EMPR - Embedded Systems Project

University of York, Computer Science BEng/MEng Stage 2 EMPR (Embedded Systems Project) Part 1

Team Members: Jacob Allen & Kia Alderson

Contents

• 1. Mini Projects
  • 1.1. Mini Project 1
  • 1.2. Mini Project 2
  • 1.3. Mini Project 3
• 2. Main Project
• 3. Libraries

1. Mini Projects

1.1. Mini Project 1

LED and Serial communication project. Must fulfil the following:

• Print: "Starting count" on the terminal screen.
• Display the 4-bit (0-15) number on the LEDs with each number displayed for about 1 second under the control of timer-based interrupts.
• Simultaneously display the 0-15 count on the terminal screen in decimal, hexadecimal and binary.
• Print: "Finished count" on the terminal screen.

1.2. Mini Project 2

I2C, LCD and Keypad project. Must fulfil the following:

• Print: the number I2C devices connected, followed by a pause of 1 second.
• Display "Hello World" then "Hello [newline] world" on the LCD with a pause of 1 second and a clear LCD screen after each of the two print operations.
• Display characters on the LCD as they are typed on the keypad.
• Optional extra: Mini calculator.

1.3. Mini Project 3

ADC, DAC and PWM project. Must fulfil the following:

• Read and print out an analogue voltage via the ADC (Max v3.3).
• Generate a sine wave using the DAC, the amplitude and frequency should be varied over time (every 10 seconds).
• Mirror an input sine wave using the ADC to read and the DAC to write.
• Output a waveform on the PWM, using single edge mode and cycling through the full range of changes in pulse width 5 times. A single cycle from minimum pulse width to maximum should take 5 seconds and should be displayed on the oscilloscope. It should use some form of timer on the MCU to change the pulse width at regular intervals, not a delay loop.
• Optionally: Build a distance measuring device, using a Sharp GP2Y0A21YK0F infra-red range sensor. Printing the sensors output voltage and/or measured distance to the LCD screen.

2. Main Project

See EMPR2 repository.

3. Libraries

A set of libraries created from the code of the Mini Projects to simplify the development of the Main Project.

• Constants - Generic useful constants
• Common - Common requirements
• Utilities - Generic useful tools
• Serial - Tools for interfacing with a computer via UART
• Keypad - Tools for working with the keypad on the expansion board via I2C
• LCD - Tools for writing to the LCD on the expansion board via I2C
• I2C - Tools for interfacing with I2C
• DAC - Tools for controlling the DAC on chip
• ADC - Tools for controlling the ADC on chip