Overview of the Bootloader and its basic functionality

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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