怎么知道FPGA上剩余的电路板使用量和可用空间量

这与“电路板使用”无关。
如果您不知道来自IC的电路板......您使用62％的寄存器，67％的LUT，90％的RAM，26％的DSP，而不是其他。
因此，BlockRAM的使用对你来说非常重要。如果不了解你正在使用的家庭，就不能说更多。
------------------------------------------“如果它不起作用
模拟，它不会在板上工作。“



以下为原文

This is NOTHING to do with "board usage". If you don't know a board from an IC...

You are using 62% of the registers, 67% of the LUTs, 90% of the RAM, 26% of the DSPs, and not much else. BlockRAM usage is therefore the important figure for you.

Can't say much more without knowing wahat family you are using.

------------------------------------------
"If it don't work in simulation, it won't work on the board."

我使用的FPGA是Xilinx Virtex5 XC5VSX50T。



以下为原文

The FPGA I am using is Xilinx Virtex5 XC5VSX50T.

虽然Block RAM的百分比最高，但使用100％的Block RAM是完全合理的
资源（鉴于您不希望扩展设计）。
然而，使用100％是非常困难的
结构LUT或寄存器没有遇到问题。
如你所见，虽然规模较大
两者中只有67％，你至少部分使用92％的切片。
当你开始添加更多
逻辑上，更多的切片将被充分利用，因此更多的切片将具有一些不相关的切片
逻辑挤在一起。
这最终会使布局和布线非常困难，尤其是如果
你需要满足激进的时间限制。
大型Virtex 5中67％的LUT或触发器
可能是开始考虑划分设计的好地方。
请注意，在较小的
FPGA，这个百分比可能更大，因为你没有那么大的可能路由
较小面料的距离。
非常低密度的FPGA可以使用非常接近100％。
Virtex 5 SX50T可能在70-75％LUT或寄存器之间
在你需要花费大量时间进行时序收敛之前。
-  Gabor
-  Gabor



以下为原文

While block RAM is the highest percentage, it is perfectly reasonable to use 100% of block RAM
resources (given you don't expect to expand the design).  However it is very hard to use 100% of
the fabric LUTs or registers without running into problems.  As you can see, although the larger
of the two is only 67%, you are at least partially using 92% of the slices.  As you start to add more
logic, more of the slices will be fully utilized, and more slices will thus have some unrelated
logic packed together.  This eventually makes placement and routing very hard, especially if
you need to meet aggressive timing constraints.  67% of LUTs or flip-flops in a large Virtex 5
is probably a good place to start thinking about partitioning the design.  Note that in a smaller
FPGA, this percentage may be larger because you don't have as large a possible routing
distance in a smaller fabric.  Very low density FPGA's can be used very close to 100%.
 
The Virtex 5 SX50T is probably good up to somewhere between 70-75% LUTs or registers
before you need to spend a lot of time on timing closure.
 
-- Gabor
-- Gabor