Fab1612

Hi everyone, I am new to FPGAs and for a project, I need to use a CMOD A7 board to generate a PWM signal with a user-defined duty cycle. I can easily realize this function for a given duty cycle via a verilog code. However, as soon as I have to change the duty cycle, I have to restart the whole configuration of the board. In order to make the application more reactive, I would like the card to adapt itself according to a duty cycle sent by the user via a terminal on a PC host and a USB connection. I saw that it was possible to use the IP microblaze to send the sentence "Hello World!" on the terminal of the PC but I have difficulties to find concrete information or examples to make the FPGA board really control via the host computer. Do you know if what I'm trying to do is really possible and if so, do you have any clues to give me. Thanks in advance