【正文】 JNC SETONE1 SETB 00HL3: MOV @R1,A 。即時(shí)刷新顯示緩沖區(qū) INC R1 MOV 3AH,0FFH DJNZ R7,SETONE MOV R7,4 MOV R1,30H CLR 00H 。CLR 01H CLR RS0 CLR RS1 PUSH PSW SETB RS1 ACALL BCDHEX 。16字節(jié)BCD變二進(jìn)制 ACALL SUBBV 。*5/8 POP PSW CLR A RET。**********加電流JIA: MOV 3AH,0FFH MOV A,DISP3 INC A MOV DISP3,A CJNE A,10,OUT MOV DISP3,0 MOV A,DISP2 INC A MOV DISP2,A CJNE A,10,OUT MOV DISP2,0 MOV A,DISP1 INC A MOV DISP1,A CJNE A,10,OUT MOV DISP1,0 MOV A,DISP0 INC A MOV DISP0,A CJNE A,2,OUT MOV DISP0,1 MOV DISP1,9 MOV DISP2,9 MOV DISP3,9OUT: PUSH PSW SETB RS1 ACALL BCDHEX ACALL SUBBV POP PSW CLR A RET。**********減電流JIAN: MOV 3AH,0FFH MOV A,DISP3 DEC A MOV DISP3,A CJNE A,0FFH,OUT1 MOV DISP3,9 MOV A,DISP2 DEC A MOV DISP2,A CJNE A,0FFH,OUT1 MOV DISP2,9 MOV A,DISP1 DEC A MOV DISP1,A CJNE A,0FFH,OUT1 MOV DISP1,9 MOV A,DISP0 DEC A MOV DISP0,A CJNE A,0FFH,OUT1 MOV DISP0,0 MOV DISP1,0 MOV DISP2,0 MOV DISP3,0OUT1: PUSH PSW SETB RS1 ACALL BCDHEX ACALL SUBBV POP PSW CLR A RETBCDHEX: MOV R7,03H MOV R0,DISP0 CLR A MOV R1,A MOV R2,A MOV R4,A MOV R5,A MOV R3,A MOV A,@R0 MOV R1,A CLR CLOOP16: MOV A,R1 ADD A,R1 MOV R1,A MOV A,R2 ADDC A,R2 MOV R2,A MOV A,R1 MOV R3,A MOV A,R2 MOV R4,A MOV A,R1 ADD A,R1 MOV R1,A MOV A,R2 ADDC A,R2 MOV R2,A MOV A,R1 ADD A,R1 MOV R1,A MOV A,R2 ADDC A,R2 MOV R2,A MOV A,R1 ADD A,R3 MOV R1,A MOV A,R2 ADDC A,R4 MOV R2,A INC R0 MOV A,@R0 MOV R5,A MOV A,R1 ADD A,R5 MOV R1,A MOV A,R2 ADDC A,00H MOV R2,A MOV R5,00H DJNZ R7,LOOP16 RETSUBBV: MOV 3EH,R2 MOV 3FH,R1 MOV R4,3EH 。高位 MOV R3,3FH 。低位 MOV R2,DATB1。********************************乘5MULI: MOV A,R2 。取乘數(shù) MOV B,R3 。取被乘數(shù)低位 MUL AB 。計(jì)算(R3)*(R2) MOV R5,A 。 乘積的低位送R5 MOV R6,B 。 乘積的高位送R6 MOV A,R2 ?；謴?fù)乘數(shù) MOV B,R4 。取被乘數(shù)高位 MUL AB 。計(jì)算(R4)*(R2) ADD A,R6 。(R3)*(R2)積的高位加(R4)*(R2)積的低位 MOV R6,A 。存結(jié)果 MOV A,B 。取(R4)*(R2) ADDC A,00H 。 (R4)*(R2)積的高位加低位進(jìn)位 MOV R7,A 。存最高位 。RET MOV A,R6 MOV R1,A MOV A,R5 MOV R0,A。*******************除8 MOV R2,00H MOV R3,DATB MOV R4,00H MOV R5,00H MOV R7,10HCHU5: MOV A,R0 ADD A,R0 MOV R0,A MOV A,R1 ADDC A,R1 MOV R1,A MOV A,R2 ADDC A,R2 MOV R2,A MOV A,R4 ADD A,R4 MOV R4,A MOV A,R5 ADDC A,R5 MOV R5,A CJNE R2,DATB,LOOP07LOOP07: JC LOOP17 MOV A,R2 SUBB A,R3 MOV R2,A MOV A,R4 ADD A,01H MOV R4,A MOV A,R5 MOV R5,ALOOP17: DJNZ R7,CHU5 MOV 3CH,R5 。裝入DA轉(zhuǎn)換 MOV 3DH,R4 RETDELAY1: MOV R4,100 。消抖延時(shí)20MS 70 10MSDEL21: MOV R5,100DEL11: DJNZ R5,$ DJNZ R4,DEL21 RET END附錄2總電路圖共 41 頁(yè) 第 41 頁(yè)