivers and JTAG-Commander JLINK.exe on a
MS-Windows PC from http://www.segger.com/download_jlink.html.
These instructions were tested with V4.10b. Installation should work out of the
box, it is explained here: http://www.segger.com/jlink_arm_support.html
Decompress the U-Boot and firmware images available enclosed in the zip file
into any directory, e.g. Desktop\CC9U\ .
The files from the zip should be:
ou-boot-unc90dev-defaultenv.bin, special build not using environment from
EEPROM
ou-boot-unc90dev.bin version released by Digi for CC9U compatible with
old SPANSION S29GL128P flash AND with new NUMONYX
M29W128GH flash. If not included, see:
http://ftp1.digi.com/support/patches/CC9U_UBOOT114_BIN_82002254_
A.zip

Connectcore 9U (UNC90) U-Boot Recovery Guide
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V1.0 recoverU-Boot-CC9P9360-9750.doc
4 Hardware Setup
Connect the J-TAG adapter to the MULTI-ICE connector X4/JTAG on the
development board.
Connect the J-TAG adapter to your PC via the supplied USB cable.
Set Jumper J1 pin 1-2 (to activate JTAG)
Plug the CC9U module to recover in the socket with pin 1 toward the JTAG-
connector.
Connect a serial null modem cable (pins 2 and 3 crossed) to your host computer
and launch a terminal program (e.g. HyperTerminal) with 38400 8N1. Plug the
cable into Serial Port at X2 of the Digi development board.
Connect the power cable/power on the board.
Check: if there is serial output from U-Boot with J1 1-2 removed and you get a
U-Boot prompt at any baud rate, you‟re done.

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5 Recovery Procedure
5.1 Program U-Boot using default environment
Launch the Segger J-Flash tool:
Enter J-Flash License:
File -> Open Project:
Select J-Flash Sample Project Files:

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Select AT91RM9200_Digi_CC9U.jflash project file:
File -> Open:

Connectcore 9U (UNC90) U-Boot Recovery Guide
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Select u-boot-unc90dev-defaultenv.bin from the Zip attached
Enter startaddress (will be corrected automatically later if you leave 0x0):
Select Target -> Program & Verify

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If you get errors, press the reset button on the board and retry several times.
Recheck jumper J1 1-2 is set and power cycle.

Connectcore 9U (UNC90) U-Boot Recovery Guide
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Approve to erase/program flash:
Remove Jumper J1 and Reset/Power Cycle the board, check serial port for output:
U-Boot 1.1.4 (Sep 6 2010 - 18:02:32)
for Digi International CC9U on UNCBAS_3
DRAM: 32 MB
AM29LV128M (16MB)
Flash: 16 MB
In: serial
Out: serial
Err: serial
Hit any key to stop autoboot: 0
CC9U>

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5.2 Clean EEPROM environment and flash memory
5.2.1 Clean/Reset EEPROM environment to default
As the EEPROM could contain environment variables which prevent standard
U-Boot to provide serial output, invalidate the EEPROM checksum, to get it reset
to default:
CC9U> imm 50 500.2
00000500: 20 ? FF
00000501: 73 ? .
CC9U>
5.2.2 Erase flash memory (optional)
You might want to erase the complete flash, to be sure any partitions are cleared
before you later program any file system on them.
CC9U> protect off all
Un-Protect Flash Bank # 1
CC9U> erase all
Erase Flash Bank # 1 ....
CC9U>
You can also do this with the J-Flash “Target->Erase Chip” after reconnecting
Jumper J1 1-2:

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5.3 Program your final U-Boot
Plug Jumper J1 1-2
In J-Flash select File->Open and select you final U-Boot binary (e.g. version 1.1.4
RevA from Digi):
Program this U-Boot into flash with “Target -> Program & Verify” F6 or F7
5.4 Programming MAC and default environment into EEPROM
Remove Jumper J1, and reset/power cycle the board, you should see your final
U-Boot booting:
U-Boot 1.1.4-CC9U-RevA (Oct 15 2009 - 11:03:07)
for Digi International CC9U on UNCBAS_3
DRAM: 32 MB
AM29LV128M (16MB)
Flash: 16 MB
*** Warning - bad CRC, using default environment
In: serial
Out: serial
Err: serial
Hit any key to stop autoboot: 0
## Booting image at 20100000 …
Bad Magic Number
CC9U>

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You need to set the MAC Address as printed on the module:
CC9U> setenv ethaddr 00:04:F3:xx:yy:zz
CC9U> saveenv
5.4.1 Customizing network settings (optional)
Reset the network settings: (Change these to match your desired settings, then
copy/paste them into your terminal connection.)
#setenv ipaddr 10.4.105.100
#setenv netmask 255.255.0.0
#setenv gatewayip 10.4.1.1
#setenv serverip 10.4.105.1
#saveenv