Update ECUs using Delta- and Over-the-Air-Technology · PDF fileUpdate ECUs using Delta- and...
Transcript of Update ECUs using Delta- and Over-the-Air-Technology · PDF fileUpdate ECUs using Delta- and...
© 2014 Red Bend SoftwareVector Informatik GmbH
Update ECUs using Delta- and Over-the-Air-Technology
© 2014 Red Bend SoftwareVector Informatik GmbH
Market Trends
Challenges with current update methods
Vector and Red Bend approach
Demo Result
Main Benefits
Summary
Agenda
© 2014 Red Bend SoftwareVector Informatik GmbH
Market Trends – Code and ECUs3
© 2014 Red Bend SoftwareVector Informatik GmbH
The cost to the OEM
The duration of the process▪ To perform the update▪ To complete the update on the whole cars▪ For the customers
Requires trained technician
Scaling of the process▪ Serial process
Updating ECU Today – The Challenges
© 2014 Red Bend SoftwareVector Informatik GmbH
Updating ECU Today – The Process
The dealer updates
the reprogram-ming tools
Car recall
Dealer uses serial connection to update
ECU
The customer picks up
the updated vehicle
The dealer charges the OEM
for the recall labor
ECU problem identified
ECU developer
fixes problem
OEM tests new SW
OEM notifies dealers
and owners of required
recall
New version sent to
dealers on a CD
©
© 2014 Red Bend SoftwareVector Informatik GmbH
Flash Bootloader – Introduction
vFlash
Bus CAN LIN FlexRay MOST ETHERNET
ECUs with Vector Bootloader
Usage of Flashing Development EOL programming After-Sales Programming
Overview
© 2014 Red Bend SoftwareVector Informatik GmbH
Different Networks - New Challenges
ECU App
Bootloader
Network
Dat
a
Network
Flash-Tool
Network
Har
dw
are
Increased Network BandwidthNetwork type and configuration
FasterProcessingOptimal performance,highly automated
Faster ProgrammingOptimal performance, parallel processing
Reduced DataVolumeCompression, Red Bend vRM/vFuse
IntelligentData SelectionMinimal Programming
Faster Flash Erasing/WritingFast hardware derivate
How to Minimize Reprogramming Times?
© 2014 Red Bend SoftwareVector Informatik GmbH
Flashing on Different Networks
Network Bus Speed[Kilobits/s]
Data Rate [Kilobytes/s]
K-Line 19.2 – 125 ~ 1.8
LIN 19.2 ~ 0.4-0.8
CAN 500 ~ 15-25
CAN FD 4,000 ~ 80+
FlexRay 10,000 ~30-60
Ethernet 100,000 ~90-150+
Data transfer rate on current networks
© 2014 Red Bend SoftwareVector Informatik GmbH
Introduction
Start Programming Session
Perform Security Access
Write Identification, Fingerprint, …
Request Download
Transfer Data
Finish Transfer Data
Verification
Request Download
Erase Memory
Transfer Data
Finish Transfer Data
Check Consistency/Dependencies
Reset Ecu
Optional: Recommended
Optional: OEM specific
Optional: Download Flash Driver
according to ISO15765-3
Standardized Flash Programming – The Logical Sequence
Verification
© 2014 Red Bend SoftwareVector Informatik GmbH
Speed-up Flash Download
Erase: Erase flash memory areas
Transfer and program: Transfer data blocks and program into flash memory
Verification: Verify programmed data
ERASE TRANSFER and PROGRAM VERIFY
Erase flash memory
Segmented data transfer
Programming of data segment Verification
Phases of Programming
© 2014 Red Bend SoftwareVector Informatik GmbH
Speed-up Flash Download
Transmission channel is the bottleneck:
Reduce the amount of data to transfer
Flash Tool
Data or program
Data or program
vFlash
Bootloader
CommunicationStack
OEM Download Manager
Application
Security (crypto)
Data Decompression
Multiple Memory Manager
Bootloader Application Layer
Data compression
Data Compression
© 2014 Red Bend SoftwareVector Informatik GmbH
Speed-up Flash Download
Flash-Tool ECU Flash Memory
Request
Response
Write
Flash-Tool ECU Flash Memory
Request
Response
Write
Conventional Programming Pipelined Programming
Pipelined Programming: Principle
© 2014 Red Bend SoftwareVector Informatik GmbH
Pipelined Transfer–Program
Speed-up Flash DownloadSummary of optimizations
Transfer
Program
Decompression
Pipelined Transfer–Decompression–Program
Sequential transfer-programming
© 2014 Red Bend SoftwareVector Informatik GmbH
OTA Delivery
What is FOTA – Introduction to Delta Technology
Update PackageSource
Image
Target Image
vRapid Mobile Update Generator extracts only the essential differences between versions
vRapid Mobile Update Installer applies the new file to the existing software image on the device to create an updated version
Performs Device UpdateGenerates Firmware Update Package
Generated Target Image
Software Management Center is used to plan, run, optimize and monitor the update campaign
© 2014 Red Bend SoftwareVector Informatik GmbH
SoftwareVersions
SoftwareVersions
Introduction to Delta TechnologyBasics
ECU
SoftwareVersion X
SoftwareVersion
X+n
SoftwareVersions read version info
SoftwareVersion X
Software
Use version from version storage
Create new version
Calculate software delta
Transfer to ECU
Calculate and flash update to version x+n
Software Version Repository
2 variants of transfer and calculation
+n
© 2014 Red Bend SoftwareVector Informatik GmbH
Introduction to Delta Technology – Red Bend vRapid Mobile ®
First, the complete delta is transferred to the ECU
Then, at the end of the download, the new software version is calculated inplace by the update agent
ECU
Software
Version X+n
SoftwareVersion
X+n
SoftwareVersion X
Software
Software
Calculate software delta
Calculation memory
Transfer to ECU
Calculate and flash update to version x+n
Standard approach
vRM®
© 2014 Red Bend SoftwareVector Informatik GmbH
Introduction to Delta Technology –Red Bend vRapid Mobile Fuse ®
Fuse enables the smallest, most resource-constrained ECU to receive efficient software updates OTA or over cable
Delta is streamed to the bootloader with transfer data
New software version is calculated gradually
ECU
Software
Version X+n
SoftwareVersion
X+n
SoftwareVersion X
portion y Calculate software delta
Calculation memory
portion w
portion x
portion y
portion y
Portion transfer to ECU
Calculate and flash update to version x+ngradually
Streaming approach
Fuse ®
© 2014 Red Bend SoftwareVector Informatik GmbH
Vector FBL with Update AgentArchitecture
Red BendUpdate Agent
∆ LibMem
PipelinedProgramming
PipelinedVerification
© 2014 Red Bend SoftwareVector Informatik GmbH
The Motivation – Demonstrating the advantages of the integration between Vector’s Bootloader (FBL) and Red Bend FOTA (Firmware Over the Air) technology
The components –▪ Vector bootloader▪ Red Bend update agent▪ NXP - ARM7TDMI LPC2478 microcontroller
The demo script –▪ Measuring the time of a regular update process▪ Measuring the time of the new approach update
process
The Joint Solution – Demo
© 2014 Red Bend SoftwareVector Informatik GmbH
Red Bend vRM Integration
Integrate Red Bend vRM in Vector bootloader
Only send the delta over the bus
Save ~97% of size and ~70% total programming time
Recreate and program the whole image in place
Erase and program only necessary pages and sectors
0500.000
1.000.0001.500.0002.000.0002.500.0003.000.0003.500.0004.000.0004.500.000
Full Image Compressed V1-V2 Delta
Download Size in Bytes
0
50
100
150
200
250
Full Download Compression +Pipelining
V1-V2 Delta
Total Programming Time in Seconds
-43%
-71%
-37%
-97%
© 2014 Red Bend SoftwareVector Informatik GmbH
The New Approach
© 2012 Red Bend Software
Car Connectivity is Here
Audi
Tesla Renault
GM Nissan
BMW
© 2014 Red Bend SoftwareVector Informatik GmbH
ECU OTA Update
ECUECU ECU
ECUTelematics
OnBoardTester
Server
Architecture Overview
vRM
vRM
Fuse
Management
OEM Backend
© 2014 Red Bend SoftwareVector Informatik GmbH
Updating ECU OTA– The Process
The ECU is updated to the new version
ECU problem identified
ECU developer
fixes problemOEM tests new SW
OEM start an update
campaign
© 2014 Red Bend SoftwareVector Informatik GmbH
Software Update Anywhere@ Home
@ Dealer
@ Post Production
@ Production @ Enterprise/Fleet
© 2014 Red Bend SoftwareVector Informatik GmbH
Seamless integration between the FBL and the update agent
Achieving update time reduction of more then 70%
No impact on existing process in production or at the dealership
Fail safe process
De-couple the download process from the re-programming process
Enable OTA update, and thus enhancing the customer experience by avoiding painful dealer cycle recalls
The Joint Solution Benefit
© 2014 Red Bend SoftwareVector Informatik GmbH
Thank you for your attention.
For detailed information aboutRed Bend or Vector Software please visit
http://www.redbend.comwww.vector.com