Guys , there are two supplies of 3.3 V and 1.8 V coming into user wrapper file. So, i am using 1.8V standard cells inside my own user project, So i want to ask what is the signal goes out on GPIOs is it the same 1.8 V or 3.3V by some level shifter ? just want to ask if i am on right path for my user project?

The digital control for the gpio is core voltage, 1.8V

Thanks, so i need to connect only 1.8V supply inside my user project RTL (user_project_wrapper) ? also i want to ask, that at pinout of caravel is it 1.8V as logic 1 and 0V as logic 0 or there is a level shifter of 3.3 or 5Vfor logic 1?