syntax error help

[Nobody/Anonymous]

I'm having problems with the syntax in my program.
Idealy id like it to take 4 inputs and store them together as a single byte (with 4 leading 0's) but since i don't know how to do that im using each input to add to a variable (i). The syntax problem happens when i try to compile it. Check my only sub routine as it's whats causing the problem.

'chip settings
#chip 12F629, 4
#config OSC = INT, BODEN = OFF, MCLR = OFF, PWRT = OFF

'defines
#define StartUpDelay 10 ms
#define timeout 25 ms
#define utime 1 s
dim key byte 'this will be for later use, right now it does nothing

#define bin1 GPIO.0
#define bin2 GPIO.1
#define bin4 GPIO.2
#define bin8 GPIO.3
#define bcheck GPIO.4
#define latch GPIO.5

'setting pin direction
dir bin1 in
dir bin2 in
dir bin4 in
dir bin8 in
dir bcheck in
dir latch out

'dunno why i have this, but it's in the 12f629.txt file, so i left it here
Startup:
       Wait StartUpDelay
      
'main program
Main:
wait until bcheckp 'wait till a button is pressed
wait timeout 'timeout sequence
if not bcheckp then goto main 'if it's not presed, go back to main

i = 0 'setting i=0, no problems with that

Getkey 'running getkey sub routine

'code below sets latch high
if i = 11 then
set latch on
wait utime
end if
Goto Main

'function to check if the button is pressed
function bcheckp
bcheckp = false
if bcheck on then bcheckp = true
end function

'this is where i have my problems, help is appreciated
sub Getkey
if bin1 on then i+1 = i
if bin2 on then i+2 = i
if bin4 on then i+4 = i
if bin8 on then i+8 = i
end sub

[Nobody/Anonymous]

shouldn't it rather be
i = i + 1 ?
At least this is the common form to assign a new value to a var.

regards,
     Reelf

[Nobody/Anonymous]

Thanks. It's been a long time since i tried programming (was using qbasic and win 3.1)