See Application note AN4657, STM32 in-application programming (IAP) using the USART:
https://www.st.com/resource/en/application_note/an4657-stm32-inapplication-programming-iap-using-the-usart-stmicroelectronics.pdf
@RainNu wrote:
The file I need to burn is in HEX format, but I haven't been able to find any relevant sample code on the internet. Most of the materials only provide implementation schemes for burning BIN files.
There's a good reason for that: fully handling all the possible variations & options of the Intel HEX format is very much a non-trivial exercise - forums are littered with incomplete or simplistic implementations which fall over with any deviation from their own very limited interpretation of the format.
Also, Intel Hex format is quite inefficient.
So, often, a BIN is a better choice.
Having said that, Intel Hex is long-established, well-documented and widely-used - you should certainly be able to find something to interpret it.
Or work from scratch:
https://en.wikipedia.org/wiki/Intel_HEX
https://developer.arm.com/documentation/ka003292/latest/
The Intel Hex interpretation is entirely separate from the STM32 IAP stuff ...
A complex system that works is invariably found to have evolved from a simple system that worked.
A complex system designed from scratch never works and cannot be patched up to make it work.
