【正文】 Those were broken into various shapes of stationery。總覺得自己 自己似乎應該去做點什么，或者寫點什么。課程設計說明書裝訂順序：封面、任務書、目錄、正文、評分表、附件（非 16K 大小的圖紙及程序清單）。存儲第二位商 MOV A,B SWAP A ADD A,27H MOV B,0AH DIV AB MOV 26H,A 。 圖 7 十進制數(shù)轉換為顯示代碼流程圖 開始R 0 = 50 HR 1 = 5 FHR 2 = 6DPTR = TAB R 0 → A A + DPTR → AR 0 + 1 → R 0R 1 + 1 → R 1A → R 1R 2 1 = 0 ?結束YN 14 程序的調試 編 寫的頻率計總體程序編譯成 HEX 文件，寫入 51 單片機內(nèi)， 在觀察數(shù)碼管顯示的時候，發(fā)現(xiàn)高位的“ 0”仍然能夠顯示，而通常十進制的高位的“ 0”通常是省略的。當然，這里所說的 “ 最高位 ”“ 次高位 ” 以及 “ 最低位 ” 都是針對十六進制而言的。 本課題主要是以單片機 AT89C51 為核心 , 通過計數(shù)電路 , 以及軟件程序的編寫 , 實現(xiàn)脈沖頻率的顯示。要求能夠對 0－ 250KHZ的信號頻率進行準確計數(shù)，計數(shù)誤差不超過177。要求能夠對 0－ 250KHZ 的信號頻率進行準確計數(shù)，計數(shù)誤差不超過177。 星期四 星期五上午：寫說明書、完成電子版并打印成稿。送到數(shù)碼管顯示出來。 10 第 3 章 軟件系統(tǒng)設計 應用系統(tǒng)的程序設 1s定時 采用 T0 定時 50ms ，連續(xù)循環(huán)定時 20 次即可完成 1s 定時，用一個計數(shù)單元 20H 存放循環(huán)的次數(shù)，每一次循環(huán) 20H 單元自減 1，當 20H 單元為零時則 1s 定時到時 。 第五步：方法同第四步，得到十進制數(shù)的萬位 6 和十萬位 4。存儲第四位商 MOV A,B SWAP A ANL 21H,0FH ADD A,21H MOV B,0AH DIV AB MOV 28H,A 。對 60H65H 清零 MOV R1,06H NEXT2: MOV R0,00H INC R0 DJNZ R1,NEXT2 MOV R0,50H。s plaint. In a statement the Russian side added: We found no racist insults from fans of CSKA. Age has reached the end of the beginning of a word. May be guilty in his seems to passing a lot of different life became the appearance of the same day。嫌惡過自己的怯懦，最終卻發(fā)現(xiàn)有很多 緣分 ，有很多錯過，好像冥冥之中真的已經(jīng)注定。t start planning... Those years, those days of do, finally, like youth, will end in our life. 此刻，天空是陰暗的，空氣里有著剛下過雨之后的清新因子。 Junior high school, thought to have a crush on just means that the real growth, but over the past three years later, his writing of alumni in peace, suddenly found that isn39。t appealed against the disciplinary action your employer has taken against you. However, if you win your case, the tribunal may reduce any pensation awarded to you as a result of your failure to appeal. Remember that in most cases you must make an application to an employment tribunal within three months of the date when the event you are plaining about happened. If your application is received after this time limit, the tribunal will not usually accept i. If you are worried about how the time limits apply to you, take advice from one of the anisations listed under Further help. Employment tribunals are less formal than some other courts, but it is still a legal process and you will need to give evidence under an oath or affirmation. Most people find making a claim to an employment tribunal challenging. If you are thinking about making a claim to an employment tribunal, you should get help straight away from one of the anisations listed under Further help. If you are being represented by a solicitor at the tribunal, they may ask you to sign an agreement where you pay their fee out of your pensation if you win the case. This is known as a damagesbased agreement. In England and Wales, your solicitor can39。存儲十進制數(shù)十位 MOV A,24H SWAP A ADD A,25H MOV B,0AH DIV AB MOV 24H,A 。 15 參考文獻 《單片機原理與應用》 王迎旭等編 機械工業(yè)出版社 《 51 系列單片機設計實例》 樓然苗等編 北京航空航天大學出版社 《計算機硬件技術基礎實驗教程》 黃勤等編 重慶大學出版社 《微型計算機接口技術及應用》 劉樂善主編 華中科技大學出版社 《單片微型計算機原理及接口技術》陳光東等 華中科技大學出版社 附錄 1 源程序清單： ADD A,25H MOV B,0AH DIV AB MOV 24H,A 。該本次頻率計系待測的時鐘信號的最高頻率為460800Hz，對應的十六進制數(shù)為 70800H，這里就以 70800H 轉換為十進制數(shù)為例來說明這種算法。 各部分方案選定、功能 單片機部分 本次設計采用了 AT89C51 單片機 , AT89C51是一種帶 4K字節(jié)閃爍可編程可擦除只讀存儲器的低電壓，高性能 CMOS8位微處理器。并且引導一種創(chuàng)新的思維，把學到的知識應用到日 常生活當中。 1 主要設計條件 1. MCS51 單片機實驗操作臺 1 臺； 2. PC 機及單片機調試軟件； 3. 單片機應用系統(tǒng)板 1 套； 4. 制作工