how to use interrupt?

Morfius · Post by **Morfius** » Tue Feb 10, 2009 4:36 pm

Hi,

I have to make a full stop in my program with a interrupt: the program can be stoped at any time or place, by pushing a button (C7)
It's the first year that I work with Flowcode, so I don't know how to use an interrupt.
can someone help me please?

Morfius

Post by **Benj** » Tue Feb 10, 2009 4:55 pm

Hello Morfius

I dont think there is an interrupt that you can trigger via pin C7. Normally the interrupt pins are B0 and the upper 4 bits of PortB (B4 - B7).

The interrupt works by jumping from your main program into a macro when an event occurs. So you would use an interrupt icon in Flowcode, set to enable the interrupt near the start of your program outside of the main loop (dont want to keep calling this in your program). Create a macro to run when the interrupt occurrs. Next put the code into the interrupt macro that you want to run when the event occurs. When the interrupt macro is finished the chip will resume where it left off in your main program allowing interrupts to be triggered again. Using the disable interrupt icon will stop the specific interrupt from firing.

Morfius · Post by **Morfius** » Wed Feb 11, 2009 9:06 am

it doesn't work If I put the interrupt outside the loop (X<>128) ( I used B4,5,6,7 to activate the interrupt, but I only want B7 to activate the interrupt. If I put the interrupt in "decision", the interrupt doesn't work.
Very strange, no?

Post by **Benj** » Wed Feb 11, 2009 10:09 am

Hello Morfius

Attach your program to the forum if you like and I will have a quick look for you and see if I can spot any potential problems.

Morfius · Post by **Morfius** » Thu Feb 12, 2009 8:07 am

Ok thanks

Post by **Dan81** » Thu Feb 12, 2009 9:16 am

Hello

If you want to stop your programme for good , try this.
For restart, you will have to reset the Pic or power off.

Daniel

Post by **Benj** » Thu Feb 12, 2009 10:32 am

Hello

I have made a few mods to allow your program to function a bit better. Though looking at Dans example this may be better for a complete end to your program.

Morfius · Post by **Morfius** » Thu Feb 12, 2009 11:49 am

can you make a picture of it?
I can't open this file.
sorry

Post by **Benj** » Thu Feb 12, 2009 5:04 pm

Hello

You can download the latest version of Flowcode from here.

http://www.matrixmultimedia.com/Downloa ... k.php?id=2

Then you will be able to open the files.

Morfius · Post by **Morfius** » Fri Feb 13, 2009 1:41 pm

thanks a lot!

I know now how to use interrupt (basics)
I made an interrupt macro on my way. So I didn't just copy
I don't understand your way fully yet, but I will study it further.
thanks for your help

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