无法在BRAM中安装FSM（FSM_STYLE）

bbinb写道：
感谢你的回答。
我之所以希望将BRAM用于状态机实现，是因为在Xilinx培训视频中建议，如果设备中的逻辑资源不足，则尝试使用状态机的BRAM来为额外的逻辑资源腾出空间。
说实话，我从来没有将BRAM实现用于状态机。
（它带来了使用EPROM和PAL作为计数器来实现状态机的不良记忆。）我认为基于BRAM的实现是否更高效取决于设计。
因此，我认为在看到这些结果后，将BRAM用于状态机并不是一个好主意。
我的意思是在我的代码中使用一个简单的状态机2使用BRAM。
国家机器由50多个州组成！
或者HDL编码应该使用较少的BRAM用于状态机。
我认为你应该以一种使其可维护的方式对状态机进行编码，并且如果资源不足或者你没有达到时间安排就会担心优化问题。
----------------------------是的，我这样做是为了谋生。
在原帖中查看解决方案



以下为原文

bbinb wrote:
Thanks for the answer. The reason I wanted to use BRAM for state machine implementation, because it is suggested in one of Xilinx training videos that trying utilizing BRAMs for state machines in order to make room for extra logic resources if the logic resources are not enough in the device.

to be honest, I've never used the BRAM implementation for state machines. (It brings back bad memories of using an EPROM and a PAL for a counter to implement state machines.) I suppose that whether the BRAM-based implementation is more efficient is dependent on the design.

So I think utilizing BRAM for state machine is not a good idea after seeing these results. I mean for a simple state machine in my code 2 BRAM is utilized. What about state machines consist of more than 50 states ! Or the HDL coding should be in a way that it utilizes less BRAM for state machines.

I suppose that you should code the state machine in a way that makes it maintainable, and worry about optimization if you run out of resources or you don't meet timing.
----------------------------Yes, I do this for a living.View solution in original post

你好@ bbinb，
您可以尝试使用-use_new_parser设置为yes运行综合。
你需要编写-use_new_parser yesIn综合过程属性：
--Syed
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以下为原文

Hello @bbinb,
 
Can you try running synthesis with -use_new_parser set to yes. 
 
You need to write -use_new_parser  yes In Synthesis process properties:

 
--Syed
 
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嗨@ bbinb，
检查您的FSM是否使用异步复位，如果FSM具有异步复位，则无法使用Block RAM实现。
有关ISE中FSM编码样式的更多信息/示例，请参阅以下用户指南
http://www.xilinx.com/support/documentation/sw_manuals/xilinx14_7/xst.pdf
--Syed
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--------------------------------------------请注意 - 请注明
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以下为原文

Hi @bbinb,
 
Check if your FSM is using asynchronous reset as if FSM has an asynchronous reset, it cannot be implemented using block RAM. 
 
You can refer to following user guide for more information/example FSM coding styles in ISE
http://www.xilinx.com/support/documentation/sw_manuals/xilinx14_7/xst.pdf
 
--Syed
 
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嗨Syed，
我试过你说的但你的建议不起作用。



以下为原文

Hi Syed,
 
I tried what you said but your suggestion did not work.