Is there any timer interrupt example available? I need it to run in SB72-EX and MOD5234.
It would need to set up a 3ms delay in another task to signal with a timeout or setup a timer to call this timeout function.
Any tips?
Thanks !
3ms delay or ISR
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Ridgeglider
- Posts: 513
- Joined: Sat Apr 26, 2008 7:14 am
Re: 3ms delay or ISR
See the NB app note for 5234 PIT: http://www.netburner.com/downloads/mod5 ... ppNote.pdf
It shows a 1msec timer, but also how to modify. It's easy.
Next define a semaphore, and then init it. Inside the ISR, post to the semaphore. Next set up a task to pend (forever) on the same semaphore. Once again, after you define the semaphore, DON'T forget to init it before either posting or pending to it. See the project at C:\Nburn\examples\RTOS\OSSemaphore for a basic example of posting, pending, and task creation. You might also consider the calls OSSimpleTaskCreate() or OSSimpleTaskCreatewName() as slightly simpler alternatives to the more comprehensive OSTaskCreate() used in the example. Make sure not to use Pit Ch 0: it's already used by the OS delay system timer. Also, the example uses putleds(). Be aware (if by chance you're using the 5270LC development board) that putleds() can be pretty convoluted and forces pins to GPIO away from previous settings.
It shows a 1msec timer, but also how to modify. It's easy.
Next define a semaphore, and then init it. Inside the ISR, post to the semaphore. Next set up a task to pend (forever) on the same semaphore. Once again, after you define the semaphore, DON'T forget to init it before either posting or pending to it. See the project at C:\Nburn\examples\RTOS\OSSemaphore for a basic example of posting, pending, and task creation. You might also consider the calls OSSimpleTaskCreate() or OSSimpleTaskCreatewName() as slightly simpler alternatives to the more comprehensive OSTaskCreate() used in the example. Make sure not to use Pit Ch 0: it's already used by the OS delay system timer. Also, the example uses putleds(). Be aware (if by chance you're using the 5270LC development board) that putleds() can be pretty convoluted and forces pins to GPIO away from previous settings.
Re: 3ms delay or ISR
I developed a class called CMSTimer. CMSTimer uses OS_FLAGS. Class has 3 instance functions and 1 class function:
Instance
CMSTimer() - constructor
StartAndWait (DWORD value) - start the timer and wait for value time units
Process() - Process a CMSTimer instance (i.e., decrement the timer and set the flag when zero
Class
CMSTimerInterruptRoutine() - called in the interrupt routine to process all the timers
Example:
void myLED0Task(void *nullParam)
{
CMSTimer myTimer0;
while (1)
{
myTimer0.StartAndWait(14); // wait for 14ms
... do other stuff
}
}
The above assumes that you are calling CMSTimerInterruptRoutine in an interrupt routine that is executed every ms.
If you want the code I will send it to you.
bb
Instance
CMSTimer() - constructor
StartAndWait (DWORD value) - start the timer and wait for value time units
Process() - Process a CMSTimer instance (i.e., decrement the timer and set the flag when zero
Class
CMSTimerInterruptRoutine() - called in the interrupt routine to process all the timers
Example:
void myLED0Task(void *nullParam)
{
CMSTimer myTimer0;
while (1)
{
myTimer0.StartAndWait(14); // wait for 14ms
... do other stuff
}
}
The above assumes that you are calling CMSTimerInterruptRoutine in an interrupt routine that is executed every ms.
If you want the code I will send it to you.
bb
Re: 3ms delay or ISR
well if you can send me the source code it would be great !
Thanks for the feedback !
Thanks for the feedback !
Re: 3ms delay or ISR
I already sent it once. Provide me with you email address and I'll send it again.
bb
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