SLIDE 1
+
CSEE 4840 4840 Embed mbedded ded System em Des esign ign
Lingchuan Mei: lm2908@columbia.edu Jian Lu: jl3946@columbia.edu Shuting Yang: sy2489@columbia.edu Si Wang: sw2778@columbia.edu
+Overview
n “Whac-A-Mole” like game system
+ WMT Wh Whac ac-A-Mole Li Like G Game me CSEE 4840 4840 - - PowerPoint PPT Presentation
+ WMT Wh Whac ac-A-Mole Li Like G Game me CSEE 4840 4840 - - PowerPoint PPT Presentation
+ WMT Wh Whac ac-A-Mole Li Like G Game me CSEE 4840 4840 Embed mbedded ded System em Des esign ign Lingchuan Mei: lm2908@columbia.edu Jian Lu: jl3946@columbia.edu Shuting Yang: sy2489@columbia.edu Si Wang:
SLIDE 2
SLIDE 3
+Basic Game Logic
n Nine holes, Three initial lives, Two minutes n Different items
Get: Good! Add life Deduct life Miss: Deduct life Nothing happen Nothing happen
n Different levels
SLIDE 4
+Basic Game Logic Cont.
SLIDE 5
+System Architecture
SLIDE 6
+Hardware Implementation
n Work with ADC to get the touch position x and y coordinates
and read it out in Nios II
n Figure out how to display image correctly on a 800x480
screen
n Turn the x,y coordinates into useful data for software
processing.
n Set up the interrupt for touching n Figure out how to store all the data on board, basically using
SDRAM and SRAM together. Using SRAM MUX.
SLIDE 7
+Hardware Implementation Cont.
n Map all the peripherals onto Avalon bus and get rid of the
ELF error
n Image conversion n Create the state machine for the game n Redesign a LED clock on the touch screen.
SLIDE 8
+Lessons Learned About Hardware
n ELF error is usually due to wiring mistake in the top level
connection of NIOS.
n Every time you copy an entire project, remember to recreate
the nios project. Otherwise the BSP package is mapped to the
- ld SOPC.
n Should have design the interface more easy to use. Should
split all the variables instead of putting all of them together
n Build the design using small modules.
SLIDE 9
+Display Dynamic Items
n Image -> Matrix -> Calculate the edge of the item -> SRAM n Get the signal from the software: when, where, what n Layers implementation
SLIDE 10
+Software
n Get touch signal from hardware and identify the
corresponding action
n Control the difficulty level n Implement of the main game logic n Keep track of the lives left, points earned and the action user
take
n Send signal back to the hardware
SLIDE 11
+Audio
Avalon Bus
De2_WM8731 _audio Music controller
I r q Irq
WM8731 Audio CODEC Ear plugs CPU SDRAM controller
Main.c
N ios System
Music.h
SDRAM
SLIDE 12
+ Design Key Issues
n 1.Understand how WM8731 works n 2.Tried to synthesis music. -Too simple n 3.Sample rates. 22050Hz. -killed 6000hz n 4.Store music in ROM. -slow compilation
SLIDE 13
+ Design Key Issues
- 4. Data transfer
RAM 256-2bytes Data_out 256-2bytes Shift_out 2 bytes
f = 50MHZ f = 18.432MHZ
Audio_chip IRQ
NIOS
Through Avalon Bus using interrupt request. Using buffer to buffer data transfer between clock domains
SLIDE 14
+ Design Key Issues
- 5. Structure Optimize
SLIDE 15
+ Design Key Issues
- 5. Structure Optimize
SLIDE 16
+ Design Key Issues
- 5. Structure Optimize
SLIDE 17
+ Design Key Issues
- 5. Structure Optimize
SLIDE 18
+ Design Key Issues
- 5. Structure Optimize
SLIDE 19
+ Design Key Issues
- 5. Structure Optimize
SLIDE 20
+ Design Key Issues
- 6. Merge music and sound effect
Audio = (Music + Sound)/2 Audio = Music* 1/4 + Sound * 3/4
SLIDE 21
+Lessons learned
n Hands on experience of embedded system
– interesting but time consuming
n Debug skill (both hardware and software) n Always prepare a back up plan for big
events.J
SLIDE 22
+Acknowledgement
n We WMT team would thank dear Prof. Stephen A.
Edwards and dear Professor David Lariviere for all the professional instructions and kindly help.
n At last, we really appreciate the hard work of the
TAs.
Thank you so so much!
SLIDE 23