Libstock interrupt examples for 18F45K22

[Lord Lucan]

In the example the interrupt routine reads as follows:

Code: Select all

void interrupt(){           // Interrupt rutine
  if(INT0F_bit == 1 ) {     // Checks Receive Interrupt Flag bit
    flag      = 1;          // Set local interrupt flag
    INT0F_bit = 0;          // Clear Interrupt Flag
  }
}

Shouldn't the INT0F statements be INT0IF?



ST.

[marina.petrovic]

Hi,

According to datasheet bit 1 in INTCON register is INT0IF (INT0IF_bit),
but if you take a look at PIC18F45K22 definition file in compiler (Ctrl + Alt + D),
you can see that you can use INT0IF_bit or INT0F_bit equally, because, both corresponding to INTCON bit 1.

Code: Select all

// INTCON bits
...
   const register unsigned short int INT0IF = 1;
   sbit  INT0IF_bit at INTCON.B1;
...
   const register unsigned short int INT0F = 1;
   sbit  INT0F_bit at INTCON.B1;
...

Best regards,
Marina

[Lord Lucan]

Ah! Okay...

One more thing, the example sets the interrupt to activate on a rising edge but the datasheet indicates that RB0 - RB2 have internal pull-ups - is that going to work?

I'm coding at the moment and I haven't had the chance to test on hardware yet.

ST.

[marina.petrovic]

Hi,

Examples posted on LibStock Website by MikroElektronika are tested.

As the example is written for EasyPIC v7 board - PIC18F45K22, at the beginning of the example you can find note:
"Put PORTB dip switch RB0 in PullDown position".

Best regards,
Marina

[AllenM]

The internal interrupts need to be enabled in your program for them to work. I think the default is that they are turned off.