SPARTAN-3AN怎么使用标准JTAG命令读取Block RAM内容

在设计运行时通过JTAG读回BRAM可能会破坏BRAM内容。
您需要通过发出SHUTDOWN命令来停止设计，在读回期间禁用对BRAM的读写操作。
UG332中有一个JTAG回读程序 -
http://www.xilinx.com/support/documentation/user_guides/ug332.pdf
要专门回读BRAM，您需要将FAR设置为特定的BRAM loaction。
iMPACT不提供此功能，因此您需要开发自己的JTAG控制器或自定义SVF文件来执行此操作。
这不是调试设计的好方法。
我强烈建议您使用我们的调试工具（如ChipScope）进行系统调试或使用Simulation来调试您的设计。
通过JTAG回读BRAM将有很多努力来获得有限的回报。
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以下为原文

Reading back BRAM over JTAG while your design is running will potentially corrupt the BRAM content. You would need to stop the design either by issuing a SHUTDOWN command OR disabling read and writes to your BRAM during readback. There is a JTAG readback procedure in UG332 -
http://www.xilinx.com/support/documentation/user_guides/ug332.pdf
 
To specifically read back BRAM you would need to set the FAR to the specific BRAM loaction. iMPACT does not provide this capability so you would need to develop your own JTAG contoller or customize an SVF file to do this.
 
This is not a good route to debug your design. I would STONGLY recommend that you use our debug tools such as ChipScope for in system debug or Simulation to debug your design. Reading back BRAM over JTAG will be alot of effort for limited return.
View solution in original post

在设计运行时通过JTAG读回BRAM可能会破坏BRAM内容。
您需要通过发出SHUTDOWN命令来停止设计，在读回期间禁用对BRAM的读写操作。
UG332中有一个JTAG回读程序 -
http://www.xilinx.com/support/documentation/user_guides/ug332.pdf
要专门回读BRAM，您需要将FAR设置为特定的BRAM loaction。
iMPACT不提供此功能，因此您需要开发自己的JTAG控制器或自定义SVF文件来执行此操作。
这不是调试设计的好方法。
我强烈建议您使用我们的调试工具（如ChipScope）进行系统调试或使用Simulation来调试您的设计。
通过JTAG回读BRAM将有很多努力来获得有限的回报。



以下为原文

Reading back BRAM over JTAG while your design is running will potentially corrupt the BRAM content. You would need to stop the design either by issuing a SHUTDOWN command OR disabling read and writes to your BRAM during readback. There is a JTAG readback procedure in UG332 -
http://www.xilinx.com/support/documentation/user_guides/ug332.pdf
 
To specifically read back BRAM you would need to set the FAR to the specific BRAM loaction. iMPACT does not provide this capability so you would need to develop your own JTAG contoller or customize an SVF file to do this.
 
This is not a good route to debug your design. I would STONGLY recommend that you use our debug tools such as ChipScope for in system debug or Simulation to debug your design. Reading back BRAM over JTAG will be alot of effort for limited return.

谢谢 ！！！



以下为原文

Thanks !!!