52840 At 1Mbps, UART will lose data

[can23]

At 1Mbps, UART will lose data when receiving. When I set it to 230400bps, it works well. I looked at the SDK code and found that too much time was spent in the receiving code, resulting in data loss. Can you provide the code of UART register directly without using SDK library?

[run_ar]

Hi,

You need to enable Hardware flow control so that uart is halted if the cpu isn't able to service it fast enough.

[can23]

There are too many codes processed in the interrupt. I think as long as there is data and the interrupt can read the data from the receiving register, and then the processing can be handed over to the user, unlike SDK, which is not a good code

[run_ar]

I might depend on which uart driver you are using. Have you looked at Libuarte - advanced UARTE driver?