Page 195 - MDP2020-2

················································································ 명장양성프로젝트 【MDP】 과제발표회 자료집 Ⅱ | 189

begin
led <= ~led;
end
else
begin
led <= led;
end
end
end
endmodule */

//A -> /A -> B -> /B
module step_motor(clk, rst, step_phase);
input clk, rst;
output reg [3:0] step_phase;

reg [2:0] step;
reg [31:0] time_count;
reg stop_flag;
reg [31:0] temp;

parameter SPEED = 100000;
//parameter SPEED = 10000000;
parameter A = 4'b0001, A_ = 4'b0010, B = 4'b0100, B_ = 4'b1000;

always @(posedge clk, negedge rst)

begin
if(!rst)
begin
time_count <= 0;
end
else
begin
if(time_count >= SPEED)
begin
time_count <= 0;
end
else
begin
time_count <= time_count + 1;
end
end
end

always @(posedge clk, negedge rst)