MSP430 Microcontroller Basics

685 Pages·2008·4.06 MB·English

by  John H. Davies

MSP430 Microcontroller Basics
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MSP430 Microcontroller Basics
John H. Davies
AMSTERDAM•BOSTON•HEIDELBERG•LONDON
NEWYORK•OXFORD•PARIS•SANDIEGO
SANFRANCISCO•SINGAPORE•SYDNEY•TOKYO
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Contents
Preface........................................................................... xi
Chapter1:EmbeddedElectronicSystemsandMicrocontrollers ................... 1
1.1 What(andWhere)AreEmbeddedSystems? .................................... 1
1.2 ApproachestoEmbeddedSystems............................................... 2
1.3 SmallMicrocontrollers ........................................................... 5
1.4 AnatomyofaTypicalSmallMicrocontroller.................................... 8
1.5 Memory........................................................................... 11
1.6 Software..........................................................................15
1.7 WhereDoestheMSP430Fit?...................................................16
Chapter2:TheTexasInstrumentsMSP430 .....................................21
2.1 TheOutsideView—Pin-Out ....................................................21
2.2 TheInsideView—FunctionalBlockDiagram..................................24
2.3 Memory...........................................................................25
2.4 CentralProcessingUnit..........................................................30
2.5 Memory-MappedInputandOutput.............................................32
2.6 ClockGenerator..................................................................33
2.7 Exceptions:InterruptsandResets...............................................36
2.8 WheretoFindFurtherInformation .............................................37
Chapter3:Development.........................................................43
3.1 DevelopmentEnvironment......................................................44
3.2 TheCProgrammingLanguage..................................................46
3.3 AssemblyLanguage..............................................................55
3.4 AccesstotheMicrocontrollerforProgrammingandDebugging..............57
3.5 DemonstrationBoards...........................................................59
3.6 Hardware .........................................................................64
3.7 Equipment........................................................................65
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viii Contents
Chapter4:ASimpleTouroftheMSP430.......................................67
4.1 FirstProgramonaConventionalDesktopComputer..........................68
4.2 LightLEDsinC .................................................................70
4.3 LightLEDsinAssemblyLanguage.............................................72
4.4 ReadInputfromaSwitch .......................................................80
4.5 AutomaticControl:FlashingLightbySoftwareDelay ........................91
4.6 AutomaticControl:UseofSubroutines.........................................99
4.7 AutomaticControl:FlashingLightbyPollingTimer_A......................105
4.8 HeaderFilesandIssuesBrushedundertheCarpet............................114
Chapter5:ArchitectureoftheMSP430Processor .............................119
5.1 CentralProcessingUnit.........................................................119
5.2 AddressingModes ..............................................................125
5.3 ConstantGeneratorandEmulatedInstructions................................131
5.4 InstructionSet...................................................................132
5.5 Examples ........................................................................146
5.6 ReflectionsontheCPUandInstructionSet ...................................153
5.7 Resets............................................................................157
5.8 ClockSystem....................................................................163
Chapter6:Functions,Interrupts,andLow-PowerModes .......................177
6.1 FunctionsandSubroutines .....................................................178
6.2 WhatHappenswhenaSubroutineIsCalled? .................................178
6.3 StorageforLocalVariables.....................................................179
6.4 PassingParameterstoaSubroutineandReturningaResult..................183
6.5 MixingCandAssemblyLanguage ............................................185
6.6 Interrupts ........................................................................186
6.7 WhatHappenswhenanInterruptIsRequested? ..............................188
6.8 InterruptServiceRoutines......................................................190
6.9 IssuesAssociatedwithInterrupts...............................................196
6.10 Low-PowerModesofOperation...............................................198
Chapter7:DigitalInput,Output,andDisplays.................................207
7.1 DigitalInputandOutput:ParallelPorts .......................................208
7.2 DigitalInputs....................................................................216
7.3 SwitchDebounce ...............................................................225
7.4 DigitalOutputs..................................................................238
7.5 Interfacebetween3Vand5VSystems.........................................243
7.6 DrivingHeavierLoads..........................................................247
7.7 LiquidCrystalDisplays.........................................................252
7.8 DrivinganLCDfromanMSP430x4xx........................................256
7.9 SimpleApplicationsoftheLCD ...............................................264
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Contents ix
Chapter8:Timers..............................................................275
8.1 WatchdogTimer.................................................................276
8.2 BasicTimer1 ....................................................................281
8.3 Timer_A.........................................................................287
8.4 MeasurementintheCaptureMode ............................................300
8.5 OutputintheContinuousMode................................................318
8.6 OutputintheUpMode:Edge-AlignedPulse-WidthModulation ............330
8.7 OutputintheUp/DownMode:CenteredPulse-WidthModulation ..........349
8.8 OperationofTimer_AintheSamplingMode.................................352
8.9 Timer_B .........................................................................353
8.10 WhatTimerWhere?.............................................................356
8.11 SettingtheReal-TimeClock:StateMachines.................................357
Chapter9:Mixed-SignalSystems:AnalogInputandOutput....................369
9.1 Comparator_A...................................................................371
9.2 Analog-to-DigitalConversion:GeneralIssues ................................393
9.3 Analog-to-DigitalConversion:SuccessiveApproximation...................402
9.4 TheADC10Successive-ApproximationADC.................................407
9.5 BasicOperationoftheADC10.................................................412
9.6 MoreAdvancedOperationoftheADC10 .....................................424
9.7 TheADC12Successive-ApproximationADC.................................432
9.8 Analog-to-DigitalConversion:Sigma–Delta..................................438
9.9 TheSD16_ASigma–DeltaADC...............................................446
9.10 OperationofSD16_A...........................................................459
9.11 SignalConditioningandOperationalAmplifiers..............................475
9.12 Digital-to-AnalogConversion..................................................485
Chapter10:Communication....................................................493
10.1 CommunicationPeripheralsintheMSP430...................................495
10.2 SerialPeripheralInterface......................................................497
10.3 SPIwiththeUSI ................................................................504
10.4 SPIwiththeUSCI ..............................................................513
10.5 AThermometerUsingSPIinMode3withtheF2013asMaster.............520
10.6 AThermometerUsingSPIinMode0withtheFG4618asMaster...........526
10.7 Inter-integratedCircuitBus ....................................................534
10.8 ASimpleI²CMasterwiththeUSCI_B0onaFG4618........................542
10.9 ASimpleI²CSlavewiththeUSIonaF2013..................................549
10.10 StateMachinesforI²CCommunication .......................................559
10.11 AThermometerUsingI²CwiththeF2013asMaster .........................567
10.12 AsynchronousSerialCommunication .........................................574
10.13 AsynchronousCommunicationwiththeUSCI_A.............................581
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