development of a modern airbag system prototype · airbag soc asic m ain µ c satellite sensors...

Development of a modern Airbag System Prototype COSIDE User Experience

Dr. Thang Nguyen (Infineon Technologies Austria AG)

SystemC AMS – COSIDE® User Group Meeting 2014

Agenda

1. Overview of Airbag System Application

2. Motivations

3. FPGA-based Development Framework

4. Accelerated System Co-Verification Framework

5. COSIDE Use Cases by IFAT

6. Real-life case study

set date Copyright © Infineon Technologies AG 2013. All rights reserved.

Airbag System Application – Overview & Challenges


Airbag SoCASIC

Main µC

Satellite Sensors (upfront & side impact, g-sensor,

buckle switches...)

Airbag ECU

Actuators (Squibs)

Airbag System Overview(Sensors <--> Controller <--> Actuators)

SP

I_IFa

na

log

ue

an

alo

gu

e

Embedded

SW

Target System-under-Evaluation • Sophisticated = Safety Critical Real-

time Embedded (SW/FW) Mixed-Signal

• Cost-Reduction = high integration

challenges in verification effort

ModuleReg_IF

ModuleDigital Logic

Sub-System Digital (RTL)

A/D

_IF

Digital CORE

SPIHW

FW

Digital Toplevel

CENTRAL_Dig (RTL)

(RTL)

SoC Power SupplyModels SoC_PWR

Safing_Engine (SE)

SE - Digital CORE

SPIHW

SE_AFEModel(VHDL)

(RTL)

A/D

_IF

SMPS Modules(Buck/Boost

Converter)(VHDL)

iPSG(VHDL)

CENTRAL_AFE(Diagnostic and

Monitoring)Model(VHDL)

LVRs(VHDL)

Supply_net

rese

t

Sup

ply

_ne

t

Sup

ply

_ne

t

Airbag SoC Chipset TL Architecture

sys_

clk

iLVRs(VHDL)

Modules AFE

Sensor_IF(PSI or DSI)

SQB_Driver x Loops HS&LS

Vo

lta

ge

Me

asu

rem

en

t

Watchdog

GPA-IO

PWR_Train IF (CAN/LIN)

Main

µCSPI_IF

On-Board Sensors

SMPS_Dig and LVRs_Dig (RTL)

Motivations

4

Interactive Concept Development

Support test scenario where SIM is impractical

Early (before Integration&Test)

Concept Verification

System Validation

Late bugs are expensive!!

2014-01-0240

Rapid Prototyping (Emulation) can help!

FPGA-based Development Workflow


Ref: Nguyen.T (IFAT) et. Wooters.S (TRW), SAE 2014 "FPGA-Based Development for Sophisticated Automotive Embedded Safety Critical System"

Advantages of FPGA-based SoC Emulation System


Accelerated System Co-Verification Framework


Design Sign-Off

HIL basedTester

DU

T

Imple

menta

tions

DUTMixed

Abstraction

DUTSystemC

(behavioral)

DUT-FPGA Prototype

DUT-ASIC Silicon

Simulation based Environment

UVM-SystemC Environment

re-use

MonitorDriver

UVM-SystemCEnvironment

MonitorDriver

Lab ValidationVerification

Test

Environm

ent

Abstraction level

Highlights:

Acceleration of verification activity, including scenarios which are impractical for simulation

Reuse Link between Pre-SI and Lab Evaluation

Cost-effective HIL-based tester, e.g.: Zedboard vs. dSPACE

UVM Layering concept

Ref: Nguyen.T (IFAT) et. P.Erhlich, T.Vörtler (FhG), DVCON Europe 2014 "UVM-SystemC based HIL-Simulations for accelerated System Co-Verification"

Use Cases by IFAT

1. FPGA Toplevel Integration and Front-End Design

especially, Analog Functional Stub Modeling

2. Supporting FPGA Back-End Implementation

a) Scripting for Xilinx ISE for System HW realization

b) Data2Mem scripting for System Firmware update

3. Verification & Lab Validation of the Prototype

a) Test Scenarios Development

b) Test Stimulus Development and Validation

c) Test Bench Generation and Test execution (@ SIM & physical HW)

d) SIM root-cause analysis and bug-fix testing support


Case study: Real-life Airbag SoC Sensor IF


DSI3 Sensor Emulyzer/RealDSI3 Sensor

Emulyzer/RealDSI3 Sensor Emulyzer/Real

FPGA_SoC_TOP

Main µC/SPI

Emulator

Airbag_Dig

Sensor TxR logic

(DUT1)SP

I H

W I

F

Ext

_Dat

aX_

IF

TC_Board

AFE Analogue TC

(DUT2)

Ext

_Dat

aX_

IF

DSI/PSI Sensor Emulyzer/Real

init_sync

Trans_ctrl

12

/2

4/

36

Mh

Z

Vdsi_X

(X=1..6)

SPI_IF

FPGA Mother BoardWorkstation with StubFnc Ctrl Software

RS232/RJ-45

Airbag_AFEStubFunC

· Testing/evaluating the new implementation of sensor TxR

· Paremetric testing of AFE circuit implementation

HIL_Tester, e.g.: Zedboard with the

reuse of UVM-SystemC TB

development of a modern airbag system prototype · airbag soc asic m ain µ c satellite sensors...

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