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leonghl
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Post subject: PIC18F USB Device respond time  Posted: Wed Mar 07, 2012 7:15 pm |
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Joined: Wed Nov 23, 2011 4:37 am
Posts: 4
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hello Simon, i would like to ask is it any way to test the PIC18F USB Device respond time, i mean the time taken of PC send a command to the device until the device respond to the command and send data back to PC.
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Simon Inns
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Post subject: Re: PIC18F USB Device respond time Posted: Wed Mar 07, 2012 7:47 pm |
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Joined: Thu Apr 01, 2010 6:23 am
Posts: 898
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The easiest way is probably to set up a timer in the host C# software, perform a command and then display the timer result. If you do it over 100 commands or so then it should give you a good average.
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leonghl
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Post subject: Re: PIC18F USB Device respond time Posted: Thu Mar 08, 2012 7:23 pm |
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Joined: Wed Nov 23, 2011 4:37 am
Posts: 4
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thank you for reply Simon. Beside set up a timer in C#, do you know is it any software to test the respond time with plotting graph function?
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Simon Inns
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Post subject: Re: PIC18F USB Device respond time Posted: Thu Mar 08, 2012 7:59 pm |
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Joined: Thu Apr 01, 2010 6:23 am
Posts: 898
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I don't know of any, however I believe wireshark can perform some USB logging. It may be possible to dump the USB communication using wireshark and then get the timing intervals from the output?
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