片機(jī)上下限溫度報(bào)警器課程設(shè)計(jì)-閱讀頁
2025-06-24 06:29本頁面
【正文】 EQU 36H TEMPER_H EQU 35H TEMPER_NUM EQU 59H TEMPER_XIAO EQU 60H TEMP_TH EQU 27H 。低溫報(bào)警值存放單元 TEMP_ZH DATA 24H 。主控制程序； MAIN: LCALL GET_TEMPER LCALL TEMPER_COV LCALL TBCD_DISP LCALL DISPLAY LCALL KEY LCALL ALLERT LJMP MAIN ALLERT: MOV A,TEMP_TH SUBB A,TEMPER_NUM 。借位標(biāo)志位 C=1，轉(zhuǎn) MOV A,TEMPER_NUM SUBB A,TEMP_TL 。借位標(biāo)志位 C=1，轉(zhuǎn) RET CHULI1: SETB LCALL WA CLR RET 18 。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 KEY1 S1: LCALL DELAY3 。等待按鍵抬起 J0: JB ,KEY1 LCALL LOOK_ALARM SJMP J0 J1: JB ,KEY1 LCALL LOOK_ALARM SJMP J1 LOOK_ALARM: MOV A,TEMP_TH 。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 。========================================================== 。========================================================== DISPLAY: MOV R0,66H MOV R2,4 MOV A,R0 ORL A,20H MOV P1,A DEC R0 LCALL WAIT 21 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 。讀出轉(zhuǎn)換后的溫度值 。READ_1820 RET 。將溫度高地位讀出 MOV R1,36H 。 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 25 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_BCD1 TEMPER_COV1: MOV A,TEMPER_H ANL A,07H SWAP A ORL A,TEMPER_NUM MOV TEMPER_NUM,A LCALL BIN_BCD RET BIN_BCD: 26 MOV DPTR,TEMP_TAB MOV A,TEMPER_NUM MOVC A,A+DPTR MOV TEMPER_NUM,A RET BIN_BCD1: MOV DPTR,TEMP_TAB MOV A,TEMPER_XIAO MOVC A,A+DPTR MOV TEMPER_XIAO,A RET TBCD_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。DS18B20 初始化程序 INIT_1820: SETB DQ NOP CLR DQ MOV R0,250 28 TSR1: DJNZ R0,TSR1 SETB DQ MOV R0,07H TSR2: DJNZ R0,TSR2 JB DQ,TSR3 LJMP TSR4 TSR3: SETB FLAG LJMP TSR5 TSR4: CLR FLAG LJMP TSR7 TSR5: MOV R0,06BH TSR6: DJNZ R0,TSR6 TSR7: SETB DQ RET 。 指導(dǎo)教師評語 : 31 指導(dǎo)教師（簽名） : 20 年 月 日
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