Page 204 - MDP2020-2

| 인천전자마이스터고등학교 ·············································································································
198

if(clk_cnt >= 62500 && clk_cnt <= 187500) //125000 + 62500
begin
lcd_en <= 1'b1;
end
else
begin
lcd_en <= 1'b0;
end
end
end
end

//FSM(next_state_logic + state_logic)
always @(posedge clk, negedge rst)
begin
if(!rst)
begin
state <= delay_100ms;
end
else
begin
if(clk_cnt == 0)
begin
case(state)
delay_100ms : state <= (cnt_100ms == 19)? function_set : state;
function_set : state <= display_on;

display_on : state <= display_clear;
display_clear : state <= entry_mode;
entry_mode : state <= display_data;
display_data : state <= (cnt_line >= 34)? delay_20ms : state;
delay_20ms : state <= (cnt_20ms == 3)? display_data : state;
endcase
end
end
end

//FSM(output_logic)
always @(posedge clk, negedge rst)
begin
if(!rst)
begin
lcd_rs <= 0;
lcd_data <= 0;
end
else