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  1. Thank you, gmv. It certainly helped! (Oh, Alex, I double checked to make sure I'd uncommented the whole line.) Now, the statements in the .xdc file after editing the I/O Std column are exactly the same as what I have previously put in! Anyway, now I am able to generate the bitstream and program the device. Thanks a lot!
  2. I got the following error when I tried the Generate Bitstream step. ERROR: [Drc 23-20] Rule violation (NSTD-1) Unspecified I/O Standard - 1 out of 6 logical ports use I/O standard (IOSTANDARD) value 'DEFAULT', instead of a user assigned specific value. This may cause I/O contention or incompatibility with the board power or connectivity affecting performance, signal integrity or in extreme cases cause damage to the device or the components to which it is connected. To correct this violation, specify all I/O standards. This design will fail to generate a bitstream unless all logical ports h
  3. Hi, I am trying to learn to use the Basys3 board. Varun’s YouTube video on Intro to Vivado was quite helpful. I followed the directions given by Varun with the files downloaded, but when I tried to generate bitstream (after successfully obtaining synthesized design and editing device properties), I get Bitstream Generation Failed message.