Hi,


        As usual, I have some questions today... I am using the check_keys
routine from Bob Blick. In fact, it only detects falling edges on portA.
I am searching for a routine that could decide between a single press on
a switch and a long press on a switch (more than 500ms or 1s). The
reason is that I don't have so much I/O on my 16C84 and had like one
switch to have more than one function. Can anybody help?


-david

P.S.: Thanks to everybody for the EEPROM writing, it works nicely since
I am waiting for the write to complete :)
;--------
; test for keypress and call time adjust if needed
;--------
Check_keys      movf    PORTA,w         ;get port "a"
                xorwf   keys,w          ;compare with previous
                andlw   b'00000111'     ;only care about button pins
                btfsc   STATUS,Z        ;zero set=no buttons
                retlw   0               ;return
                xorwf   keys,f          ;store key value
                movlw   0x64            ;a fairly long delay will
                movwf   scratch         ;prevent key bounces
Key_delay       movlw   0xFF
                call    Delay
                decfsz  scratch
                goto    Key_delay
                btfss   keys,2          ;test "minutes" button
                goto    Inc_mins
                btfss   keys,1          ;test "tens" button
                goto    Inc_tens
                btfss   keys,0          ;test "hours" button
                goto    Inc_hours
                retlw   0               ;must be a glitch. yeah, right!