原创 quartusII中 dcfifo ram rom调用问题

Error: M4K memory block WYSIWYG primitive "RAM1:inst2|altsyncram:altsyncram_component|altsyncram_bqc1:auto_generated|altsyncram_4oe2:altsyncram1|ram_block3a0" utilizes the dual-port dual-clock mode. However, this mode is not supported in Cyclone II device family in this version of Quartus II software. Please refer to the Cyclone II FPGA Family Errata Sheet for more information on this feature

错误分析：

估计是因为在Quartus新版本中认为这个LPM_RAM_DQ模块不适合Cyclone II？所以直接以ERROR的方式提示出来了。

解决方法：

打开工程设置，定位到选项卡左侧的“ASSIGNMENTS | SETTING | ANALYSIS&SYNHESIS”页；
然后在默认参数设置（SETTINGS_DEFAULT PATAMETERS）中添加一个名（NAME）为 CYCLONEII_SAFE_WRITE、值（DEFAULT SETTING）为VERIFIED_SAFE的参数；
然后点击“ADD”，按“OK”确认。