The document discusses bootloaders, including their types, functionality, and how they relate to ECU memory mapping. It explains that primary bootloaders are small and run directly from flash to perform hardware checks and load the secondary bootloader into RAM. Secondary bootloaders are larger and can perform tasks like flashing new applications and running diagnostics. The interrupt vector table maps hardware interrupts, software traps, and exception handling to interrupt service routines.

1. Bootloader
BASICS
MEDHAT HUSSAIN

2. Agenda
 ECU Memory Distribution/maping
 Bootloader types
 Bootloader functionality

3. ECU Flash memory Distribution
 Interrupt vector table (IVT)
 Secondary Bootloader
 Functional test
 Main functionality
Bootloader
Functional Test
Main
Functionality
IVT

4. Interrupt vector table (IVT)
 Hardware interrupts
 Software Traps
 Exception handling
&ISR0
&ISR1
&ISR2
&ISR3
…
IVT

5. Bootloader types
Primary (Boot Strap)
Secondary

6. Bootloader Types
Primary
 Runs directly from the HW.
 Executes: From the Flash.
 Size: Small.
secondary
 Runs after the Primary Bootloader.
 Executes: From the RAM
 Size: Bigger

7. Bootloader Functionality
Primary
 Hardware checks
 Transfer the control to the relevant
running mode.
 Loading the secondary bootloader to the
RAM.
secondary
 Flashing new application.
 Diagnostics.

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