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TM4C1294NCPDT在连接以太网时卡死



lwIPInit(g_ui32SysClock, pui8MACArray, 0xC0A80011, 0xFFFFFF00, 0xC0A80001, IPADDR_USE_STATIC);

程序运行在这一步卡住,进入调试模式,在lwIPInit()函数内发现程序卡在循环内

while(!SysCtlPeripheralReady(SYSCTL_PERIPH_EMAC0))
{
}

请问这是什么情况,是芯片坏了吗