This page is meant to serve as a repository for my freeware
applications for Symbian devices - as usual, they come with no warranty
and no promise of support. ;-)
Proof-of-concept CPU monitoring
I wrote this program as I am not currently aware of any other attempts
at providing CPU usage monitoring for Symbian. Even though this may not
seem quite as important on a system that is typically not used for
multi-tasking, I still found it useful in development to be able to
check for any time consuming background processes that may be
accidently triggered by careless use of timers and drain the battery.
This application is very bare-bones (built on the foundations of the
HelloWorld sample from the SDK). As most CPU monitors, it is
self-calibrating, i.e. it assumes that the lowest ever CPU usage it has
seen is considered as "0%", even though this may already include some
background activity by the system itself. This explains why CPU usage
with CPUMon in the foreground will go up to about 1% after you have
switched back to another application at least once - it has then
experienced the system's performance without the load of updating its
own graphics and made that its new baseline for performance.
One possibilty to make it more useful is to set it as the Preferred
Application in the Extras menu, so you can always switch back to it by
hitting Ctrl-Extras after profiling another application in the
Just a few words on the principle, in the hope that somebody else picks
up on the idea and turns it into something more configurable (for
example, it would be nice to have the current CPU load in a corner of
screen to see in real-time what impact an application has):
The application esentially uses two timers at different priorities, one
that fires up to 100 times a second at "Idle" priority, and one at
"High" that checks once per second how many times the Idle timer was
called (only the most important bits shown, of course):
A possible enhancement would be to use a CHeartbeat instead of a
CPeriodic, to deal with cases where the timer does not get called for
more than a second because of very high levels of activity.
In addition to Forum Nokia, there is now another completely
seperate set of discussion boards with a much better interface at Nokia Knowledge Network. Why
they would keep up two offerings in parallel is anybody's guess.
Nokia's classic Symbian developer
section on Forum Nokia. [Note: registration required.]
on Forum Nokia [account required] describes how to connect the 9210
emulator to an NT RAS server.
There is also a specific section of Forum Nokia
that is dedicated to Nokia development in the Americas (e.g. with the
upcoming 9290 Communicator for GSM1900 networks).
newsgroups on Symbian's news server.
Symbian now makes an early Alpha of OPL
for Crystal available - only for "Professional" members, though.
seems to look like the definitve answer from Symbian on the RAS
Ari Kemppainen's EPOC
page, for example with "BattleShips" from Professional Symbian
Programming migrated to EPOC v6 crystal.
A group working on a Linux version of
various EPOC SDKs, including the 9210 Crystal one.
RAS project provides a way to connect Nokia's SDK emulators to the
Internet via RAS, with the help of a Linux box.
Helpful tips describing all the steps necessary to get Java apps
onto the 9210 can be found here.
More information on everybody's favourite subject - getting an
EPOC Emulator to connect to Windows NT RAS...
Applications for the Win32 emulator
While Geos allows using the same binary for both the phone and the
PC-based emulator, the fact that EPOC devices typically do not use x86
CPUs makes it necessary to compile seperate versions for emulator and
final device. As the phones are not available yet, I tried to collect a
few links to applications that can be used on the Win32 emulator for
Nokia 9210 "Crystal" SDK. The SDK is available from Nokia through an
order form at Forum Nokia.
The beta version of a SyncML
client from Nokia. This lets you to test the 9210's synchronization
behavior against your SyncML server, if you happen to have one
[Note: requires a Forum Nokia account.]
for 3D graphics, together with a three-dimensional pool game -
already looks quite impressive in its current state.
you can subscribe to Nokia Germany's 9210 newsletter.
has a detailed review of the device and lots of information on released
and upcoming software products. Even better now it has been moved to a
server with fast conenctions outside Poland.
repository of EPOC shareware, freeware and demos. Most of it has
originally been written for the Psion PDAs, but almost anything on this
page would be an immediate candidate for a 9210 port...
EpocCity - news and views
from around the EPOC world...
The ER6 spinoff from
epochelp.com is also quickly becoming a good collection of 9210
resources. Most of the information can be found under the "Crystal"