GTP实现的多个驱动程序错误

嗨，
我正在使用sp605板用于GTP应用程序。
在设计时序约束设置期间，工具报告错误消息如下：
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检查扩展设计...错误：NgdBuild：455  - 逻辑网络'GTP_CLK_OUT'有多个驱动程序：块GTP_CORE_inst / tile0_gtp_core_wimax_i / gtpa1_dual_i上的引脚GTPCLKOUT1，类型为GTPA1_DUAL，引脚PAD上的块GTP_CLK_OUT，类型为PAD
分区实施状态-------------------------------
在此设计中未找到分区。
-------------------------------
NGDBUILD设计结果摘要：错误数：1警告数：0
NGDBUILD完成的总实际时间：2秒到NGDBUILD完成的总CPU时间：2秒
在NGDBUILD期间发现了一个或多个错误。
不会写入NGD文件。
编写NGDBUILD日志文件“GTP_top.bld”...
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该错误显示多个驱动程序，这是由GTP IP内核向导创建的。
我追溯到源，但信号线只有一个输出驱动器。
唯一的可能性是参考时钟信号也被馈入电线但在向导中不使用。
我不知道我能对代码做些什么，如果有人有相同的经验那么请给我一些暗示。
谢谢。



以下为原文

Hi,

I am using sp605 board for GTP applications. During the design timing constraint setup, the tool report error message as below:

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Checking expanded design ...
ERROR:NgdBuild:455 - logical net 'GTP_CLK_OUT<0>' has multiple driver(s):
     pin GTPCLKOUT1<0> on block
   GTP_CORE_inst/tile0_gtp_core_wimax_i/gtpa1_dual_i with type GTPA1_DUAL,
     pin PAD on block GTP_CLK_OUT<0> with type PAD
Partition Implementation Status
-------------------------------
  No Partitions were found in this design.
-------------------------------
NGDBUILD Design Results Summary:
  Number of errors:     1
  Number of warnings:   0
Total REAL time to NGDBUILD completion:  2 sec
Total CPU time to NGDBUILD completion:   2 sec
One or more errors were found during NGDBUILD.  No NGD file will be written.
Writing NGDBUILD log file "GTP_top.bld"...

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The error shows a multiple driver and this is created by the GTP IP core wizard. I traced back to the souce but there is only one output driver for the signal wire.

The only possibility is that the reference clock signal is also fed into the wire but it is not used in the wizard.

I am not sure what I can do about the codes and if anyone has the same experience then please give me some hint about it.

Thank you.