analog output non regeneration

[ThijsBoeree]

Hello again,

I got more wierd things, now it works, but it gives an error when i wait untill the generation is done. It mentions a buffer underflow. 

[Norbert_B]

Question back to you: When is a continuous output "done"????

Norbert

[ThijsBoeree]

I got it... never.

I am stuck with a hardware buffer of 4096 samples, so in order to get a pauzing mechanism in i upped my analog output sample frequency to 4096, now the pause takes about 1200 ms... I also redesigned the whole thing and put an extra loop at the back with a node checking if TotalSampPerChanGenerated, when that goes to zero then it can stop the analog output, i only have to catch an "underflow" error there.  Now i understand why it works with you simulated device, it has no hardware buffer.

[Norbert_B]

If you require an immediate pause of ao at *any* time, you might want consider to use external clocking via a counter. Configure the counter to generate the pulse train and configure a pause trigger for it.

Please note that, depending on the general setup, you can receive timeout errors while pausing output.....

Norbert

[ThijsBoeree]

Do i need to hardwire a counter to an input then?

Regards,

Thijs

[Norbert_B · Accepted solution]

No, you can use an internal connection. If you want to configure that, you should configure an DAQmx Terminal control to display Advanced Terminals in the IO filtering.

Norbert

[ThijsBoeree]

Euhm... can you send me a little example? Or is there an example in the example finder?

[ThijsBoeree]

I know what i have to do but i don't know how exactly (PS, thank you very much for all the effort you are putting into this!)

I have to pause the outputbuffer and also stop the filling the buffer at the same time (the last thing is easy). Then when i resume, i have to start reading the buffer again and also fill it to complete the rest of the generation. I'm already searching for solution to hold the buffer and i know i have to use some sort of trigger... but exactly how? I don't know yet...

Regards

[ThijsBoeree]

I almost got it!! There was a realy good example on the forum and i am redesigning it to my needs... It is this example:

[ThijsBoeree]

I figured it out and it works! There's still some work to do, i would also like to pause in when the last loop is running, or somehow eliminate this whole loop...