串口接收不定长数据的几种方式(二)(空闲中断使用)

https://blog.csdn.net/main_h_/article/details/77936623
https://blog.csdn.net/main_h_/article/details/55668953
定时器判断一帧结束
https://blog.csdn.net/Damon_Sandy/article/details/84998144

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