Hello,
I seem to be having a problem doing a computed goto with a 18f258.
I'm basically trying to make a state machine, but only the first two
states are working, and I use that term loosely.

I'm using the following code to generate the state-machine run loop.
The "curr_state" variable holds the current state number.  I've made
this a macro so that the GOTOs can be generated automatically.  In
my test code, the "states" is set to 3 (so, labels state0, state1, and
state2.)


run_state_machine       macro   states
        movlw   UPPER(state0)   ; make sure the upper bytes of the PC
        movwf   PCLATU          ; register are defined to the
        beginning
        movlw   HIGH(state0)    ; of the state machine goto list
        movwf   PCLATH

        banksel curr_state
        rlncf   curr_state, W   ; double because gotos are two words long
        addwf   PCL, F

        local index = 0
        while index < states
        goto    state#v(index)
index = index + 1
        endw
        endm


Does anyone see what I'm doing wrong with this code?  When I set
"curr_state" to 2, it should vector to the third GOTO, but that does
not happen.

I'm not sure if this is enough information, but if more is required,
please let me know.  I can post as much as required.

Thank you for any help you can provide.
        -- Robert

--
    Robert James Kaes    ---  Flarenet Inc.  ---    (519) 426-3782
                 http://www.flarenet.com/consulting/
      * Putting the Service Back in Internet Service Provider *

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