PIC的BIN TO BCD子程序

;**********二进制转换成BCD码子程序,入口W*****
;********出口为R2，R1，R0寄存器
BINTOB     movwf   buf_read      ;W->buf_read
           clrf    R0
           clrf    R1
           clrf    R2
           movlw   08h
           movwf   counter_pub
loopc      bcf     STATUS,C
           rlf     buf_read,1
           rlf     R0
           rlf     R1
           decfsz  counter_pub,1
           goto    adjdec
           movlw   0fh
           andwf   R1,0
           movwf   R2
           swapf   R0,0
           movwf   R1
           movlw   0fh
           andwf   R0,1
           andwf   R1,1
           return
adjdec     movlw   03h
           addwf   R0,1
           btfsc   R0,3
           goto    next_r0
           subwf   R0,1
next_r0    movlw   030h
           addwf   R0,1
           btfsc   R0,7
           goto    loopc
           subwf   R0,1
           goto    loopc

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