有关modelsim问题汇总.doc

问题一：编译xilinx仿真库 在网上搜了无数帖子，结合自己数小时的实践，终于搞定了Xilinx仿真库。 测试环境：Windows XP3，Xilinx ISE Suite 10.1，ModelSim SE 6.5c 使用ISE自带的库生成工具是最方便的方法。 首先打开ISE，在Edit-Preferences...-ISE General 的 Intergrated Tools 的 Model Tech Simulator中指定Modelsim.exe的实际安装路径。（在这里我的路径是D:\Work\modeltech_6.5c\win32\modelsim.exe，请根据自己的实际情况更改）。OK以后退出ISE。 然后到ModelSim安装目录下找到ModelSim.ini文件，右键将其只读属性去掉，确定。 按下WIN+R，输入compxlibgui后回车，这其实就是自带的工具Simulation Library Compilation Wizard。点击Select simulator，选中ModelSim。检查路径正确了以后选Next。再Next，建议再Next，或者根据自己的实际需要选择FPGA/CPLD的具体型号。继续Next，在Map only to existing pre-compiled libraries前打上勾，在Output Directory for modelsim.ini file using mapped libraries中选择modelsim安装根目录modelsim.ini所在的路径，这一步很重要。再点击Next就开始编译了。 最后把ModelSim.ini文件的只读属性改回去，万事OK…… 问题二： Hello all, Whenever I need to look at a filter output (or any DSP core), I used to define a real signal and assign it to what I want to examine, roughly something like this: dac_real_out = hex2real(dac_holder, 12.0); where dac_holder is a std_logic_vector. It is much easier to look at an analogue signal waveform instead of tracing hex values word by word. This used to work quite alright using ModelSim XE edition. Now for some reason, it seems I cant get it to compile my design---I get the following error: # ** Error: (vcom-42) Unsupported ModelSim library format for work. (Format: 3) My first question is: can I go around it as Ive never encountered this before. My second one is: if not, is there anyway I can make ISE simulator do the same thing? apparently I cant add this real signal to my waveform editor and presumably ISE doesnt support it. Would appreciate any input on this. Manny wrote: This used to work quite alright using ModelSim XE edition. Now for some reason, it seems I cant get it to compile my design---I get the following error: # ** Error: (vcom-42) Unsupported ModelSim library format for work. (Format: 3) You cant *elaborate* (vsim) your design because the compiled work directory does not match the simulator you are u