I've been working on a project using the 16F871 chip, I got two samples f=
rom
Microchip, updated MPLAB to the latest version, and set to get going on t=
his. =



The first thing I always do is something simple, just to let me know that=
 the
chip is working, rather than do something elaborate and try to figure out=
 what
I did wrong.  So I did the simple, read a port switch, and turn on an LED=
 when
the switch activates.  No go.  I used portA for the input, set the TRIS t=
o
0xFF, and used portC as the output, setting TRIS to 0x00

Seems the portC is not behaving as an output.  I'm using a 4MHz TTL oscil=
lator
(yes its working, have it hooked to OSC1 input, and get an output on OSC2=
,
input is set to HS.

I even backed off and made the program simple by just TURNING on the LED =
but
portC seems to be...not working or intializing.

Now, one thing that is strange is I get the following error in MPLAP when=
 I
assemble.

Building TEST.HEX...

Compiling TEST.ASM:
Command line: "C:\PROGRA~1\MPLAB\MPASMWIN.EXE /p16F871 /q D:\A_STC\TEST.A=
SM"
Message[301] D:\A_STC\P16F871.INC 35 : MESSAGE: (Processor-header file
mismatch.  Verify selected processor.)
Warning[224] D:\A_STC\TEST.ASM 19 : Use of this instruction is not
recommended.
Warning[224] D:\A_STC\TEST.ASM 22 : Use of this instruction is not
recommended.

Build completed successfully.

Whats the deal with the processor header file mismatch?

here is the source file


        list      p=3D16F871            ; list directive to define processor
        #include <p16F871.inc>        ; processor specific variable definitions
PORTA                        EQU     H'0005'
PORTB                        EQU     H'0006'
PORTC                        EQU     H'0007'
PORTD                        EQU     H'0008'
PORTE                        EQU     H'0009'
PCLATH                       EQU     H'000A'


        org     0x000       ; The main line code starts here
main
        goto init
        org     0x010
init
        movlw   0xFF
        tris    PORTA
        =

        movlw   0x00
        tris    PORTC
here    =

        bcf     PORTC,2
        bsf     PORTC,0
        bcf     PORTC,1
        bsf     PORTC,2
        nop
        nop
        nop
        goto    here

        end

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