Chunhee Song wrote:
>
>   Hello,
>
> I am trying to send 2 different bytes data in sequence from PC to PIC
> hardware using
> serial communication. I am using interrupt function. since 2 these data
> are of use in sequence, I use flag bit. When pic gets the first data,
> counter sets 1 and flag bit is 1. when pic gets the second data, counter
> sets2 and flag bit is 0. when pic gets the third data, counter sets 3 and
> flag is 1. And so on. There is a time delay in every two data bytes.
>

Since the PC will most likely send the second byte directly after the
first why not try...

IRQ routine

        ; save interupt regs

        movf RCREG,W        ; get 1st byte
        movwf Direction

Wait    btfss PIR1,RCIF     ; (5) wait for next received data
        goto Wait

        movf RCREG,W        ; get 2nd byte
        movwf DutyCycle

        ; process data
        ; reset interrupt flags
        ; restore interrupt regs

        retfie


--
Best regards

Tony

http://www.picnpoke.com
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