xdc-plugin: Setting DRIVE property breaks output

[hannesha]

Setting the drive property in xdc file results in pin not being driven at all.

The cause is that the plugin sets the parameter to a string constant, while yosys expects an integer constant.

I already prepared a quick fix for this. However further work is required to detect this in the techmap files and provide sensible warnings/fallback.

[lgl1227]

I meeting this question, too.How to fix for this, please?

[hannesha]

I have the fixes in the following branch: https://github.com/hannesha/yosys-f4pga-plugins/tree/fix_xdc_drive

It also adds the PULLTYPE property and is able to ignore undefined module ports.

[lgl1227]

thanks