||Corrected the following bugs found by JR in the previous version.
- viewing Live Data from a XoomBox which has never had its date/time
set causes an application failure and untidy exit!
- If a logfile has no wheel speed readings at all, then the
import script removes the 'Distance Traveled' channel because it
is empty. This then causes an exception to be raised when the
mouse is moved over a graph created from that logfile because the
tooltip 'distance traveled' information cannot be found.
- The operation of the 'Save' button on the vehicle configuration
editor was very unintuitive. This has been revamped to a more
conventional OK, Cancel, Apply arrangement.
Added the ability to import and export plugins so they can be swapped
amongst users more easily.
||Solved the issue regarding the location of vehicle
configuration and JScript files, thus I can now update the software
version no. with each release without these files getting lost.
The installer should also now handle uninstalling previous versions
Combined with firmware 1.13, there are 2 new vehicle
- The revlimiter function can be disabled completely instead of
simply setting a large limit.
- For ecus (Emerald) which generate 2 injector pulses per 4 stroke
cycle, you can select a different injector cut sequence. This
should give more consistent traction control behaviour across
Added a button to the Plugins toolbar which allows adjustment of the
plugin timeout. Running complex scripts on large logfiles can
cause the default timeout (30seconds) to be exceeded. You can now
increase this timeout, and the error message when it is exceeded is
handle in a rather more graceful fashion (!)
||In line with firmware 1.14, this version has corrected
handling of east vs west longitudes. If you're using firmware 1.14
with a GPS, then you need to use this version of XoomCentre or later.
Also corrects a rather strange problem with auto scaling of the right
hand vertical axis on graphs.
Note that if you have had a previous version of XoomCentre on your
machine, the installer doesn't replace your plugins file, so download
the GPS processing plugin (also updated here) from the link below.
To update the plugin, go to the plugins pane, delete the existing 'GPS
Processor' and then use the import button on the toolbar to load the new
||Major extensions to graphing capability and to the
object model visible to plugins.
For examples of the new graphing
features, see the help file page 'XoomCentre
Software\Tutorials\Reference Runs and Graph Strips'.
After installation, if you are replacing an existing XoomCentre
installation, please perform the following steps.
- From the Tools menu, click Restore Toolbars.
The names and content of a no. of the docking toolbars have changed in
this version of XoomCentre, and this is likely to cause problems with
existing docking setups. Selecting this menu item will
restore a standard set of locations and dock options for the toolbars.
- On the Plugins toolbar, click the Restore command
button to update your plugins with the latest. This function
will not delete or overwirte any existing plugins, but it may change
their names if they clash with the standard set. For example, if
you have modified your 'Autoexec' plugin, it will be renamed to 'Autoexec_old'
and the standard one reinstated as 'Autoexec'.
All the plugins have been modified to a degree (at least by the
addition of a comment section at the top describing what the plugin
does), so you may well have a lot of '_old' plugins after this
procedure. If you have never modified these, then you can safely
delete all the '_old' items.
The documentation - online as well as that included in the installer
- now has a section detailing the function of each plugin. You'll
find it in section 'XoomCentre Software\Data Processing and Plugins\Standard
||No changes to the code, but an unused library (GSSF.AX)
has been removed from the installer. On some machines, this
library was causing an error during the installation process. If
your installation (of version 126.96.36.199) completed without error, then
there is no reason to download this version.
||Corrects a bug with scrolling graphs. When using
extreme zoom levels, trying to scroll quickly to the right could cause
the program to hang.
||A very small change to the PlugIns, only of interest if
you're processing large files
Added a couple of functions to the
JSTrace and JSLogFile objects to allow blocks of data to be removed from
a JSTrace with a single call and to do the same to all JSTraces in a
JSLogFile. The result is a simpler and dramatically quicker
Remember after installation to use the Restore button on the
PlugIns toolbar to update TrimStart to the new version
||The first version of XoomCentre to support the V2
XoomBox. The major change is the X10der page in the vehicle
configuration which allows configuration of the various available X10der
modules for the V2 XoomBox.
Logfiles created by the matching V2
firmware have a different structure to allow the X10der modules to
contribute data to the data logs. You must use this version of
XoomCentre to import these logs.
||Used with firmware 2.03, this adds a velocity feedback
parameter to the launch control. During launch, the injector cut
mode is calculated on a mixture of engine speed and the rate of change
of the engine speed.
Set the new parameter to 0 to give launch control
behaviour as in previous versions. If you find that the engine
speed tends to hunt during launch, instead of holding steady, then
increase the value of this parameter. We find a value of 8 gives
||Some useful improvements I think.
- The vehicle configuration dialog had grown a bit big. Too
big in fact for most laptop displays to show correctly. There's
no change to the functionality, but I've rearranged some of the panels
to reduce the amount of screen space occupied which makes it generally
easier to use.
- With GPS and the gear shift control working, the no. of logged
signals was getting quite large, and finding the signal you wanted on
the 'LogFiles' window was becoming awkward. To help with this,
I've implemented groups of signals so that when you expand the
treenode for a particular run in the LogFiles window you now see
several groups, rather than the complete list of signals. Expand
each of the groups to find the original signals. Each time you
import a logfile, the signals are assembled into groups for you.
There's also a new plug-in 'Fix Groups' which will create all the
groups for any existing project files you may wish to convert.
- Several of the plug-ins had parameters to select exactly how they
performed, but to set these parameters it was necessary to open the
plug-in source code in the editor and read the parameter descriptions
in the code. Whilst OK for us programmer types, it's not exactly
ideal for most users. I've now separated the parameters, so if
you double click on a plug-in, you see a list of the parameters, their
current values and a brief description of what each does. (Use
the 'Edit' button on the toolbar to edit the plug-in source).
The 'AutoExec' plug-in in particular has a lot of selectable options
which benefit from this.
- To improve error reporting from plug-ins, the functions which
plug-ins call to obtain objects by name (for example
LogFile.GetTraceByName) now raise errors if the named object does not
exist rather than returning 'null'. The error message "LogFile
does not contain a signal named 'Long Acc'" is much easier to
understand and track down than "Object null or undefined"!
To make use of these changes, many of the plug-ins have been slightly
modified. Please make sure to click the 'Refresh' button on the
Plug-ins toolbar after installing this update to switch to the new
versions. As usual, any plug_ins with names ending in '_old' may
be deleted after this is done.
||Various changes here
- Reads files from firmware 2.04 (5Hz internal GPS)
- Added animated diagrams to the 'Realtime data' display.
Additionally, if you have the 5Hz internal GPS receiver and an
internet connection, then the 'Realtime data' display has a new tab
that shows your current location using Google Maps.
- The 'Views' menu has a new entry - "Google Maps". If you
have an internet connection, then displaying this view and then
dragging one of the logfiles from the current project onto the view
will display the GPS track overlayed on a Google Maps view of the
circuit. If you have used a reference lap to define the location
of the finish line and/or a lap beacon, then those will be displayed
- Firmware updates may be installed on your XoomBox direct from
XoomCentre. Select Upload Firmware... from the Tools
menu to access this function. This ends the dependency on the
the 3rd party tool AVRPROG.EXE and the problems that code had with
some USB com ports. You still have to put the XoomBox into
bootloader mode as
before, but the rest is self contained - just open the firmware file
and press the Program button..
||Major change to the way plugins work. Prior to
was being syntax checked as it was running. This environment is
not supported on 64 bit versions of Windows, so we had to change!
this version onwards, we will be using Microsofts JScript.NET compiled
environment. This does involve a few changes to existing plug ins
- mainly for the better - and the pay back is considerably faster
execution of plugins. As previously, remember to click the
Restore button on the plugin manager toolbar to install updated
versions of all the standard plugins.
If you have written any of your own plug ins, they may have to be
updated to take advantage of the new speed. Take a look at any of
our standard plug ins to see the changes. The most obvious is that
parameter and variables can now have types declared (optional, improves
speed if you do it) and arrays are now accessed usng the more
conventional arrayName[index] syntax.
For a full description of the JScript.Net syntax, see
The Live Data has been updated to allow direct selection of
the serial ports available on your computer by populating the contents
of the drop down list box when you click it. Also, the port you
select will be remembered the next time you run XoomCentre.
||Added CSV file import
||Additional vehicle configuration options to support
||If you have a reference run and end beacon defined in
your project, this plugin will delete data more than a certain time
after you pass the end beacon. The amount of time left after the
end beacon is a parameter - default value 3s
||The Boyndie event was the first successful use of the
GPS logging. Both projects from this weekend have good data.
patterns during launch restricted to cut 1 in 5 and cut 1 in 3.
Produced smoother rpm control than previously but required some throttle
feathering to prevent excessive wheelspin for the first second or two.
||Added firmware version info to the live data output, you
need the appropriate version of XoomCentre to see this.
minimum acceptable time between wheel pulses to 12ms. As a result, the
wheel speed measurements are taken across 3 pulses instead of 2 at a
much lower speed which resulted in a noticeable improvement in noise
levels on the speed measurements.
Changed the injector cut patterns to 1 of 5, 2 of 5, 3 of 5, 4 of 5
looking for better control of torque generally. During launch, 1
of 5, 2 of 5 and 3 of 5 are used which removes the need to feather the
throttle. Not entirely successful, the engine rpm still tends to
hunt more than we would like, although better than previous versions.
||The club event on the Saturday - before our gearbox
nearly fell out
||The Machars sprint. First use of Evermore GPS, and
results not very good! Bad day for satellites
||Clockwise, T1 runs both under 84s
||PBs for both drivers
||PBs for both drivers. Timed runs wet
||First use of Elite sequential gearbox, still manual
shifting - a learning
process. Quick when the driver gets it right, but too many fluffed
||No GPS data - broke the connector!
|All the 2009 projects
||All the projects from 2009 - mostly Caterham gearbox (70
|All the 2010 projects
||All the projects from 2010, Elite gearbox with pneumatic
shift (119 MBytes). Later in the year use the Globalsat GPS with
much better results than Evermore.
|All the 2011 projects
||For 2011, we added our own 5Hz GPS receiver (105 MBytes)
|All the 2012 projects
||Switch to 2.0L Duratec and changed class to modified, so
running on slicks (88 MBytes)
||First version of serial bootstrap loader (38400 baud)
||Very occasionally, the 38400baud bootstrap has been seen
to fail with some PCs (particularly the verify operation). This
version is the same code, but with the baud rate reduced to 19200.
AvrProg works identically with both except of course that the code
download will take twice as long.
||Used this at Golspie on the 13th and 14th of September
It has the first iteration of the GPS code and the first version of the
launch control that attempts to reduce the engine rpm after launch but
before the driven wheels have stopped spinning. There a 2 problems with
The GPS firmware does not validate the checksum on incoming data. We
found that this sometimes causes the GPS processing to get confused. All
the important XoomBox functions are unaffected (launch control, traction
control, shift lights) but the logfiles lose their timing and are
effectively useless. The problem seems to be related to what the GPS is
doing at the moment you turn the XoomBox on and happened about one time
The rpm reduction during launch worked almost as expected! There was a
tendency for the engine revs to hunt which you can clearly hear in the
videos we took at this event. The launches still worked ok, but it's not
what was intended
||Used this at Boyndie for the last event of the season.
Added careful checking of the GPS checksum which appears to have
corrected the logging problem we had at Golspie.
Changed the launch control to allow 1 in 5 and 1 in 3 cut modes during
launch (previously also had 2 in 3). This solved the rpm hunting issue
seen at Golspie, but at the cost of requiring more throttle feathering
from the driver during the first second or so.
||For the test day at Kames '09
Added firmware version info to the live data output, you need the
appropriate version of XoomCentre to see this.
Tripled the minimum acceptable time between wheel pulses to 12ms. As a
result, the wheel speed measurements are taken across 3 pulses instead
of 2 at a much lower speed which results in a noticeable improvement in
noise levels on the speed measurements.
Changed the injector cut patterns to 1 of 5, 2 of 5, 3 of 5, 4 of 5.
Intended to give us better control of wheelspeed during the launch.
||Used at the Kames weekend. Because of the
additional functions, be sure to use the corresponding release of
Corrected bug with using an analogue input to adjust the
traction control. With the previous version this setting was lost
when power to the XoomBox was removed.
Added option to disable rev limiter function
Added option to alter the injector cut sequence to suit Emerald ecus
which fire the injectors twice per 4 stroke cycle instead of once.
Emerald ecus will work ok with either sequence, but will give equivalent
traction control behaviour to other ecus when this is used.
Without this setting, the emerald ecus cut twice as many cylinders as
Increased the no. of cylinders which are cut during launch and
traction control. This means that performance with Emerald systems
remains the same as before and other systems now behave as intended.
Previous firmware versions on very powerful cars were cutting too few
cylinders to control wheelspin adequately.
||Corrected problem with logging GPS data from some
receivers (Evermore) which send an additional digit of precision in
latitude and longitude. Also corrected recording of westerly
longitude values which in previous firmware was incorrectly stored as
To get correct interpretation of the GPS logs, be sure to
use XoomCentre 188.8.131.52 and the version of the GPS processing plugin
||First firmware version for the V2 XoomBox. This
adds support for the X10der modules and writes a slightly different
datalog with provision for extra data channels provided by the X10ders.
You must use XoomCentre 2.0.0 or later to import logfiles from this
This firmware can run on either V1 or V2 XoomBoxes.
||Added a velocity feedback parameter to the launch
control algorithm. During launch control, the amount of power
applied is based not just on engine rpm, but also on the rate at which
rpm is changing.
Use XoomCentre 2.0.2 to set the new parameter.
You must also reload your parameters after installing this firmware
||Adds support for the 5Hz internal GPS receiver.
Differences in the way position is reported compared to standard NMEA
receivers meant a small change to the logfile structure. This
means you have to use XoomCentre 2.0.4 or later to read files created by
||Corrects bug in rev limiter, supports SDHC memory cards,
improves async nature of shiftlight status displays, allows programming
of maximum cut level used by launch and traction control functions
Home | Up | V1 Hardware | First XoomBox Delivery | XoomBox V2 | Xtra Flat Shift | GPS Receiver | XoomBox Software | Documentation | Updating Firmware | Downloads | Future Developments
This site was last updated