Acceleration%20Sensor%20SPI%20Emulator

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Acceleration Sensor SPI Emulator
UNIVERSITATEA POLITEHNICA DIN
TIMISOARA FACULTATEA DE ELECTRONICA SI
TELECOMUNICATII DEPARTAMENTUL DE ELECTRONICA
APLICATA
Author MIHAILESCU Andrei-Bogdan
Thesis adviser Associate Professor Ph.D. Eng.
JIVET Ioan
TIMISOARA 2010
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Acknowledgement

• The present diploma project has been developed in
  the period 15th September 2009- 30th June 2010 as
  a research project in collaboration with
  Politehnica University Timisoara, eAustria
  Research Institute Timisoara and BeeSpeed
  Automatizari Timisoara (as a subcontractor for
  TRW, CIAT department, from Koblenz, Germany).

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Presentation Overview

1. Why this project?
2. Architecture overview
3. Sensor
4. CPLD
5. Microcontroller
6. Big Picture
7. Questions

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Why this project?

• Title explanation
• SPI
• (Serial Peripheral Interface)
• with
• 2. Target use

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Architecture overview
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Sensor
VTI SCA2120-D07 Accelerometer

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CPLD

• Xilinx XC95288XL CPLD
• 6 ns. pin to pin login delay
• System frequency up to 208 Mhz
• Available in 144 pin TQFP package (easy
  soldering, even by hand)
• Low power operation
• 5V tolerant I/O pins accept 5V, 3.3 V and 2.5 V
  signals
• In-system programmable
• Local clock inversion with 3 global and 1
  product-term clocks
• Full IEEE Standard 1149.1 boundary scan (JTAG)
• 6400 usable gates
• 288 macrocells

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CPLD role

• Operation
• -Step 1 understand request from the VSC
• -Step 2 see if data is available from the uC or
  information is to be parsed directly from the
  sensor
• Step 3send the data to the VSC.

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uC

• uC Board
• TQM164C minimodule
• uC Role
• ADC port information
• CAN (Controller Area Network)
• Hardware-in-the-Loop interface
• Transmission of simulation values
• To the CPLD (3-wire SPI)

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uC Role
ADC information processing Acceleration Voltage
range is 03.3V. 0g value 1.65 V Resolution
0.59V/g Temperature Voltage range is 0
3.3V 23C value 1.65 V Resolution 10mV/C
Frame D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
X x x 0 0 12bit Data ( Dout154) 12bit Data ( Dout154) 12bit Data ( Dout154) 12bit Data ( Dout154) 12bit Data ( Dout154) 12bit Data ( Dout154) 12bit Data ( Dout154) 12bit Data ( Dout154) 12bit Data ( Dout154) 12bit Data ( Dout154) 12bit Data ( Dout154) 12bit Data ( Dout154)
Y x x 0 1 12bit Data ( Dout154) 12bit Data ( Dout154) 12bit Data ( Dout154) 12bit Data ( Dout154) 12bit Data ( Dout154) 12bit Data ( Dout154) 12bit Data ( Dout154) 12bit Data ( Dout154) 12bit Data ( Dout154) 12bit Data ( Dout154) 12bit Data ( Dout154) 12bit Data ( Dout154)
Z x x 1 0 12bit Data 12bit Data 12bit Data 12bit Data 12bit Data 12bit Data 12bit Data 12bit Data 12bit Data 12bit Data 12bit Data 12bit Data
Temp x x 1 1 x x 10bit Data 10bit Data 10bit Data 10bit Data 10bit Data 10bit Data 10bit Data 10bit Data 10bit Data 10bit Data
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Big picture
CPLD
uC
Sensor
ADC interface
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Conclusion
TRW Hardware-in-the-Loop System

• Circuit capabilities
• Simulation capabilities of the acceleration
  sensor
• Analogical input for simulation values thru ADC
  port
• Fault injection capabilities
• CAN simulation values injection and debugging (in
  progress)
• Integration with Hardware-in-the-Loop system for
  TRW