单片机原理及应用（双语版·新形态版） 课件 第9章MCS51与机械及光学器件的接口设计

IntroductoryMicrocontrollerTheoryandApplicationsChapter9InterfacingtheMCS-51toMechanicalandOpticalDevicesInterfacingtoExternalDevices8051A-DconverterExternalMemory7-segmentdisplayKeypadLCDdisplayD-AconverterSteppermotoriButtonKeypads按键andKeyboards键盘Interfaceto3x4KeypadINT0P1.2P1.0P1.1P0.0P0.3+5VPull-upresistorsRow0Row1Row2Row301Col2Interfaceto3x4KeypadINT0P1.2P1.0P1.1P0.0P0.3+5VPull-upresistors11110000111I/PO/P01Col2Row0Row1Row2Row3Interfaceto3x4KeypadINT0P1.2P1.0P1.1P0.0P0.3+5VPull-upresistors11110000111I/PO/P01Col200InterruptRow0Row1Row2Row3Switchclosed0Interfaceto3x4KeypadINT0P1.2P1.0P1.1P0.0P0.3+5VPull-upresistors000011I/PO/P01Col20Column=1Row0Row1Row2Row3Whichcolumn?Interfaceto3x4KeypadINT0P1.2P1.0P1.1P0.0P0.3+5VPull-upresistors011111I/PO/P01Col21NotRow0Row0Row1Row2Row3Whichrow?Interfaceto3x4KeypadINT0P1.2P1.0P1.1P0.0P0.3+5VPull-upresistors101111I/PO/P01Col21NotRow1Row0Row1Row2Row3Whichrow?Interfaceto3x4KeypadINT0P1.2P1.0P1.1P0.0P0.3+5VPull-upresistors110111I/PO/P01Col20Row2Row0Row1Row2Row3Whichrow?Interfaceto3x4KeypadINT0P1.2P1.0P1.1P0.0P0.3+5VPull-upresistors111011I/PO/P01Col21NotRow3Row0Row1Row2Row3Interfaceto3x4KeypadINT0P1.2P1.0P1.1P0.0P0.3+5VPull-upresistors01Col2Row0Row1Row2Row3 POLLINGTOFINDSWITCHMakeP0outputandP1inputMakeP0=00hWaitforinterruptISRreadsP1.FindwhichcolumnMakeRow0low.IfP1not111bthenRow0MakeRow1low.IfP1not111bthenRow17.MakeRow2low.IfP1not111bthenRow28.MakeRow3low.IfP1not111bthenRow39.2.4Debouncing防抖动ofKeypads080511P1.09.2.4Debouncing防抖动ofKeypads080511P1.09.2.4Debouncing防抖动ofKeypads0805111010P1.0ISR_KEY: MOV R0,#20hLOOP1: MOV R1,#FFh DJNZ R1,$ DJNZ R0,LOOP1 ;RemainderofISR9.2.4Debouncing防抖动ofKeypadsPleasetry…. Question9.6.2 Question9.6.3 (4)Question9.6.2ACBMGHINROPDJKLEFVUTSXQW10portpins9.6.37-SegmentDisplays七段码显示Connectionof7-segmentdisplaysto8051s7-SegmentDisplaycabdefgP-typeGaAssemiconductorN-typesemiconductorN-型半导体LightEmittingDiode(LED)LightGalliumArsenide砷化镓GND+CommonAnodeConnection共阳极Anodes阳极+abcdefgGND+CommonCathodeConnection共阴极Cathodes阴极GNDabcdefgPortCurrentCapability8051P1.48051P1.4LEDLEDGND+5V60mA2mASETBP1.4CLRP1.4107-SegmentDisplays七段码显示7-Segmenttodisplay1780P1.0P1.3P0.0P0.7ConnectiontoanodesP1.0P1.3P0.0P0.7Connectiontoanodes100010011117-Segmenttodisplay1780P1.0P1.3P0.0P0.7Connectiontoanodes010000011117-Segmenttodisplay1780P1.0P1.3P0.0P0.7Connectiontoanodes001000000007-Segmenttodisplay1780P1.0P1.3P0.0P0.7Connectiontoanodes000100000017-Segmenttodisplay1780P1.0P1.3P0.0P0.7ConnectiontoanodesDisplay3Display2Display1Display07-Segmenttodisplay1780

ZERO EQU 10000001b ONE EQU 11001111b TWO EQU10010010b THREE EQU10000110b FOUR EQU11001100b FIVE EQU10100100b SIX EQU10100000b SEVEN EQU10001111b EIGHT EQU10000000b NINE EQU10001100bREPEAT: CLR P1 SETB P1.0 ;SelectDisplay0 MOV P0,#ONE ACALL DELAY7-Segmenttodisplay1780

CLR P1.0 SETB P1.1 ;SelectDisplay1 MOV P0,#SEVEN ACALL DELAY CLR P1.1 SETB P1.2 ;SelectDisplay2 MOV P0,#EIGHT ACALL DELAY CLR P1.2 SETB P1.3 ;SelectDisplay3 MOV P0,#ZERO ACALL DELAY SJMP REPEAT7-Segmenttodisplay1780UseofaDecoderchip译码器芯片B7447decoderCADabcgdfe7-SegmentDisplayDecoderP1.0P1.2P0.0P0.37447decoderPleasetry….Question9.6.10 (Page204)Question9.6.10P1.0P1.2P0.0P0.37447decoderInput=0110Output=?abcdefgOutput=01000007447decoderControlling7-segmentsfromtheSerialPort1.Usethe8051serialport2.UseSerialMode03.ConnectaShiftRegister移位寄存器 toeach7-segmentdisplayUses7pinsonthe80516.2.5UsingMode0onthe8051serialportModeSM0SM1DescriptionBaudrate000ShiftregisterOsc/121018-bitUARTVariable2109-bitUARTOsc/64Osc/323119-bitUARTVariable80516.2.5UsingMode0onthe8051serialport01110011TXDfosc/121machinecycleRXDSBUF80516.2.5UsingMode0onthe8051serialport01110011RXDTXDSBUFfosc/1280516.2.5UsingMode0onthe8051serialport01110011RXDTXDSBUFfosc/1280516.2.5UsingMode0onthe8051serialport01110011RXDTXDSBUFfosc/1280516.2.5UsingMode0onthe8051serialport01110011RXDTXDSBUFfosc/1280516.2.5UsingMode0onthe8051serialport01110011RXDTXDSBUFfosc/1280516.2.5UsingMode0onthe8051serialport01110011RXDTXDSBUFfosc/1280516.2.5UsingMode0onthe8051serialport01110011RXDTXDSBUFfosc/1280516.2.5UsingMode0onthe8051serialport01110011RXDTXDSBUFfosc/121TIShiftRegister移位寄存器for7-segment74LS164ShiftRegister(MasterReset)8051ShiftRegister移位寄存器for7-segmentQ0ABCKRXDTXDSBUFACC+5V60hLSBMSBLSBMSBSerialMode0ag74LS1648051ShiftRegister移位寄存器for7-segmentQ0ABCKRXDTXDSBUF1000001ACC+5V060hag8051ShiftRegister移位寄存器for7-segmentQ0ABCKRXDTXDSBUF0100001ACC+5V060hag8051ShiftRegister移位寄存器for7-segmentQ0ABCKRXDTXDSBUF011000ACC+5V0060hag8051ShiftRegister移位寄存器for7-segmentQ0ABCKRXDTXDSBUF00110ACC+5V00060hag8051ShiftRegister移位寄存器for7-segmentQ0ABCKRXDTXDSBUF0011ACC+5V000060hag8051ShiftRegister移位寄存器for7-segmentQ0ABCKRXDTXDSBUF001ACC+5V0000160hag8051ShiftRegister移位寄存器for7-segmentQ0ABCKRXDTXDSBUF00ACC+5V00001160hag8051ShiftRegister移位寄存器for7-segmentQ0ABCKRXDTXDSBUF0ACC0+5V00001160hag8051ShiftRegister移位寄存器for7-segmentQ0ABCKRXDTXDSBUFACC0+5V000011060hagShiftRegister移位寄存器for7-segment8051RXDTXD74164ABQ1Q7CKCK74164+5VHowmanymachinecycles?32Todisplay1234(Page194)8051RXDTXD74164ABQ1Q7CKCK74164+5Vag

ZERO EQU10000001b ONE EQU11001111b

TWO EQU10010010b THREE EQU10000110b FOUR EQU11001100b FIVE EQU10100100b SIX EQU10100000b SEVEN EQU10001111b EIGHT EQU10000000b NINE EQU10001100bMAIN: CLR SM1 CLR SM0 ;Serialmode0 CLR TITodisplay1234(Page194)REPEAT: MOV SBUF,#FOUR JNB TI,$ ;8machinecycles CLR TI MOV SBUF,#THREE JNB T1,$ CLR TI MOV SBUF,#TWO JNB TI,$

CLR TI MOV SBUF,#ONE JNB TI,$ CLR TI ACALL DELAY

SJMP REPEAT32+32ms500msPleasetry….Question9.6.11 (Page204)REPEAT: MOV SBUF,#FOUR JNB TI,$ CLR TI MOV SBUF,#THREE JNB T1,$ CLR TI MOV SBUF,#TWO JNB TI,$

CLR TI MOV SBUF,#ONE JNB TI,$ CLR TI ACALL DELAY

SJMP REPEATQuestion9.6.11(Page204)Modifythisprogramsothatdisplayshows0000 MOV R7,#04h;UseR7tocountLOOP: MOV SBUF,#ZERO JNB TI,$ ;Waitforshift CLR TI DJNZ R7,LOOP;NextdigitQuestion9.6.11(Page204)Modifytheprogramtodisplay0000LiquidCrystalDisplays(LCDs)Alphanumeric字母数字=A…Z,1…0,#,$,%...WhatisLight?Anelectromagneticwave电磁波=ElectricWave+MagneticWaveElectricWave(Vertical)

distance

ElectricfieldE

MagneticWave(Horizontal)

distance

MagneticfieldHElectric

Field

Magnetic

Field

ElectricField

Magnetic

Field

+-+-EHS

ElectromagneticWave电磁波

Polarisationdirection极化方向S=ExH矢量叉乘EHPolariser极化Polarisationdirection极化方向AlllightreflectedisbackConductors

导体EHPolariser极化Polarisationdirection极化方向AlllightistransmittedLiquidCrystalDisplays(LCDs)液晶显示器Polarisationoflight极化方向LiquidcrystalelectricalpropertiesLiquidcrystaltwistLighttransmissionWhatisaLiquidCrystal液晶?晶体液晶液体FixedFreeFlexibleCrystalLiquidLiquidcrystalMolecule分子Nematic向列态liquidcrystalsVNematicliquidcrystaltwistTwistangleVoltage旋转LiquidCrystalDisplays(LCDs)液晶显示器Polarisationoflight极化方向LiquidcrystalelectricalpropertiesLiquidcrystaltwist旋转LighttransmissionMolecule分子Groovedglass

有槽的玻璃LiquidCrystalDisplays(LCDs)液晶显示器Polarisationoflight极化方向LiquidcrystalelectricalpropertiesLiquidcrystaltwistLighttransmission光传播LCDconstructionGroovedglassandconductorPolariserat0oLightPolariserat90oLightLiquidcrystalLCDconstructionLightLightLightNolightLighttransmission光传播VoltageLight%LCDconstructionMirror镜子Liquidcrystal液晶Polariser极化Polariser极化Transparentconductor透明导体Electricalconnections电气连接LightLCDDisplayModuleHitachiHD44780UController控制器RSRWEDataLCDControllinesHD44780UcontrollerLCDDisplay显示RSRWEDataI/OpinsDB0-DB7LCDRSRWEDataI/OpinsDB0-DB7LCDRegisterSelect0=Instructions1=DataRead/WriteEnablepulseValueInstruction38hFunction:8-bitinterface,2lines,5*7pixels30hFunction:8-bitinterface,1line,5*7pixels28hFunction:4-bitinterface,2lines,5*7pixels20hFunction:4-bitinterface,1lines,5*7pixelsInstructionSet指令集forHD44780ULiquidCrystalDisplays(LCDs)Cursor光标Pixel象素5x7pixelsValueInstruction1EhScrollright18hScrollleft02hHome10hCursorleft14hCursorright0EhUnderlineValueInstruction0FhBlinkcursor0ChHidecursor08hBlank0ChRestore01hClearscreen80h+addrSetcursorInstructionSetforHD44780U8051mC=Microcontroller单片机DB0DB7RSRWEP1.0P1.2P0.0P0.701RSInstructionDataRWWriteReadELowHighLCD8051mC=Microcontroller单片机DB0DB7RSRWEP1.0P1.2P0.0P0.701RSInstructionDataRWWriteReadELowHighSETB RS;RS=1

CLR RW;RW=0MOV P0,#58h;“X”CLR E ;EnableSETB ECLR E Slow8051mC=Microcontroller单片机DB0DB7RSRWEP1.0P1.2P0.0P0.701RSInstructionDataRWWriteReadELowHighXSETB RS;RS=1

CLR RW;RW=0MOV P0,#58h;“X”CLR E ;EnableSETB ECLR E Handshaking握手信号Doyouwantsomebananas?PleasesendHandshaking握手信号Doyouwantsomemore?Don’tsendHandshaking握手信号Pleasesend8051mC=Microcontroller单片机DB0DB7RSRWEP1.0P1.2P0.0P0.7BusyflagX001Character“X”8051mC=Microcontroller单片机DB0DB7RSRWEP1.0P1.2P0.0P0.7BusyflagX001 MOV P0,#0FFh ;SetPort1forinput SETB RW ;SelectreadoperationEPULSE: SETB E ;Starttheenablepulse MOV ACC,P0 ;ReadtheBusyFlag CLR E ;Endenablepulse JB ACC.7,EPULSE;Loopwhilebusy8051mC=Microcontroller单片机DB0DB7RSRWEP1.0P1.2P0.0P0.7BusyflagX MOV P0,#0FFh ;SetPort1forinput SETB RW ;SelectreadoperationEPULSE: SETB E ;Starttheenablepulse MOV ACC,P0 ;ReadtheBusyFlag CLR E ;Endenablepulse JB ACC.7,EPULSE;LoopwhilebusyWAIT_BUSY: MOV P0,#0FFh ;SetPort1forinput SETB RW ;SelectreadoperationEPULSE: SETB E ;Starttheenablepulse MOV ACC,P0 ;ReadtheBusyFlag CLR E ;Endenablepulse JB ACC.7,EPULSE;Loopwhilebusy

RETWRITE_CHAR:;Write“X”tocurrentcursorposition SETB RS ;RS=1

Selectdata CLR RW ;RW=0

Selectwrite MOV P0,#58h ;Send“X”toLCD CLR E ;SendEnablepulse SETB E CLR E ACALL WAIT_BUSYSubroutineENABLE_PULSE:WRITE_CHAR:;Write“X”tocurrentcursorposition SETB RS ;RS=1

Selectdata CLR RW ;RW=0

Selectwrite MOV P0,#58h ;Send“X”toLCD ACALL ENABLE_PULSE ;SendEnable ACALL WAIT_BUSYWRITE_CHAR:;Write“X”tocurrentcursorposition

SETB RS ;RS=1

Selectdata CLR RW ;RW=0

Selectwrite MOV P0,#58h ;Send“X”toLCD ACALL ENABLE_PULSE ;SendEnable ACALL WAIT_BUSYCOMMAND:;Sendinstruction14htoLCD

CLR RS;RS=0Selectinstructions

CLR RW;RW=0Selectwrite

MOV P0,#14h ACALL ENABLE_PULSE ;SendEnable ACALL WAIT_BUSY Pleasetry….Question9.6.16 (Page205)UseTable9.3onPage198WRITE_CHAR:;Write“X”tocurrentcursorposition

SETB RS ;RS=1

Selectdata CLR RW ;RW=0

Selectwrite MOV P0,#58h ;Send“X”toLCD ACALL ENABLE_PULSE ;SendEnable ACALL WAIT_BUSYCOMMAND:;Sendinstruction14htoLCD

CLR RS;RS=0Selectinstructions

CLR RW ;RW=0Selectwrite

MOV P0,#14h ACALL ENABLE_PULSE ;SendEnable ACALL WAIT_BUSY 01RSInstrDataRWWriteRead CLR RS ;Selectinstructions

CLR RW ;Selectwriteoperation MOV P0,#38h ;8-bit,2lines,5*7pixels ACALL ENABLE_PULSE

ACALL WAIT_BUSY CLR RS ;Selectinstructions

CLR RW ;Selectwriteoperation MOV P0,#02h ;Cursortotop-left ACALL ENABLE_PULSE

ACALL WAIT_BUSY CLR RS ;Selectinstructions

CLR RW ;Selectwriteoperation MOV P0,#0Ch ACALL ENABLE_PULSE

ACALL WAIT_BUSY MOV DPTR,#DATA_ADDRESS MOV R7,#08hLOOP: SETB RS ;Selectdata

CLR RW ;Selectwrite

CLR A MOVC A,@A+DPTR MOV P0,A ;SendchartoLCD ACALL ENABLE_PULSE

ACALL WAIT_BUSY INC DPTR DJNZ R7,LOOP SJMP $DATA_ADDRESS: DB “SHANDONG” StepperMotors步进电机DCMotor直流电

StepperMotor步进电机ContinuousrotationTwowiresHighspeedSteppedrotationPrecisepositionLowspeedSNNMagnetCoilsStepperMotor12341234SNNStepperMotor12341234SNNNStepperMotor12341234SNNStepperMotor12341234SNNNStepperMotor12341234SNNStepperMotor12341234SNNStepangle=45oSN12341234Howcanwereducethestepangle?ToothedRotor有牙的转头O4coils25teethWhatisthestepangle?4coils25teeth4coils25teethTwocoilsenergisedwillproducea“half-step”Angle=1.8o8051P0.0P0.1P0.2P0.3GND60mAmaximum8051P0.0P0.1P0.2P0.3GNDInterface8051interfacetoStepperMotorCoilDarlingtontransistor达灵顿晶体管8051interfacetoStepperMotor8051interfacetoStepperMotor8051interfacetoStepperMotor8051interfacetoStepperMotorProtectiondiodes保护二极管+5VGNDviHighpositivevoltage-+-+8051interfacetoStepperMotorHighpositivevol