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vrf Non-continuous write to files.

Question asked by VRFuser on Jul 28, 2002

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Jeffrey,

Set a variable, let's call it TimeStart with now() and another variable
let's call it WaitTime equal to 600.

Each loop, test if now()-TimeStart>=WaitTime. If it does, write to disk
and add 600 to WaitTime. If not, do nothing.

This should write every 10 minutes as you requested.

Mike Groves
Cree Microwave

-----Original Message-----
From: JCain@semtech.com [mailto:JCain@semtech.com]
Sent: Friday, July 26, 2002 6:32 PM
To: vrf@lvld.agilent.com
Subject: vrf VRF: Non-continuous write to files.

Hello,

Curious to know if anyone could suggest a simple solution to "writing
to my files every 10 minutes (600 seconds)" without stopping the rest of
the program execution. Please find my small simple program attached.

(See attached file: Burn-in_1_JC.vee)

Warm Regards,
Jeffrey Cain

Applications Engineer
Semtech, San Diego - Test & Measurement Div.

No one else has this question

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2 Replies

VRFuser Jul 26, 2002 3:32 AM
Mark Correct
Correct Answer
Hello from Gregg C Levine
Funny you should mention that. I did see that missing from that mail
message as well. I wonder why. It might be a list server thing. An
airshow at Moffet field? Wow.. I'd like to be there, that's one of the
original research entity's bases. That's NACA for all of you. It's also
an NAS-Naval Air Station, as well.
-------------------
Gregg C Levine hansolofalcon@worldnet.att.net
------------------------------------------------------------
"The Force will be with you...Always." Obi-Wan Kenobi
"Use the Force, Luke." Obi-Wan Kenobi
(This company dedicates this E-Mail to General Obi-Wan Kenobi )
(This company dedicates this E-Mail to Master Yoda )

> -----Original Message-----
> From: owner-vrf@lvld.agilent.com [mailto:owner-vrf@lvld.agilent.com]
On Behalf
> Of Mike Groves
> Sent: Friday, July 26, 2002 5:25 PM
> To: VEE Reflector (E-mail); Kathy Kiessling
> Subject: RE: vrf RE: Terrible tabs revisited
>
> Kathy,
>
> Now that you mention it, you're right. We always did that out of
> courtesy on the earlier version of the reflector, but I thought
> this version was supposed to do that for you.
>
> I changed my email address a while back, but I see this was happening
> even before that. Interesting...
>
> I guess I'll have to remember to manually include it until they
> figure out why.
>
> Mike Groves
> Cree Microwave
>
> I thought there might have been some truth in your post, Jeff. Just
> as I was reading it, 2 FA-18's screamed by overhead. Looks like they
> are getting ready for an air show at Moffet Field tomorrow.
>
> -----Original Message-----
> From: Kathy Kiessling [mailto:kathy.kiessling@endwave.com]
> Sent: Friday, July 26, 2002 1:46 PM
> To: VEE Reflector (E-mail)
> Subject: vrf RE: Terrible tabs revisited
>
>
> Often times, vrf does NOT put 'vrf' in the title, making it harder for
> outlook to sort out this mail. Interestingly, this mostly happens
with Mike
> Groves' postings.
>
> Kathy Kiessling
> Endwave Test Engineering
> (530) 295-4055 ph <-- new
>
> -----Original Message-----
> From:      Mike Groves [mailto:Mike_Groves@cree.com]
> Sent:     Friday, July 26, 2002 1:35 PM
> To:     VEE Reflector (E-mail)
> Subject:     Terrible tabs revisited
>
> << File: Tab2.vee >> Hello VRFers, Happy Friday!
>
> About 6 months ago I reported a bug that involved using a TAB
character
> (     ) to align data on a Logging AlphaNumeric display. It was useless
as
> the TAB would align itself to the underlying grid instead of the
Logging
> Alphanumeric box. Meaning, if you moved the box slightly, the tabs
would
> shift their positions pushing your data around.
>
> Well today I found another instance of this same problem, this time
with
> the output pin of a formula box and also the wire connecting it to the
> input of a regular AlphaNumeric display.
>
> See the attachment for details.
>
> I would be curious if anyone running VEE 6.1 (or the demo) could
report
> if this occurs there also.
>
> Thanks,
> Mike Groves
> Cree Microwave
> ---------------------------------------------------------------------
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VRFuser Jul 27, 2002 11:20 PM
Mark Correct
Correct Answer
Have look at your program breifly. You could try to use a saperate thread
only for writing to file every 600sec and one thread for your main program
execution. You can use the OnCycle object to repeat the thread every 600sec
on your writing thread. I find that by using the OnCycle object rather than
using the UntilBreak object, you can save a lot of CPU time excuting your
program.

One possible problem you might face is the synchronisation of both of the
threads (accessing a variable or wiritng when data is not available might
cause error). The way I solved the problem is by using global variable
(usially called flags) to control when should the writing thread start
writing. The main thread will be responsible in setting/re-setting the flag.
When the flag is set, the writing thread will loop into the writing and visa
versa. Before the program exit, the main thread will be responsible to
"exit" the writing thread first (again by using a flag).

hope this help.

yawbang

> -----Original Message-----
> From: owner-vrf@lvld.agilent.com [mailto:owner-vrf@lvld.agilent.com]On
> Behalf Of JCain@semtech.com
> Sent: 27 July 2002 02:32
> To: vrf@lvld.agilent.com
> Subject: vrf VRF: Non-continuous write to files.
>
>
> Hello,
>
> Curious to know if anyone could suggest a simple solution to "writing
> to my files every 10 minutes (600 seconds)" without stopping the rest of
> the program execution. Please find my small simple program attached.
>
> (See attached file: Burn-in_1_JC.vee)
>
> Warm Regards,
> Jeffrey Cain
>
> Applications Engineer
> Semtech, San Diego - Test & Measurement Div.

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