Enroll for the full course : https://bit.ly/3d2t581
In this video you’ll learn writing MCU startup file , vector table placement using GCC section placement attribute and writing weak default handlers for all the system exceptions and interrupts of the MCU

Source files : https://github.com/niekiran/baremetalembedded
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In this lesson you will learn about the standard startup code that gets linked with your application from the IAR library. You will see how the startup code initializes the various data sections and you will see these sections in the linker map file. Finally, you’ll go back all the way to the beginning of the reset sequence, where you will encounter the vector table.

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Course web-page:
https://www.state-machine.com/quickstart

YouTube playlist of the course: