【正文】 口與喇叭單元信號輸入端以導(dǎo)線連接即可。在硬件設(shè)計，尤其是萬能板焊接前的具體電路設(shè)計階段，由于不得不考慮手中現(xiàn)有材料的限制，曾經(jīng)出現(xiàn)嚴(yán)重的元件錯接在高電平上的事故，好在接通電源前及時發(fā)現(xiàn)并更正，否則該元件極有可能發(fā)生爆炸。n4 equ d39。 。do equ d39。so equ d39。re1 equ d39。0000000039。clear screen movwf portd call down bcf porte,0 movlw b39。0110010139。 movwf portd call down movlw b39。0110000139。 movwf portd btfss portb,3 call one movlw b39。 movwf portc movlw b39。 movwf porte movlw b39。 movwf portd call down movlw b39。 movwf portd call down movlw b39。 movwf portd call down movlw b39。 movwf portd call down call delay1 call delay1 call delay1 call delay1 call delay2 call delay2 call delay2 call delay2 call delay3 call delay3 call delay3 call delay3 call delay1 call delay1 call delay1 call delay1 call delay0 call delay1 call delay1 call delay1 call delay1 call delay2 call delay2 call delay2 call delay2 call delay3 call delay3 call delay3 call delay3 call delay1 call delay1 call delay1 call delay1 call delay0 call delay3 call delay3 call delay3 call delay3 call delay4 call delay4 call delay4 call delay4 call delay5 call delay5 call delay5 call delay5 call delay5 call delay5 call delay5 call delay5 call delay0 call delay3 call delay3 call delay3 call delay3 call delay4 call delay4 call delay4 call delay4 call delay5 call delay5 call delay5 call delay5 call delay5 call delay5 call delay5 call delay5 call delay0 call delay5 call delay5 call delay5 call delay6 call delay5 call delay5 call delay5 call delay4 call delay3 call delay3 call delay3 call delay3 call delay1 call delay1 call delay1 call delay1 call delay0 call delay5 call delay5 call delay5 call delay6 call delay5 call delay5 call delay5 call delay4 call delay3 call delay3 call delay3 call delay3 call delay1 call delay1 call delay1 call delay1 call delay0 call delay1 call delay1 call delay1 call delay1 call delay7 call delay7 call delay7 call delay7 call delay1 call delay1 call delay1 call delay1 call delay1 call delay1 call delay1 call delay1 call delay0 call delay1 call delay1 call delay1 call delay1 call delay7 call delay7 call delay7 call delay7 call delay1 call delay1 call delay1 call delay1 call delay1 call delay1 call delay1 call delay1 call delay0 return bb call delay3 call delay3 call delay4 call delay4 call delay call delay5 call delay5 call delay3 call delay3 call delay call delay3 call delay3 call delay5 call delay5 call delay call delay5 call delay5 call delay4 call delay4 call delay call delay3 call delay3 call delay2 call delay2 call delay2 call delay2 call delay2 call delay2 call delay0 call delay3 call delay3 call delay2 call delay2 call delay call delay1 call delay1 call delay call delay1 call delay1 call delay1 call delay1 call delay8 call delay8 call delay call delay8 call delay8 call delay8 call delay8 call delay call delay3 call delay3 call delay5 call delay5 call delay5 call delay5 call delay5 call delay5 call delay0 call delay1 call delay1 call delay call delay1 call delay1 call delay2 call delay2 call delay2 call delay2 call delay1 call delay1 call delay1 call delay1 call delay1 call delay1 call delay1 call delay1 call delay call delay8 call delay8 call delay0 call delay8 call delay6 call delay6 call delay6 call delay6