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请问OpenMV的串口发送是否使用了DMA发送，还是没有用DMA直接使用芯CPU处理数据？ 目前打开串口发送后会掉帧严重。
如果涉及代码，需要报错提示与全部代码文本，请注意不要贴代码图片
请提供代码，固件版本，硬件版本。我才能测试。