如何使用光纤的2 spartan605评估板之间的通信偏差问题

你好，
当我使用光纤测试2 spartan605评估板之间的通信时，我遇到了一些问题。
使用Core Generator，我配置了Aurora 8B / 10B v8.3，线速率为2.5Gbps，参考时钟为125MHz。
参考时钟由125 MHz板载振荡器产生。（由25MHz板载振荡器倍增）
然后我将example_design下载到spartan 605.每个Spartan605在传输和接收时都是“channel_uped和lane_uped”。但是当我把光纤放在它们之间并想要通信时，我丢失了channel_up和lane_up.And使用
chipcope，我可以获得“channel_up”和“lane_up”始终为零。
我猜是问题是两个参考时钟有偏差还是其他一些原因。
你能帮助我并给我一些建议吗？
谢谢 ！



以下为原文

Hello,

I have caught with some problems when I test the communication between 2 spartan605 evaluation board using fiber.

Using Core Generator,I have config  Aurora 8B/10B v8.3 with the line rate 2.5Gbps and the reference clock 125MHz.

The reference clock is generated by the 125 MHz onboard crystal oscillator.(Multipled by the 25MHz onboard crystal oscillator )

And then I download the example_design to the spartan 605. Each Spartan605 is "channel_uped and lane_uped"when transmited and received by itself.But when I put the fiber between them and want to communicate , I have lost the channel_up and the lane_up.And using chipscope, I could get the "channel_up" and "lane_up" is always zero.

I guess whether the problem is       the two reference clocks have deviation or  some other reason.

Could you help me and give me some suggestion?

Thank you !