[SOLVED] RB0 interrupt in Pic16f877a

[vinodstanur]

Can i configure(software) RB0 interrupt(in PIC16F877A) in such a way that interrupt occurs on a high to low transition at the RB0?
I had already connected a TSOP o/p to RB0. But TSOP is an active low device.

Otherwise i need to NOT the TSOP o/p before connecting to RB0.:-(

 

[hussain_kiet]

yes definitely you can select high to low or low to high either.
you just have to set the bit INTEDG in OPTION_REG..
just read that if your compiler gives you an option or you have to do it yourself..
in CCS compiler we have a seperate function for that..

ext_int_edge( 2, L_TO_H); // Set up PIC18 EXT2
ext_int_edge( H_TO_L ); // Sets up EXT

 

[vinodstanur]

thanks hussain....and just now only i had seen it in the datasheet of pic16f877a.