1 detailed design review hybrid audio dynamics processor team lead: william sender jeffrey auclair...
TRANSCRIPT
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Detailed Design ReviewHybrid Audio Dynamics Processor
Team Lead: William SenderJeffrey AuclairBryan Beatrez Michael Ferry
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Agenda● Problem Definition
○ Problem Statement○ Customer Requirements○ Engineering Requirements
● System Design○ Functional Decomposition○ System Architecture
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Agenda● Detailed Design
○ Embedded Design○ Hardware Design○ Software Design○ Auto-Mode○ BOM○ Risk Assessment
● MSD II Plan
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Section One
Problem Definition
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Problem Statement• Audio amplitude control for motion picture shows.• Maintain the quality and dynamics of the sound.• Improve flexibility while maintaining audio quality.• Maintain usability that of previous devices.
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Customer Requirements
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Engineering Requirements
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Section Two
System Design
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Functional Decomposition
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System Architecture
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Section Three
Detailed Design
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Embedded DesignLQFP1000
Block Net Pin Number Pin Name Pin TypeI/O Struct. Alternative Functions Additional Functions
ADC Audio In 1 23 PA0 I/O TTa
USART2_CTS,TIM2_CH1_ETRTIM8_BKIN,TIM8_ETR,TSC_G1_IO1,COMP1_OUT, EVENTOUT
ADC1_IN1, COMP1_INM,RTC_ TAMP2, WKUP1,COMP7_INP
ADC Audio In 2 24 PA1 I/O TTa
USART2_RTS, TIM2_CH2,TSC_G1_IO2, TIM15_CH1N,RTC_REFIN, EVENTOUT
ADC1_IN2, COMP1_INP,OPAMP1_VINP, OPAMP3_VINP
ADC GND 20 VSSA/VREF- S - Analog Ground/Negative Reference Voltage
ADC 3V3 21 VREF+ S - Postitive Reference Voltage
ADC 3V3 22 VDDA S - Analog Power Supply
Bypass Relay_1 1 PE2 I/O FTTRACECK, TIM3_CH1,TSC_G7_IO1, EVENTOUT -
Bypass Relay_2 2 PE3 I/O FTTRACED0, TIM3_CH2,TSC_G7_IO2, EVENTOUT -
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Embedded Design
Block Net Pin Number Pin Name Pin TypeI/O Struct. Alternative Functions Additional Functions
Rotary & Back A~C 38 PE7 I/O TTa TIM1_ETR, EVENTOUT ADC3_IN13, COMP4_INP
Rotary & Back B~C 39 PE8 I/O TTa TIM1_CH1N, EVENTOUT COMP4_INM, ADC34_IN6
Rotary & Back PB 40 PE9 I/O TTa TIM1_CH1, EVENTOUT ADC3_IN2
Rotary & Back BB 41 PE10 I/O TTa TIM1_CH2N, EVENTOUT ADC3_IN14
Display I2C_D 76 PA14 I/O FTf
I2C1_SDA, USART2_TX, TIM8_CH2,TIM1_BKIN, TSC_G4_IO4, SWCLK-JTCK, EVENTOUT
-
Display I2C_C 77 PA15 I/O FTf
I2C1_SCL, SPI1_NSS, SPI3_NSS, I2S3_WS, JTDI, USART2_RX, TIM1_BKIN, TIM2_CH1_ETR, TIM8_CH1, EVENTOUT
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Embedded DesignBlock Net Pin Num. Pin Name Pin Type I/O Struct. Alternative Functions Additional Functions
DAC CH1_CV 29 PA4 I/O TTaSPI1_NSS, SPI3_NSS, I2S3_WS, USART2_CK, TSC_G2_IO1, TIM3_CH2, EVENTOUT
ADC2_IN1, DAC1_OUT1, OPAMP4_VINP, COMP1_INM, COMP2_INM, COMP3_INMCOMP4_INM, COMP5_INMCOMP6_INM,COMP7_INM
DAC CH2_CV 30 PA5 I/O TTaSPI1_SCK, TIM2_CH1_ETR, TSC_G2_IO2, EVENTOUT
ADC2_IN2, DAC1_OUT2, OPAMP1_VINP, OPAMP2_VINM, OPAMP3_VINP COMP1_INM, COMP2_INM, COMP3_INMCOMP4_INM, COMP7_INMCOMP5_INMCOMP6_INM,
PWMCH1_MUG 71 PA12 I/O FT
USART1_RTS, USB_DP, CAN_TX, TIM1_CH2N, TIM1_ETR, TIM4_CH2, TIM16_CH1, COMP2_OUT, EVENTOUT
-
PWMCH2_MUG 91 PB5 I/O FT
SPI3_MOSI, SPI1_MOSI, I2S3_SD, I2C1_SMBA, USART2_CK, TIM16_BKIN, TIM3_CH2, TIM8_CH3N, TIM17_CH1, EVENTOUT
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Embedded Design
Timer Use Counter Resolution
TIM6 DAC Trigger Generation 16-bit
TIM7 DAC Trigger Generation 16-bit
TIM16 Make Up Gain 1 PWM 16-bit
TIM17 Make Up Gain 2 PWM 16-bit
TIM1 Attack/Release Timer 32-bit
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Embedded Design (Clk Tree)
- External Crystal 24 Mhz- System Clock 72 Mhz- Make-up gain timers: Tim 16,17 (16-bit)- DAC timers: 6, 7 (16-bit)- Attack and release timer: Tim 1 (32-bit)- 12-bit SAR ADC: ADC1_IN1, ADC1_IN2
- SYSclk divided by 64 results in the desired sample rate.
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Embedded DesignNet Pin Number Pin Name Pin Type I/O Struct Alternate Functions Additional Functions
3V3 1 VBAT S - Backup Power Supply
OSC 12PF0-OSC_IN I/O FTf TIM1_CH3N, I2C2_SDA OSC_IN
OSC 13PF1-OSC_OUT I/O FTf I2C2_SCL OSC_OUT
SW 14 NRST I/O RST Device reset input / internal reset output (active low)
3V3 28 VDD_4 S - - -
GND 49 VSS_2 S - Digital Ground
3V3 50 VDD_2 S - Digital Power Supply
GND 74 VSS_3 S - Ground
3V3 75 VDD_3 S - Digital Power Supply
SW 94 BOOT0 I B Boot Memory Selection
GND 99 VSS_1 S - Ground
3V3 100 VDD_1 S - Digital Power Supply
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Hardware
● Current calculations for power supply design
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Hardware
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Hardware
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Hardware
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Hardware
● Top Level Design
● Each block is a detailed subsystem
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Hardware
● Schematic for simulation
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Hardware
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Hardware
● Input Section● Takes balanced differential
audio input and creates debalanced signal
● Also provides BPF
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Hardware
● Precision Rectifier
● Allows rectification of signal while combating diode non-idealities (Forward drop, recovery time)
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Hardware
● Gain Control Section● Allows for signal to be
attenuated via CV- signal and gained up via CV+ signal.
● VCA is a current in/current out device that requires a transimpedance output section
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Hardware● Output Line Driver● Capable of driving
600 Ohm output with 6dB of gain
● Output DC common mode protect
● RFI protection and surge protection
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Hardware
● LPF Filter Design
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Hardware
● Anti-aliasing LPF● Provides
accurate sampled signal
● Chebyshev Design with 0.26dB ripple
● -3dB @ 20kHz● -40db @ 49kHz
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Hardware
● Monte-Carlo Analysis
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Hardware
● Microcontroller● It’s fast, which is cool● It likes having capacitors
nearby
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Hardware
● Takes 3.3V signals from the microcontroller and converts them to 5V.
● Same in either direction.
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Hardware
● Relays provide true bypass● Diode protected
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Software Top-Level
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Software Main Function
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Software chooseCompress (Attack)
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Software chooseCompress (Release)
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Software Compression
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Software AutoMode Params
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Software Pseudo Code
Break from powerpoint to show pseudo code
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Auto ModeAuto mode block diagram:
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Auto ModeSuccessive algorithm
-The active low enable refers to the idea that you would only need to improve your compression settings if gain reduction was occurring in the safety compression block.
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Auto ModeSafety Mode- When auto mode is initialized this all the signal conditioning that occurs.
- Safety mode is a limiter to the incoming signal, +3dbu threshold 20:1 ratio.
- It also helps balance the system by feeding back compression data.
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Auto Mode (Improved Compression Settings)
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Auto Mode (Improved Compression Settings) - The improved compression will be developed from the product of each
sample exceeding the safety compression threshold and how much it is exceeded by.
(Sample Value - Threshold) X (# of Samples Exceeding Threshold) = Offset
- This offset will be added to the index of an array containing improved compression settings.
- It is important to note that in the event the above product is very small the offset will slowly make the compression settings less aggressive in order to not over compress.
- the offset will also be scaled appropriately for the array of improved compression settings.
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Bill of MaterialsComponet Price Componet Price
Power Supply $40.97 Rectifier $6.00
Level Shift $0.940 VCA $16.92
MCU $16.82 Output Stage $26.10
Relays $9.78 LPF $6.04
Input Stage $3.24 Chasis $87.90
$214.71
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Bill of MaterialsBreak from powerpoint to show full Bill of Materials
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Risks
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Week 1
-Finish unfinished business from MSDI
-Get micro working with prototype board
Weeks 2-5
-Layout PCB
-Start prototyping code
-Populate PCBs
MSDII Plan
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Weeks 6-9
-Test software
-Test hardware
-Machine the enclosure
Weeks 10-15
-Qualitative Tests
-Create poster
-Iterate until satisfied
MSDII Plan
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Questions
?