Challenge: Vacuum Cleaner Speed Control

Description

Develop the “speed control” module such that:

• The design follows a time triggered approach
• Design is implemented using test driven development approach
• Used test design techniques are :
  • Equivalence partitioning
  • Boundary value analysis
  • State transition testing up to 1 switch coverage

Specifications

• There are 3 speeds: minimum, medium and maximum speeds
• Default speed = medium
• There are 3 switches that can control the speed: “+ ve ”, ve ” and “
• If “+ ve ” switch is pre pressed, speed increases by 1 step if speed != maximum
• If “ ve ” switch is pre pressed, speed decreases by 1 step if speed != minimum
• If “p” switch is pressed for 30 seconds, speed decreases by 1 step if speed != minimum
• Priority of switches is:
  1. “p” switch
  2. "-ve" switch
  3. "+ve" switch

Motor Angles Specifications

• The speed control sets the motor angle according to the speed
  • Minimum speed --> 140 degrees
  • Medium speed --> 90 degrees
  • Maximum speed --> 10 degrees

Tools

• Code::Blocks v20.03
• Unity C Test Harness
• Doxygen Documentation Generator

How to Simulate HW on PC?

• A text file will simulate the switches data (switch.txt)
• Another text file will store the set motor angle (motor.txt)
• Both files inside the project folder structure
• Every line correspond to a test case