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I have a question about the scheduling of RTOS, assume I have 10 tasks, each task consumes 3 ms cpu time.
And each task has the folloing structure:
xxTask() {
,,,,
While(true) {
delay(50ms);
Statement 1;
do task things;
Statement 100;
}
}
My question is, if there were no interrupts, only tasks exists in the context, is the scheduling rule of RTOS let each task run a whole loop? i.e, from statement1 to statement 100. Assume all tasks have the same priority, and they are started at the same time.
is there possibility the task runs like:
task1: statement1...statement50; -> task5:statement20 ... statement96; -> task10:statment90->statment100;
that is to say, undetermined, for example: sometimes, one task can run a whole loop, from statement1 to statement100; sometimes, one task run from statementXX to statementYY;
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hi all,
I am sending sms by phone using at command, in TEXT mode,
but there is a problem some characters are not send by some phone, and message not receive.
can I know this before sending the text message ,to skip these characters to send message successfully.
please help me for this.
thanks.
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I'm looking at possibly developing an application that pushes emergency alerts to specific users. I've seen a number of solutions available for purchase, but nothing quite fits the entire list of what we want, plus it will have to be cross-platform. So while SMS would be the easiest delivery method, I am unaware of any way to make an SMS message which appears in the method we desire.
Most of the requirements they have are easy enough and are things I have done in the past. The problem I am having is creating alerts that are pushed to the device that override anything else the user is doing, outside of using it to make a phone call. This will be used for true emergencies, not kittens up trees. So not a normal push notification.
Anyone in the US who has a smart phone that lives in an area with inclement weather has likely gotten the alerts from the National Weather Service, advising of tornadoes, floods, etc. Which pop up and take up the entire screen with the alert, information about what is going on, plus make noise until you acknowledge the alert, or a predetermined amount of time has passed. At which point the noise stops but the alert retains focus. Even if the screen goes into hibernation, the alert remains when you turn it back on.
I haven't found any documentation on how to do this. Does anyone have any experience with this level of push alert or any idea where to start looking for how to do so? My luck with Google has provided some examples, but nothing quite right. I want this to be mildly obnoxious, impossible to miss, and require user feedback to go away. We want to make certain the user sees the alert.
Thanks in advance.
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Hello, i plan on building a mobile app using html/javascript with mosync. The app needs to connect to an asp.net webapplication i have and retrieve data from it's database(Ms Sql Server 2012).
I do not know if that is possible thus i am hoping someone can please shed some light on how i can do this.
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Dear Member 9465564
I actually worked in project like you ask and no problem there.
you make the site make DB and try it worked fine..
all you want to do that the mobile must connect to same network with your web server and enjoy.
emm some problem you face the web site re-size in mobile phone devices..
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So basically in the mobile app i change the host name in the db connection to that of the website instead of using 'localhost' like i normally do. Is that what you are saying?
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Hello,
Member 9465564 wrote: The app needs to connect to an asp.net webapplication
In that case you do not need to connect to the web application's database. Further in a poduction environment nobody is going to expose the database in a such a way that it can be directly accessed over internet. The best way to access the data is to create the web services and access those. Following CP articles will get you started in creating web services.
Regards,
Prasad P. Khandekar
Knowledge exists, man only discovers it.
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Okay thanx alot, i'll read on that then. 
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i am developing android Dictionary Application.. i Required SQLite based Dictionary for android ... Any one Plzz who can help me....
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Hello,
Here are few articles which will get you started.
Regards,
Prasad P. Khandekar
Knowledge exists, man only discovers it.
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I m new to android application development. How can i fetch information from database in listview in the tab framework. please help me thannks..
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Hello,
I think following articles will help you in learning database APIs for mobile/tabs platform.
Regards,
Prasad P. Khandekar
Knowledge exists, man only discovers it.
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THANK YOU VERY MUCH FOR YOUR SUGGESTIONS.
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Hi all,
I am using at command to send sms using GSM modem,
I have one problem when I send sms usin PDU mode,than switch to Text Mode or vice versa, CMS error 304 and 305 occur,
to change PDU mode and Text mode using CMGF command
I really don't understand where I am wrong .
please help me how can I solve this.
thanks.
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I'm reading an eBook.
I think the software is screwing things up.
i.e., what I see on my screen can't be right.
The endpoint descriptor stored in the device specifies the maximum latency period. For low-speed devices, the maximum latency can be any value from 10--255 ms. For full speed, the range is 1--255 ms. for high speed and SuperSpeed, the range is 125 Ms to 4.096 s in increments of 125 Ms. In addition, a high-speed or SuperSpeed interrupt endpoint with a maximum latency of 125 Ms can request 1, 2, or 3 transactions per interval.
I'm assuming that that capital "M" character is supposed to be the greek "mu" letter, i.e.,
(10)**(-6) or (I hope I count the zeros properly) 0.000125 seconds.
Somebody tell me yes or no. I think the number is supposed to be 125 MicroSeconds.
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Thank you.
I Saw that,
From the USB.Org site: Universal Serail Bus Revision 3.0 Specification[^] (.zip file format, size 23.7 MB)
The file size alone is very intimidating.
I'm reading the book by Jan Axelson. I welcome the suggestion(s) of anyone who really understands the signals and protocol of USB.
i.e., Am I going to have to read 27 MB of PDF files in order to write the code to send one byte successfully across a USB connection ?
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The ZIP archives contain a lot of PDF files. The USB 2 and 3 specification files itself are about 5 to 7 MB. If you are not going to write your own USB driver, you normally don't need the specs. Just have a look at the driver interface documentation. An example would be the MSDN page USB_ENDPOINT_DESCRIPTOR structure[^] which also answers your initial question.
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Tell you what, I'm going to take this conversation over to the Hardware & Devices[^] forum. I asked some questions about that before over there. Seems like the right place.
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Incidentally, is this the best forum on CodeProject for asking USB questions ?
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No. I think Hardware & Devices would be better.
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gud morning... i've faced a problem when i activate a "call wating" service on my sim/mobile... its activates but the problem is that when another caller calls me.. and i want to merge both the call , my mobile gives the error " unable to switch calls/ unable to confrence call" here are the attechments... i m waiting for your rply
Thanking You
Arsala
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Hello,
Why not get in touch with the support center of your mobile manufacture and also the service provider?
Regards,
Prasad P. Khandekar
Knowledge exists, man only discovers it.
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hi
i have a problem in displaying my data that resultset return into a tablelayout.My app android is connecting via a jdbc to my database
Need help:examples tutorial,...
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