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目前测试的结果是,无论发送多大的数据,128,512,1024,FPGA端只能收到第一行64字节的数据,比如说,发送一个128字节的数据,FPGA收到第一个64字节的,后面就收不到了,这是什么原因?实际设置情况,由B通道8位数据发送给FPGA,然后FPGA回传给A通道。时序什么的,通过示波器量都没啥问题?