CCS :: View topic - INT_EXT interrupting in enable http://ccsinfo.com/forum/viewtopic.php?t=27783&highlight=inte...

1 от 2 01.3.2007 г. 10:29

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INT_EXT interrupting in enable

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Breno

Joined: 20 Jul 2006Posts: 5Location: Belo Horizonte, Brazil

INT_EXT interrupting in enablePosted: Mon Jul 31, 2006 4:47 pm

I am having a problem with interrupts: when I enable INT_EXT, it imediatly goes to the

interrupt routine, no matter what border it was configured. I am simulating this in proteus so there is no bouncing problem.

This initialize the interrupt:

Code:

ext_int_edge(H_TO_L); enable_interrupts(INT_EXT); enable_interrupts(GLOBAL);

This is the interrupt routine:

Code:

#INT_EXT void int_isr(void) { c=spi_read(0); lcd_putc(c); }

What should I do so the interrupt routine will only be accessed when the PIN_B0 gets low?

Thanks.

Breno

Last edited by Breno on Mon Jul 31, 2006 5:01 pm; edited 1 time in total

PCM programmer

Joined: 06 Sep 2003Posts: 6775

Posted: Mon Jul 31, 2006 4:55 pm

Quote:

When I enable INT_EXT, it immediately goes to the interrupt routine.

Add the line shown below. It may help.

Code:

CCS :: View topic - INT_EXT interrupting in enable http://ccsinfo.com/forum/viewtopic.php?t=27783&highlight=inte...

2 от 2 01.3.2007 г. 10:29

ext_int_edge(H_TO_L); enable_interrupts(INT_EXT); clear_interrupt(INT_EXT); // Add this line enable_interrupts(GLOBAL);

Breno

Joined: 20 Jul 2006Posts: 5Location: Belo Horizonte, Brazil

Posted: Mon Jul 31, 2006 5:11 pm

Thanks man, this has fixed the problem.

But I also tried something that worked: configuring the portb directions after the

enable_interrupts.

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