DP83848K

，上电后LED_SPEED常亮，说明

DP83848k

工作在100Mbps的条件下，TX_CLK,RX_CLK引脚均为25Mhz。速率自协商，程序返回速率标志只有10M,请帮忙分析一下可能的原因？谢谢！


if((phyreg & PHY_SPEED_STATUS) == PHY_SPEED_STATUS)
{  
    /* Set Ethernet speed to 10M following the auto-negotiation */
    (heth->Init).Speed = ETH_SPEED_10M;
}
else
{   

      /* Set Ethernet speed to 100M following the auto-negotiation */
      (heth->Init).Speed = ETH_SPEED_100M;
}

上述返回(heth->Init).Speed = ETH_SPEED_10M;

检查一下硬件，看看发送和接收是不是各接了4条线呢