Hi,
here are some code that works on an 16F87x, should be minor
differences with the 18xx.
Although it uses fsr to access the config regs ( not advicable by Mchip )
I don't se any reason for it not to work.

/Tony


; ***********************************************************************
;
;  INIT_SPI - Initialises SPI, module, full speed, master mode, idle clock
low
;  does NOT enable SPI interrupts ( use polling )
;  Can be at any bank at entry, leaves ram bank setting intact at exit.

INIT_SPI
        ; make sure pins are setup before calling this routine
        ; TRISC:5 and TRISC:3 must be cleared ( as for input, but operates
as outputs )
        ; furthermore its advised that interrupts are disabled during this
routine

        ; setup SPI status reg
        MOVLW   SSPSTAT ; get adress for synch serial port status reg
        MOVWF   FSR     ; setup fsr
        MOVLW   0x00; (1<<CKE) ; data tx at rising edge
        MOVWF   INDF    ; and store it

        ; setup SPI control reg
        MOVLW   SSPCON  ; get adress for synch serial port control reg
        MOVWF   FSR     ; setup fsr
        MOVLW   ((1<<SSPEN)|(1<<CKP)|(1<<SSPM0)); enable syncronous port,
idle clock is high,speed XTAL/16
        MOVWF   INDF    ; and set it


        ; make sure SPI interrupts are disabled
        MOVLW   PIE1    ; get adress for periphial irq's
        MOVWF   FSR     ; setup fsr
        BCF     INDF,SSPIE ; 'disable' reciever irq

        RETURN

; ***********************************************************************
;
;  SPI_XFER_BYTE - sends ( and receives ) one byte , by using h/w SPI
;  Byte to send in W, returns with received data in W
;
SPI_XFER_BYTE
        MOVWF   SSPBUF  ; put out byte for sending
                        ; initiate an send seq.
        MOVLW   SSPSTAT ; get adress for SPI status
        MOVWF   FSR     ; setup FSR
SPI_XFER_LOOP
        BTFSS   INDF,BF ; check for tx complete
        GOTO    SPI_XFER_LOOP   ; nope
        MOVF    SSPBUF,W        ; get received byte
        RETURN          ; and return

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