Xander

Hi Guys. Through the port-in.vi I can receive line-in audio data. Now I want to display this data realtime in a graph with the relative time displayed on the X-axis. How can I get this to work? Thanks!

Hi Pete, Thanks for your reply. I've decided to test with the parallel port. When the port doesn't suit my needs I'll decide to buy a DAQ card. Your tips are very helpfull to me, thanks for that! So currently I'm testing with my parallel port. I can toggle bits through the example program packed with labview. Now it's time to decide if I can toggle to port with a (nearly) perfect frequency. The port out.vi writes a byte at a time. Now I only want to test the response of one port. What's the best way to toggle the port(s) by a entered frequency in software? I'm not very familliar with labview, so I have to practice alot!

Hi pete, Thank you very much for your reply. I only want to toggle the ports to a frequency of 17Hz. Does labview directly toggle the ports or does windows have a driver which toggles the port. Windows works by process priorities so I don't know if I can make a stable toggle frequency.

Hi Guys, I want to drive realtime or with a known delay the outputs on a parallel port. Is it possible to drive the output ports without a extern delay caused for example by windows, or is it possible to drive the ports with a known delay? What is the highest frequency by which labview can toggle to ports?

Dear members. First I want to say I've learned alot on this forum. There are a lot of members with good knowledge about Labview. I like this forum very much and want to thank you for your help you are giving members. Please keep up the good work! My problem is as follows. I want to analyse a sine which is brought in through the audio line in on mijn soundcard. I've written a labview program which opens the audio line in and I can view the input "realtime" from the "si read.vi" VI. My signal consists of a single sine which stabilizes to zero in a period of time (say, 10ms). I would like to acquire this sine in a waveform chart so i can scroll left and right to view the sine. Next thing I would like to determine the maximum amplitude and at which X coordination it's happening. Next I would like to determine the first zero cross time of the first half period of this sine. Is there someone who can help me or give me a push in the right direction? I appreciate it alot, thanks in advance! I've added a picture for illustration.