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Screensize: 640 x 480 800 x 600 1024 x 768 1280 x 1024 UserName: Password: Format Mode: Basic  Help  Prompt  Format: Font Andale Mono Arial Arial Black Book Antiqua Century Gothic Comic Sans MS Courier New Georgia Impact Lucida Console Script MT Bold Stencil Tahoma Times New Roman Trebuchet MS Verdana   Size 1 2 3 4 5 6   Color Black Red Yellow Pink Green Orange Purple Blue Beige Brown Teal Navy Maroon LimeGreen Message: * HTML is OFF * Forum Code is ON Smilies [quote][i]Originally posted by james.kragel[/i] [br]I ran into some issues trying to trigger a stimuli script to the scanner at the 4T earlier today, using the following code. ainidaq = analoginput('nidaq',1); chan = addchannel(ainidaq,2); duration = 2; % two second acquisition set(ainidaq,'SampleRate',44100); ActualRate = get(ainidaq,'SampleRate'); set(ainidaq,'SamplesPerTrigger',ActualRate*duration); set(ainidaq,'TriggerChannel',chan); set(ainidaq,'TriggerType','Software'); set(ainidaq,'TriggerCondition','Rising'); set(ainidaq,'TriggerConditionValue',1); set(ainidaq,'TriggerFcn','scannertrigger'); start(ainidaq); wait(ainidaq,26); delete(ainidaq) clear ainidaq This method of triggering has worked in the past, but I ran into a couple of separate issues. The first is that there was an error concerning setting SamplesPerTrigger, as ActualRate was apparently not an integer value and this was causing crashes. After hard coding it to an integer, there were still issues coming up trying to set the TriggerFcn. I'm curious as to whether or not there have been hardware/software changes I am unaware of, as this has worked in the past. Thanks, James [/quote]   Check here to include your profile signature. Check here to subscribe to this topic.