问题一：测试C6678网口和上位机通信时，接上网线后，网口的LED灯不亮，上位机上的网络连接显示×，运行pdk_c6678_1_1_2_6//packages里的platform_test例程，发现程序卡在如下代码红色部分：
if (macPortNum == 1) {
/* Hold the port in soft reset and set up
* the SGMII control register:
* (1) Disable Master Mode
* (2) Enable Auto-negotiation
*/
CSL_SGMII_startRxTxSoftReset (macPortNum);
CSL_SGMII_disableMasterMode (macPortNum);
CSL_SGMII_enableAutoNegotiation (macPortNum);
CSL_SGMII_endRxTxSoftReset (macPortNum);
/* Setup the Advertised Ability register for this port:
* (1) Enable Full duplex mode
* (2) Enable Auto Negotiation
* (3) Enable the Link
*/
sgmiiCfg.linkSpeed = CSL_SGMII_1000_MBPS;
sgmiiCfg.duplexMode = CSL_SGMII_FULL_DUPLEX;
CSL_SGMII_setAdvAbility (macPortNum, &sgmiiCfg);
do
{
CSL_SGMII_getStatus(macPortNum, &sgmiiStatus);
} while (sgmiiStatus.bIsLinkUp != 1);
/* Wait for SGMII Autonegotiation to complete without error */
do
{
CSL_SGMII_getStatus(macPortNum, &sgmiiStatus);
if (sgmiiStatus.bIsAutoNegError != 0)
return; /* This is an error condition */
} while (sgmiiStatus.bIsAutoNegComplete != 1);
}
问题二：网口通信设置的流程是怎样的呢，硬件和软件上要做哪些设置啊，我看有的帖子回答说和fpga上电的时序也有关系，fpga上电时序是怎样的才能保证网口测试通过呢？还有MDIO、phy芯片这些要不要设置？
谢谢解答；
