Aspen
Garrett Earnshaw
Joe Chmura
Mieszko Kruger
Yoni Mekuria
Aspen: Objectives
 To dynamically control a network of peripheral
devices, a network that controls as well as
senses with the use of a CAN bus.
Garrett
Basic Layout
Garrett
Core Layout
Garrett
Node Layout
Garrett
Core Implementation
MC68HC908GZ16
Parts and Logic diagram
MC33388
MM74C922
4x4 Keypad
Optrex LCD
Joe
Node Implementation
MC68HC908GZ16
MC33388
Parts and Logic diagram
Joe
Node Example
Joe
MC68HC908GZ16
Specification Sheet
High-performance M68HC08 architecture optimized
for C-compilers
8-MHz internal bus frequency
16k Flash
1k RAM
408 bytes of ROM
MSCAN08 (Motorola scalable controller area
network, implementing 2.0b protocol)
Mieszko
Software processes
Core Operational
Node Operational
Diagram
Diagram
Mieszko
Memory Map
Address
$0000$003F
$0040$0440
$0440$04FF
$0500$057F
$0580$1BFF
$1C00$1D95
$1D96$BFFF
$C000$FDFF
$FE00
$FE01
$FE02
$FE03
$FE04
$FE05
Description
I/O Registers
64 bytes
RAM
1024 bytes
Unimplemented
192 bytes
MSCAN08 Control
and Message
Buffer
128 bytes
Unimplemented
5760 bytes
Flash
Programming
Routines ROM
406 bytes
Unimplemented
41,578 bytes
Flash Memory
15,872 bytes
Break Status
Register (BRS)
1 byte
SIM Reset Status
Register (SRSR)
Break Auxiliary
Register (BRKAR)
Break Flag Control
Register (BFCAR)
Interrupt Status
Register 1 (INT1)
Interrupt Status
Register 2 (INT2)
$FE06
$FE07
$FE08
$FE09
$FE0A
$FE0B
$FE0C
$FE0D$FE0F
$FE10$FE1F
$FE20$FF7D
$FF7E
$FF7F$FFD3
$FFD4$FFFF
Register 2 (INT2)
Interrupt Status
Register 3 (INT3)
Reserved
Flash Control
Register (FLCR)
Break Address
Register High
(BRKH)
Break Address
Register Low
(BRKL)
Break Status and
Control Register
(BRKSCR)
LVI Status
Register (LVISR)
Unimplemented
3 bytes
Unimplemented
16 bytes
Reserved for
Compatibility with
Monitor Code for
A-Family Part
Monitor Rom
350 bytes
Flash Block Protect
Register (FLBPR)
Unimplemented
85 bytes
Flash Vectors
44 bytes
Mieszko
Problems Encounter
 Coldfire development board = overkill.
 Redesign our core board.
 Licensing issues with CodeWarrior.
Mieszko
Cost Sheet
Item
Quantity
Price (per unit) Total per Item(s)
Standard AT power supply
1
$26.87
$26.87
RS232 Cable Male-Female
1
$13.49
$13.49
Quad Flat Pack Adapter 48QFS30-D6-SMT-S
2
$24.00
$48.00
MC68HC908GZ16 48 lead
QFP MCU
6
Donated
Donated
MC33388 CAN Physical
Layer Interface Chip
MONO8 Connectors
Simulator or emulator
software
16 Key Keypad
8 MHz Crystals
Miscelaneous Parts
Total Cost
Estimated Core Cost
Estimated Node Cost
6
2
1
6
as needed
Donated
Donated
Donated
Donated
Donated
Donated
$20.82
$0.94
$50.00
$20.82
$5.64
$50.00
$164.82
$50.19
$5-$15
Yoni
Schedule
Yoni
Division of Labor
Garrett
Mieszko
Software
Core design and build
Software
Communication
with leaves
Documentation
Yoni
Joe
Power
Power
Leaf implementation
Leaf design and build
Cabling
Yoni
Questions