1 Chapter 2: Design of Algorithms Representing algorithms How to express algorithms the best? Possible solutions: Natural language Programming language Pseudo-Code Natural language + Known by everyone (that speaks it) -- Hides the structure of the algorithm -- Allows ambiguity in expressions Programming language + Language that computer understands (e.g. Fortran, C, Pascal) + Very exact and well structured -- Very restrictive particularly in early design phases
Player Guitar Critical Design Review Lucas Gilbride Rick Denney Dan Forrester Randy Hood Lucas Gilbride Rick Denney Dan Forrester Randy Hood.
Dec 21, 2015
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Player GuitarCritical Design Review
Player GuitarCritical Design Review
Lucas GilbrideRick DenneyDan ForresterRandy Hood
Lucas GilbrideRick DenneyDan ForresterRandy Hood
IntroductionIntroduction
Our project is a device that plays downloaded music in MIDI format on an acoustic guitar. The design will use stepper motors attached to guitar picks to pluck the strings and will use solenoids to depress the strings so that different notes can be strummed.
Our project is a device that plays downloaded music in MIDI format on an acoustic guitar. The design will use stepper motors attached to guitar picks to pluck the strings and will use solenoids to depress the strings so that different notes can be strummed.
Presentation OverviewPresentation Overview
System OverviewHardware setup
Central Control UnitSolenoids &
Software PlanData FlowMIDI confusion
AdminScheduleDivision of labor
System OverviewHardware setup
Central Control UnitSolenoids &
Software PlanData FlowMIDI confusion
AdminScheduleDivision of labor
Hardware OverviewHardware Overview
User Interface
Microprocessor
RAM
ROM
MIDI Decoder(Optional
)
FPGA
Motor and Solenoid Controllers
Pick Motors
SolenoidsFlash Card
Central Control UnitCentral Control Unit Motorolla MC68HC11 Microprocessor Xilinx Spartan XCS10 FPGA ATMEL AT29C256 EPROM OKI M51257AL-10 RAM RALTRON CO6050-T 8.000 MHz clock Xilinx 18V256JC EEPROM Fairchild MC74HC373N Transparent Latch Texas Inst. SN74HC245N Bus Transceiver Power Circuitry:
Fairchild MC7805C 5V Regulator Fairchild 1587T33 3.3V Regulator
Motorolla MC68HC11 Microprocessor Xilinx Spartan XCS10 FPGA ATMEL AT29C256 EPROM OKI M51257AL-10 RAM RALTRON CO6050-T 8.000 MHz clock Xilinx 18V256JC EEPROM Fairchild MC74HC373N Transparent Latch Texas Inst. SN74HC245N Bus Transceiver Power Circuitry:
Fairchild MC7805C 5V Regulator Fairchild 1587T33 3.3V Regulator
Microprocessor SchematicMicroprocessor Schematic
RAM/ROM DiagramRAM/ROM Diagram
FPGA SchematicFPGA Schematic
SolenoidsSolenoids
Solenoids will be used to hold down strings in order to play notes. A solenoid will be picked basedon its size and power characteristics.The end of each solenoid will be padded in order to prevent damage to the guitar.
SOLENOID SETUPSOLENOID SETUP
Max Force: 2 lbsMin Force: 1 lbs
Stepper MotorsStepper Motors
Stepper motors will be used to strum the six strings on the guitar. The stepper motor used will be pick based on its size, price, and power specifications.
Still to come…Still to come…
Compact Flash Card
User InterfaceOn/off, play, track selectPossible LCD
Compact Flash Card
User InterfaceOn/off, play, track selectPossible LCD
Software OverviewSoftware Overview
User Interface OperatingSystem
MIDI Decoder
Flash Driver MIDIs to RAM
Data flow chartData flow chart
Flash CardFlash Card HC11HC11 RAMRAM
FPGAFPGA
MIDI
Modified MIDI
Note On/Off CodesPick Codes
Solenoid &Motor DriversSolenoid &
Motor Drivers SolenoidsSolenoidsStepper Motors
Stepper Motors
Separate Data Lines
Basic MIDI EventsBasic MIDI Events
90 3C 40 delta time
Midi Function:Note OnNote Off
Note:This caseMiddle C
Note Velocity
Time until Next Midi
Event
Midi InterpretationMidi Interpretation
Implement a parsing algorithmDecode Midi File Send Midi Command (Note On/Off) to
solenoids and stepper motors via FPGA
Wait designated delta timeRead next Midi Command and repeat
Implement a parsing algorithmDecode Midi File Send Midi Command (Note On/Off) to
solenoids and stepper motors via FPGA
Wait designated delta timeRead next Midi Command and repeat
ROM Test CodeROM Test Code
“WE’VE NOP’D!”
RAM Test CodeRAM Test Code
Division of LaborDivision of Labor
RandyMicroprocessorUser Interface
LucasFPGA
Mechanics
RickMIDI
(Reading and Storage)
DanMechanics
Overall Assembly
ScheduleSchedule
MilestonesMilestonesCDR
Research/Test ComponentsWorking ROM/RAM Understanding of Microprocessor
architecture Milestone 1
Implemented FPGA logicCompleted MIDI translator codeWorking motor and solenoid driversMechanics completed
CDRResearch/Test ComponentsWorking ROM/RAM Understanding of Microprocessor
architecture Milestone 1
Implemented FPGA logicCompleted MIDI translator codeWorking motor and solenoid driversMechanics completed
Milestones Cont.Milestones Cont.
Milestone 2Combine Code and SubsystemsBegin testing, debugging, and optimizing
ExpoFull functional designCosmetics addedPossible design extensions
More fretsImproved User Interface (LCD display)Rockin’ songs
Milestone 2Combine Code and SubsystemsBegin testing, debugging, and optimizing
ExpoFull functional designCosmetics addedPossible design extensions
More fretsImproved User Interface (LCD display)Rockin’ songs
Any Questions?Any Questions?
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