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Trouble with ext interrupt RB4-RB7

 
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sonny



Joined: 14 Sep 2015
Posts: 7

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Trouble with ext interrupt RB4-RB7
PostPosted: Mon Sep 14, 2015 9:55 am     Reply with quote
Hello,

I'm new to the forum and to coding to. Anyway I'm struggling with the external interrupt change on value in RB5. I have a pic 1845J50, I made the circuit regulate an external voltage to a 3.3 V, I want to detect in RB5 when is changing from 0 to 3.3V and from 3.3 to 0. Basically changing from 1 to 0 or 0 to 1.

Please Help
TIA
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Mon Sep 14, 2015 1:08 pm     Reply with quote
http://www.ccsinfo.com/forum/viewtopic.php?t=52922&highlight=intrb
http://www.ccsinfo.com/forum/viewtopic.php?t=52765&highlight=intrb
sonny



Joined: 14 Sep 2015
Posts: 7

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PostPosted: Tue Sep 15, 2015 6:33 am     Reply with quote
Thanks so yesterday I got it to work but I can't monitor the H_TO_L and the L_TO_H on the same time in different pins. I want when the interrupt sees the voltage going low then the LED2 goes high, but if goes high led1 goes high. Can't see my error, please help.
This is what I have
Code:

#INT_RB
RB()
{
if(INPUT(PIN_B5) == 1)
   output_high(LED1);
else if (INPUT(PIN_B4) == 0)
   output_high(LED2);
break;
}

void main()
{
TRISB = 0b11110000;
PORTB = 0X00;
ext_int_edge(L_TO_H);
ext_int_edge(H_TO_L);
enable_interrupts(INT_RB);
enable_interrupts(GLOBAL);
clear_interrupt(INT_RB);
output_low(LED1);
output_low(LED2);
}
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