Repository files navigation

Google Chrome's Dinosaur T-rex Runner Game but an Embedded Version

This project is a course project inCS/ECE353 Microprocessor Systems@University of Wisconsin-Madison. In general, we implement an embedded version of Google Chrome's T-rex Runner with some more interesting features usingFreeRTOS.

Basic Google Chrome's dinosaur T-rex runner game rules with following addional features:

• Cactus: generate randomly with hardware noise picked up inADC
• Button: instant vertical jump (up/down)
• Joystick: control dinosaur's horizontal positions (move left/right)
• Light sensor: play without button (wave hand in front of light sensor to jump)
• Accelerometer: contol dinosaur's running speed (tilt left/right)

• MSP-EXP432P401R with MKII Boosterpack from Texas Instruments.
• Peripherals:
  • LED
  • Button
  • Buzzer
  • Joystick
  • LCD Display
  • Light sensor
  • Accelerometer
• Working System Clock:48 MHz

• Programming Language:C
• IDE:Code Composer Studio
• Operating system transplant:FreeRTOS
  • Download source code fromFreeRTOS official website
  • Version:FreeRTOS 202112.00
  • include path:
    • ${PROJECT_LOC}/FreeRTOS/Source/include
    • ${PROJECT_LOC}/FreeRTOS/Source/portable/CCS/ARM_CM4F
• Peripheral Communication Protocal:SPI andi2c

• Random cactus generation: Hardware noise converted byADC14 during periodic interrupts
• LCD update: handled with message queueQueue_LCD
  1. Future frame buffers are calculated in advanced and enqueued fromTask_Game
  2. Current frame dequeued inTask_LCD to update LCD display
  3. 20ms delay is necessary inTask_Game to handle button/joystick/accelerometer data, otherwise delay would be observable.
  4. Dataflow controls by SPI synchronous communication protocol
• ACD notification:
  1. Task_XX_Timer: activate ADC to generate ADC interruption to step into interrupt handlerADC14_IRQHandler
  2. ADC14_IRQHandler: read ADC values sequence and turn on task notification forTask_XX_Bottom_Half
  3. Task_XX_Bottom_Half: waken byADC14_IRQHandler and update joystick/accelerometer status