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TMS320C6678与PC机的PCIE通信问题

Other Parts Discussed in Thread: TMS320C6678

1,TMS320C6678开发板先上电,运行PCIe初始化程序时,发现在时钟锁定时(wait  pll lock),一直循环等待,跳不过去,查询手册看到是对一个只读寄存器的循环查询,显示时钟一直没有被lock,请问,可以断定是输入的PCIE时钟有问题吗?

2,TMS320C6678有两路PCIE,为什么我没有找到寄存器来去选择使用其中哪一路?这个是硬件连接好,就自动识别的吗?

敬请回复呀