單片機課程設(shè)計---基于mcs-51單片機的頻率計的設(shè)計-資料下載頁
2025-01-18 14:09本頁面
【正文】 4,A 。保存到R4 XCH A,R0 。R0指向被除數(shù)第N字節(jié),并把R0中的值放到A MOV R3,A 。把R0中的值保存至R3 MOV A,R1 。除數(shù)頭字節(jié)地址送至A MOV R5,A 。除數(shù)頭字節(jié)地址存至R5 MOV R2,00H 。CHU1 : MOV R7,N CLR CCHU2 : MOV A,@R0 SUBB A,@R1 MOV @R0,A INC R0 INC R1 DJNZ R7,CHU2 MOV A,R4 MOV R0,A MOV A,R5 MOV R1,A JC NDVMN3 。有錯位被除數(shù)比除數(shù)小 INC R2 SJMP CHU1CHU3 : MOV R7,N CLR CCHU4 : MOV A,@R0 ?；謴陀鄶?shù) ADDC A,@R1 MOV @R0,A INC R0 INC R1 DJNZ R7,CHU4 MOV A,08H MUL AB MOV B,ACHU5 : MOV A,R3 MOV R0,A MOV R7,M CLR CCHU6 : MOV A,@R0 RLC A MOV @R0,A INC R0 DJNZ R7,CHU6 MOV F0,C MOV A,R4 MOV R0,A MOV A,R5 MOV R1,A MOV R7,N CLR C RET顯示程序LOOP2: MOV A,R5 PUSH A ANL A ,0FH ADD A , 57 地址調(diào)整 MOVC A, @A+PC MOV DPTR, 8001H MOVX @DPTR, A MOV DPTR, 8002H MOV A , 0FEH MOVX @DPTR, A POP ASWAP AANL A , 0FHADD A , 45MOVC A , @A+PC MOV DPTR, 8001H MOVX @DPTR , A MOV DPTR , 8002H MOV A , 0FDH MOVX @DPTR, AMOV A,R6 PUSH A ANL A ,0FH ADD A , 33 地址調(diào)整 MOVC A , @A+PC MOV DPTR , 8001H MOVX @DPTR , A MOV DPTR, 8002H MOV A , 0FBH MOVX @DPTR A POP ASWAP AANL A , 0FHADD A , 21MOVC A , @A+PC MOV DPTR, 8001H MOVX @DPTR , A MOV DPTR, 8002H MOV A , 0F7H MOVX @DPTR , AMOV A,R7 PUSH A ANL A ,0FH ADD A , 19 地址調(diào)整 MOVC A, @A+PC MOV DPTR, 8001H MOVX @DPTR, A MOV DPTR, 8002H MOV A , 0EFH MOVX @DPTR , A POP ASWAP AANL A , 0FHADD A , 08HMOVC A , @A+PC MOV DPTR, 8001H MOVX @DPTR, A MOV DPTR , 8002H MOV A , 0DFH MOVX @DPTR, ARETTABLE: DB 3FH, 06H, 5BH, 4FH, 66H, DB 6DH 7DH 07H 7FH 6FH 。延時子程序DELAY: MOV R6,0FHDELAY1:MOV R7,0FHDELAY2:NOP DJNZ R7,DELAY2 DJNZ R6,DELAY1 RET END20
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鄂ICP備17016276號-1