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UDP接收数据问题



我使用C6748做udp开发,使用上位机循环给dsp发送数据,dsp接收数据之后会进入断函数

 IntRegister(C674X_MASK_INT4, EMACCore0RxIsr);////中断函数设置

 IntEventMap(C674X_MASK_INT4, SYS_INT_EMAC_C0RX);

static void EMACCore0RxIsr(void)  ////中断函数定义
{
IntEventClear(SYS_INT_EMAC_C0RX);

lwIPRxIntHandler(0);
}

但是正常接收96帧之后,dsp就不进入中断,不知道是为什么?