Traffic Light display on VGA

[Altera_Forum]

Hi everyone!

I am planning to make a verilog project on traffic lights similar as found in this video https://www.youtube.com/watch?v=ieBteoMly7w. This is my code but it won't display something on the screen. Somebody help me with this. 

This is my code for it to display on the screen..

always @(posedge clk) 

begin 

if(reset == 1) 

q <= 0; 

else 

q <= q + 1; 

end 

assign clk3 = q[24]; // 3 Hz 

always @(posedge clk3) 

begin 

if (reset == 1) 

begin 

state <= S0; 

count <= 0; 

end 

else 

case(state) 

S0: if(count < SEC5) 

begin 

state <= S0; 

count <= count + 1; 

end 

else 

begin 

state <= S1; 

count <= 0; 

end 

S1: if(count < SEC2) 

begin 

state <= S1; 

count <= count + 1; 

end 

else 

begin 

state <= S2; 

count <= 0; 

end 

S2: if(count < SEC2) 

begin 

state <= S2; 

count <= count + 1; 

end 

else 

begin 

state <= S3; 

count <= 0; 

end

S3: if(count < SEC5) 

begin 

state <= S3; 

count <= count + 1; 

end 

else 

begin 

state <= S4; 

count <= 0; 

end 

S4: if(count < SEC2) 

begin 

state <= S4; 

count <= count + 1; 

end 

else 

begin 

state <= S5; 

count <= 0; 

end 

S5: if(count < SEC2) 

begin 

state <= S5; 

count <= count + 1; 

end 

else 

begin 

state <= S0; 

count <= 0; 

end 

default state <= S0; 

endcase 

end

always @(posedge clk3) 

begin 

case(state) 

S0: begin out <= 4'd5;

if(out != 0) 

begin 

out <= out - 4'd1;

end 

end

S1: begin out <= 4'd2;

if(out != 0) 

begin 

out <= out - 4'd1;

end

end 

S2: begin out <= 4'd2;

if(out != 0) 

begin 

out <= out - 4'd1;

end

end 

S3: begin out <= 4'd5;

if(out != 0) 

begin 

out <= out - 4'd1;

end

end

S4: begin out <= 4'd2;

if(out != 0) 

begin 

out <= out - 4'd1;

end

end

S5: begin out <= 4'd2;

if(out != 0) 

begin 

out <= out - 4'd1;

end

end

default state <= S0; 

endcase 

end

//************************Setting the Blinking of Lights************************//

always @(posedge clk3) 

begin 

case(state)

S0: begin

if(Auto5 || Auto8)

begin 

VGA_R = 3'b000 & inDisplayArea;

VGA_G = 3'b111 & inDisplayArea;

VGA_B = 2'b00 & inDisplayArea; 

end 

else if(Auto9 || Auto12) 

begin 

VGA_R = 3'b111 & inDisplayArea;

VGA_G = 3'b000 & inDisplayArea;

VGA_B = 2'b00 & inDisplayArea; 

end 

else if (Auto1 || Auto2 != Auto3 != Auto4 != Auto5 != Auto6 != Auto7 != Auto8 != Auto9 != Auto10 != Auto11 != Auto12 != Auto13 != Auto14)

begin

VGA_R = 3'b111 & inDisplayArea;

VGA_G = 3'b111 & inDisplayArea;

VGA_B = 2'b11 & inDisplayArea;

end

else

begin

VGA_R = 0 & inDisplayArea;

VGA_G = 0 & inDisplayArea;

VGA_B = 0 & inDisplayArea;

end

end

S1: begin

if(Auto4 || Auto7)

begin 

VGA_R = 3'b111 & inDisplayArea;

VGA_G = 3'b111 & inDisplayArea;

VGA_B = 2'b00 & inDisplayArea; 

end 

else if(Auto9 || Auto12) 

begin 

VGA_R = 3'b111 & inDisplayArea;

VGA_G = 3'b000 & inDisplayArea;

VGA_B = 2'b00 & inDisplayArea; 

end 

else if (Auto1 || Auto2 != Auto3 != Auto4 != Auto5 != Auto6 != Auto7 != Auto8 != Auto9 != Auto10 != Auto11 != Auto12 != Auto13 != Auto14)

begin

VGA_R = 3'b111 & inDisplayArea;

VGA_G = 3'b111 & inDisplayArea;

VGA_B = 2'b11 & inDisplayArea;

end

else

begin

VGA_R = 0 & inDisplayArea;

VGA_G = 0 & inDisplayArea;

VGA_B = 0 & inDisplayArea;

end

end

S2: begin

if(Auto3 || Auto6)

begin 

VGA_R = 3'b111 & inDisplayArea;

VGA_G = 3'b000 & inDisplayArea;

VGA_B = 2'b00 & inDisplayArea;

end 

else if(Auto9 || Auto12) 

begin 

VGA_R = 3'b111 & inDisplayArea;

VGA_G = 3'b000 & inDisplayArea;

VGA_B = 2'b00 & inDisplayArea; 

end 

else if (Auto1 || Auto2 != Auto3 != Auto4 != Auto5 != Auto6 != Auto7 != Auto8 != Auto9 != Auto10 != Auto11 != Auto12 != Auto13 != Auto14)

begin

VGA_R = 3'b111 & inDisplayArea;

VGA_G = 3'b111 & inDisplayArea;

VGA_B = 2'b11 & inDisplayArea;

end

else

begin

VGA_R = 0 & inDisplayArea;

VGA_G = 0 & inDisplayArea;

VGA_B = 0 & inDisplayArea;

end

end

S3: begin

if(Auto3 || Auto6)

begin 

VGA_R = 3'b111 & inDisplayArea;

VGA_G = 3'b000 & inDisplayArea;

VGA_B = 2'b00 & inDisplayArea;

end 

else if(Auto11 || Auto14) 

begin 

VGA_R = 3'b000 & inDisplayArea;

VGA_G = 3'b111 & inDisplayArea;

VGA_B = 2'b00 & inDisplayArea; 

end 

else if (Auto1 || Auto2 != Auto3 != Auto4 != Auto5 != Auto6 != Auto7 != Auto8 != Auto9 != Auto10 != Auto11 != Auto12 != Auto13 != Auto14)

begin

VGA_R = 3'b111 & inDisplayArea;

VGA_G = 3'b111 & inDisplayArea;

VGA_B = 2'b11 & inDisplayArea;

end

else

begin

VGA_R = 0 & inDisplayArea;

VGA_G = 0 & inDisplayArea;

VGA_B = 0 & inDisplayArea;

end

end

S4: begin

if(Auto3 || Auto6)

begin 

VGA_R = 3'b111 & inDisplayArea;

VGA_G = 3'b000 & inDisplayArea;

VGA_B = 2'b00 & inDisplayArea;

end 

else if(Auto10 || Auto13) 

begin 

VGA_R = 3'b111 & inDisplayArea;

VGA_G = 3'b111 & inDisplayArea;

VGA_B = 2'b00 & inDisplayArea; 

end 

else if (Auto1 || Auto2 != Auto3 != Auto4 != Auto5 != Auto6 != Auto7 != Auto8 != Auto9 != Auto10 != Auto11 != Auto12 != Auto13 != Auto14)

begin

VGA_R = 3'b111 & inDisplayArea;

VGA_G = 3'b111 & inDisplayArea;

VGA_B = 2'b11 & inDisplayArea;

end

else

begin

VGA_R = 0 & inDisplayArea;

VGA_G = 0 & inDisplayArea;

VGA_B = 0 & inDisplayArea;

end

end

S5: begin

if(Auto3 || Auto6)

begin 

VGA_R = 3'b111 & inDisplayArea;

VGA_G = 3'b000 & inDisplayArea;

VGA_B = 2'b00 & inDisplayArea;

end 

else if(Auto9 || Auto12) 

begin 

VGA_R = 3'b111 & inDisplayArea;

VGA_G = 3'b000 & inDisplayArea;

VGA_B = 2'b00 & inDisplayArea;

end 

else if (Auto1 || Auto2 != Auto3 != Auto4 != Auto5 != Auto6 != Auto7 != Auto8 != Auto9 != Auto10 != Auto11 != Auto12 != Auto13 != Auto14)

begin

VGA_R = 3'b111 & inDisplayArea;

VGA_G = 3'b111 & inDisplayArea;

VGA_B = 2'b11 & inDisplayArea;

end

end

else

begin

VGA_R = 0 & inDisplayArea;

VGA_G = 0 & inDisplayArea;

VGA_B = 0 & inDisplayArea;

end

default begin

VGA_R = 0 & inDisplayArea;

VGA_G = 0 & inDisplayArea;

VGA_B = 0 & inDisplayArea;

end

endcase

end 

endmodule 

Your help is greatly appreciated. 

[Altera_Forum]

Have you simulated the code? Software you need is called ModelSim and is supplied with Quartus II.  

This does not look fine: assign clk3 = q[24]; // 3 Hz Use your real clock for rising edge and your newly derived clk3 with an if-statement like this:  always @(posedge clk) begin  if (clk3) begin...