How to get system date and time into simulink?

2012 2 28
5 个回答
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更新时间：2023 12 11
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0 个投票

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

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TAB
TAB 2012-2-28
In which datatype & formate?
How you are going to use it in simulink?
Jan De Vries
Jan De Vries 2012-2-28
As integers, I'm going to use it to calculate the position of the sun (which depends on location and date/time).

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TAB
TAB 2012-2-28

3 个投票

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

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Rick Rosson
Rick Rosson 2012-2-28
eml.extrinsic has been deprecated. The new syntax is coder.extrinsic.
Sathish
Sathish 2013-6-24
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
Kaustubha Govind 2013-6-24
Sathish: Please post this as a new question along with your code.
Srikar
Srikar 2023-12-11
Can the new question's link be shared here, it shall help out many!

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更多回答（4 个）

Rick Rosson
Rick Rosson 2012-2-28

2 个投票

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
Rick Rosson
Rick Rosson 2012-2-28

0 个投票

Please try using the MATLAB Function block with the code:
function t = sysTime
t = now;
end
HTH.

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Jan De Vries
Jan De Vries 2012-2-28
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
TAB 2012-2-28
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
Rick Rosson 2012-2-28
Sorry, I forgot to include the extrinsic declaration. Thanks, TAB.
macs macalintal
macs macalintal 2016-3-7
how to call the current time only, not with the current date?
Walter Roberson
Walter Roberson 2016-3-7
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.

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Kareem Abdelgawad
Kareem Abdelgawad 2014-11-24

0 个投票

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'?

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shu
shu 2015-1-22
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
Wenbin Xu 2019-8-13
I have also encountered that problem. Is there any solutions?

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