SBUS/UART Framing Error

[MFäh.1]

Hi everyone,

I'm working on decoding an SBUS signal, which uses an inverted normal UART protocol, supposedly at 100 kBd. However, I'm consistently encountering a HAL_ErrorCode 4 (which I believe indicates a framing error). The setup works fine when the MCU isn't too busy and when the interrupt size is set to 1. But under higher loads, the error occurs frequently.

I've tried various configurations to resolve this issue, but nothing seems to help. Does anyone have any suggestions or ideas on how to address this?

Thank you in advance!