Transcript PIC Evaluation/ Development Board

PIC Evaluation/
Development
Board
Dec02-12
December 10, 2002
Client: ECpE Department
Faculty Advisors: Dr. Rover, Dr. Weber
Chad Berg, Luke Bishop, Tyson Stichka, Nick Veys
Presentation Outline
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Problem Statement
Design Objectives
End-Product Description
Assumptions/Limitations
Project Risks/Concerns
Technical Approach
Evaluation of Project Success
Recommendations for Future Work
Human/Financial Budgets
Lessons Learned
Closing Summary
Problem Statement
Many project implementations require the
use of a microcontroller
 However, the development of a Peripheral
Interface Controller (PIC) solution is often
beyond the expertise and available time of
the design team
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Design Objectives
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Design and implement a board to enable
future senior design teams to quickly and
easily use a PIC solution in their projects
 Flexible
 Easy
to Use
 Cost Efficient
 Software Libraries
End-Product Description
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Microchip 16F876 Based Solution
 CAN
Interface
 Character LCD Display
 7 Segment Displays
 Serial (RS232) Interface
 Temperature Sensor
 Speaker
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Software Libraries for All Components
Assumptions/Limitations
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Assumptions:
 Users
have an electrical/computer engineering
background
 Users have access to a personal computer with a free
parallel port
 Users have C programming skills
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Limitations:
 Budget
of $100
 Size Constraints
 Environmental Constraints
Project Risks/Concerns
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Design Error
 Over
100 traces and 200 pins
 Software depends on working hardware
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Device Failure
 Socket
interfaces were used for crucial
components
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Loss of a Team Member
Technical Approach
The requirements for this project were
relatively open-ended
 The 16F876 was chosen for versatility
 CAN interface provides interoperability
with industrial/automotive equipment
 Other devices were chosen for their uses
in practical applications
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Technical Approach
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C was chosen for rapid development
The following libraries were implemented
 Character
LCD
 RS232
 Seven
segment displays
 CAN
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Initialization and diagnostic routine was also
created
Technical Approach
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Programmer
 P16Pro
compatible hardware
 Parallel port interface
 Cheap, reliable
 Lots of software support
Technical Approach
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Eagle was used for schematic and PCB
 Widely
used, supported
 Simple, powerful interface
 Linux/Windows support
 Provides schematic capture and PCB layout
Technical Approach
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Schematic Capture using custom-made parts
Form logical connections for use in PCB layout
Technical Approach
Technical Approach
Project Success
Milestone
Percent Completed
Project Definition
100
Subsystems Designed
100
Board Layout Completed & Simulated
100
Peripheral Subsystems Prototyped and Tested
100
Prototype Board Assembled
100
Programming Environment Developed
100
Supported PIC Tested Successfully
100
C Libraries Developed
100
Full Documentation Written & User Tested
100
Sample Code for Every Module Written
100
Final Board Operational
100
Project Total
100
Further Work
Use the design provided to create even
better senior design projects
 Additional pins available on the PIC for
future expansion
 Design is flexible enough to be customized
for a particular project
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Human Budget
Team Member
Original Estimated
Effort
Revised Estimated
Effort
Actual Final
Effort
Chad Berg
65 Hours
129 Hours
105 Hours
Luke Bishop
60 Hours
140 Hours
107 Hours
Tyson Stichka
62 Hours
126 Hours
98 Hours
Nicholas Veys
70 Hours
134 Hours
119 Hours
257 Hours
529 Hours
429 Hours
Totals
Financial Budget
Item
Original
Estimated Cost
Revised
Estimated Cost
Actual Final
Cost
Electronic Components
$30
$30
$20.44
Character LCD Display
$30
$30
$0
Dual-Layer PCB
$70
$70
$34
$6
$6
$9.95
PIC Microcontroller
$20
$20
$8.19
Poster
$15
$80
$80
P16PRO40 Programmer
$0
$20
$18.95
Hi-Tech C Compiler
$0
$1000
$0
$171
$1256
$171.53
Power Supply
Total
Lessons Learned
Being a team doesn’t mean doing
everything together!
 Tasks must be divided between team
members to finish on time
 Each member must take responsibility for
delivering
 Communication
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Summary
A flexible PIC development solution is
important for future senior design students
 This design costs half of comparable
commercial products
 The software libraries provide significant
additional value
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Q&A