Buttons are driving me nuts

[mister_e]

TRISB configure i/o as input or output while PORTB is the place to read/write from/to.

try...

<font color="#000000">        @ device pic16F648A, wdt_off, intrc_osc_noclkout, mclr_off, protect_off
        <font color="#000080">DEFINE </font>OSC 4
        CMCON = 7 <font color="#008000">' Turn all comparators to fully digital (needed??)
        </font>TRISB.3 = 0 <font color="#008000">' IR Output Pin
        </font>TRISB.4 = 1 <font color="#008000">' Shutter Input Pin

</font>start:
        <font color="#000080">WHILE </font>PORTB.4 = 0 : <font color="#000080">WEND
        GOSUB </font>Shutter
        <font color="#000080">PAUSE </font>250 
        <font color="#000080">GOTO </font>start
        
Shutter:
        <font color="#000080">HPWM </font>1,127,38500 <font color="#008000">' Configure HPWM for 50% duty cycle PWM signal at 38.5kHz
        </font><font color="#000080">PAUSE </font>500
        CCP1CON = 0      <font color="#008000">' PWM OFF
        </font><font color="#000080">RETURN
</font>

[Doormatt]

Thank you SO much!

I feel like an utter idiot for making that mistake.

[mister_e]

I guess you will never do it again

Don't worry about that, take your time, understand what you do, and enjoy the result.

We are here to help anyway.