How to Transfer Audio file (.AMR) from One USART to Another USART in STM32F030C8T6

Sn.17 · ‎2021-01-22

Tesla DeLorean · ‎2021-01-22

A byte at a time?

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Andrew Neil · ‎2021-01-22

As far as the USARTs are concerned, they neither know nor care anything about "files" or "audio": all they do is send and receive bytes - as @Community member suggests.

So is your question:

How to send and receive bytes using the STM32F030 USART?
How to send a file over an async serial link?

For the latter, I'd suggest you look at something like XModem or YModem.

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A complex system designed from scratch never works and cannot be patched up to make it work.