Are SDO and SCK both set as output (0) in the TRIS register?

> -----Original Message-----
> From: pic microcontroller discussion list
> [mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of K=FCbek Tony
> Sent: Thursday, February 07, 2002 5:45 AM
> To: PICLIST@MITVMA.MIT.EDU
> Subject: Re: [PIC]: 18c452 - Master mode SPI sends no data
>
>
> 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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