PIC16F628A input question

[yankee]

Hi Bob, thanks for the reply. I searched and could find nothing that I was able to understand. Can someone provide a little help?

Thanks in advance! ~ Dave

[peterdeco1]

Hi Yankee. You can do it simply with your code. The following assumes porta is held high and your input switches have common negative. Portb.0 controls operation1. Portb.1 controls operation2.

START:
LOW PORTB.0 'cancel operation1
LOW PORTB.1 'cancel operation2
IF PORTA.0 = 0 THEN OPERATION1 'ignore switch #2 but if #1 switch on do operation1
GOTO START

OPERATION1:
IF PORTA.0 = 1 AND PORTA.1 = 1 THEN START 'both switches off cancel both operations
HIGH PORTB.0 'do operation 1
IF PORTA.1 = 0 THEN OPERATION2 '#2 switch on do operation2
GOTO OPERATION1

OPERATION2:
LOW PORTB.0 'cancel operation1
HIGH PORTB.1 'start operation2
IF PORTA.1 = 0 THEN OPERATION2 'ignore #1 switch & stay here if #2 switch on
GOTO START 'switch #2 off go home

[yankee]

OK, I'll try that out!

I'll tell you what, it isn't easy going from strictly analog for 25 years to digital. Maybe this old dog can learn some new tricks.

Thanks!