LabVIEW FPGA Sine Wave Generator Reset Input Behavior

I would like to know what the output from the Sine Wave Generator express VI is while the reset input is true, and what happens to the output immediately after the reset input is set false.
I need to generate a regular sequence of positive half-cycles of a sine wave, with an arbitrary delay between them that is not related to the actual frequency of the sine wave. So my plan is basically to periodically fire a trigger in the fpga software that resets a sine wave generator and directs its output to an analog output until the sine wave goes negative, at which point the analog output is set to 0 until the next trigger.
Thanks

Muchas gracias por responder steve.bm
El problema que tengo es el siguiente, estoy desarrollando un proyecto en el cual uso los conversores DAC y ADC de la tarjeta FPGA Spartan 3E para lo cual use como base el proyecto que esta subido por la NI que se encuentra en uno de los enlaces que me dejaste,( Lesson 8 - Linking Existing VHDL Code from WebPACK into LabVIEW FPGA) del mismo solo modifique para usar el ADC y el DAC mediante el cual adquiero una señal senosoidal y la tengo que reconstruir, el problema es que como uso un generador de señal de laboratorio al ingresar la frecuencia de muestreo para obtener una buena reconstruccion, la frecuencia se baja lo cual en el proyecto real no podra pasar ya que la frecuencia ya en proyecto final la adquiero de la red electrica publica pero ahora para pruebas estoy con un generador, la verdad no se que pasa porque tiene un retrazo la señal.....
Te parece si te puedo dejar mi proyecto subido en enlace para que lo revices ??

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FPGA sine wave generator

NI工程師你好
我在FPGA端使用sine wave generator
可是出來的波形卻不是一個完整的Sin波圖形
可以請工程師幫我解答一下嗎??
已解決！
轉到解決方案。
附件:
sin.png ‏10 KB
sin-1.png ‏13 KB

好吧，我認為問題可能是您使用的圖表上的FPGA。不幸的是，LabVIEW的通信方式，有時會導致與 FPGA圖表更新不當，因為他們目前沒有時間同步的時間在芯片上。我組建了一個簡單的應用程序，而不是傳輸分回的主機和波形似乎是正確的。讓我知道這是否有助於。
附件:
Sine.zip ‏317 KB

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Bonjour,
Content de vous rejoindre sur ce forum. Tout nouveau en Labview (pas très à l'aise avec certaines notions), je voudrai soliciter votre aide. En fait, je veux créer une impulsion de 100Hz avec la fonction " Sine Wave Generator" de FPGA. En simulation j'ai réussi mais dès que je compile en target il m'affiche ce message : "Top-level clock rate does not match rate for which the Sine Wave Generator VI was configured. Reconfigure the Sine Wave Generator or the top-level clock so that their rates match. You also might need to modify computed values for the frequency (cycles/tick) input."
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burst sine_40MHz.png ‏336 KB

Bonjour M2IM,
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En mode FPGA target, la vitesse est plus élevé et donc uniquement certains points du sinus seront afficher mais le signal electrique lui sera bien un sinus.
Je t'invite à regarder le lien ci-dessous qui reprend quasiment la problématique que tu rencontres:
Generate a sine with LabView FPGA and connect it to an AOModule
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I am also having this issue and have not been able to find a solution in the forums. I am somewhat of a rookie so pardon me if I seem ignorant in any way. I am working on a graduate project where I need to produce some sine waves and I am getting more of a square wave when I output it and measure on the scope. The program I am running is quite simple at the moment to attempt to discover any errors by process of elimination. I have the sine wave generator in a while loop outputting to an AO port. I am using the cRIO 9022 with the 9269 AO module. I will attach screen shots of my code and my oscope image
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1... Adding an unrelated question to a 3-month old post is not the best way to get your questions answered.
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Synchronizing 2 sine waves

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Attachments:
test sine wave generator.vi ‏45 KB

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(b) Use the same clock for both modules. I do not know whether these devices have a connection for an external clock. If they do not, you will never get perfect synchronization. Somewhere you will need to configure subVIs to tell the modules what clock to use.
2. The Amplitude slider will be read only once at the beginning of your program. That value will be used throughout the run. Any changes made later will be ignored. This is due to LabVIEW's dataflow paradigm.
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3. Same as 2 for Frequency.
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Sine pattern and sine wave VI

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Regards

The amplitude input is without units. For example, if you specify 3, then the sine wave values will be from -3 to 3. If you want mm, there must be some kind of conversion. When you say mm, how does this relate to the sine wave? Are you generating a sine wave voltage signal that drives a motor or other actuator that moves a device by a number of mm? Of so what is the relationship between voltage and the mm displacement generated by your actuator?
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Christian L
Christian Loew, CLA
Principal Systems Engineer, National Instruments
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Unable to generate sine wave

Hello everyone!
I am currently working on my Bachelor project at a company. i am stuck with a problem.
I have designed a labview program for vibration test system. I have used cRIO 9076 as the controller with NI 9263(as D/A) and NI 9234(as A/D).
The loop works as follows. the input is given from the labview program. it is then sent to the cRIO. the output of CRIO(that is output from NI 9263) is given to the amplifier. the vibration shaker vibrates based on the input from aamplifier. then the accelerometer detects the vibration and sends it to the NI 9234 and loop repeats iteratively. since i have designed a sweep sine vibration system, the output of cRIO is a square wave. it should be sine wave.
the probelm is i am getting a square wave as output from my NI 9263 which should be a sine wave output. I have two subVI where i use nominal to binary convertor(for NI 9234) and binary to nominal (for NI 9263) as calibration mechanism.
the question is where have i went wrong? what should I do to get a sine wave?
PS: on searching NI i found out some formulas (to generate sine wave) and designed a FPGA and LabVIEW program to generate a simple sine wave and got a sine wave. if that formulas is to be included where should i include that?
Thanks in advance.
Regards,
Vishal.

Without seeing your current code, there is no way we can even uess as to why you are creating a square wave instead of a sine wave.

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Now the long version of the problem. I have a 9-bit absolute encoder connected to a motor shaft (up to 420Hz). From the encoders 9-bit (0-511) parallel signal I need to create a synchronized 6X sine wave (up to 2500Hzwith an adjustable phase relation. Picture an electronic timing chain. For every cycle of the encoder, I need to produce six full sine wave cycles with a variable tuned phase shift. I have LabView 7 w/RT.
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Phil,
Another different option to solve your application would be to use the new LabVIEW FPGA module and the 7831R reconfigurable I/O hardware. Using these tools you can configure the FPGA on the board to generate the sine wave based on the 9-bit parallel input. The most simple setup would be to have a lookup table in the FPGA that has a corresponding output value to each of the 512 possible input values. This 512 sample table would contain 6 cycles of a sine wave. Every time the parallel input changes the analog output value would be updated accordingly from the lookup table. This setup would also allow to easily add a phas
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Christian L
NICS
Christian Loew, CLA
Principal Systems Engineer, National Instruments
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Any attached Code is provided As Is. It has not been tested or validated as a product, for use in a deployed application or system,
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to the Sample Code License Terms which can be found at: http://ni.com/samplecodelicense

How can i do a sine wave with High Throughput Sine for fpga?

I try to do a sine wave looking the examples but i can't. I have a sbRio 9606.
I need to do a sine wave with high throughput block. In my exercise i have 2 inputs (amplitude and frecuency) and i have to look the output (sinewave)
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Hi pablosan,
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Regards.

LabVIEW FPGA Sine Wave Generator Reset Input Behavior

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