F19: Tower Defense in Space

Logo

Project Title

Tower Defense ... In Space

ABSTRACT

My abstract goes here.

INTRODUCTION AND OBJECTIVES

TEAM MEMBERS & RESPONSIBILITIES
Team Members	Administrative Roles	Technical Roles
[Ryan Zelek]	Team Lead	Game Design Lead
[Zach Smith]	Git Repo Manager	Hardware Design Lead
[Chong Hang Cheong]	Wiki Report Manager	LED Matrix API
[Polin Chen]	Bill of Materials Manager

SCHEDULE

TEAM MEETING DATES & DELIVERABLES
Week#	Date Assigned	Deliverables	Status
1	10/15/19	Share team contact information Create Git Repository Set up group Slack channel Invite Preet to Slack Establish Code Guidelines and Standards	Complete Complete Complete Complete Complete
2	10/22/19	Identify major hardware components (BOM) Begin purchasing major items Finalize game architecture Have Git Repo Setup	Complete Complete Complete Complete
3	10/29/19	Solidify individual roles and responsibilities Establish baseline software architecture design and guidelines going forward	Complete Complete
4	11/5/19	Kelvin Verify functionality of LED matrix and gather resources for further understanding	Complete
5	11/12/19	Kelvin Find out feasibility of creating an LED matrix driver in C Polin Have APIs ready for joystick and buttons Ryan Have basic user interface for the game displayed through serial port Zach First controller PCB design complete Specify any remaining hardware components and coordinate purchase	Complete Complete Complete Complete Complete
6	11/19/19	Kelvin Complete baseline API for LED matrix Polin Determine feasibility of MP3 decoding and integration into system Ryan Complete first pass at basic tower defense level with straight pathway Zach Controller PCB sent out for fabrication Design break-out PCB for LED matrix + IO expander />	Complete Incomplete Complete Complete Complete
7	11/26/19	Kelvin LED matrix driver should be reviewed and complete Polin Work with Zach to identify remaining hardware components and, if applicable, MP3 decoder requirements Ryan Work with Kelvin to integrate his API into the game Game should be running with LED matrix display involvement Advanced game logic design/implementation is near feature complete Zach PCB assembled and tested. Problems identified and solutions proposed	Incomplete ~~Incomplete~~ Complete Complete Complete Complete
8	12/3/19	Complete game testing and validation Critical bugs (software AND hardware) identified and a clear path towards closure has been identified	Incomplete Complete
9	12/10/19	Continuation of previous week activities (bug fixes, etc) Implement any potential optimizations and/or expansions	Incomplete Incomplete

BILL OF MATERIALS

Top Level
PART NAME	PART MODEL & SOURCE	QUANTITY	COST PER UNIT (USD)
~~32x64 RGB LED Matrix~~	~~[1]~~	2	~~$49.95~~
~~64x64 RGB LED Matrix~~	~~Sparkfun~~	1	~~$79.95~~
~~NovaeLED 64x64 RGB LED Matrix (2-Pack)~~	~~Amazon~~	1	~~$80.99~~
64x64 RGB LED Matrix*	Adafruit	1	$104.07
5V 4A PSU	-	1	FREE

Breakout Board PCB**
Item #	PART NAME	PART SOURCE	QUANTITY	COST PER UNIT (USD)
1	IC REG LINEAR LD1117S33CTR	DIGIKEY	5	$0.351
2	MHS16N-ND 16POS CONN 2.54MM	DIGIKEY	2	$2.60
3	CAP CER 0.1UF 25V X7R 1206	DIGIKEY	5	$0.221
4	CAP CER 10UF 16V X5R 1206	DIGIKEY	5	$0.202
5	RES SMD 470 OHM 1% 1/4W 1206	DIGIKEY	10	$0.0267
6	PTC RESET FUSE 24V 500MA 1206	DIGIKEY	10	$0.1588
7	CONN SOCKET 40POS 0.1 TIN PCB	DIGIKEY	2	$5.03
8	Manufacturing x 5 boards *	JLCPCB	1	$29.81

Gamepad PCB**
Item #	PART NAME	PART SOURCE	QUANTITY	COST PER UNIT (USD)
1	Analog 2-axis Thumb Joystick w/ select button	Amazon	1	$7.67
2	SAM8205-ND 10POS 1.27MM	DIGIKEY	5	$3.38
3	LED GREEN 1206 SMD	DIGIKEY	5	$0.24
4	LED RED 1206 SMD	DIGIKEY	5	$0.257
5	RES 1K OHM 1% 1/2W 1206 SMD	DIGIKEY	5	0.0358
6	CAP CER 0.1UF 50V X7R 1206	DIGIKEY	5	$0.088
7	12x12x7.3mm Tactile Push Button w/ cap (pack of 25)	Amazon	1	$7.89
8	Manufacturing x 5 boards *	JLCPCB	1	$14.21

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

HARDWARE INTEGRATION

Hardware Design 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