When there are multiple installed applications that
are capable of handling a IR beamed object, how does
the PalmOS decide which one to call (first)?
Thanks.
Ron Nicholson
HotPaw
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browsers (like those that run under PalmOS!!!)
Regards,
Ron Nicholson
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fine resolution timers
themselves incidentally...)
Regards,
Ron Nicholson
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mplying that *future* units may have different
display hardware (obvious since they may even have a different CPU ISA.)
Regards,
Ron Nicholson
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has pdf's available
here:
<http://ebus.mot-sps.com/ProdCat/psp/0,1250,MC68EZ328~M934310090795,00
.html#documentation>
IMHO. YMMV.
Ron Nicholson
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on <[EMAIL PROTECTED]> [writes:]
..
How can force a low battery on a Palm V or POSE ???. I want to catch the
event in my app, but I need to be able to debug it. But that means I need to
be able to create the warnings to order. Can this be done.
Regards,
Ron Nicholson
HotPaw
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Thoughts on registration and software protection for PalmOS apps
by Ron Nicholson, HotPaw, <http://www.hotpaw.com/rhn/palm/ >
First note that the customer base for PalmOS applications is constituted by
all different kinds of people. Different ethics. Different nationalities.
Dif
round 11k max.
Ron Nicholson
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frequency offset on all Treo 650's at this
requested sample rate?
On a few Tungsten T's which I've checked, the sample rate of 8000 was
within 0.1% of exact.
Thanks,
Ron Nicholson
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? Or will
it crash like some of the OS 5 Sony Clie models?
Thanks,
Ron Nicholson
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Same boat. Doesn't remember any registrant at any of my email addresses.
And I've been registered for a very long time (since sometime in '96 IIRC).
Ron Nicholson
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nce), which can be a performance problem.
Ron Nicholson
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ords (above, say, a
16k boundary) can sometimes cause a measurable impact on
performance. So YMMV.
Ron Nicholson
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t smaller (perhaps moving some ot the code into subroutines?). Do you
have code at the beginning calling procedures near the end? Try moving
the calling code or the called procedure towards the middle. etc.
Ron Nicholson
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ration,
OS calls, graphics rendering, arm/pnolet cache usage, etc.
Note that some OS DB calls take much longer than others. This is
something you can profile or benchmark.
A version of the POSE emulator includes profiling capability.
Ron Nicholson
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de for a
small trig library. You should benchmark any math library or floating
point operations, and compare with the time available inside a sound
stream callback. You might find that you need to move any floating
point calculations outside the callback, or use scaled integer math
instead.
R
e when using arm native code . Sin waves with
a frequency accuracy of better than 0.1 Hz should be trivial using these
methods.
IMHO. YMMV.
Ron Nicholson
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t; sndUInt8
> sndMono
Try sndInt16Little instead on the T|T.
Not all devices support all soundstream formats and rates.
Ron Nicholson
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t func runs.
>Can someone help me and tell what's wrong? ...
You might want to ask this question over in the PalmOS pno-forum. You
could be having a data cache flush or icache-invalidate related problem with
your poke'd in armlet.
Ron Nicholson
HotPaw Productions
http://www.hotpaw.c
worth of sound samples into bufferP
or else whatever garbage is in the buffer will also become a sound.
But if you only want a system sound every K seconds, why are you doing
this in a callback instead of from your event loop using TimGetTicks()?
IMHO. YMMV.
Ron Nicholson
HotPaw Product
.
Ron Nicholson
HotPaw Productions
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textbooks on computer music
and computer music synthesis. Some textbooks on digital signal
processing and audio processing also cover a bit of this subject.
There are several methods of sampled sound synthesis or playback
which all have various advantages and disadvantages.
IMHO. YMMV
there are API's in the Cobalt documentation.
IMHO. YMMV.
Ron Nicholson
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t;file that contains the 68k code, but this file also has the .prc database
>header. I only want the pure 68k code, without the .prc header or resources.
You can use the "par" utility to extract a resource from a .prc to a .bin file.
Ron Nicholson
HotPaw Productions
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high-density screen
>whichever fonts I selected.
>
>Is it a must to make custom fonts? Any advice and suggestion.
Search the forum archives for "small text with high density" and "tiny fonts" :
http://www.escribe.com/computing/pcpqa/index.html
for two different m
002L) != 0,
your ARM code will crash. Pointers returned by malloc on Palm OS 5+
won't have this problem.
IMHO. YMMV.
Ron Nicholson
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others as well...
YMMV.
Ron Nicholson
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not a troll. This is a suggestion about a possibly desirable
direction for OS 4/5/Garnet support which will allow developers
to adopt the Cobalt API's sooner.
I would like to port my apps once, but still have my code run on
the millions of OS 4/5 devices in the field.
IMHO, YMMV.
Ron Nichol
s are
provided on OS versions which don't provide these oft-asked for
features, and the app guidelines recommend informing the user
appropriately ("I'm sorry, the only encryption type available on
Palm Pilot OS 1.0 is double ROT13; do you wish to proceed?" :-)
IMHO, YMMV.
R
T|T2.
You might try asking over on the Sony Clie handheld developer forum
over at cliedeveloper.com
IMHO. YMMV.
Ron Nicholson, Palm OS(tm) Certified Developer
HotPaw Productions
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s that come for free with OS X can build Carbon applications,
and are quite easy to use.
Converting to use the OS X Cocoa API and Objective-C or Java is
likely to require a much larger rewrite for any typical PalmOS
application written in straight C and the classic (non-Cobalt)
PalmOS API's.
ver manage to get the simulators running
>under wine :)
The Cobalt/OS 6 simulators do, in fact, run under VirtualPC 6
on a Mac (OS X)...
... very slooowlllyyy... but they do work.
Ron Nicholson
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d by various the RAD tools somehow become
perceived by the market as having equal or higher quality, then
the Palm Powered logo will lose much of its value.
IMHO. YMMV.
Ron Nicholson
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n (notification or sound callback, etc.) it won't
have those global variables set up, and will probably crash
when trying to access them.
Test this by getting a pointer to the callback subroutine
and calling it from a completely different application. Be
prepared for a crash and reset.
IMHO
mOS models often have much larger dynamic heaps than
some older models.
IMHO. YMMV.
Ron Nicholson
HotPaw Productions
http://www.hotpaw.com/rhn/palm
-- Original Message --
On Mon, 26 Jan 2004 17:30:55, Fruber Malcome wrote:
>In our application we do quite a lot with JPEG libraries and
haps a better way to state this is to ask if you application completely
ignores these launch codes, including never touching or allocating globals
or global variables, or any functions or subroutines in any other code
segments when you app is launched (it will be) with these launch codes.
IMHO. YMMV.
th) both before and after
SndStreamDelete().
Regards,
Ron Nicholson
HotPaw Productions
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ference. That will tell you whether or not PACE is
a factor in the problem.
Ron Nicholson
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http://www.hotpaw.com/rhn/palm
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On Fri, 9 Jan 2004 19:52:25, Robert Scott writes:
>It seems
>that PalmOS always saves the pixels before they are obscured, and
>restores them again when the obscuring form goes away.
...unless available dynamic memory is very low (and something like
an alarm goes off).
Ron Nichols
y */
x = 0.0 / 0.0; /* indeterminate */
x = -0.0 / 0.0; /* negative indeterminate */
Ron Nicholson
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t as much as an entire small FFT on some
models. See the PalmSource pno-forum for details. Any data
reduction that can be performed inside the callback can also help
out with cache and performance issues if your foreground task
(a game, for instance) is quite CPU intensive.
IMHO. YMMV.
Ron Nic
function. Is that going to cause any drag?
You could benchmark FtrGet, or any other OS call for that matter,
but putting it in a loop and seeing how many times you can call
it in n ticks on a given device, then report back here and let us
know.
YMMV.
Ron Nicholson
HotPaw Productions
http://ww
the callbacks should occur less
frequently. Or you could use a native ARM callback to generate
samples more rapidly.
IMHO. YMMV.
Ron Nicholson
HotPaw Productions
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IMHO. YMMV.
Ron Nicholson
HotPaw Productions
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WinSetForeColor() and WinSetForeColorRGB()
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pennys, not dollars. Then you won't get any of the fractional rounding
errors implicit in the binary/decimal fp conversion process if you are
only doing addition/subtraction operations without mantissa overflow.
IMHO. YMMV.
Ron Nicholson
HotPaw Productions
http://www.hotpaw.com/rhn/palm
-
Foley and van Dam, is one highly regarded textbook on the subject.
You can also examine the code inside various software texture-mapped
3d renderers. You might also want to use interpolation if you don't
want small bitmapped fonts to look even more ragged after rotation.
IMHO. YMMV.
years worth of extensive archives.
Native ARM streaming sound callbacks work quite well when
one has a lot of processing to do.
IMHO. YMMV.
Ron Nicholson
HotPaw Productions
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y
depth, and whether any network or communication stacks are running
Gremlin testing is always advisable. But one needs to leave more dynamic
heap free than just that required by Gremlin testing if one want to play
polite with unknown "hacks" or notification manager sublaunch calls wh
resolution?
IMHO. YMMV.
Ron Nicholson
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app runs under an OS 5 browser instead of an older web clipping
browser, then you can always create an arm/pnolet which can have its
own set of global variables (using CW 9.2 or other techniques) separate
from those of the 68k app, and call that arm/pnolet through a 68k
sublaunch or notification stub.
se I modify my source code far more often than my resource
files; and this method allows me to create a new build which includes an
updated "About" version string with one less step.
IMHO. YMMV.
Ron Nicholson
HotPaw Productions
http://www.hotpaw.com/rhn/palm
--
For informat
ck, even if it has to generate some filler
sound (silence if necessary).
IMHO. YMMV.
Ron Nicholson
HotPaw Productions
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er
length and the speed of processing each packet buffer.
IMHO. YMMV.
Ron Nicholson
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, the LSB's
of several seconds of background noise seems to have a moderate
amount of entropy.
IMHO. YMMV.
Ron Nicholson
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tructure as the PceNativeCall UserData68KP parameter,
as long as it's inside a chunk created by MemPtrNew, and not just a stack
local or global variable, unless your 68k compiler can guarantee 4-byte
alignment (many can't).
Ron Nicholson
HotPaw Productions
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Note that LZ compression methods are good at compressing large
chunks of data. If your records are small, you might have better
luck using a dictionary or run-length compression algorithm
that has some pre-knowledge of the characteristics of the data
contained in the records.
IMHO. YMMV.
Ron
, you can also allocate almost all of the
dynamic heap at app startup, and run your own memory allocator inside of
this chunk. Just use macro's to redirect all malloc's to your own routines.
YMMV.
Ron Nicholson
HotPaw Productions
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For information on
peak data bandwidth. Try reading about sliding
window protocols.
YMMV.
Ron Nicholson
HotPaw Productions
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single UserData pointer to pass any parameters,
synchronization flags and/or data buffers to/from the callback.
Access this structure in a "thread-safe" manner.
IMHO. YMMV.
Ron Nicholson
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rks just fine for output, but it just locks up when I try
to ask if a sound input channel is available using SndStreamCreate().
Does this mean we we need another method to check for sound capability?
(other than check for TT, Z21, TJx5, etc. ad infinitum...)
Ron Nicholson
HotPaw Productions
h
us animation could be done
under PalmOS. (Did Tapwave do anything?)
Or is the persistence of the low-power LCD's long enough to hide the
tearing artifacts?
Ron Nicholson
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out device-specific questions from
generic PalmOS application development questions.
Hopefully, someone at PalmOne is like actually responsible for
communicating with developers. A name or official contact-point,
and possibly even an introduction would certainly be appreciated.
Thanks.
Ron Nichol
request to
PalmSource and/or the OEM's to provide supported API's for such.
I'd like to see official support for reading the high resolution CPU
cycle counter(s), the display vertical refresh counter(s) if
possible, and for setting oddball serial port baud rate dividers,
for instance.
answer as to how to
avoid resource ID conflicts with other notification command
bar applications and/or with the foreground application.
Ron Nicholson
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ully automated application exists given the endian
differences between these two architectures. You best bet is to either
acquire HLL source code, to completely disassemble and rewrite the
code and libraries, or to just run the 68k code under an emulator such
as PACE.
Ron Nicholson
HotPaw Prod
abase to the
real Memo database on db open or close.
Ron Nicholson
HotPaw Productions
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On Fri, 17 Oct 2003 17:59:16, Craig Likes writes:
>Is this problem only on T3? What about Tungsten E?
Note that the T|E does not have any sound input hardware.
Ron Nicholson
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f memory out to a resource. These data resources can later be cut
and pasted into the actual application which needs them.
Ron Nicholson
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r reset or after a
power cycle).
- Does performance change after performing a HotSync?
- Does performance change after beaming over Ir, or changing the Ir
preferences?
- same question about Bluetooth...
Thanks for the fishing expedition,
Ron Nicholson
HotPaw Productions
<http://www.hotpaw
th or rate could be changing on wake-up,
and differently from after a soft reset?
Ron Nicholson
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plus globals.
There are a large number of web pages which document the IEEE
binary floating point format. Here's a random one from google:
http://pheatt.emporia.edu/courses/cs220f03/hand16a/hand16a.htm
Ron Nicholson
HotPaw Productions
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For
> AppLaunchWithCommand(sysFileCDatebook, launchCmd, launchParamsP);
Are you sure an application with the creator sysFileCDatebook exists on
a Tungsten E? Check the creator signature of the Calendar application.
If different, does that one work?
Ron Nicholson
HotPaw Productions
&l
e seen speedups of well over 50X doing this
(see my yCPUBench application) with a T|T compared with
similar code running on a Palm Vx. YMMV.
Ron Nicholson
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a complete set of "find"
criteria (text, date, completed, category, uniqueID, index, etc.)
Ron Nicholson
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developers a portable
way of searching, accessing and updating the "public" PIM data.
MemoPad and Contacts/Addresses as well.
Ron Nicholson
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art,
otherwise there may be no data in the buffer the first time your
callback is invoked. You also need some mechanism to make sure
you can keep the the buffer filled before it gets emptied.
YMMV.
Ron Nicholson
HotPaw Productions
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he routine is safe from deadlocks.
Ron Nicholson
HotPaw Productions
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Starter.prc is a good candidate. HotPaw PrefViewer can create
a dummy application with the creator ID of an orphaned preference; so
you might be able to use the resultant dummy application that as well.
Ron Nicholson
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For informa
s long as no jumps are
over 32k (use jump island subroutines in the middle if necessary).
You can also call code resources and armlets outside this first
segment for almost unlimited code space, just no global
variables.
Ron Nicholson
HotPaw Productions
<http://www.hotpaw.com/rhn/palm>
--
ems to be the most useful Windows-based
IDE for PalmOS development because it has both 68k and ARM compilers
integrated, and much better pno-let floating point performance than the
current gcc tools. But I'd much prefer to use a Mac OS X IDE if there
were a supported one available.
Ron Nichol
arameter
block to be passed in. (Minicalc and HanDBase are 2 examples.)
sysAppLaunchCmdGoTo and sysAppLaunchCmdFind are other examples
of a launch codes which includes parameters. And there are a few 3rd
party utility applications which will allow one to insert CmdGoto
parameters on a "comma
depth, network driver status, whether any OS upgrades have been
installed, background sound threads on newer models, etc. etc.
Because of this, it is important to test an application with much less
dynamic heap available than the default amount available on a clean idle
handheld after a cold boot.
& ARM optimizer performance with the other
3 choices (CW v9, arm-elf-gcc, and ADS).
Ron Nicholson
HotPaw Productions
<http://www.hotpaw.com/rhn/palm>
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w.palmos.com/dev/start/
http://www.palmos.com/dev/tools/
Ron Nicholson
HotPaw Productions
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Is there a developers forum or mailing list for the AlphaSmart Dana?
I checked their web site and couldn't find a developers link... nor
a link from the palmsource dev/support/licensee page.
Thanks.
Ron Nicholson
HotPaw Productions
<http://www.hotpaw.com/rhn/hotpaw>
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For inf
your application,
look at where it spends its time, and what its working set and
access patterns look like compared to the size of the caches,
etc. before choosing where and how to optimize.
Ron Nicholson
HotPaw Productions
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al in using all available dynamic memory.
Ron Nicholson
HotPaw Productions
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Don't forget that there is a PalmOS armlet forum, which might be a
more appropriate place for these questions:
http://www.escribe.com/computing/poaf/index.html
Ron Nicholson
HotPaw Productions
<http://www.hotpaw.com/rhn/palm>
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Which PalmOS models support turning off the display to save refresh
and backlight power while still executing application code (foreground
or background task)? Where might this be documented, if anywhere?
Thanks,
Ron Nicholson
HotPaw Productions
<http://www.hotpaw.com/rhn/palm>
-
.
> buf_ptr[I]+=V*(L1&0x8000? (L2&0x8000? 1:0):(L2&0x8000? 0:-1)
...
The 32-bit multiply inside you inner loop doesn't need to be there,
and is probably taking you over your callback time budget, which needs
to be faster than the time it takes to play out frameCount samples a
or
storage like their PC's hard disk. Without that 5 MB, it
would be like trying to run a PC with no DRAM in it.
<http://www.nicholson.com/rhn/palmfaq.txt>
Ron Nicholson
HotPaw Productions
<http://www.hotpaw.com/rhn/palm>
--Original Message--
On Thu, 29 May
How does one remove focus from a text field in a form?
(remove the blinking cursor while leaving the field viewable.)
Setting focus to a non-existent field does not work on some
of the debug simulators/emulators.
Thanks,
Ron Nicholson
HotPaw Productions
<http://www.hotpaw.com/rhn/p
application. Some sort of alarm or delayed notification
might be worth trying.
IMHO. YMMV.
Ron Nicholson
HotPaw Productions
http://www.hotpaw.com/rhn/hotpaw/
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recording from the microphone works just fine. Arm native callbacks
work if you need higher performance analyzing the sound. There's a
prototype Tungsten T sound spectrum analyzer on this webpage:
http://www.hotpaw.com/rhn/palm
Ron Nicholson
HotPaw Productions
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how often should system events be polled during a user requested
compute bound algorithm?
Thanks,
Ron Nicholson
HotPaw Productions
<http://www.hotpaw.com/rhn/hotpaw>
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ork just fine. So SrmReceiveCheck() *will* return after only
1 byte is in the buffer, but after a slight delay (a few milliseconds it seems).
It may be that the OMAP chip itself takes some time to shift incoming serial
port data down its built-in 8-byte FIFO.
Ron Nicholson
HotPaw Productions
isclaimer #3 )
And, of course, any code that is hardware specific may or will
fail on new or different PalmOS models and OS versions, so one
needs to check ones operating environment very carefully.
( end standard disclaimer #3 )
Ron Nicholson
HotPaw Productions
<http://www.hotpaw.com/rhn/h
ps, which seem
to be around 2x to 4x slower than using fp library calls. So the
fdlibm solution would still perform significantly better.
IMHO. YMMV.
Ron Nicholson
HotPaw Productions
<http://www.hotpaw.com/rhn/hotpaw>
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icense) might
work with very little modification.
IMHO. YMMV.
Ron Nicholson
HotPaw Productions
<http://www.hotpaw.com/rhn/hotpaw>
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approximations for exp() and log() might work.
I used the latter in the cbasPad5 armlet in order to keep the code smaller
and more cache friendly.
IMHO. YMMV.
Ron Nicholson
HotPaw Productions
<http://www.hotpaw.com/rhn/hotpaw>
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