一、底部信息信息显示窗口关闭
使用快捷键 alt+3打开信息显示窗口
二、
Error (169085): promoted from Critical Warning: No exact pin location assignment(s) for 49 pins of 49 total pins. For the list of pins please refer to the I/O Assignment Warnings table in the fitter report.
Error (332012): promoted from Critical Warning: Synopsys Design Constraints File file not found: ‘frequency_dff24.sdc’. A Synopsys Design Constraints File is required by the Timing Analyzer to get proper timing constraints. Without it, the Compiler will not properly optimize the design.
Error (171000): Can’t fit design in device
解决