【正文】 多用戶電能表的設(shè)計 系統(tǒng)的總程序流程圖如上圖所示。//LED 數(shù)據(jù) PB0 EQU PB1 EQU PB2 EQU PB3 EQU PB4 EQU PB5 EQU PB6 EQU PB7 EQU ORG 00H LJMP MAIN ORG 0BH LJMP T0_INT ORG 0100H ////////主程序 /// 課程設(shè)計 多用戶電能表的設(shè)計 MAIN: LCALL CHUSHI LCALL RD01 MAIN1: MOV 20H,P2 。顯示戶名 LCALL XS LCALL XS INC R0 INC R7 LCALL DELAY CJNE R7, 9, LOOP LCALL WR01 LJMP BEGIN ////////初始化程序 ////// CHUSHI: //MOV SFRPGEN,01H MOV SFRPAGE,0FH MOV P1MDIN,0FFH MOV P1MDOUT,0EFH 。判斷外部脈沖的狀態(tài) NEXT5: JNB , BJ6 。若不等則相應的用戶的脈沖數(shù)加一 JMP NEXT2 BJ3: JB PB2,ADD3 JMP NEXT3 BJ4: JB PB3,ADD4 JMP NEXT4 BJ5: JB PB4,ADD5 JMP NEXT5 BJ6: JB PB5,ADD6 JMP NEXT6 BJ7: JB PB6,ADD7 JMP NEXT7 BJ8: JB PB7,ADD8 JMP DONE ADD1: INC 60H JMP NEXT1 ADD2: INC 61H JMP NEXT2 ADD3: INC 62H JMP NEXT3 ADD4: INC 63H JMP NEXT4 ADD5: INC 64H JMP NEXT5 ADD6: INC 65H JMP NEXT6 ADD7: INC 66H JMP NEXT7 ADD8: INC 67H DONE:POP ACC RETI ////////顯示子程序 ////////// //顯示子程序 XS: PUSH ACC MOV DPTR,TAB 課程設(shè)計 多用戶電能表的設(shè)計 MOVC A,A+DPTR MOV R4,08h RR1: RRC A JC SET1 JNC SET0 SET1: CLR CLK SETB DATE SETB CLK DJNZ r4,RR1 JMP RETURN SET0: CLR CLK CLR DATE SETB CLK DJNZ R4,RR1 RETURN: POP ACC RET ///////延時子程序 /////// DELAY: MOV R2,0ffH MOV R3,0ffH MOV R5,07H LOOP0001 : NOP DJNZ R2,CC01 LJMP CC1 CC01: LJMP LOOP0001 CC1: DJNZ R3,CC02 LJMP CC2 CC02: LJMP LOOP0001 CC2: DJNZ R5,CC03 LJMP CC3 CC03: LJMP LOOP0001 CC3: RET ////////往 XRAM 寫數(shù)據(jù)子程序 //////// WR01: MOV EMI0CF ,20H MOV DPTR,0100H MOV R0,60H MOV R7,00H LOOP2: MOV A,R0 MOVX DPTR , A 課程設(shè)計 多用戶電能表的設(shè)計 INC DPTR INC R0 INC R7 CJNE R7,08,LOOP2 RET ///////讀 XRAM 的數(shù)據(jù) ////// RD01: MOV EMI0CF , 00H MOV DPTR , 0100H MOV R7 , 00H MOV R0 , 60H LOOP3 : MOVX A,DPTR MOV R0 , A INC DPTR INC R7 CJNE R7 , 08H , LOOP3 RET ///////TAB 數(shù)據(jù)列表 //// TAB: DB 88H,0EBH,4CH,49H,2BH,19H,18H,0CBH,08H,09H,7FH END 。判斷外部脈沖的狀態(tài) NEXT3: JNB , BJ4