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moduledisplay_control(clk,clk_1Hz,reset,key,sw,state,hour,min,temh,teml,humh,huml,en,led_time); input clk,clk_1Hz; input reset; input [3:0] key; input sw; output [3:0] state; output [7:0] hour,min; output [7:0] temh,teml; output [7:0] humh,huml; output en; output led_time; reg [3:0] state; reg [7:0] hour,min; reg [7:0] temh,teml; reg [7:0] humh,huml; reg en; reg led_time; reg clk_min; reg [7:0] clk_cnt; parameter rst_hour = 8’H01; parameter rst_min = 8’H00; parameter rst_temh = 8’H25; parameter rst_teml = 8’H20; parameter rst_humh = 8’H65; parameter rst_huml = 8’H55; always @(posedge clk_1Hz or posedgereset) if(reset) clk_cnt <= 0; else if(sw) if(clk_cnt < 29) clk_cnt <=clk_cnt + 1; else begin clk_cnt <= 0; clk_min <=~clk_min; end always @(posedge key[3] or posedge key[2]or posedge reset) if(reset) state <= 0; else if(key[3]) state <= 0; else if(key[2]) if(state <= 12) state <= state +1; else state <= 0; always @(posedge clk_min or posedgekey[1] or posedge key[0] or negedge sw or posedge reset) if(reset) begin hour <= rst_hour; min <= rst_min; en <= 1; end else if(!sw) begin en <= 1; led_time <= 0; if(key[1]) case(state) 10: if(min[3:0] == 9) min[3:0]<= 0; elsemin[3:0] <= min[3:0]+1; 11: if(min[7:4] == 9) min[7:4]<= 0; elsemin[7:4] <= min[7:4]+1; 12: if(hour[3:0] == 9) hour[3:0]<= 0; elsehour[3:0] <= hour[3:0]+1; 13: if(hour[7:4] == 9) hour[7:4]<= 0; elsehour[7:4] <= hour[7:4]+1; default: ; endcase else if(key[0]) case(state) 10: if(min[3:0] == 0) min[3:0]<= 9; elsemin[3:0] <= min[3:0]-1; 11: if(min[7:4] == 0) min[7:4]<= 9; elsemin[7:4] <= min[7:4]-1; 12: if(hour[3:0] == 0) hour[3:0]<= 9; elsehour[3:0] <= hour[3:0]-1; 13: if(hour[7:4] == 0) hour[7:4]<= 9; elsehour[7:4] <= hour[7:4]-1; default: ; endcase end else if(clk_min) begin led_time <= clk_1Hz; if(min[3:0] == 0) if(min[7:4] == 0) if(hour[3:0]== 0) if(hour[7:4]== 0) begin hour<= rst_hour; min<= rst_min; en<= 0; end else begin hour[7:4]<= hour[7:4]-1; hour[3:0]<= 9; min[7:4]<= 5; min[3:0]<= 9; end else begin hour[3:0]<= hour[3:0]-1; min[7:4]<= 5; min[3:0]<= 9; end else begin min[7:4]<= min[7:4]-1; min[3:0]<= 9; end else min[3:0] <=min[3:0]-1; end always @(posedge key[1] or posedge key[0]or posedge reset) if(reset) begin temh <= rst_temh; teml <= rst_teml; end else if(key[1]) case(state) 6: if(teml[3:0] == 9) teml[3:0] <= 0; elseteml[3:0] <= teml[3:0]+1; 7: if(teml[7:4] == 9) teml[7:4] <= 0; elseteml[7:4] <= teml[7:4]+1; 8: if(temh[3:0] == 9) temh[3:0] <= 0; elsetemh[3:0] <= temh[3:0]+1; 9: if(temh[7:4] == 9) temh[7:4] <= 0; elsetemh[7:4] <= temh[7:4]+1; default: ; endcase else if(key[0]) case(state) 6: if(teml[3:0] == 0) teml[3:0] <= 9; elseteml[3:0] <= teml[3:0]-1; 7: if(teml[7:4] == 0) teml[7:4] <= 9; elseteml[7:4] <= teml[7:4]-1; 8: if(temh[3:0] == 0) temh[3:0] <= 9; elsetemh[3:0] <= temh[3:0]-1; 9: if(temh[7:4] == 0) temh[7:4] <= 9; elsetemh[7:4] <= temh[7:4]-1; default: ; endcase always @(posedge key[1] or posedge key[0]or posedge reset) if(reset) begin humh <= rst_humh; huml <= rst_huml; end else if(key[1]) case(state) 2: if(huml[3:0] == 9) huml[3:0] <= 0; elsehuml[3:0] <= huml[3:0]+1; 3: if(huml[7:4] == 9) huml[7:4] <= 0; elsehuml[7:4] <= huml[7:4]+1; 4: if(humh[3:0] == 9) humh[3:0] <= 0; elsehumh[3:0] <= humh[3:0]+1; 5: if(humh[7:4] == 9) humh[7:4] <= 0; elsehumh[7:4] <= humh[7:4]+1; default: ; endcase else if(key[0]) case(state) 2: if(huml[3:0] == 0) huml[3:0] <= 9; elsehuml[3:0] <= huml[3:0]-1; 3: if(huml[7:4] == 0) huml[7:4] <= 9; elsehuml[7:4] <= huml[7:4]-1; 4: if(humh[3:0] == 0) humh[3:0] <= 9; elsehumh[3:0] <= humh[3:0]-1; 5: if(humh[7:4] == 0) humh[7:4] <= 9; elsehumh[7:4] <= humh[7:4]-1; default: ; endcase endmodule | 
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