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Technion - Israel institute of technology department of Electrical Engineering. הטכניון - מכון טכנולוגי לישראל הפקולטה להנדסת חשמל. המעבדה למערכות ספרתיות מהירות. High Speed Digital Systems Laboratory. Final Presentation. Smart Door Controller. Performed by: Kobbi Kfir-El - PowerPoint PPT Presentation
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Performed by: Kobbi Kfir-ElOhad Brandelstein
Instructor: Konstantin Sinyuk
High Speed Digital Systems Laboratoryהמעבדה למערכות ספרתיות מהירות
הטכניון - מכון טכנולוגי לישראל
הפקולטה להנדסת חשמל
Technion - Israel institute of technologydepartment of Electrical Engineering
Final Presentation
Smart Door Controller
Spring semester 2004
SDC visionSDC vision
SDC visionSDC vision
ServerLAN 2 CAN
CAN
Door 1Door 2Door 3
Web
Remote station
Initial project goalsInitial project goals
Lab’s board validationLab’s board validation Implementations:Implementations:
CAN transportationCAN transportation SDC operating systemSDC operating system Server softwareServer software Integration of peripherals under RT Integration of peripherals under RT
demandsdemands Network behavior & performancesNetwork behavior & performances
Getting startedGetting startedLab’s board validation:Lab’s board validation:
Operating all peripherals devicesOperating all peripherals devices KeypadKeypad Magnetic card readersMagnetic card readers I2C module (EPROM, Thermometer)I2C module (EPROM, Thermometer) LCD screen, Buzzer, LedsLCD screen, Buzzer, Leds USARTUSART
Operating all PIC relevant modules:Operating all PIC relevant modules: ISR (Interrupt Service Routine)ISR (Interrupt Service Routine) TimersTimers CANCAN
DifficultiesDifficulties SDC card : SDC card :
Stability & Reliability : Different results in same Stability & Reliability : Different results in same program program during developmentduring development
Unable operating CAN, LCD modules Unable operating CAN, LCD modules Keypad : Needed modifications.Keypad : Needed modifications. Lab equipment : Lab equipment :
Insufficient Demo boards, Computers.Insufficient Demo boards, Computers.
CCBBAA00
DD998877
EE665544
FF332211
ProgressProgress
April 04 ------------- Characterization Presentation
Getting familiar with PIC Tools Basic SDC Power Up
May 04 ------------- Half Semester Presentation
May – September -- Stuck at Basic Power Up
October -------------- New Project Goals April 05 -------------- Final Presentation
Redefinition of project Redefinition of project goalsgoals
Completion of project Implementation on PICDEM2 demo
boards Create prototype of a RT access
system controller Operate CAN protocol between 2
boards Enable Magnetic card reader usage
Redefinition of project Redefinition of project goalsgoals
LCDThermometer EPROEPROMM
Key pad Magnetic card
CAN
SDC PrototypeSDC Prototype
Simple operating systemSimple operating system Resources management (ISR, Timers, Resources management (ISR, Timers,
EPROM)EPROM) I/O handlersI/O handlers InterfaceInterface
CAN implementationCAN implementation Master / SlaveMaster / Slave Protocol fundamentalsProtocol fundamentals
SDC PrototypeSDC PrototypeOperating System ImplementationOperating System Implementation
I/O I/O devicedeviceExternal External
interruptinterrupt
Main routineMain routineChecking temperatureChecking temperature
Checking flagsChecking flags
ISRISRService InterruptService Interrupt
(priority)(priority)
Handle interrupt Handle interrupt eventevent
Flag ON Flag ON
ExecuteExecute
Flag eventFlag event
Timer/CANTimer/CAN
Internal Internal interruptinterrupt
Flag OFF Flag OFF
Solution - Hash table ( RT ) Solution - Hash table ( RT ) Hash code - last 3 digits of IDHash code - last 3 digits of ID Hash properties:Hash properties:
Insert O(1)Insert O(1) Delete O(1)Delete O(1) Search O(1)Search O(1)
Principle of search:Principle of search: First look in relevant cell, if full look in First look in relevant cell, if full look in
STACK.STACK.
SDC PrototypeSDC PrototypeData management (EPROM)Data management (EPROM)
SDC PrototypeSDC PrototypeData management (EPROM)Data management (EPROM)
32750
30020
30010
100687566030000
29990
29980
29970
80
70
200521656060
100586652050
100662593040
100164982030
20
10
00085257500
9876543210ADDRESS
Stack
Cell 0 (000)Cell 0 (000)
Cell 1 (001)Cell 1 (001)
Cell 2 (002)Cell 2 (002)
Cell 999 Cell 999 (999)(999)
32Kbyt32Kbytee
SDC PrototypeSDC PrototypeCAN protocol & transportationCAN protocol & transportation
Master / Slave implementationMaster / Slave implementation Master ( Server ) - knows all SDC’s Master ( Server ) - knows all SDC’s
( nodes )( nodes ) Slave ( SDC controller ) - knows only Slave ( SDC controller ) - knows only
the masterthe master Every node has unique IDEvery node has unique ID
MasterMaster
SlaveSlave SlaveSlave SlaveSlave SlaveSlave
CANCAN
SDC PrototypeSDC PrototypeCAN protocol & transportationCAN protocol & transportation
Slave : Slave : Transmits to CAN bus, own ID Transmits to CAN bus, own ID Listens only to messages with it’s ID - Listens only to messages with it’s ID -
Implemented by Filters & Masks Implemented by Filters & Masks mechanism mechanism
Master : Master : Listens to CAN bus, response to all nodesListens to CAN bus, response to all nodes Transmits emergency messages to all Transmits emergency messages to all
nodes (broadcast)nodes (broadcast) Transmits to specific node Transmits to specific node
SDC PrototypeSDC PrototypeCAN protocol & transportationCAN protocol & transportation
CAN message - 3 main fields CAN message - 3 main fields ArbitrationArbitration, , Control, Data.Control, Data.
Arbitration field: Arbitration field:
MaskMask Master 111100000000Master 111100000000 Slave 111111111111Slave 111111111111
MSG TypeMSG TypeNode IDNode ID
0000110000000000001111
ArbitratioArbitrationn
ControControll
DataData
Lab’s board problemsLab’s board problems PIC 18f458 : wrong type PIC 18f458 : wrong type PLCC
instead of TQFP Suspected mismatch in connecting Suspected mismatch in connecting
PIC to SDC board. - result: LCD not PIC to SDC board. - result: LCD not functioning functioning
Both CAN transceivers not operatingBoth CAN transceivers not operating
PLCCPLCC TQFPTQFP
Lab’s board problemsLab’s board problems
Connections - antennas, short Connections - antennas, short welding might cause unstable welding might cause unstable behaviorbehavior
Finding SDC problemsFinding SDC problems
LA, DVMLA, DVM
testingtesting
SDC runningSDC running
Same programSame program
Programming Programming
module on module on
Demo BoardDemo Board
CompareCompare
Good resultsGood results
ConclusionsConclusions
Bad resultsBad results
Project benefitsProject benefits (what we learned…)
Read hardware specifications Learn about MCU’s System design, implementation and
integration Basic understanding of hardware Communication protocols: I2C, CAN Lab equipment usage : DVM, Logical
Analyzer Experience: Wire-up, Welding Use the Internet as a help tool Use Wire-up prototype prior to board design
SummerySummery Final project exceeds redefined goalsredefined goals Original design compatibility was kept Project can be defined as a reference
design for future groups Redesign must take in mind a different
MCU: Problems with multi interrupt scenario Tool supported by better debuggerTool supported by better debugger