Multifunction DAQ
DAQmx Digital Write from Digital Trigger
Hey guys,
So I have a DAQPad6015 and I want do something that seem straightforward even though it might be a bit atypical use of the board. Essentially I have a 1Hz TTL signal that is triggering my camera but I dont want it to trigger everytime just in case the other parts of the experiment isnt ready.
So I am inputing the 1Hz TTL into a digital input and after all the other parts of the experiment is done moving, I want to start listening to the digital input and and send out another TTL signal from a different channel to the camera. Phase is very important in my experiment so I want the 1Hz signal to be continously running while triggering off of this signal only when everything is ready.
There is already an example VI that goes this: Gen Dig Pulse Train-Finite-Dig Start.vi
But I cannot use it because I am already using up all the Ctr out lines for other parts of the experiment so I was hoping to do essentially the same thing but with a write to a digital line (true write followed by a false write) instead of the ctr out. I have attached the vi I wrote. Essentially the vi works if I remove the DAQmx Start Trigger vi. Maybe I need to use the sample clock vi? I would appreciate any advice on this.
In theory I don't know why DAQmx would not support this... I already called NI once but the technician told me it simply doesn't work... not very helpful so I thought I'd give you guys a try
since I've already learned a lot from the forums so far.
So I have a DAQPad6015 and I want do something that seem straightforward even though it might be a bit atypical use of the board. Essentially I have a 1Hz TTL signal that is triggering my camera but I dont want it to trigger everytime just in case the other parts of the experiment isnt ready.
So I am inputing the 1Hz TTL into a digital input and after all the other parts of the experiment is done moving, I want to start listening to the digital input and and send out another TTL signal from a different channel to the camera. Phase is very important in my experiment so I want the 1Hz signal to be continously running while triggering off of this signal only when everything is ready.
There is already an example VI that goes this: Gen Dig Pulse Train-Finite-Dig Start.vi
But I cannot use it because I am already using up all the Ctr out lines for other parts of the experiment so I was hoping to do essentially the same thing but with a write to a digital line (true write followed by a false write) instead of the ctr out. I have attached the vi I wrote. Essentially the vi works if I remove the DAQmx Start Trigger vi. Maybe I need to use the sample clock vi? I would appreciate any advice on this.
In theory I don't know why DAQmx would not support this... I already called NI once but the technician told me it simply doesn't work... not very helpful so I thought I'd give you guys a try
since I've already learned a lot from the forums so far.
