2020-11-11 06:50 PM
When the USART is hot swapping,some datas will occur on TX RX pin;and the value of BRR register will be changed;the picture 1 shows the BRR before hot swapping;and the picture 2 shows the BRR after hot swapping.
Why this question happens?And what can I do to avoid this quetion?
2020-11-11 07:19 PM
> When the USART is hot swapping
What do you mean by this? What is being hot swapped?
Pictures don't come through if you just paste them. You need to upload them with the "Image" icon tool.
2020-11-11 07:32 PM
this is picture1this is picture 2
The USART of STM32 is connected to another terminal with a network cable;when plugging the cable,some Interference datas like"FF"will occur on the RX pin of STM32 ;then the value of BRR will be change 。