【正文】 H,52H,68H,34H,52H,62H,54H,34H,12H,92H,52H,32H ,28H DB26H,32H,54H,52H,62H,34H,24H,18H,56H,32H,22H,12H,92H,12H,8FH DB66H,52H,34H,54H,0B4H,62H,52H,68H,34H,52H,62H,54H,34H,12H,92H,52H,32H ,28H DB 26H,32H,54H,52H,62H,34H,24H,18H,56H,32H,22H,12H,92H,12H,8FH DB 00 TABLE80: DB86H,92H,12H,22H,32H,52H,68H,63H,52H,34H,62H,0B2H,0B2H,62H,51H,61H,51 H,31H,54H DB62H,0B2H,0B2H,62H,52H,32H,52H,52H,51H,61H,51H,31H,34H,52H,62H,74H,32 H,52H,52H,32H,21H,31H,21H,11H,24H DB 32H,52H,52H,32H,22H,12H,24H,32H,52H,52H,32H,62H,52H,61H,51H,31H,21H,21 H,31H,21H,11H,1CH DB21H,31H,22H,23H,31H,21H,18H,02H,0B2H,0BCH,0B4H,72H,61H,51H,72H,61H,7 1H,61H,51H,61H,71H,61H,6FH DB86H,94H,12H,22H,32H,52H,64H,62H,51H,31H,52H,21H,31H,21H,33H,62H,0B2H ,0B2H,62H,51H,61H,51H,31H,54H DB62H,0B2H,72H,61H,51H,51H,61H,51H,31H,54H,61H,0B2H,72H,61H,51H,51H,61 H,51H,31H,32H,21H,11H,32H,51H,61H,54H DB02H,32H,24H,32H,52H,52H,32H,22H,31H,21H,11H,24H,32H,52H,62H,0B2H,72H ,61H,51H,61H,51H,31H,32H,52H,52H,32H,62H DB51H,31H,31H,21H,11H,91H,23H,31H,21H,1CH,12H,24H,32H,62H,51H,31H,34H, 0B4H,72H,61H,51H,63H,71H,64H DB0B2H,54H,72H,62H,71H,61H,54H,61H,51H,31H,21H,34H,73H,61H,54H,22H,32H ,52H,22H,36H,52H,62H,61H,31H,32H,21H,11H,21H,11H,91H,81H DB94H,52H,62H,52H,42H,32H,22H,32H,52H,0B4H,74H,64H,52H,61H,51H,41H,5CH ,02H,52H,0B4H,74H,63H,51H,61H,51H,31H,21H DB 00 TABLE90: DB02H,11H,21H,32H,32H,22H,32H,21H,11H,0A1H,91H,92H,0D1H,91H,83H,91H,0A 2H,91H,81H,94H,11H,0A1H,91H,0A1H,98H,03H,81H,0A1H,0A1H,91H,0A1H DB98H,04H,02H,11H,21H,32H,32H,22H,32H,21H,31H,51H,11H,13H,31H,22H,22H, 21H,11H,0A1H,11H,13H,11H,11H,0A1H,91H,0A1H DB11H,93H,94H,03H,81H,11H,0A1H,91H,81H,92H,0A1H,91H,94H,08H,03H,81H,32 H,21H,11H,22H,31H,21H,21H,83H DB01H,11H,91H,0A1H,11H,61H,51H,11H,34H,01H,31H,21H,31H,48H,23H,31H,32H ,42H,38H,03H,11H,21H,52H,31H DB33H,31H,31H,41H,51H,61H,23H,21H,21H,41H,31H,21H,13H,0D1H,0D1H,21H,11 H,0A1H,11H,91H,92H,91H,11H,0A1H,91H DB0A1H,31H,31H,22H,0A1H,11H,14H,01H,11H,21H,31H,63H,31H,42H,51H,31H,31 26 H,22H,11H,21H,52H,31H,33H,31H,31H,41H DB51H,61H,23H,21H,21H,41H,31H,21H,13H,0D1H,0D1H,21H,11H,0A1H,11H,91H,92H,91H,11H,0A1H,91H DB0A2H,41H,31H,22H,31H,21H,12H,12H,11H,11H,21H,31H,63H,51H,32H,11H,21H ,26H,11H,0A1H,18H DB 00 TABLE100: DB02H,91H,0A1H,16H,21H,11H,0A6H,81H,0A1H,9CH,02H,91H,0A1H,16H,21H,31H, 24H,21H,0A1H,11H,0A1H DB9CH,02H,11H,21H,36H,32H,24H,21H,0A1H,11H,0A1H,9CH,02H,91H,0A1H,14H,1 1H,11H,21H,11H,0A4H,04H,04H,02H,0A1H,11H,0A1H,93H,92H DB02H,61H,71H,0B4H,0B2H,0B1H,0B1H,76H,0B1H,71H,6CH,02H,61H,71H,0B6H,0B 1H,0B1H,76H,0B1H,71H,6CH,02H,51H,61H,56H,61H,51H,54H,51H,0B1H,71H,0B1H DB 72H,62H,68H,02H,61H,51H,66H,62H,58H,0CH,02H,51H,41H,5FH DB02H,91H,0A1H,16H,21H,11H,0A6H,81H,0A1H,9CH,02H,91H,0A1H,16H,21H,31H, 24H,21H,0A1H,11H,0A1H DB9CH,02H,11H,21H,36H,32H,24H,21H,0A1H,11H,0A1H,9CH,02H,91H,0A1H,14H,1 1H,11H,21H,11H,0A4H,04H,04H,02H,0A1H,11H,0A1H,93H,92H DB02H,61H,71H,0B4H,0B2H,0B1H,0B1H,76H,0B1H,71H,6CH,02H,61H,71H,0B6H,0B 1H,0B1H,76H,0B1H,71H,6CH,02H,51H,61H,56H,61H,51H,54H,51H,0B1H,71H,0B1H DB 66H,62H,54H,0B2H,71H,61H,6CH DB 00 END 9JWKf wvGt YM*Jgamp。MuWFA5uxY7JnD6YWRr Wwc^vR9CpbK!zn%Mz849Gx^Gj qv^$UE9wEwZQcUE% amp。MuWFA5uxY7JnD6YWRr Wwc^vR9CpbK! zn%Mz849Gx^Gj qv^$UE9wEwZQcUE%amp。 MuWFA5uxY7JnD6YWRrWwc^vR9CpbK! zn% Mz849Gx^Gj qv^$UE9wEwZQcUE%amp。 MuWFA5uxY7JnD6YWRr Wwc^vR9CpbK!zn%Mz849Gx^Gj qv^$UE9wEwZQcUE% amp。 qYpEh5pDx2zVkumamp。 MuWFA5uxY7JnD6YWRrWwc^vR9CpbK! zn% Mz849Gx^Gjqv^$UE9wEwZQcUE% amp。MuWFA5uxY7JnD6YWRr Wwc^vR9CpbK!zn%Mz849Gx^Gj qv^$UE9wEwZQcUE%amp。 qYpEh5pDx2zVkumamp。 qYpEh5pDx2z Vkumamp。 qYpEh5pDx2zVkum amp。 qYpEh5pDx2zVkum amp。 qYpEh5pDx2zVkum amp。qYpEh5pDx2zVkumamp。MuWFA5uxY7JnD6YWRr Wwc^vR9CpbK!zn%Mz849Gx^Gj qv^ $UE9wEwZ。ksv*3t nGK8!z89Am YWpazadNuKNamp。 ksv*3t nGK8! z89Am YWpazadNuGK8! z89Am YWpazadNuKNamp。 ksv*3t nGK8! z89Am YWpazadNuKNamp。 ksv*3t nGK8! z89Am YWpazadNuKNamp。 ksv*3t nGK8!z89Am YWpazadNuKNamp。 ksv*3t nGK8! z89Am YWpazadNuKNamp。 gTXRm 6X4NGpP$vSTTamp。 gTXRm 6X4NGpP$vSTTamp。 ksv*3t nGK8!z89Am YWpazadNuKNamp。gTXRm 6X4NGpP$vSTTamp。 gTXRm6X4NGpP$vSTTamp。 gTXRm 6X4NGpP$vSTTamp。gTXRm 6X4NGpP$vSTTamp。 QA9wkxFyeQ^! djsXuyUP2kNXpRWXm Aamp。顯示秒十位 CALL ENABLE CALL WRITE2 MOV A,B ADD A,30H MOV P0,0CFH 。未到字符串末尾繼續(xù) RET WRITE2: MOV P0,A SETB RS CLR RW CLR E CALL DELAY SETB E RET DELAY: MOV R4,05 D1: MOV R5,0FFH 18 DJNZ R5,$ DJNZ R4,D1 RET TAB: db 0c0h,0f9h,0a4h,0b0h,99h,92h,82h,0f8h db 80h,90h,88h,83h,0c6h,0a1h,86h,8eh TAB1: db 89h,86h,0c7h,0c7h,0c0h TAB2: db 0c6h,88h,0c0h TABLE1: DB 39。顯示冒號 LCALL ENABLE LCALL WRITE2 MOV A,MIN MOV B,10 DIV AB ADD A,30H MOV P0,0CBH 。若同時有其他按鍵，則等待 lcall ks jnz k4 mov r3,07h clr a mov r0,30h mov r1,31h mm1: mov a,r1 mov r0,a inc r0 inc r1 djnz r3,mm1 pop acc mov r0,a RET next1: inc R4 。定義液晶顯示端口標(biāo)號 RW BIT E BIT L50MS EQU 60H L1MS EQU 61H L250MS EQU 62H SEC EQU 65H MIN EQU 64H HOU EQU 63H 0000h ljmp main ORG 000BH LJMP TT0 ORG 001BH LJMP T1INT 1000h main:MOV SP,70H MOV P0,01H 。 d. 改進方案：若采用可以定時時間更長的單片機，可以避免所有問題。 （ 5） 在播放過程中，音樂的頻率和走的時間略微過快，分析得這可能和單片機上不同的晶振有關(guān)。另外，采用 了液晶顯示技術(shù)，簡化了硬件電路，還能顯示英文的開機畫面 等 當(dāng)然，此設(shè)計過程中碰到了很多問題。 （ 2）電路檢查 無誤后，雙擊 AT89C51 單片機，打開編輯元件對話框如下圖所示，將調(diào)試好的程序 HEX文件加載到單片機 。由于外部時鐘信號是通過一個 2 分頻觸發(fā)器后作為內(nèi)部時鐘信號的，所以對外部時鐘信號的占空比沒有特殊要求，但最小高電平持續(xù)時間和最大的低電平持續(xù)時間應(yīng)符合產(chǎn)品技術(shù)條件的要求。外形及引腳排列如圖 所示 時鐘振蕩電路 AT89C51 中有一個用于構(gòu)成內(nèi)部振蕩器的高增益反相放大器，引腳 XTAL1 和 XTAL2 分別是該放大器的輸入端和輸出端。 流程圖： 主程序開始 初始化變量及 LCD接口 初始化計數(shù)器 T0，定時器 T1 LCD 顯示英文歡迎字符 等待按鍵 歌曲號及播放時間顯示在