Interrupt at pinswitch problem

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RoBSki!
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Posted by RoBSki!: Tue. Dec 6, 2005 - 07:03 PM
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Here I am again... :oops:

I have a circuit with LED's, and when an timer1 interrupt occurs sometimes I see the LED's switch on and off very fast.
Now I use cli to disable the interrupts before switching and sei to enable the interrupt again.
Now this fenomen is gone.
Is there an option/trick so that the interrupt cannot occurs only when a pin is switching?

:?:

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AVR Microcontrollers, megaAVR and tinyAVR
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groenhen
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Posted by groenhen: Tue. Dec 6, 2005 - 07:07 PM
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So, the timer1 interrupt is controlling the LEDs or what?
If not, just use cli/sei... it should be fine.
Ok, another "trick" is to disable ONLY the timer1 interrupt and then to re-enable the timer1 interrupt (after you finish switching).

But, anyway... what is the cause of this strange behaviour?

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whein
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Posted by whein: Tue. Dec 6, 2005 - 07:53 PM
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RoBSki,
Post some code and we can better evaluate what is happening. It might not be interrupts that are causing the problem. Hard to say without more details and the code.
-Will

Last Edited: Tue. Dec 6, 2005 - 09:34 PM
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groenhen
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Posted by groenhen: Tue. Dec 6, 2005 - 07:58 PM
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Quote:
Hard to say with more details and the code.

Rather easier... ? :wink:

Real men don't use backups, they post their stuff on a public ftp server and let the rest of the world make copies.

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Sceadwian
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Posted by Sceadwian: Tue. Dec 6, 2005 - 09:17 PM
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Are you using the pin change interupt for other code?

-Curiosity may have killed the cat
-But that's why they have nine lives

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