畢業(yè)設(shè)計(jì)-基于單片機(jī)多點(diǎn)溫度檢測(cè)-資料下載頁(yè)
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【正文】 DL1: JNB T1,DL1。是否輸出玩完個(gè)字節(jié) CLR TI 。清發(fā)送完標(biāo)志 , INC R1 畢業(yè)設(shè)計(jì) 基于單片機(jī)多點(diǎn)溫度檢測(cè) 20 DJNZ R2,DL0。4 個(gè)數(shù)是否都顯示完了？ RET TAB1: DB 0C0H,0F9H,0A4H,0B0H,99H， 92H,82H,0F8H,80H,90H TAB2: DB 00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H DB 00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H DB 19H,19H,19H,19H,19H,19H,19H,19H,19H,19H,19H,19H,19H,19H DB 19H,19H,19H,19H,19H,19H,19H,19H,19H,19H,19H DB 32H,32H,32H,32H,32H,32H,32H,32H,32H,32H,32H,32H,32H,32H DB 32H,32H,32H,32H,32H,32H,32H,32H,32H,32H,32H DB 4BH,4BH,4BH,4BH,4BH,4BH,4BH,4BH,4BH,4BH,4BH,4BH,4BH,4BH DB 4BH,4BH,4BH,4BH,4BH,4BH,4BH,4BH,4BH DB 64H,64H,64H,64H,64H,64H,64H,64H,64H,64H,64H,64H,64H,64H DB 64H,64H,64H,64H,64H,64H,64H,64H,64H DB 7DH,7DH,7DH,7DH,7DH,7DH,7DH,7DH,7DH,7DH,7DH,7DH,7DH,7DH DB 7DH,7DH,7DH,7DH,7DH,7DH,7DH,7DH,7DH DB 96H,96H,96H,96H,96H,96H,96H,96H,96H,96H,96H,96H,96H,96H DB 96H,96H,96H,96H,96H,96H,96H,96H,96H DB 0AFH,0AFH,0AFH,0AFH,0AFH,0AFH,0AFH,0AFH,0AFH,0AFH,0AFH DB 0AFH,0AFH,0AFH,0AFH,0AFH,0AFH,0AFH,0AFH,0AFH,0AFH,0AFH,0AFH DB 0C8H,0C8H,0C8H,0C8H,0C8H,0C8H,0C8H,0C8H,0C8H,0C8H,0C8H DB 0C8H,0C8H,0C8H,0C8H,0C8H,0C8H,0C8H,0C8H,0C8H,0C8H,0C8H,0C8H DB 0E1H,0E1H,0E1H,0E1H,0E1H,0E1H,0E1H,0E1H,0E1H,0E1H,0E1H DB 0E1H,0E1H,0E1H,0E1H,0E1H,0E1H,0E1H,0E1H,0E1H,0E1H,0E1H,0E1H DB 0FAH,0FAH,0FAH,0FAH,0FAH,0FAH,0FAH,0FAH,0FAH,0FAH,0FAH DB 0FAH,0FAH,0FAH,0FAH,0FAH,0FAH,0FAH,0FAH,0FAH,0FAH,0FAH,0FAH 鍵盤掃描程序 :KEYSCAN: MOV R4,00H。R4 寄存器清零 MOV P2,0FH。P2 口的低 4 位置 1 MOV A,P2。輸入怕口的數(shù)據(jù) ANL A,0FH。屏蔽高四位 CJNE A,0FH,DELAY。判斷有沒(méi)有鍵按下，若有調(diào)用延時(shí) SJMP RETU。轉(zhuǎn)返回 DELAY: ACALL DEL10。10ms 延時(shí)消除抖動(dòng) MOV A,P2。重新輸入 P2 口的數(shù)據(jù) ANL A,0FH。屏蔽高 4 位 CJNE A,0FH。PROG。再次判斷是否真有鍵按下 SJMP RETU。沒(méi)有返回 PROG: MOV R2,04H。向 R2 送行掃描次數(shù) MOV R3,10H。R3 送行線初值 SCAN: MOV A,R3 CPL A MOV P1,A。輸出第一行為低電平 MOV A,P2。輸入掃描結(jié)果列線值 ANL A,0FH。屏蔽高 4 位 CJNE A,0FH,FN。判斷是否為本鍵值，是轉(zhuǎn)鍵值處理 畢業(yè)設(shè)計(jì) 基于單片機(jī)多點(diǎn)溫度檢測(cè) 21 MOV A,R3 RL A。修改行線狀態(tài)使下一行為低電平 MOV R3,A。保存修改后的值 DJNZ R2,SCAN。掃描次數(shù)減 1，若沒(méi)完成繼續(xù)掃描 SJMP RETU FN: CPL A ANL A,0FH。A 的低 4 位為鍵所在的列號(hào) ADD A,R3。列號(hào) +首鍵號(hào)得按鍵值 MOV R4,A。按鍵值送 R4 保存 RETU: RET DEL10: MOV R7,20H D1: MOV R6,248 DJNZ R6,$ DJNZ R7,D1 RET 報(bào)警系統(tǒng) :WARN: MOV A,R4 CLR C SUBB A,50H。設(shè)定值 —— 實(shí)測(cè)值 JNC WARN1。小于設(shè)定溫下限溫值，報(bào)警 ACALL KEYSCAN。調(diào)用鍵盤掃描子程序 MOV A,R4 CLR C SUBB A,50H JC WARN1。大于設(shè)定上限值，報(bào)警 SJMP $ WARN1: CPL RET END
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