What happens when you replace samples in mode analog output buffer?
I have a sequence of output voltages that I need to update all the 1/60th of a second. Each sequence must remain synchronized to a trigger external and controlled by an external clock. The program is in c ++.
These are my steps to configure the task:
(2) DAQmxSetWriteAttribute: DAQmx_Val_DoNotAllowRegen
(3) DAQmxCfgSampClkTiming: DAQmx_Val_FiniteSamp (and fix the external clock signal)
(4) DAQmxCfgDigEdgeStartTrig: The front of my external trigger
(5) DAQmxSetTrigAttribute: DAQmx_StartTrig_Retriggerable
If I write too slow samples, I get the following message:
"The production has stopped to prevent the regeneration of old samples. Your application could not write samples in the back buffer fast enough to prevent the former samples of regenerated. »
I understand this message and this is the behavior I want.
My question is: what happens if I write the new samples to fast, i.e. before the previous one, who have been posted on the output channel? This will give me an error or software allows me to crush the samples in my output buffer?
I'll echo what others have said here. DAQmx won't let you write samples in the buffer until there are enough empty space to make it--and that's why the entry on the function DAQmx Write time-out.
There are two ways to go about writing only when the buffer is ready for the next set of data:
- Use the timeout to write DAQmx directly. Do not forget that this blocks however.
- Use the DAQmx software event "Every N samples transferred from the buffer". This tutorial gives a good introduction to the DAQmx software events and this forum thread goes through a few considerations to keep in mind.
PS - If you use the C API, use the DAQmxRegisterEveryNSamplesEvent function to register this callback.
Tags: NI Hardware
What happens when you get suspended communities of Apple support?
can someone explain what happens when you get suspended communities of Apple support?
Read section 5 violation of the agreement to the Convention for the use of Apple Support communities
What happens when you reinstal XP OS with the cd that takes me to service pack 2 and I'm at service pack 3
I bought TurboTax and downloaded, but can I have downloaded previously because I was unable to install due to the previous installation. After that 2 hours of phone support with TurboTax including screenshare, they stated that the problem lies in the registry. It was damaged and I had to reinstall my OS.
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I finally found my OS reinstall CD, but it's waaaay above my comfort level... what I do now.
Frankly, if TurboTax is causing this much trouble, I would use another company as the income tax act.Of course, you can reinstall Windows. It's a shame, if that's the only way to solve this problem. :-(For later use, it is sometimes necessary to download the installation file, physically disconnect from the Internet, set up a clean boot (using msconfig startup diagnosis), reboot and THEN install the large program (and then undo the clean boot, reboot and re-connect to the Internet).
What happens when you restore a backup of a Bitlocker encrypted drive?
What happens when you restore a backup of Windows (disk image) made from a Bitlocker encrypted drive?
I use Bitlocker on the drive of my BONES and my data disks. It will be a complete restoration to its original state encryped or something else?
I use the TPM module, but the USB key with the key. Thanks for your time. HAL
The answer to your questions is in the following article: http://blogs.technet.com/filecab/archive/2008/04/29/complete-pc-backup-vista-and-vista-sp1-windows-server-backup-longhorn-server-and-bitlocker-faq.aspx.
I hope this helps.
Lorien - MCSA/MCSE/network + / has + - if this post solves your problem, please click the 'Mark as answer' or 'Useful' button at the top of this message. Marking a post as answer, or relatively useful, you help others find the answer more quickly.
good night, is that what happens when you open cloud creative design I check your email and get the following email (<; deleted by the moderator >;) and let my id or enter gives me more options
good night, is that what happens when you open cloud creative design I check your email and get the following email (< deleted by the moderator >) and let my id or enter gives me more options
Follow please: address error to connect to Creative Cloud Desktop, Email how to pass my e-mail? and CC has a fake email, can not change
What happens when you enable paging in the range?Hi all
Recently, I started tuning VO potentially able to return a lot of data. Explore the documentation I've read on the beach of paging:
section http://docs.Oracle.com/CD/E16162_01/Web.1112/e16182/bcadvvo.htm#BCGHDDAD "42.1.5 scroll efficiently with large result sets using range paging"
Section "126.96.36.199 What happens when you enable paging in the range" tells us that the thrust is enveloping the original query to produce a Top - N query like this
Oracle, told us http://docs.oracle.com/cd/B19306_01/server.102/b14200/statements_10002.htm#i2171079
The actual query produced to wrap a base query of: SELECT EMPNO, ENAME, SAL FROM EMP looks like this: SELECT * FROM ( SELECT /*+ FIRST_ROWS */ IQ.*, ROWNUM AS Z_R_N FROM ( SELECT EMPNO, ENAME, SAL FROM EMP ) IQ WHERE ROWNUM < :0) WHERE Z_R_N > :1
Use the ORDER byclause order the rows returned by the statement. Without an order_by_clause, there is no guarantee that the same query that is run more than once will retrieve the lines in the same order.
So, it seems that we can ignore certain lines of original request?
The example below illustrates this situation.
In the first query, we lost name4 in second name1.
SQL> SQL> create table tst( 2 id number 3 ,name varchar2(100) 4 ) 5 / Table created SQL> insert into tst(id,name) values(1,'Name1'); 1 row inserted SQL> insert into tst(id,name) values(2,'Name2'); 1 row inserted SQL> insert into tst(id,name) values(3,'Name3'); 1 row inserted SQL> insert into tst(id,name) values(4,'Name4'); 1 row inserted SQL> SELECT 'Page1', ID, NAME FROM ( 2 SELECT /*+ FIRST_ROWS */ IQ.*, ROWNUM AS Z_R_N FROM ( 3 SELECT ID, NAME FROM tst order by dbms_random.random 4 ) IQ WHERE ROWNUM < 3) 5 WHERE Z_R_N > 0 6 union all 7 SELECT 'Page2', ID, NAME FROM ( 8 SELECT /*+ FIRST_ROWS */ IQ.*, ROWNUM AS Z_R_N FROM ( 9 SELECT ID, NAME FROM tst order by dbms_random.random 10 ) IQ WHERE ROWNUM < 5) 11 WHERE Z_R_N > 2 12 ; 'PAGE1' ID NAME -------------------------------- ---------- -------------------------------------------------------------------------------- Page1 1 Name1 Page1 2 Name2 Page2 3 Name3 Page2 2 Name2 SQL> SELECT 'Page1', ID, NAME FROM ( 2 SELECT /*+ FIRST_ROWS */ IQ.*, ROWNUM AS Z_R_N FROM ( 3 SELECT ID, NAME FROM tst order by dbms_random.random 4 ) IQ WHERE ROWNUM < 3) 5 WHERE Z_R_N > 0 6 union all 7 SELECT 'Page2', ID, NAME FROM ( 8 SELECT /*+ FIRST_ROWS */ IQ.*, ROWNUM AS Z_R_N FROM ( 9 SELECT ID, NAME FROM tst order by dbms_random.random 10 ) IQ WHERE ROWNUM < 5) 11 WHERE Z_R_N > 2 12 ; 'PAGE1' ID NAME -------------------------------- ---------- -------------------------------------------------------------------------------- Page1 4 Name4 Page1 2 Name2 Page2 3 Name3 Page2 2 Name2 SQL>
Who can shed some light on this?
Everything is so sad I think, and I should wait for unpredictable data? Or the internal mechanisms are not as described in the documentation and everything works well?
Thank you very much.
So what is your question? Without a deterministic order by, the top - N query used by the pagination of range feature will not do what you want. It can skip lines. It can reproduce lines on several pages.
The documentation is correct; things are working properly. The other thing that should be obvious is that if the records are inserted in the game of records and committed between your look a page 1 and page 2, the specific records that appear on page 1 page vs 2 could change.
What happens when the database in backup Mode?Hello
What happens when we kept the database in backup mode, by using the command "Alter database Begin Backup" means;
OK, now my query is whether Oracle freeze the data file header and information is stored in the log file of restoration by progression. So if my backup job continues for 30 min and at the same time someone did some update of database, then how these updates to the information written back to the data file after "Alter Database End Backup'.»
Oracle only blocks data file headers, no body. Modified blocks will be stored in data files (at control points) even in backup mode.
If checkpoint has not arrived yet after this update and validation, and DB has decreased, then when it will start it will redo-log automated recovery.
Published by: user11181920 on Sep 21, 2012 11:54
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What exactly happens when you click on "Restore hidden updates" in the Control Panel, Windows Update.
It gives you the opportunity of hidden updates back to the visible update list.
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What happens when you insert/modify/delete a row in a table - concepts
I am trying to understand the below concepts regarding the internal concepts (for example, undo and redo)
(1) what is happening in the database when you insert a row in a table?
(2) what is happening in the database when you update a row in a table?
(3) what is happening in the database when you remove one line in the table?
I have read the oracle documentation and mistook the redo and undo behavior. It would be great if someone explains the concept in a simple way. I'm a novice programmer to understand database concepts. Any help would be much appreciated.
INSERTIONS and deletions are handled the same way. The cancellation of an INSERT is a DELETE. The cancellation of a REMOVAL is an INSERT.
Therefore, the generation 'Cancel' for INSERTION is less than that of a DELETION (because the cancellation of a DELETION is to reinsert the line - the value of each column in the row must be captured in the undo).
If restore you an INSERT, then Oracle executes effectively a DELETE tablename WHERE rowid =... rowid_that_was_inserted. A cancellation for an INSERTION is 'rapid '.
If restore you a DELETION, then Oracle executes effectively an INSERT tablename values (col1, col2, coln). The cancellation of a DELETION takes more time because Oracle would have to re-enter the values.
Remember that Oracle also captures the redo to undo it (and do it again for the price drop if you do a restore).
Hemant K Chitae
What happens when you disable and remove iCloud library after 30 days?
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What happens exactly when I publish using both formats? The support of the browser will be detect and launch and give more consistent training?
I'm also curious of the best practices used by third parties.
Any help is very appreciated,
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["blackberry", "android", "iphone", "ipad", "symbian", "smartphone", "ios", "windows this webos","" "];
When buying creative cloud as a student, what happens when you graduate will have a few more months remaining on your CC membership? What is the price goes up?
I think to have bought the cc adobe as a student, I just need confirmation on the pricing. Thank you.
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What happens when you exclude a page published in muse adobe?
I don't want this page up-to-date with the muse of adobe. I want to update directly in BusinessCatalyst in Developer I want however to other pages using the muse of adobe. Is this possible? I don't want the registration page that has other jqueries and code to receive updates from adobe muse which may cause it to change its configuration.
When you disable the export option page it deletes the page of catalyst for the company.
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Would be very nice if those who receive assistance success would actually mark their answers questions. In short time I did this, I would say 50% of the time responses are never marked as such and thus appear to stay open as long as active questions, even if the author of the question got what they want. It wastes the time of volunteers who try to help you here.
Play just the guy if you want technical assistance free by experts that you would normally pay $50 upward, at least you can do is Mark answers as correct and give a thank you. If you do not you just doesn't help you the next time that you need - at least to myself.
The problem is that your target audience visits only when they need help and then not to visit the forum again until they have a problem. If they don't read this thread, or realize they should mark accurate judged responses. Most of the threads that are marked as correct is done by one of the mods forum, or they mark them as assumed answered, which also puts the green check against the thread. Really fun is when the OP marks one of its own messages as correct, but they don't get all the points when they do this.
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