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GPIO interrupt

 
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cartic



Joined: 16 Nov 2004
Posts: 8

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GPIO interrupt
PostPosted: Thu Jun 16, 2005 12:03 pm     Reply with quote
Hello everyone,
I am using PIC 12F675.I need the PIC to wake up from sleep by a GPIO interrupt on GP0.
I used the directive #INT_RA0.
I saw its defined in the 12f675.h header file.
But I get an error, when I compile saying "INVALID PREPROCESSOR DIRECTIVE".
I would like to know, what is wrong in the code
Code:

#INT_RA0
interrupt_handle()
{
static int data;
if(data==0x30){
data=0x31;
}
else {
data=0x30;
}
}

// MAIN PROGRAM
void main()
{
   init();
   enable_interrupts(GLOBAL);
   enable_interrupts(INT_RA0);
   while(1)
   {
   SLEEP();
   delay_ms(100);
   }
}

Aslo, I saw an INT_RB directive in the 12f675.h header file.
Since, there is only one GPIO port, I dont know, what is the purpose of INT_RB.
And also, I would like to know, how the interrupts are defined in the header file, I tried to figure it out but I could'nt . It be really helpful, if somebody can help me on this issue.
Thanks
cartic
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Thu Jun 16, 2005 12:08 pm     Reply with quote
See my post which explains how to use INT_RA0, etc.:
http://www.ccsinfo.com/forum/viewtopic.php?t=4352&highlight=intra0

See these posts by Ttelmah which explain more:
http://www.ccsinfo.com/forum/viewtopic.php?t=21564&highlight=intra0
http://www.ccsinfo.com/forum/viewtopic.php?t=21440&highlight=intra0
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