Serial port time stamping question.

It's been a while since I've worked with MATLAB, so bear with me.

A few timing questions:

1.) What is the best way to timestamp data coming in on a serial port?

2.) What does MATLAB use to timestamp the data? Does using NTP make a difference?

Thank you for the help!

-Adam

Answer 1

[Adam]

Ended up timestamping with a NIDAQ box for high accuracy. MATLAB's not "real-time" enough.

[Walter Roberson]

I agree, that is the only feasible solution for reasonable accuracy.

Answer 2

[Hydro9 Hisz]

t=now; %serial time

[Adam]

That is time in a "serial" format. Does not answer my two questions. Where is "now" being pulled from?

Answer 3

[Hydro9 Hisz]

the now function or clock function is pulled from the system clock. If you want elapsed time between measurements without influence from the system try using the tic/toc functions with each iteration

Answer 4

[Leonard Classen]

Hi,

which NIDAQ box did you use?

best regards