Difference between revisions of "F19: Tower Defense in Space"

Revision as of 22:57, 18 December 2019

Logo

Grading Criteria

Tower Defense...In Space!

Tower Defense ... In Space.

Abstract

My abstract goes here.

Introduction and Objectives

intro here please.

Team Members

Schedule

Bill of Materials

* Shipping and tax included in value shown in the cost per unit column
** Only parts that were purchased are displayed.

System Design

System Block Diagram

Hardware Design - Electrical

Overview

At a high level hardware integration requirements fell into two categories:

1. Reduce risk of unreliable cable connections and eliminate possibility of damage to components through unexpected disconnections, power surges, etc.
2. Provide a more fluid physical interface for the user to interact with the game via hardware

To accomplish these goals, two boards were designed: a breakout board and a gamepad controller. The breakout board serves as a connection hub between all system hardware components; power, the RGB matrix, the SJTWO board, etc. while the joystick provides a cleaner package to present the user with the games inputs. The diagram below shows the relationship between the main subsystems:

All board designs were done using EAGLE and manufactured by JLCPCB. Both boards were only two layers and used passive components for the most part.

Breakout Board Design

The breakout board design requirement was to interface all external hardware components with the embedded system (SJTWO). The hardware connections are:

1. The 64x64 RGB Matrix
2. Output power to the RGB Matrix
3. User game controller (see next section)
4. Input power supply (5V)
5. The SJTWO embedded system

Breakout Board Schematic

Breakout Board PCB Top Layout

Breakout Board PCB Bottom Layout

Breakout Board PCB Top Layout

Breakout Board PCB Bottom Layout

Populated and mounted to the SJTWO board

Gamepad Hardware Design

The gamepad board design requirement was to provide a more packaged interface for the user to interact with the game.

Gamepad Schematic

Gamepad PCB Top

Gamepad PCB Bottom

Gamepad PCB Fully Populated (no enclosure)

Hardware Design (Mechanical)

Only a few mechanical components were needed for this project. Namely simple brackets for mounting electrical hardware to the RGB matrix and displaying the matrix itself. All CAD designs were done using Onshape, a free CAD tool that can be used entirely through your web browser.

For displaying the RGB matrix, two brackets were 3D printed to prop it up. Their STL files can be found under our source repository.

Mounting bracket design used to prop up the RGB matrix

Hardware Integration

RGB LED MATRIX

The LED matrix that we have is 64 pixels by 64 pixels and is controlled through a 12-pin header consisting of the following pins: Pin Assignments:

1. Five Mux pins (A,B,C,D,E) – Row Selection
   1. In order to select a specific row of the LED matrix, we need to control the output level of each mux pin. Since the LED matrix light up two rows of LEDs at one time, we only select 1 out of 32 rows.
2. Two sets of RGB pins (R1,G1,B1,R2,G2,B2) – Color Selection
   1. Since we are driving two rows of LED matrix at once, we need 2 sets of RGB pins. One set is used to control the color pixels of the upper half of the display and the other set for the bottom half of the display.
3. Output Enable Pin (OE)
   1. Output Enable (OE) pin is used to turn on or off the LEDs.
4. Latch Pin (LAT)
   1. Latch pin is used to prevent the data being shifted into the shift registers and tells the shift register when it is time to switch to newly entered data
5. Clock Pin (CLK)
   1. triggers a shift on the shift registers

All these pins are required to light up a specific LED pixel on the LED matrix display.

Software Design

System Flow Charts

System Testing and Validation

Technical Challenges

The mp3 decoder1053b's document is a kind of confusing for the mode when 1032b have several modes, hence doing the survey on the GitHub is really important. For example, using the sin wave and hello binary example to test how the Initialization and HZ parameter would save a lot of time. Besides, we also have to be careful to check the SJBoard's SPI because of the SD card reader is using for reading SDcard. Hence, I would recommend using other SPI0, SPI1 instead of using SPI2.

Conclusion

Conculsion please.

Video Demonstration

Source Code

Advice for Future Students