//www.21eda.com
//开发板型号:A-C8V4
//深圳市21EDA电子
//利用Verilog驱动LCD12864
//本实验是用LCD12864显示汉字。(LCD带字库)
//视频教程适合我们21EDA电子的所有学习板)
module LCD12864 (clk, rs, rw, en,dat);
input clk; //系统时钟输入50M
output [7:0] dat; //LCD的8位数据口
output rs,rw,en; //LCD的控制脚
reg e;
reg [7:0] dat;
reg rs;
reg [15:0] counter;
reg [6:0] current,next;
reg clkr;
reg [1:0] cnt;
//定义的一些状态机。
parameter set0=6'h0;
parameter set1=6'h1;
parameter set2=6'h2;
parameter set3=6'h3;
parameter set4=6'h4;
parameter set5=6'h5;
parameter set6=6'h6;
parameter dat0=6'h7;
parameter dat1=6'h8;
parameter dat2=6'h9;
parameter dat3=6'hA;
parameter dat4=6'hB;
parameter dat5=6'hC;
parameter dat6=6'hD;
parameter dat7=6'hE;
parameter dat8=6'hF;
parameter dat9=6'h10;
parameter dat10=6'h12;
parameter dat11=6'h13;
parameter dat12=6'h14;
parameter dat13=6'h15;
parameter dat14=6'h16;
parameter dat15=6'h17;
parameter dat16=6'h18;
parameter dat17=6'h19;
parameter dat18=6'h1A;
parameter dat19=6'h1B;
parameter dat20=6'h1C;
parameter dat21=6'h1D;
parameter dat22=6'h1E;
parameter dat23=6'h1F;
parameter dat24=6'h20;
parameter dat25=6'h21;
parameter dat26=6'h22;
parameter dat27=6'h23;
parameter dat28=6'h24;
parameter dat29=6'h25;
parameter dat30=6'h26;
parameter dat31=6'h27;
parameter dat32=6'h28;
parameter dat33=6'h29;
parameter dat34=6'h2A;
parameter dat35=6'h2B;
parameter dat36=6'h2C;
parameter dat37=6'h2E;
parameter dat38=6'h2F;
parameter dat39=6'h30;
parameter dat40=6'h31;
parameter dat41=6'h32;
parameter dat42=6'h33;
parameter dat43=6'h34;
/////////////////////////////////////////////
parameter nul=6'h35;
always @(posedge clk) //da de shi zhong pinlv
begin
counter=counter+1;
if(counter==16'h000f)
clkr=~clkr;
end
////////////////////////////////////////////////
always @(posedge clkr)
begin
current=next;
case(current)
set0: begin rs<=0; dat<=8'h31; next<=set1; end //*设置8位格式,*
set1: begin rs<=0; dat<=8'h0C; next<=set2; end //*整体显示,关光标,不闪烁*/
set2: begin rs<=0; dat<=8'h06; next<=set3; end //*设定输入方式,增量不移位*/
set3: begin rs<=0; dat<=8'h01; next<=dat0; end //*清除显示*/
dat0: begin rs<=1; dat<=8'hc9; next<=dat1; end //显示第一行
dat1: begin rs<=1; dat<=8'hee; next<=dat2; end
//上面是‘深’字的ACSII码值 C9EE
dat2: begin rs<=1; dat<=8'hdb; next<=dat3; end
dat3: begin rs<=1; dat<=8'hda;next<=dat4; end
//上面是‘圳’字的ACSII码值DBDA
dat4: begin rs<=1; dat<=8'hca; next<=dat5; end
dat5: begin rs<=1; dat<=8'hd0; next<=dat6; end
//上面是‘市’字的ACSII码值CAD0
dat6: begin rs<=1; dat<="2"; next<=dat7; end
dat7: begin rs<=1; dat<="1";next<=dat8; end
dat8: begin rs<=1; dat<="E"; next<=dat9; end
dat9: begin rs<=1; dat<="D";next<= dat10 ; end
dat10: begin rs<=1; dat<=8'hB5; next<=dat11; end
dat11: begin rs<=1; dat<=8'hE7; next<=dat12; end
//上面是‘电’字的ACSII码值B5E7
dat12: begin rs<=1; dat<=8'hd7;next<=dat13; end
dat13: begin rs<=1; dat<=8'hd3; next<=set4; end
//上面是‘子’字的ACSII码值D7D3
set4: begin rs<=0; dat<=8'h90; next<=dat14; end //显示第二行
dat14: begin rs<=1; dat<=8'hD0; next<=dat15; end
dat15: begin rs<=1; dat<=8'hCD; next<=dat16; end
//上面是‘型’字的ACSII码值D0CD
dat16: begin rs<=1; dat<=8'hBA; next<=dat17; end
dat17: begin rs<=1; dat<=8'hC5; next<=dat18; end
//上面是‘号’字的ACSII码值BAC5
dat18: begin rs<=1; dat<=":"; next<=dat19; end
dat19: begin rs<=1; dat<="A"; next<=dat20; end
dat20: begin rs<=1; dat<="-"; next<=dat21; end
dat21: begin rs<=1; dat<="C"; next<=dat22; end
dat22: begin rs<=1; dat<="8"; next<=dat23; end
dat23: begin rs<=1; dat<="V"; next<=dat24 ; end
dat24: begin rs<=1; dat<="4"; next<=dat25; end
dat25: begin rs<=1; dat<=" "; next<=dat26; end
dat26: begin rs<=1; dat<=8'hbf; next<=dat27; end
dat27: begin rs<=1; dat<=8'hd8; next<=dat28; end
//上面是‘控’字的ACSII码值BFD8
dat28: begin rs<=1; dat<=8'hd6; next<=dat29; end
dat29: begin rs<=1; dat<=8'hc6; next<=set5 ; end
//上面是‘制’字的ACSII码值D6C6
set5: begin rs<=0; dat<=8'h88; next<=dat30; end //显示第三行
dat30: begin rs<=1; dat<="L"; next<=dat31; end
dat31: begin rs<=1; dat<="C"; next<=dat32; end
dat32: begin rs<=1; dat<="D"; next<=dat33; end
dat33: begin rs<=1; dat<="1"; next<=dat34; end
dat34: begin rs<=1; dat<="2"; next<=dat35; end
dat35: begin rs<=1; dat<="8"; next<=dat36; end
dat36: begin rs<=1; dat<="6"; next<=dat37; end
dat37: begin rs<=1; dat<="4"; next<=set6; end
set6: begin rs<=0; dat<=8'h9C; next<=dat38; end //显示第四行
dat38: begin rs<=1; dat<="G"; next<=dat39; end
dat39: begin rs<=1; dat<="O"; next<=dat40; end
dat40: begin rs<=1; dat<="O"; next<=dat41; end
dat41: begin rs<=1; dat<="D"; next<=dat42; end
dat42: begin rs<=1; dat<="!"; next<=dat43; end
dat43: begin rs<=1; dat<="!"; next<=nul; end
nul: begin rs<=0; dat<=8'h00; // 把液晶的E 脚 拉高
if(cnt!=2'h2)
begin
e<=0;next<=set0;cnt<=cnt+1;
end
else
begin next<=nul; e<=1;
end
end
default: next=set0;
endcase
end
assign en=clkr|e;
assign rw=0;
endmodule
verilog程序,自己翻译成VHDL吧
LCD有文档的吧? 对应规范的写个模块就行了