Hello, I need to receive, from usart, a non kown amount of data, is there any implementation of DMA ring buffer for HAL library and stm32f407? Thank you.

[waclawek.jan]

https://github.com/MaJerle/STM32_USART_DMA

Author is ST FAE.

JW

[e^iPI + 1 = 0]

Ok but I saw that it runs on LL driver library, is there any other option?

[Tesla DeLorean]

Not sure why LL/HAL should matter, somewhat of a moving target as to how ST might evolve things.

Better perhaps just to understand how the underlying hardware works, and localize the device specific code as tightly as possible.

A lot of the HAL code is unnecessarily large and convoluted.