book

Experimenting with Raspberry Pi

by Warren W. Gay

November 2014

Beginner

248 pages

4h 40m

English

Apress

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CharacteristicsCircuitProtocolOverall ProtocolData BitsData FormatSoftwareChosen ApproachExample RunSource Code
DC CharacteristicsGPIO Output CurrentGPIO InputsStandby CurrentInput Logic LevelsOutput Logic LevelsReset TimingCircuitI2C BusWiring and TestingSoftware ConfigurationGeneral ConfigurationMain ProgramModule i2c_funcs.cModule sysgpio.cExample RunResponse Times
Project OverviewNunchuk FeaturesConnector PinoutTesting the ConnectionNunchuk I2C ProtocolEncryptionRead Sensor DataLinux uinput InterfaceWorking with Header FilesOpening the Device NodeConfiguring EventsCreating the NodePosting EV_KEY EventsPosting EV_REL EventsPosting EV_SYN EventsClosing uinputX-WindowInput UtilitiesTesting the NunchukTesting ./nunchukUtility lsinputsUtility input-eventsThe Program
DS1307 OverviewPins X1 and X2Pin SQW/OUTPower3-Volt CompatibilityLogic LevelsTiny RTC ModificationsChecking for Pull-up ResistorsDS1307 Bus SpeedRTC and RAM Address MapReading Date and TimeI2C CommunicationWiringRunning the ExamplesThe Ultimate TestThe Startup Script
Operating ParametersPinoutVS1838B CircuitThe IR ReceiverSoftwareSignal ComponentsCode OrganizationCommand-Line Options
Floppy-Disk Stepper MotorYour Junk-Box Motor?Driver CircuitDarlington PairDriving the DriverInput LevelsPower-on Reset/BootModes of OperationWave Drive (Mode 0)Full-Step Drive (Mode 1)Half-Step Drive (Mode 2)SoftwareTesting
The L298 DriverSensing ResistorEnable A and BInputs In1 and In2Protection DiodesL298 PCBDriving from GPIOThe DMM CheckBipolar Stepper ModesOne-Phase-On ModeTwo-Phase-On ModeHalf-Step ModeChoosing Driving GPIOsProject SchematicJunk-Box MotorsProgram OperationProgram Internals
Switched InputsThe CD4013Testing the Flip-FlopThe LEDØMQPerforming InstallationCompiling and LinkingSensing Station DesignSensing Station ProgramConsole ProgramConsole CommandsSensor Source CodeConsole Source Code
Introduction to PWMPWM ParametersPWM Hardware PeripheralPWM SoftwareMeter Circuitpwm ProgramHardware PWM Set CommandHardware Based CPU Percent-Busy DisplaySoftware PWM ProgramHow Many PWMs?Running the Software PWM CommandSoftware Based CPU Percent-Busy Display
Ohm’s LawPowerUnits