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AM5716: UART Issue

Part Number: AM5716

Hi experts

Recently, we encountered that the RS485 of the AM5716 issue, when we use the close function when sending and receiving data and when it is opened again, the RS485 port cannot be used. It can be used if it is closed when not sending or receiving data.

We are using Linux, and the kernel version is 4.19.

I'd appreciate if you can give some comments.