I need to control my Sony camcorder through the LANC connection. Right now I can control the camera by way of Tera Term, through the computer serial port, through a Sony LANC controller board, to the camera. I would like to build a program in LabView where I can click on buttons to control the camera through the serial port. Example: power on; zoom in; zoom out; etc... I know the commands to control the camera because I type them in, in Tera Term. How do I associate the commands to buttons in LabView to execute the commands? Thanks for your help.

Before there was an event structure, everyone had to use a while loop with a case statement. With each iteration of the loop, the value of the control wired to the case statement had to be read. This was/is called polling and used quite a bit of computer resources. With the event structure, nothing runs until an event actually happens - no polling and the computer resources used are minimal. The event data node returns different information depending on the event and the control that is firing the event. In the example you mention, the NewVal is wired to the case structure. This is the same thing as wiring the control but in some cases, the control might be located in a different event. You can have a single event fired for multiple controls and in that case, you might want to use the CtrlRef (control reference) to determine the actual control. There are a lot of possibilities. The radio button is an enum. The case statement have to match the enum values. Those are not visible in the example. Right click on one of the controls and select Visible Items>Label. If you change that, you will see the value in the case statement change. In order to send hex, you can simply right click on your string control/constant and select 'Hex Display'. You can also use the Typecast and Byte Array to String. This question has been asked and answered hundreds (perhaps thousands) of times and there that many example programs attached to those posts. Do a search.

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Home Community Discussion Forums Most Active Hardware Boards Instrument Control (GPIB, Serial, VISA, IVI) Topic

Instrument Control (GPIB, Serial, VISA, IVI)

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I need to control my sony camcorder through the LANC connection

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Re: I need to control my sony camcorder through the LANC connection

howzz

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‎02-25-2010 12:18 PM

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I see what you are saying now. I'll make sure I do that in the future.

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Re: I need to control my sony camcorder through the LANC connection

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‎02-25-2010 01:04 PM

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zaah1,

Here is a website with the different types of LANC connectors. http://www.boehmel.de/lanc.htm . What I did in order to communicate with the camera from the computer was buy a LANC controller board. I got some of my questions answered in this forum, but I still have plenty to figure out with the LabView program.

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