In reply to rishikpillai90:
You do not specify the timing for the output. My recommendation for you is:
clocking drv @(posedge clk)
default input #1step;
default output #1;
input valid;
output ready;
endclocking
In reply to rishikpillai90:
You do not specify the timing for the output. My recommendation for you is:
clocking drv @(posedge clk)
default input #1step;
default output #1;
input valid;
output ready;
endclocking