基于51單片機和cpld技術(shù)數(shù)字頻率計的設(shè)計-閱讀頁
2025-07-13 01:57本頁面
【正文】 V SCON,00H ；設(shè)串行口方式SEND: MOV A RO ADD A,0DH ；設(shè)置偏移值 MOVC A,A+PC MOV SBUF,A ；啟動發(fā)送WAIT: JNB TI,WAIT ；判斷1幀數(shù)據(jù)是否發(fā)送完畢 CLR TI INC RO DJNZ R7,SEND ；判斷數(shù)據(jù)是否發(fā)送完畢 CLR ；關(guān)顯示控制 RETTAB: DB 0C0H,0F9H,0A4H,0B0H,99H, ；0，1，2，3，4 DB 92H,82H,0F8H,80H,98H, ；5，6，7，8，9 DB 88H,83H,0C6H,0A1H,86H,8EH, ；A，B，C，D，E，F(xiàn) DB 7FH,0FFH,0C6,8CH,0C1H, ；.，暗，C，P，U DB 0CEH,86H,88H,0A1H,91H ；R，E，A，D，Y DB 86H，0C8H，0F8H，86H，0CEH，；E，N，T，E，R DB 0BFH，92H，0F0H， ；，S，J************************提示字裝入子程序************************LOAD: MOV R7,08H MOV R0,30H MOV A,13H ；CPUREADYLD: MOV R0,A INC R0 INC A DJNZ R7,LD RET LED熄滅子程序CLEAR: MOV R7,08H MOV R0,30H MOV A,12H ；顯示熄滅ABCL: MOV R0,A INC R0 DJNZ R7,ABCL RET************************時間值輸入子程序************************TIME: MOV R7,08H MOV R0,30H MOV A,19H ；顯示ENTERSJLP: MOV R0,A INC R0 INC R0 DJNZ R7,LP LCALL DISPBEGIN:STEB ；開鍵盤控制CLR ；并行置入鍵值 STEB ；允許串行移位 MOV SCON,00010000BWTI: JNB RI,WTI ；判斷是否接收完畢 CLR RI MOV A,0EH ；屏蔽開始鍵 MOV R3,A LCALL D_10MS ；延時，消抖 CLR STEB MOV SCON,00010000BWT2: JNB RI,WT2 CLR RI MOV A,SBUF ANL A,0EH MOV 22H,A MOV A,R3 CJNE A,22H,BEGIN CJNE A,FDH,S_10 MOV 20H,01H ； CLR ；關(guān)鍵盤控制 RET S_10 :CJNE A,FBH,S_20 MOV 20H,0AH ； 預(yù)置門時間1S CLR RETS_20: CJNE A,F7H,BEGIN MOV 20H,64H ； 預(yù)置門時間10S CLR RET*************************延時10MS子程序*************************D_10MS: MOV R7,14HLOOP1: MOV R6,0F9HLOOP2: DJNZ R6,LOOP2 DJNZ R7,LOOP1 RET************************延時100MS子程序*************************D_100MS: MOV R7,0C8HDL1: MOV R6,0F9HDL2: DJNZ R6,DL1 DJNZ R7,DL2 RET*************************字節(jié)展開子程序****************************EXTD: MOV R1,30H MOV R7,04HAGAN: MOV A,R0 MOV R3,A ANL A,00001111B MOV R1,A MOV A,R3 INC R1 ANL A,11110000B MOV R1,A INC R1 INC R0 DJNZ R7,AGAN RET*********************4字節(jié)乘法子程序FS*NX*************************MUL_SUB:MOV ADD MOV XCH XCH ADD XCH MOV MOV MOV: DEC DEC CLR XCH MOV DJNZ NCNT,NMLMN1 NCNT,BNMLMN2 A A,R0 R2,A A,R6 R0,A A,R5 R1,A R7,N CNMLMN3 A,R2 B,R1 R1 AB MOV INC MOV ADDC A,R0 R0,A INC INC DJNZ NCNT,NMLMN2 A,R0 C**********************除法子程序(FS*NX)/NS*************************NDIV A,M C MOV ADD MOV XCH MOV MOV MOV MOV R7,N CNDVMN2 :MOV SUBB A,R1 R0,A R0 R1 MOV MOV MOV MOV JC NDVMN3 R2 R7,N CNDVMN4 :MOV ADDC A,R1 R0,A R0 R1 MOV MUL MOV A,R3 R0,A R7,M CNDVMN6 :MOV RLC MOV INC DJNZ R7,NDVMN6 F0,C A,R4 R0,A A,R5 R1,A R7,N CNDVMN7 :MOV SUBB A,R1 R0,A R0 R1 JB F0,NDVMNB A,R3 R0,A R0 R7,N A,R4 R0,A A,R5 R1,A CNDVMN9 :MOV ADDC A,R1 R0,A R0 R1 MOV CLR SUBB A,N A,R3 R1,A A,R2 R1,A A,R3 R0,A160
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