Génération de trames - timing

Bonjour,
Je travail sur une application LabVIEW permettant de générer des trames bien définie. J'utilise une carte d'acquisition numérique PCIe-6536B.
J'ai mis à jour cette application de DAQ Traditionnel vers DAQ mx.
La forme de la trame est exactement celle désirée, mais mon problème est au niveau des timings.
En effet, sans que je sache d'ou celà vient, tous mes timings sont multiplié par 3.
Exemple : Je fixe la durée d'un bit à 208 microsecondes, la durée du bit généré est de 624 microsecondes. Si je fixe 100 microsecondes, il sort avec une durée de 300 microsecondes.
Sachant qu'avant la mise à jour de l'application vers les DAQ mx, les timings fonctionnaient bien, et que lors de la mise à jour, je n'ai rien modifié concernant ce point.
Peut-être avez-vous des solutions ?
Merci

J'ai essayé d'arranger un peu mon VI
Pour moi, étant donné que les seuls changements que j'ai effecctué sont au niveau de l'onglet "emission de la trame" et du sous-VI "emission de la trame", je pense que l'erreur vient d'ici.
Mon ancienne carte avait une fréquence d'horloge maxi de 20MHz, la nouvelle que j'utilise actuellement en a une de 25MHz.
Merci
Pièces jointes :
NOUVEAU VI.vi ‏97 KB
Emission trame VI nouveau (sous-VI).vi ‏16 KB

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....main()
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// test
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 Total elapsed time (ms) for HashSet: 12137
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 stop = new Date().getTime();
 long diff = stop - mark;
2. Need to save the elapsed time per 100 insertions. It can be generated by adding up the 100-insertions times. Like in the above code, the variable diff records the time per 100 insertions, and
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Theoritically, Treeset gives you guranteed O(logN) while HashSet gives you O(1) as long as you have a decent hashing algorithm. Since, you are getting the int from a pseudo-random genetor (and Integer.hashcode() returns the int value it represents), HashSet should perorm better for such large number of data.
Here is a slightly changed version of your code,
import java.util.*;
public class TreeHashPlay {
public static void main(String[] args) {
double hs = measure(new HashSet());
double ts = measure(new TreeSet());
System.out.println("ration TreeSet/HashSet: "+ ts/hs);
static double measure(Set set) {
long end = 0;
long start;
final int UP = 1000000;
Random rand = new Random();
start = System.currentTimeMillis();
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set.add(new Integer(rand.nextInt()));
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+" average time: "+(double)duration/UP);
return (double)duration/UP;
}//class ends
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impl: class java.util.TreeSet total time: 18460 total item: 1000000 average time: 0.01846
ratio TreeSet/HashSet: 1.6010407632263661
Hope it helps.

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Attachments:
3x_PWM_cyclic_V1.vi ‏40 KB
Schematics_3xLED.PNG ‏26 KB

Dear RomanP,
I'd recomend using the X series device for this application, since the STC-3 timing chip enables you to use buffered pulse trains. The idea is that you can use a FIFOto store duty cycle information for every single PWM pulse. The device will use one sample to generate one pulse, then continue on to the next one. This allows you to have three counters working at the sae time with the same clock source, but with a different pwm data (one will always do the fade-in, fade-out routine, the other two can generate a 0 duty cycle signal).
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National Instruments Hungary

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I have a weather-type animated GIF, and believe me, it is not
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http://www.sendto.org/temp/weather-cvia.gif.
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Jim Babbage - .:Community MX:. & .:Adobe Community
Expert:.
Extending Knowledge, Daily
http://www.communityMX.com/
CommunityMX - Free Resources:
http://www.communitymx.com/free.cfm
.:Adobe Community Expert for Fireworks:.
news://forums.macromedia.com/macromedia.fireworks
news://forums.macromedia.com/macromedia.dreamweaver
Anthony Bollinger wrote:
> "Linda Rathgeber **Adobe Community Expert - Fireworks**"
<[email protected]>
> wrote in message
news:[email protected]...
>> The lower the number, the faster and smoother the
animation. It needs more
>> frames to make it really smooth.
>
> Linda! Thanks for the reply!
>
> I sort of get what you are saying . . . but I guess I
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> the numbers for each frame don't work. I don't have the
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> supply frames in between the existing ones, although I
might be able to work
> up something. But let me make sure we are connecting.
>
> I think you are saying the animation takes "jumps" --
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even, although I
> have given fireworks identical numbers for each frame.
We slowed the
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> somewhere around 10 per frame and I changed it to 50,
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>
> The whole problem with this animation is that frame 2
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> the PNG file. This must be a bug with either the
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> engine, or FW. Looks like the best way to fix it is to
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> value to 50, which is just a hack. I wondered if anyone
has encountered
> this before. There is nothing wrong with the PNG file,
so this has to be a
> bug.
>
> Thanks!
> Tony
>
>

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Génération de trames - timing

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