为什我下载后不能使用!那位大侠能救救啊?vivado 提示没有license 我用的vivado 2012.2
[Common 17-308] A valid license was not found for feature 'Synthesis' targeting device 'xc7vx485t'. Please run the Xilinx License Configuration Manager
for assistance in determining which features and devices are licensed for your system.