I don't want to sleep or save power, but I *do* want to get a very accurate interrupt every second as the basis of my timebase.

I have a Counter (v2.10) in a PSoC5 design.  It generates the first interrupt, but never again, as if it's not running continuously.

By configuration is as follows:

Resolution: 24bit
Implementation: UDB
Period: 1999999 (shortened to 1999 for testing)
Compare Mode: Software Controlled (I don't care)
Compare Value: 1999999 (I don't care, shortened to 1999 for testing)
Clock Mode: Up Counter
Capture Mode: None
Enable Mode: Software Only
Run Mode: Continuous
Reload Counter: On Reset, On TC
Interrupt; On TC

Inputs and Outputs:

count: 2MHz clock
clock: 5MHz clock
reset: no connection
tc: no connection
comp: no connection
interrupt: connected to "ISR_UPDATE"

In ISR_UPDATE.c CY_ISR() function, I set a flag true.  In main program I wait "while" for flag to be true, then set flag false.  In debug mode, I hit a breakpoint inside the CY_ISR() function, then I hit a breakpoint after my wait.  But when I continue after that, the interrupt never happens again.  I am calling the both counter Start() function and ISR_UPDATE_Start().

Why am I never getting the second update?

Thanks!

This from help site, strangely not mentioned in DS.

Regards, Dana.

Yes, forgetting to clear the interupt status is, in my experience, the most frequent error when dealing with interrupts. Fortunately it is a simple one, and easy to find from the symptoms.

Nontheless, as a newbee you may spend hours and hours trying to find out, what is going on.

Or just ask the community. ,-)

Bob

Thanks, that did it, of course...  And, yes, I now find this comment in the manual, but NOT in the location I would have (did) searched and encountered it.

Isn't there a forum concerning documentation / datasheets? If you post a short description there together with a link to this thread maybe somebody changes the docs accordingly.

Bob

It might be an idea to add a comment stating the possible need for clearing the interrupt flag to the generated code. That way it might be more obvious to anybody implementing his/her first ISR.

www.psocdeveloper.com specifically has a forum for sugegsting doc changes.

You might also consider posting it as a tech case to get Cypress attention.

Regards, Dana.