GW Instek GOM-804 Use and care manual

D.C. Milli-Ohm Meter
GOM-804 and GOM 805
FIRMWARE UPDATE MANUAL
GW INSTEK PART NO.V1.00
ISO-9001 CERTIFIED MANUFACTURER

This manual contains proprietary information, which is protected by
copyrights. All rights are reserved. No part of this manual may be
photocopied, reproduced or translated to another language without
prior written consent of Good Will company.
The information in this manual was correct at the time of printing.
However, Good Will continues to improve products and reserves
the right to change specifications, equipment, and maintenance
procedures at any time without notice.
Good Will Instrument Co., Ltd.
No. 7-1, Jhongsing Rd., Tucheng Dist., New Taipei City 236, Taiwan.

Table of Contents
3
TABLE OF CONTENTS
INTRODUCTION ...........................................................................................................4
Requirements.............................................................................................................................. 4
LM Flash Programmer Installation............................................................................................. 5
FIRMWARE UPDATE PROCEDURE ...............................................................................6
Flashing the Master Microcontroller.......................................................................................... 6
Flashing the Slave Microcontroller........................................................................................... 12
Entering the Slave Bootloader mode.............................................................................................................. 12
Installing the DFU Driver ................................................................................................................................ 14
Flashing the Slave Microcontroller................................................................................................................. 15

GOM-804 & GOM-805 Firmware Update Manual
4
INTRODUCTION
The GOM-804/805 DC Milliohm Meter has upgradable firmware to ensure
your purchase has a long and useful life with updates and improvements.
The meter has two microcontrollers that require firmware updates, a master
microcontroller and a slave microcontroller. The master microcontroller is
used to control the display, the panel keys and SCPI command parsing. The
slave controls the relays and ADC operation for the measurement circuits.
The firmware for each microcontroller must be updated separately and as
such this manual has a master microcontroller update section and a slave
microcontroller update section.
The software used to update each microcontroller is the same
(LMFlashProgrammer.msi), however the interface used and the procedure to
update the controllers is slightly different.
Requirements
Hardware
GDM-804 / GDM-805
USB cable Type A/B
Software
Windows Operating System (XP, Windows 7, 8,
8.1)
Program kit using LM Flash Programmer
DFU driver (device firmware upgrade)
GOM-804 / 805 Firmware
MASTER: GOM805_MASTER_*.BIN
SLAVE: GOM805_SLAVE_*.BIN
Note
Contact your local distributor for latest firmware.

INTRODUCTION
5
LM Flash Programmer Installation
1. Installation
Steps
1. Double click the LMFlashProgrammer.msi file to
start the installation.
2. The installer will launch. Follow the instructions to
complete the installation.

GOM-804 & GOM-805 Firmware Update Manual
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Firmware Update
Procedure
Flashing the Master Microcontroller
Note
Before performing the firmware update, please ensure
that the USB driver for the GOM-804/805 has already
been installed. See the user manual for installation
details.
1. Connection
1. To update the firmware, a Type A-B USB cable is
required.
2. Ensure the power is off on the meter.
3. Insert the USB cable into the USB device port on
the meter’s rear panel.
REMOVE INPUTS BEFORE OPENING.
TO AVOID SHOCK,
WARNING
RS232
SER.NO. LABEL
100 240V , 50 60Hz
25VA MAX
AC
HANDLER / SCAN / EXT I/O
TC SENSOR
GPIB
4. Plug the other end of the USB cable into the PC
that will perform the update.

Firmware Update Procedure
7
2. Enter Boot
loader Mode
5. Make sure that the power is off on the meter.
6. Press and the hold the ESC key and the Drive key
at the same time and then press the power button.
7. The boot loader screen will appear on the screen
after the initial splash screen appears. (Note: The
ESC and Drive keys need to be held until the boot
loader screen appears.)
8. The unit is now ready for the master
microcontroller firmware update.

GOM-804 & GOM-805 Firmware Update Manual
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3. Manual
Configuration and
the Serial Port
Interface
9. Open the LM Flash Programmer.
10. Select the Configuration tab.
11. In the Quick Set drop down list, choose Manual
Configuration.
12. From the Interface area:
To update the “Master”, choose Serial (UART).
Set the COM Port and Baud Rate settings (must be
115200).
If you are not sure of the COM port settings, click
the Device Manager button. When Windows
Device Manager dialog opens, expand the “Ports
(COM & LPT)” node. The COM port and baud
rate that is assigned to the target should be listed.
Leave the transfer size at the default 60.

Firmware Update Procedure
9
13. Select the Program tab. This will allow you to
program the flash on the Stellaris microcontroller.
14. In the Select .bin file area select the master
firmware .bin file: GOM805_MASTER_*.BIN
Notice:” Program Address Offset” must be set
2800.
Warning
Failing to set the Program Address Offset to 2800 will
lead to serious consequences in that the unit may fail to
turn on properly and will need to be returned to GW
Instek for repair.

GOM-804 & GOM-805 Firmware Update Manual
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15. Click the Program button to begin flashing the
microcontroller.
16. When the firmware has been flashed, power off
the instrument & disconnect the USB cable from
the rear panel of the instrument.
17. Power on the instrument. The instrument should
now have the new firmware installed.

Firmware Update Procedure
11
18. You can check the firmware on the instrument in
the System menu:
Select the “System” soft-key at the bottom of the
screen and press Enter.
The master microcontroller firmware version will
be displayed on the screen:
VER: GWINSTEK.GOM805.V1.00/0.17
S/N:GEMXXXXXX.
The master firmware version is shown in red.
19. The update procedure is complete.
20. If the update procedure fails, please repeat the
update procedure again.

GOM-804 & GOM-805 Firmware Update Manual
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Flashing the Slave Microcontroller
Entering the Slave Bootloader mode
Note
Before performing the firmware update, please ensure
that the USB driver for the GOM-804/805 has already
been installed. See the user manual for installation
details.
1. Connection
1. To update the firmware, a Type A-B USB cable is
required.
2. Ensure the power is off on the meter.
3. Insert the USB cable into the USB device port on
the meter’s rear panel.
REMOVE INPUTS BEFORE OPENING.
TO AVOID SHOCK,
WARNING
RS232
SER.NO. LABEL
100 240V , 50 60Hz
25VA MAX
AC
HANDLER / SCAN / EXT I/O
TC SENSOR
GPIB
4. Plug the other end of the USB cable into the PC
that will perform the update.

Firmware Update Procedure
13
2. Enter Boot
loader Mode
5. Make sure that the power is off on the meter.
6. Press and the hold the ESC key and the Range key
at the same time and then press the power button.
7. The boot loader screen will appear on the screen
after the initial splash screen appears. (Note: The
ESC and Range keys need to be held until the boot
loader screen appears.)
8. The unit is now ready for the DFU driver
installation or the slave microcontroller firmware
update.

GOM-804 & GOM-805 Firmware Update Manual
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Installing the DFU Driver
Note
Before the slave microcontroller can be updated, the
DFU driver needs to be installed.
1. Installation
1. Enter the slave bootloader mode, as described
previously on page 12. Do not remove the USB
cable.
The DFU driver can only be installed when in the
slave bootloader mode.
Install the DFU driver and follow the instructions
of the installation wizard. To install the driver,
launch Setup32.exe or Setup64.exe, depending on
whether you are using a 32 or 64 bit version of
Windows.
The driver is located in the User Manual CD, under
the “Driver\DFU Driver Setup”directory.
If a Windows Security message appears, choose
“Install this driver software anyway”.
Note: The GOM-804/805 must be in slave
bootloader mode to install the DFU driver.
2. Check to see that the DFU driver was successfully
installed in the Windows Device Manager.
3. Press: Start > Control Panel > Hardware and
Sound > Device Manager.
4. There will be a new item in the device tree, “GOM
Device Firmware Upgrade”, when successful.

Firmware Update Procedure
15
Flashing the Slave Microcontroller
Note
Ensure that the DFU driver has been installed before
starting to flash the slave microcontroller.
1. Manual
Configuration and
the USB DFU
Interface
1. Open the LM Flash Programmer.
2. Select the Configuration tab.
3. In the Quick Set drop down list, choose Manual
Configuration.
4. From the Interface area:
To update the “Slave” choose “USB DFU”
Remove the usb cable from the GOM-804/805 and
then re-plug it in rear panel.
Press the “Refresh” button, the information
window at the bottom should now read “1-Device
firmware Upgrade”.

GOM-804 & GOM-805 Firmware Update Manual
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5. Select the Program tab. This will allow you to
program the flash on the Stellaris microcontroller.
6. In the Select .bin file area select the slave firmware
.bin file. GOM805_SLAVE_*.BIN
Notice:”Program Address Offset” must be set
2800.
Warning
Failing to set the Program Address Offset to 2800 will
lead to serious consequences in that the unit may fail to
turn on properly and will need to be returned to GW
Instek for repair.
7. Click the Program button to begin the flashing the
microcontroller.
8. When the firmware has been flashed, power off
the instrument & disconnect the USB cable from
the rear panel of the instrument.
9. Power on the instrument. The instrument should
now have the new firmware installed.

Firmware Update Procedure
17
10. You can check the firmware on the instrument in
the System menu:
Select the “System” soft-key at the bottom of the
screen using the arrow keys and Enter key. The
ESC may need to be pressed first to exit from
current function.
The slave microcontroller firmware version will be
displayed on the screen:
VER: GWINSTEK.GOM805.V1.00/0.17
S/N:GEMXXXXXX.
The master firmware version is shown in red.
11. The update procedure is complete.
12. If the update procedure fails, please repeat the
update procedure again.