Bootloading

2022-08-01 Notes on bootloaders for microcontrollers

A starting point, which links to five articles on differing bootloading approaches:

• https://interrupt.memfault.com/tag/zero-to-main/

13 Aug 2019 by François Baldassari
• https://interrupt.memfault.com/blog/how-to-write-a-bootloader-from-scratch

2022-08-03

What is a serial bootloader and how is it used?

Following link gives Silabs example, but is not a good general explanation:

• https://community.silabs.com/s/article/what-is-serial-bootloader-and-how-to-use-it-x?language=en_US
• https://www.silabs.com/documents/public/application-notes/AN1011-efm32-standalone-programmer.pdf

Atmel bootloader:

• https://ww1.microchip.com/downloads/en/Appnotes/Atmel-8390-WIRELESS-AVR2054-Serial-Bootloader-User-Guide_Application-Note.pdf

STMicro bootloader:

• https://www.st.com/resource/en/application_note/an3155-usart-protocol-used-in-the-stm32-bootloader-stmicroelectronics.pdf

RP2040 bootloaders:

• https://blog.usedbytes.com/2021/12/pico-serial-bootloader/ RP2040 bootloader by Brian Starkey

• https://github.com/usedbytes/rp2040-serial-bootloader . . . bootloader by 'usedbytes'
• https://github.com/rhulme/pico-flashloader . . . bootloader by rhulme, small at less than 4kb
• https://github.com/dwelch67/raspberrypi-pico/tree/main/bootloader10 . . . bootloader by dwelch67