實(shí)驗(yàn)一應(yīng)用系統(tǒng)開(kāi)發(fā)過(guò)程及常用指令實(shí)-單片機(jī)-資料下載頁(yè)
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【正文】 @R0 MOV DPTR,DDFF MOVC A,@A+DPTR MOV R1,22H MOVX @R1,A MOV A,30H RR A MOV 30H,A DEC 31H MOV A,0FFH MOVX @R1,A DJNZ R7,SSE1 DJNZ R5,SSE2 CLR RS1 RETDDFF: DB 0C0H,0F9H,0A4H,0B0H,99H,92H,82H,0F8H,80H,90H DB 88H,83H,0C6H,0A1H,86H,8EH,0FFH,0CH,89H,0DEH ORG 1D00HX3: MOV R4,A MOV R0,59H MOVX A,@R0 MOV R1,A MOV A,R4 MOV @R1,A CLR A POP DPH POP DPL MOVC A,@A+DPTR INC DPTR CJNE A,01H,X30 CLR A MOVC A,@A+DPTRX31: MOVX @R0,A INC DPTR PUSH DPL PUSH DPH RETX30: DEC R1 MOV A,R1 SJMP X31X2: MOV R6,50HX0: ACALL XLE JNB ,XX0 DJNZ R6,X0 MOV R6,20H MOV R0,59H MOVX A,@R0 MOV R0,A MOV A,@R0 MOV R7,A MOV A,10H MOV @R0,AX1: ACALL XLE JNB ,XX1 DJNZ R6,X1 MOV A,R7 MOV @R0,A SJMP X2XX1: MOV R6,A MOV A,R7 MOV @R0,A MOV A,R6XX0: RETXLE: ACALL DIS ACALL KEY MOV R4,A MOV R1,48H MOVX A,@R1 MOV R2,A INC R1 MOVX A,@R1 MOV R3,A MOV A,R4 XRL A,R3 MOV R3,04H MOV R4,02H JZ X10 MOV R2,88H MOV R4,88HX10: DEC R4 MOV A,R4 XRL A,82H JZ X11 MOV A,R4 XRL A,0EH JZ X11 MOV A,R4 ORL A,R4 JZ X12 MOV R4,20H DEC R2 SJMP X13X12: MOV R4,0FHx11: MOV R2,04H MOV R4,03HX13: MOV R1,48H MOV A,R2 MOVX @R1,A INC R1 MOV A,R3 MOVX @R1,A MOV A,R4 RETLS3: DB 07H,04H,08H,05H,09H,06H,0AH DB 0BH,01H,00H,02H,0FH,03H,0EH DB 0CH,0DHDIS: PUSH DPH PUSH DPL SETB RS1 MOV R0,7EH MOV R2,20H MOV R3,00H MOV DPTR,LS0LS2: MOV A,@R0 MOVC A,@A+DPTR MOV R1,22H MOVX @R1,A MOV A,R2 DEC R1 MOVX @R1,A DEC R0LS1: DJNZ R3,LS1 CLR C RRC A MOV R2,A JNZ LS2 INC R1 MOV A,0FFH MOVX @R1,A CLR RS1 POP DPL POP DPH RETLS0: DB 0C0H,0F9H,0A4H,0B0H,99H,92H DB 82H,0F8H,80H,90H,88H,83H,0C6H DB 0A1H,86H,8EH,0FFH,0CH,89H,7FH,0BFHKEY: SETB RS1 MOV R2,0FEH MOV R3,08H MOV R0,00HLP1: MOV A,R2 MOV R1,21H MOVX @R1,A RL A MOV R2,A MOV R1,23H MOVX A,@R1 CPL A ANL A,0FH JNZ LP0 INC R0 DJNZ R3,LP1 MOVX A,@R1 JB ,XP33 MOV A,19H SJMP XP3XP33: MOV A,20HXP3: CLR RS1 RETLP0: CPL A JB ,XP0 MOV A,00H SJMP LPPXP0: JB ,XP1 MOV A,08H SJMP LPPXP1: JB ,XP2 MOV A,10H SJMP LPPXP2: JB ,XP33 MOV A,18HLPP: ADD A,R0 CLR RS1 CJNE A,10H,LX0LX0: JNC XP35 MOV DPTR,LS3 MOVC A,@A+DPTRXP35: RETLCK0: LCALL X1 JNC LCK1 LCALL X3 MOV R1,7EH SJMP LCK0LCK1: CJNE A,16H,LCK0 MOV A,7AH SWAP A ORL A,79H MOV 22H,A CJNE A,60H,LCK2 LCK2: JNC EXIT MOV A,7CH SWAP A ORL A,7BH MOV 21H,A CJNE A,60H,CLK3CLK3: JNC EXIT MOV A,7EH SWAP A ORL A,7DH MOV 20H,A CJNE A,24H,CLK4CLK4: JNC EXIT RETEXIT: AJMP LCK0 END四、實(shí)驗(yàn)步驟：熟悉電腦時(shí)鐘硬件電路的實(shí)現(xiàn)方法２、進(jìn)入Win51組合軟件的操作環(huán)境３、在Win51組合軟件環(huán)境中, 編輯源程序； ４、源程序編輯好后,就可對(duì)源文件進(jìn)行編譯,生成目標(biāo)代碼并傳送到開(kāi)發(fā)系統(tǒng)的RAM中.５、運(yùn)行、調(diào)試程序和結(jié)果檢查五、思考題：電子鐘的走時(shí)精度和程序中那些常數(shù)有關(guān)？六、預(yù)習(xí)要求：⑴分析電腦時(shí)鐘程序的設(shè)計(jì)思路，⑵寫(xiě)出74LS27545LED引腳圖七、實(shí)驗(yàn)報(bào)告：1寫(xiě)出原程序的注釋語(yǔ)句，并說(shuō)明其功能， 2回答思考題?！秵纹瑱C(jī)原理及應(yīng)用》實(shí)驗(yàn)指導(dǎo)書(shū)計(jì)算機(jī)與控制學(xué)院自動(dòng)化系2003年1
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