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c6670网口GE例程dsp to pc发包问题

自己做的板子,初始化也都正常,描述符也能够正常从队列里pop出并填好数据,但执行push描述符入发送队列无效,打印出timeout,STATA寄存器的rx包的数目为0,请问可能是什么问题。ps.能从pc端接收数据包。