INT_RB1_H2L on PIC16lf1936

jbw · Guest

I need to use a High to low interrupt on PIN_B1. The header file for the part defines INT_RB1_H2L, I have tried to use this to make an interrupt when RB1 goes high to low (using #INT_RB1_H2L) but it will not compile.

Looking at the "Valid interupts" tab in PCW it does not list RB1_H2L as a valid interrupt. It only list RB which will interrupt on change of PINB4-7

The datasheet confirms that RB1 can be used to interrupt on high to low.

So what am I missing? Do I have to make my own interrupt handler?

Thanks,
Josh

PCM programmer · Joined: 06 Sep 2003 Posts: 21708

What is your compiler version ?

Ttelmah · Guest

Realistically, I'd just set the control bits myself.
CCS, are trying to offer to do this for you, but have obviously not got it working yet.
There is only one interrupt used for this, and this would be the INT_RB interrupt, but what they are doing is offering to set just the bits to enable the interrupts on particular pins, and then to add the code to test which pin has interrupted, and vector to the particular routine. If you are only using one, this latter is just wasted space/time, so it only becomes a matter of setting up the control registers to enable the correct pin and edge.
You'd need something like: