Wan Zulhelmi Wan Ahmad Kamar wrote:

> Hi, I'm using a PIC18f252 with an ultrasonic transducer to receive
> signal of 40kHz.  The thing is that I want to calculate the time from
> the moment the first data arrive until the second data arrive.  How
> can I do that?

Hi Wan,

Ok, I gave you a software delay approach because that is what you decided on
in a previous post, but after the new information you posted, you don't need
a software delay after all. You can use the CCP module:

Check out Microchip's application note AN597:

AN597
Title: Implementing Ultrasonic Ranging

http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=1824&
appnote=en011066


Best regards,

Ken Pergola


_______________________________________________
http://www.piclist.com
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist