Exercise List

Here is a list of exercises to be solved during the course on emdedded systems. First we play on the Linux system installed on the PC, then we write a few simple C programs and their associated Makefiles before exploring the Raspberry Pi and its tools.

Finally we have a look at libraries that allow us to easily interface external hardware. A bread board is used to set up small electronic circuits with sensors and actuators that allow us to acquire data like

• temperature, humidity air pressure in digital or analogue form
• read any kind of electric signal through analogue to digital conversion
• time
• motor speed and angular position
• read switch positions
• EEPROMS

or control

• LEDs
• motors
• displays etc.

To my knowledge 2 libraries giving access to the GPIO pins and the I2C and SPI busses: wiringpi and pigpio. I had a look at both libraries and find pigpio more complete. This library comes in 2 versions: Either you can directly access the hardware through pigpio calls, in which case you must be the root user, or you can (as root user) start the pigpiod daemon and the communicate with it (as normal user) through a socket interface. Since sockets can run over the network you can also run your program on your PC and use the daemon on the Raspberry Pi only to access the hardware.

Here is the list of exercises:

• LinuxSystem
• ProgrammingExercise
• CompilationTools
• Files, Pipes, Sockets
• RaspberryPi
• LedDisplay
• Switches
• Stepping Motor
• DigitalTemperature
• TemperatureHumidity
• LightMeasurement
• TemperatureAndAirPressure
• The LCD Display
• Digital to Analogue Conversion
• Analogue to Digital Conversion
• RealTimeClock
• I2C EEProm
• Heart Beat Sensor

... and we have a few tests to find out how well the professor is teaching the material:

• test 1
• solutions to test 1
• test 2
• solutions to test 2
• quiz including solution

Disclaimer:
To some of the exercises: (LedDisplay, LCD Display) solutions in Python are also given. Programming in Python was not part of the course but could be one direction for further development ! Please take these programs with a good grain of salt and look at them very critically. I am by no means an experienced Python programmer (wrote my first Python programs only after the end of the course as en exercise for myself) and the programs have been hacked up in a very short time and are not thoroughly tested. They might somehow work though.

Examination sessions:

The examination session for the physics class in foreseen for Monday 27. Nov. at 16:00

Here are the exercises for the physics class: ExamPhys

The examination session of the computer science class is foreseen for Monday 4. Dec. 13:00

The exercises for the computer science class are described at I2C EEProm

-- Uli Raich - 2017-01-03

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