sp;      GOTO LOOP_1
            BTFSS PORTB,2
            GOTO LOOP_2
            BTFSS PORTB,4
            GOTO LOOP_3
            GOTO LOOPA
LOOP_1
           BTFSC PORTB,1
           GOTO LOOPA
           MOVLW 255
           MOVWF DATA1
SET_LOOP1A
          BTFSC PORTB,1        ;去抖动
          GOTO LOOPA
          DECFSZ DATA1,1
          GOTO SET_LOOP1A
          MOVLW 6
          MOVWF DISPBUFF_1
            MOVLW 7
            MOVWF DISPBUFF_0
            MOVLW 8
            MOVWF DISPBUFF_3
            MOVLW 9
            MOVWF DISPBUFF_2
            MOVLW 0AH
            MOVWF DISPBUFF_5
            MOVLW 0
            MOVWF DISPBUFF_4
SET_LOOP1B
   BTFSS PORTB,1       ;等待按键放开
   GOTO SET_LOOP1B
   GOTO LOOPA
;--------------------------------
LOOP_2
           BTFSC PORTB,2
           GOTO LOOPA
           MOVLW 255
           MOVWF DATA1
SET_LOOP2A
          BTFSC PORTB,2        ;去抖动
          GOTO LOOPA
          DECFSZ DATA1,1
          GOTO SET_LOOP2A
          MOVLW 0BH
          MOVWF DISPBUFF_1
            MOVLW 0BH
            MOVWF DISPBUFF_0
            MOVLW 0BH
            MOVWF DISPBUFF_3
            MOVLW 0BH
            MOVWF DISPBUFF_2
            MOVLW 0BH
            MOVWF DISPBUFF_5
            MOVLW 0BH
            MOVWF DISPBUFF_4
SET_LOOP2B
   BTFSS PORTB,2       ;等待按键放开
   GOTO SET_LOOP2B
   GOTO LOOPA
;------------------------------------