How to get system date and time into simulink?

Is there a way to get the system date and time (not simulation time) into simulink?

[TAB]

In which datatype & formate?

How you are going to use it in simulink?

[Jan De Vries]

As integers, I'm going to use it to calculate the position of the sun (which depends on location and date/time).

Answer 1

[TAB]

Use below code in embedded matlab function block. It will give the date and time components as separate output.

function [Y, M, D, H, MN, S] = fcn()

   eml.extrinsic('now');
   eml.extrinsic('datevec');

   Y = 0;
   M = 0;
   D = 0;
   H = 0;
   MN = 0;
   S = 0;

   [Y, M, D, H, MN, S] = datevec(now);
end

[Rick Rosson]

eml.extrinsic has been deprecated. The new syntax is coder.extrinsic.

[Sathish]

In my project, I ve to compare my simulink pattern time and actual time.So i need to get System Date and time. While reading System Date and time, simulink shows the error as

Unsupported: structure access

Function 'Embedded MATLAB Function' (#40.40.53), line 2, column 4: "eml.extrinsic" please help to sort this issue

[Kaustubha Govind]

Sathish: Please post this as a new question along with your code.

[Srikar]

Can the new question's link be shared here, it shall help out many!

Answer 2

[Rick Rosson]

A slightly simpler version:

   function [Y, M, D, H, MN, S] = sysClock()

       coder.extrinsic('clock');
       Y = 0;
       M = 0;
       D = 0;
       H = 0;
       MN = 0;
       S = 0;
       [Y, M, D, H, MN, S] = clock;

   end

[macs macalintal]

it says error, too many output arguments, help pls

Answer 3

[Rick Rosson]

Please try using the MATLAB Function block with the code:

   function t = sysTime
        t = now;
   end

HTH.

[Jan De Vries]

Unfortunately, this doesn't work:

The function 'now' is not supported by Embedded MATLAB for code generation. See the documentation for eml.extrinsic to learn how you can use this function in simulation.

Function 'Embedded MATLAB Function' (#45.25.28), line 2, column 5:

"now"

[TAB]

Try.........

function t = sysTime

eml.extrinsic('now');

t=0;

t = now;

end

Note:

'now' returns the current date and time as a serial date number.

[Rick Rosson]

Sorry, I forgot to include the extrinsic declaration. Thanks, TAB.

[macs macalintal]

how to call the current time only, not with the current date?

[Walter Roberson]

There is no way to fetch only the time without the date. The sysClock routine that Rick showed above can be modified to discard the date portions and return only the time components.

Answer 4

[Jan De Vries]

Thanks all, works perfectly now!

Answer 5

[Kareem Abdelgawad]

I tried to use it under 'Real-Time Windows Target', but it doesn't work. Any ideas how to read system time under 'Real-Time Windows Target'?

[shu]

Me too. With the error of "The extrinsic function 'clock' is not available for standalone code generation. It must be eliminated for stand-alone code to be generated."

[Wenbin Xu]

I have also encountered that problem. Is there any solutions?