數(shù)字溫度計(jì)方案設(shè)計(jì)-在線瀏覽
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【正文】 AJMP NEXTSETB_FLAG: SETB FLAGNEXT: MOV R7, 120 DJNZ R7, $ SETB DATA_BUS JNB FLAG, RESET RET。=============================寫命令===========================WRITE: SETB DATA_BUS MOV R6, 8 CLR CWRITING: CLR DATA_BUS MOV R7, 5 DJNZ R7, $ RRC A MOV DATA_BUS, C MOV R7, 30H DJNZ R7, $ SETB DATA_BUS NOP DJNZ R6, WRITING RET。循環(huán)顯示段位===========================DISPLAY: MOV R4, 200DIS_LOOP: MOV A, DIS_DP MOV P2, 0FFH MOV P0, A CLR LCALL DELAY2MS MOV A, DIS_GE MOV P2, 0FFH MOV P0, A SETB CLR LCALL DELAY2MS MOV A, DIS_SHI MOV P2, 0FFH MOV P0, A CLR LCALL DELAY2MS MOV A, DIS_BAI MOV P2, 0FFH MOV P0, A MOV A, TEMP_BAI CJNE A, 0,SKIP AJMP NEXTT SKIP: CLR LCALL DELAY2MSNEXTT: NOP DJNZ R4, DIS_LOOP RET============================= 讀命令===========================READ: SETB DATA_BUS MOV R0, TEMP_L MOV R6, 8 MOV R5, 2 CLR CREADING: CLR DATA_BUS NOP NOP SETB DATA_BUS NOP NOP NOP NOP MOV C, DATA_BUS RRC A MOV R7, 30H DJNZ R7, $ SETB DATA_BUS DJNZ R6, READING MOV R0, A INC R0 MOV R6, 8 SETB DATA_BUS DJNZ R5, READING RET=============================數(shù)據(jù)處理===========================PROCESS: MOV R7, TEMP_L MOV A, 0FH ANL A, R7 MOV TEMP_DP,A MOV R7, TEMP_L MOV A, 0F0H ANL A, R7 SWAP A MOV TEMP_L, A MOV R7, TEMP_H MOV A, 0FH ANL A, R7 SWAP A ORL A, TEMP_L MOV B, 64H DIV AB MOV TEMP_BAI,A MOV A, 0AH XCH A, B DIV AB MOV TEMP_SHI,A MOV TEMP_GE,B MOV A, TEMP_DP MOV DPTR, TABLE_DP MOVC A, A+DPTR MOV DPTR, TABLE_INTER MOVC A, A+DPTR MOV DIS_DP, A MOV A, TEMP_GE MOV DPTR, TABLE_INTER MOVC A, A+DPTR MOV DIS_GE, A MOV A, TEMP_SHI MOV DPTR, TABLE_INTER MOVC A, A+DPTR MOV DIS_SHI, A MOV A, TEMP_BAI MOV DPTR, TABLE_INTER MOVC A, A+DPTR MOV DIS_BAI ,A RETDELAY2MS: MOV R6, 3LOOP3: MOV R5, 250 DJNZ R5, $ DJNZ R6, LOOP3 RETTABLE_DP: DB 00H,01H,01H,02H,03H,03H,04H,04H,05H,06H DB 06H,07H,08H,08H,09H,09HTABLE_INTER: DB 03FH,006H,05BH,04FH,066H DB 06DH,07DH,07H,07FH,06FH END七、元件清單DS18B201AT89S511四位八段共陰極數(shù)碼管1NPN三極管41K電阻9電解電容（22uf）1電容（22nf）212MHZ晶振1排阻（）1開關(guān)1按鈕1八、仿真及調(diào)試過程PROTEUS仿真電路圖：電路的PCB制板：Protel電路圖：Protel pcb圖：九、參考文獻(xiàn)[1]孫育才.《單片微型計(jì)算機(jī)及其應(yīng)用》.[2]沈德金 陳粵初.《單片機(jī)接口電路與應(yīng)用程序?qū)嵗?. [3]潘新民 王燕芳.《微型計(jì)算機(jī)控制技術(shù)》.電子工業(yè)出版社2003 [4]（簡明修訂版）.杭州：北京航空航天大學(xué)出版社，1998[5]［Ｍ］.北京：北京航空航天大學(xué)出版社，1994[6]（第三版）. 北京：高等教育出版社，1989[7]［J］.電工技術(shù)，1999.[8]王勇 葉敦范.《基于AT89S51 的便攜式實(shí)時溫度檢測儀》[J].選自《儀表技術(shù)與傳感器》.2006袁節(jié)膅薂羄肅蒃
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