Examination projects on Embedded Systems,

Physics class

I expect that you solve the problems on your own and you do not copy from your colleagues. For the examination itself, I will add a few questions on how you solved the problem and I will check with each of you, if the solution you present is your own. Believe me that I can easily find out if you copied, in which case I will count the problem as not solved!

C-programming:

Calculate sine values:
Write a program that calculates the sine values of angles between 0 and 360 degrees (0 and 360 included) in steps of 30 degrees. It should therefore print the values of

• sin(30), sin(60), sine(90) sin(120) ... sin(330) sin(360) where all the parameters to the sine function are given in degrees. Use a loop to accomplish this.

Write 3 C programs:

• led_on

• led_off

• led_state

How do you have to cable your LED? Produce a schematic diagram.

Command line parameters

Write a C program that switches the LED state to a level defined by the user. The program is called led and has 1 command line parameter which can be either “on” of “off”.

The LED is connected to pin 17 (GPIO 0).

When the user types:

• ./led on the LED should go on

• if he types ./led off the LED should go off.

Here is the pdf of the examination sheet:

https://iotworkshop.africa/pub/Embedded_Systems/ExamPhys/examphy.pdf

-- Uli Raich - 2017-11-23

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