Yuri Flores Blanco wrote:
>
> Hi all,
>
> Having some problems,my problem is 16C74a slave port and interuption .
> thank you


There has been an errata sheet concerning the interrupts generated by
the
slaveport. Spurious interrupts are generated. The solution is given in
the sheet. A copy/paste from an operational source :

interrupt:  ....

            btfsc   PIR1,PSPIF           ; slaveport interrupt?
            goto    psp_int
psp_exit    equ     $

            ....
            retfie



;-----------
psp_int:    bcf     PIR1,PSPIF           ; clear request PSPIF

            regbank1
            btfsc   TRISE,IBF            ; was there pcwrite?
            goto    pcwr1

            btfsc   TRISE,OBF            ; 0 if pc has read data (SEE
ERRATA!)
            goto    pcwr1                ; see errata sheet

pcrd1:      regbank0                     ; pc has read data
            movlw   0
            movwf   slaveport            ; clear OBF (set)
            goto    psp_exit             ; back. No reads yet.


pcwr1:      btfss   TRISE,IBOV           ; was there overflow?
            goto    pspwr2               ; no
            bcf     TRISE,IBOV           ; yes, clear IBOV

pspwr2:     regbank0
            bsf     slavestat,pc2pic     ; set flag
            movf    slaveport,W          ; get byte, clear IBF
            movwf   slavebyte            ; save byte
            goto    psp_exit             ; jump back in service routine


may the source be with you. Bye.