基于單片機(jī)的病床呼叫系統(tǒng)doc-資料下載頁
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【正文】 單片機(jī)應(yīng)用技術(shù)與實(shí)訓(xùn)》[M]. 北京：清華大學(xué)出版社，2004：130133.[11]胡漢才.《單片機(jī)原理及接口技術(shù)》[M]. 北京：清華大學(xué)出版社，1995：111123..附錄附錄A：原理圖附錄B：源程序ORG 0000HLJMP MAINORG 0003HLJMP INT0ORG 001BHLJMP INT1ORG 0100HMAIN: SETB EA SETB EX0 SETB ET1 MOV SCON, 00H MOV DPTR,0FFFFFH MOV A,89H MOVX @DPTR,AKEY: ACALL KS1 JNZ LK1NI: ACALL DELAY AJMP KEYLK1: ACALL DELAY ACALL DELAY ACALL KS1 JNZ LK2 AJMP NI LK2: MOV R2,0FEH MOV R4,00H LK4:MOV DPTR,0FFFCH MOV A,R2 MOVX @DPTR,A INC DPL INC DPL MOVX A,@DPTR JB ,L1 MOV A,00H LJMP LKP L1:JB , L2 MOV A,08H LJMP LKP L2:JB , L3 MOV A,16 LJMP LKP L3:JB ,L4 MOV A,24 LJMP LKP L4:JB ,L5 MOV A,32 LJMP LKP L5:JB ,L6 MOV A,40 LJMP LKP L6:JB ,L7 MOV A,48 LJMP LKP L7:JB , NEXT MOV A,56 LKP:ADD A,R4 PUSH ACC LK3:ACALL DELAY ACALL KS1 JNZ LK3 POP ACC LJMP L8NEXT:INC R4 MOV A,R2 JNB ,KND RL A MOV R2,A AJMP LK4KND:AJMP KEYKS1: MOV DPTR,0FFFCH MOV A,00H MOVX @DPTR,A INC DPL INC DPL MOVX A,@DPTR CPL A RETL8: MOV 40H,A MOV B,0AH DIV AB MOV 50H,A MOV 51H,B SETB RS0 MOV R2,02 MOV R0,51HDL0:MOV A,@R0 MOV DPTR,TAB MOVC A,@A+DPTR MOV SBUF,ADL1:JNB TI,DL1 CLR TI DEC R0 DJNZ R2,DL0 CLR RS0 MOV TMOD,10H MOV TH1,0D8H MOV TL1,0F0H SETB EA SETB ET1 SETB TR1 MOV 52H,100 MOV 53H,3 LJMP MAININT1:MOV TH1,0D8H MOV TL1,0F0H DJNZ 52H,TT1 MOV 52H,100 DJNZ 53H,TT1 LJMP TT2TT1:CPL RETITT2: CLR TR1 CLR RETIINT0: CLR TR1 CLR MOV SCON, 00H MOV SBUF, 0FFHDL2:JNB TI,DL2 CLR TI MOV SBUF, 0FFHDL3:JNB TI,DL3 CLR TI RETITAB: DB 0C0H,0F9H,0A4H,0B0H,99H。 DB 92H,82H,0F8H,80H,90H。DELAY: MOV R7, 3DL4: MOV R6,20DL5: MOV R5,250DL6: DJNZ R5,DL6 DJNZ R6,DL5 DJNZ R7,DL4 RETEND
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