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无符号数255 = 1111 1111255*255 = 1111111000000001这表明，8位无符号数字相乘的结果是16位无符号数字

FPGA vivado中报错，无法烧录bit[Labtools 27-3303] Incorrect bitstream assigned to device. Bitfile is incompatible for this device.原因是板卡型号不对，在Setting中选择新的板卡型号，是否改变sys,可以选择否，重新生成Bit即可。...

Xilinx问题解决-Arty A7[Timing 38-282] The design failed to meet the timing requirements.[Timing 38-469] The REFCLK pin of IDELAYCTRL Sytem_i/mig_7series_0/u_Sytem_mig_7series_0_0_mig/u_iod[Timing 38-282]...