單片機AD模數(shù)轉(zhuǎn)換實驗報告

單片機AD模數(shù)轉(zhuǎn)換實驗報告一、實驗目的與要求1、掌握單片機與ADC0809的接口設計方法。2、掌握Proteus軟件與Keil軟件的使用方法。設計要求。1、用Proteus軟件畫出電路原理圖,在單片機的外部擴展片外三總線,并通過片外三總線與0809接口。2、在0809的某一模擬量輸入通道上接外部模擬量。3、在單片機的外部擴展數(shù)碼管顯示器。4、分別采用延時與查詢的方法編寫A/D轉(zhuǎn)換程序。5、啟動A/D轉(zhuǎn)換,將輸入模擬量的轉(zhuǎn)換結(jié)果在顯示器上顯示。電路原理圖。單片機AD模數(shù)轉(zhuǎn)換實驗報告全文共5頁，當前為第1頁。圖1、電路仿真圖單片機AD模數(shù)轉(zhuǎn)換實驗報告全文共5頁，當前為第1頁。實驗程序流程框圖與程序清單。查詢法: ORG 0000HSTART: LJMP MAIN ORG 0100HMAIN: MOV SP, #2FHNT: MOV DPTR, #0FF78H MOVX @DPTR, ALOOP: JB P3、3, LOOP MOVX A, @DPTR MOVB, #51 DIV AB MOVR0, A MOVA, B MOV B, #5 DIV AB MOVR1, A MOVR2, B LCALLDIR SJMP NTDIR: MOV R7, #0 SJMP LOOP1BH: MOV A, R1 MOV R2, ALOOP1: MOV DPTR, #WK MOV A, R7 MOVC A, @A+DPTR MOV P2, A MOV DPTR, #DK MOV A, R2 MOVC A, @A+DPTR MOV P1, A LCALL DELAY INC R7 CJNE R7, #2, BH MOV DPTR, #WK MOV A, R7 MOVC A, @A+DPTR MOV P2, A MOV DPTR, #DK MOV A, R0 MOVC A, @A+DPTR ANL A, #7FH MOV P1, A LCALL DELAY RETDELAY: MOV R5, #01HDL1: MOV R4, #8EHDL0: MOV R3, #02H DJNZ R3, $ DJNZ R4, DL0 DJNZ R5, DL1 RETWK: DB 10H DB 20H DB 40H單片機AD模數(shù)轉(zhuǎn)換實驗報告全文共5頁，當前為第2頁。DK: DB 0C0H,0F9H,0A4H,0B0H,99H,92H,82H,0F8H,80H,90H單片機AD模數(shù)轉(zhuǎn)換實驗報告全文共5頁，當前為第2頁。 END2、延時法: ORG 0000HSTART: LJMP MAIN ORG 0100HMAIN: MOV SP, #2FHLOOP: MOV DPTR, #0FF78H MOVX @DPTR, A LCALL DELAY MOVX A, @DPTR MOVB, #51 DIV AB MOVR0, A MOVA, B MOV B, #5 DIV AB MOVR1, A MOVR2, B LCALLDIR SJMP LOOPDIR: MOV R7, #0 SJMP LOOP1BH: MOV A, R1 MOV R2, ALOOP1: MOV DPTR, #WK MOV A, R7 MOVC A, @A+DPTR MOV P2, A MOV DPTR, #DK MOV A, R2 MOVC A, @A+DPTR MOV P1, A LCALL DELAY INC R7 CJNE R7, #2, BH MOV DPTR, #WK MOV A, R7 MOVC A, @A+DPTR MOV P2, A MOV DPTR, #DK MOV A, R0 MOVC A, @A+DPTR ANL A, #7FH MOV P1, A LCALL DELAY RETDELAY: MOV R5, #01HDL1: MOV R4, #8EHDL0: MOV R3, #02H DJNZ R3, $ DJNZ R4, DL0 DJNZ R5, DL1 RETWK: DB 10H DB 20H單片機AD模數(shù)轉(zhuǎn)換實驗報告全文共5頁，當前為第3頁。 DB 40H單片機AD模數(shù)轉(zhuǎn)換實驗報告全文共5頁，當前為第3頁。DK: DB 0C0H,0F9H,0A4H,0B0H,99H,92H,82H,0F8H,80H,90H END實驗結(jié)果。圖2、仿真結(jié)果實驗總結(jié)。由圖4可知,設計要求2的內(nèi)容已經(jīng)成功完成;由圖5可以瞧出要求3的內(nèi)容已經(jīng)成功完成。通過這次實驗,掌握了通過8255來擴展單片機的I/O口線,對8255已經(jīng)有了充分的認識,以實踐操作來驗證理論知識,學到了很多東西。思考題。采用中斷的方法編寫A/D轉(zhuǎn)換程序,完成實驗要求 ORG 0000HSTART: LJMP MAIN ORG 0013H LJMP INTT1 ORG 0100HMAIN: MOV SP, #2FH SETB EA SETB EX1 MOV DPTR, #0FF78H MOVX @DPTR, AHERE: LJMP HEREDISPLAY: MOV R7, #0 SJMP LOOP1BH: MOV A, R1 MOV R2, ALOOP1: MOV DPTR, #WK MOV A, R7 MOVC A, @A+DPTR MOV P2, A MOV DPTR, #DK單片機AD模數(shù)轉(zhuǎn)換實驗報告全文共5頁，當前為第4頁。 MOV A, R2單片機AD模數(shù)轉(zhuǎn)換實驗報告全文共5頁，當前為第4頁。 MOVC A, @A+DPTRMOV P1, A LCALL DELAY INC R7 CJNE R7, #2, BH MOV DPTR, #WK MOV A, R7 MOVC A, @A+DPTR MOV P2, A MOV DPTR, #DK MOV A, R0 MOVC A, @A+DPTR ANL A, #7FH MOV P1, A LCALL DELAY RETDELAY: MOV R5, #01HDL1: MOV R4, #8EHDL0: MOV R3, #02H DJNZ R3, $ DJNZ R4, DL0 DJNZ R5, DL1 RETINTT1: MOVX A, @DPTR MOVB, #51 DIV AB MOVR0, A MOVA, B MOV B, #5 DIV AB MOVR1, A MOVR2, B LCALLDISPLA