Hello,
Am a newbie with verilog and i have been trying to write a verilog code to display some characters on the lcd module on the cyclone 3 board...any help will be appreciated...my code is posted below..is this a good starting point or am totally off:
module lcd_display (clk,lcd_rs, lcd_rw, lcd_e, lcd_code);
input clk;
//input user_dipswitch2;
//input user_dipswitch3;
//input [15:0]counter_out;
reg [15:0] count=0;
output reg lcd_rs ;
output reg lcd_rw ;
inout reg [3:0]lcd_code;
output reg lcd_e;
initial
begin
lcd_rs = 0;
lcd_rw = 0;
lcd_e = 0;
end
always @ (posedge clk)
// if (user_dipswitch2) //initialize lcd
begin
count = count + 1;
lcd_e = 1;
case (count)
16'h000f: lcd_code = 4'b0010; // function set
16'h001f: lcd_code = 4'b0010;
16'h0022: lcd_code = 4'b1100;
16'h0797: lcd_code = 4'b0000; // display on
16'h079f: lcd_code = 4'b1110;
16'h1692: lcd_code = 4'b0000; //clear display
16'h169a: lcd_code = 4'b0001;
16'he845: lcd_code = 4'b0000; //entry mode set
16'he84c: lcd_code = 4'b0110;
16'hf200: lcd_code = 4'b0100; // set CGRAM address;
16'hf20f: lcd_code = 4'b0110;
16'hffaf: lcd_code = 4'b1000; //set DDRAM address
16'hfffe: lcd_code = 4'b0110;
16'hffff: begin
lcd_rs = 1;
lcd_code = 4'b1111;
end
endcase
end
// always @ (posedge clk)
// if (user_dipswitch3)
// begin
// count = 0;
// lcd_rs = 1;
// lcd_code <= counter_out [15:12];
// lcd_code <= counter_out [11:8];
// lcd_code <= counter_out [7:4];
// lcd_code <= counter_out [3:0];
// end
//
endmodule
