單片機(jī)上下限溫度報(bào)警器課程設(shè)計(jì)(參考版)
2025-01-19 11:06本頁面
【正文】 指導(dǎo)教師評(píng)語:指導(dǎo)教師（簽名）: 20 年 月 日31。DS18B20初始化程序INIT_1820: SETB DQ NOP CLR DQ MOV R0,250TSR1: DJNZ R0,TSR1 SETB DQ MOV R0,07HTSR2: DJNZ R0,TSR2 JB DQ,TSR3 LJMP TSR4TSR3: SETB FLAG LJMP TSR5TSR4: CLR FLAG LJMP TSR7TSR5: MOV R0,06BHTSR6: DJNZ R0,TSR6TSR7: SETB DQ RET 。 將ds18b20中讀出溫度數(shù)據(jù)進(jìn)行轉(zhuǎn)換TEMPER_COV:MOV A,0F0H ANL A,TEMPER_L SWAP A MOV TEMPER_NUM,A MOV A,TEMPER_L JNB ,TEMPER_COV1 SETB MOV A,TEMPER_L ANL A,0FH MOV B,100 MUL AB MOV R0,A MOV A,B ANL A,0FH SWAP A MOV B,A MOV A,R0 ANL A,0FH ORL A,B MOV TEMPER_XIAO,A LCALL BIN_BCD1TEMPER_COV1: MOV A,TEMPER_H ANL A,07H SWAP A ORL A,TEMPER_NUM MOV TEMPER_NUM,A LCALL BIN_BCD RETBIN_BCD: MOV DPTR,TEMP_TAB MOV A,TEMPER_NUM MOVC A,A+DPTR MOV TEMPER_NUM,A RETBIN_BCD1: MOV DPTR,TEMP_TAB MOV A,TEMPER_XIAO MOVC A,A+DPTR MOV TEMPER_XIAO,A RETTBCD_DISP: MOV A,TEMPER_NUM ANL A,0FH MOV 63H,A MOV A,TEMPER_NUM ANL A,0F0H SWAP A MOV 64H,A MOV A,TEMPER_XIAO ANL A,0FH MOV 65H,A。將溫度高地位讀出 MOV R1,36H 。READ_1820 RET。讀出轉(zhuǎn)換后的溫度值。========================================================== DISPLAY: MOV R0,66H MOV R2,4 MOV A,R0 ORL A,20H MOV P1,A DEC R0 LCALL WAIT MOV A,R0 ORL A,10H MOV P1,A DEC R0 LCALL WAIT MOV A,R0 ORL A,80H MOV P1,A DEC R0 LCALL WAIT MOV A,R0 ORL A,40H MOV P1,A LCALL WAIT RET 。==========================================================。加載TL數(shù)據(jù) MOV TEMP_TL ANL A,0FH MOV 65H,A MOV A,TEMP_TL ANL A,0F0H SWAP A MOV 66H,A CALL DISPLAY 。等待按鍵抬起J0: JB ,KEY1 LCALL LOOK_ALARM SJMP J0J1: JB ,KEY1 LCALL LOOK_ALARM SJMP J1LOOK_ALARM: MOV A,TEMP_TH 。判斷是否有控制鍵按下 MOV TEMP_TL ,25H KEY1: JNB ,S1 JNB ,S2 LCALL GET_TEMPER LCALL TEMPER_COV LCALL TBCD_DISP LCALL DISPLAY LCALL ALLERT LJMP KEY1S1: LCALL DELAY3 。借位標(biāo)志位C=1，轉(zhuǎn) RET CHULI1: SETB
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