The document discusses bootloaders in automotive electronics, explaining their purpose, functionalities, and the process of traditional flashing. It highlights the cost-saving advantages of using bootloaders over JTAG connectors, along with the importance of security and accessibility in communication. Key terms and references related to bootloaders and debugging protocols are also provided.

1. BOOTLOADER
MEDHAT HUSSAIN

2. AGENDA
• Terms
• Traditional flashing
• What is a Bootloader (the inside)!
• Why a Bootloader.
• References

3. TERMS
• JTAG: Joint Test Action Group
• UDS: Unified Diagnostic Services (ISO 14229-1)
• ISO: International Organization for Standardization
• OSI: Open System Interconnection

4. TRADITIONAL FLASHING
Using the debugging ports/protocols
• Debugging protocols
• Jtag
• Nexus

5. TRADITIONAL FLASHING

6. WHAT IS A BOOTLOADER ?
Bootloader : is a full Software parallel to the ECU main functionality that has some special functionalities.
• How to get there ?
• How to communicate with?
• What is inside
• Why for flashing?
Main
Functionality
Bootloader
Functional Test
IVT

7. BOOTLOADER COMMUNICATION
PC ECU
CAN
Bootloader Client
Bootloader
U
D
S
U
D
S

8. BOOTLOADER COMMUNICATION

9. WHAT IS A BOOTLOADER (THE INSIDE)?

10. WHY DO WE FLASH WITH BOOTLOADER ?
• Cost.
• Security .
• Accessibility.

11. COST
• No JTAG connector in the ECU.  One car could contain more than 70 ECUs
• JTAG adaptors are usually HIGH cost, could reach thousands of dollars.
• CAN adaptors are much more cheaper 10$

12. SECURITY
• No JTAG connector in the ECU.
• Communication with the bootloader is always authentication protected.
• Key/Seed protected

13. ACCESSIBILITY

14. REFERENCES
• https://www.iso.org/home.html

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