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what is adc_timer

asked 2012-07-12 12:51:38 -0500

magdes gravatar image

updated 2012-07-12 13:13:24 -0500

Eric Perko gravatar image

In the rosserial_arduino oscilloscope example there is the following line: long adc_timer;

does anyone know what adc_timer is or how it's being used?

Thanks!

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answered 2012-07-13 19:07:39 -0500

Hi,

I've done this tutorial as well, and I don't see any use for that line in the code. I am certain if you comment it out (go ahead and try) that it will compile just fine.

The best reason I could see for something like this is to put a timestamp on the message, but you don't need a separate variable to keep track of that value, since you can simply use the nodehandle timestamp call : nh.now();

If you're interesting in adding a time stamp, you want to modify your message with a header. I had written up a similar thing on my blog that outputs the oscilloscope/ADC values in volts instead of counts, and includes the time stamp. If you're interested you can check it out here : Custom ROS Messages with rosserial_arduino.

Regards,
Doug

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Asked: 2012-07-12 12:51:38 -0500

Seen: 132 times

Last updated: Jul 13 '12