# 硬件错误记录

RX没有接上拉电阻导致，RX电平处于未知状态，会产生一定的波形造成接收帧错误中断的触发

![image-20220307140315279](C:%5CUsers%5Cadmin%5CAppData%5CRoaming%5CTypora%5Ctypora-user-images%5Cimage-20220307140315279.png)