The controller is used to generate control signals for the data path, and also control the entire process based on the flag signals from the data path and the signals from the user. The module head of an implementation of the controller is given below.

module sqrt_controller (start, finish, clk, clear, ready, load_data,

incr_delta, find_next_sq

);

input start, finish, clk, clear;

output reg ready, load_data,incr_delta, find_next_sq;

parameter S0=0, S1=1, S2=2, S3=3;

reg [1:0] state, next_state;

Here, the start signal is implement by a push-button to start the sqrt computation process. Signal clear implemented by a switch is used to reset all registers. Signal ready is used to let the user know that the sqrt generator is ready for use.

What would be the state diagram for the controller