top.v

FPGA驱动STN （16x2）的程序

`timescale 1ns / 100ps
module top(              
           // input port                                                             
           clk_in, // 1s    
           rst_n,        
           // out port   
           lcd_e,        
           lcd_rs,       
           lcd_rw,       
           lcd_data      
);   
// input signal                
input              clk_in;        
input              rst_n;      
// output signal               
output             lcd_e;      
output             lcd_rs;     
output             lcd_rw;     
output [7:0]       lcd_data;   
//             
wire             clk_in;                     
wire             rst_n; 
                   
wire             lcd_e;      
wire             lcd_rs;     
wire             lcd_rw;     
wire [7:0]       lcd_data;  
 
//wire             clk_out; 
//--------------------------------------           
clk_div U_div(                    
              //input port        
              .clk_in(clk_in), // 50Mhz    
              .rst_n(rst_n),              
              //output port       
              .clk_out(clk_out) // 1s       
);                                 

lcd_control U_lcd(                                 
                  // input port 
                  .clk(clk_out), // 1s    
                  //.clk(clk_in), // 50Mhz
                  .rst_n(rst_n),        
                  // out port   
                  .lcd_e(lcd_e),        
                  .lcd_rs(lcd_rs),       
                  .lcd_rw(lcd_rw),       
                  .lcd_data(lcd_data)      
);                              

endmodule