1. 用FPGA編寫12864顯示的程序，跪求。。。可以顯示就行，內容可以是字母。。謝謝
/*LCD12864顯示程序
此程序控制LCD12864液晶屏,IC為KS0108或兼容型號
圖形文件獲取方法:
在字模提取V21軟體中 ,導入一幅128*64黑白圖像.
* 參數設置：
* 參數設置->其它選項，選擇縱向取模，勾上位元組倒序，保留逗號,
* 取模方式為C51。
將生成的數組通過keilc等C編譯軟體,在編譯軟體中新建一工程,寫入源程序如下:
unsigned char code tab[]=
{
//圖像數據
}
編譯此工程將得到hex文件.在QII中使用lpm_rom宏功能模塊中調用此hex文件.
*
*******************************************************************************/
mole newlcd(clock,rst_n,rs,rw,en,data,lcd_cs);
// I/O口聲明
input clock; //系統時鍾
input rst_n; //復位信號
output[1:0] lcd_cs; //
output rs; //1：數據模式；0：指令模式
output rw; //1：讀操作；0：寫操作
output en; //使能信號，寫操作時在下降沿將數據送出；讀操作時保持高電平
output[7:0] data; //LCD數據匯流排
// I/O寄存器
reg rs;
reg en;
reg[1:0] lcd_cs;
reg[7:0] data;
//內部寄存器
reg[3:0] state; //狀態機
reg[3:0] next_state;
reg[20:0] div_cnt; //分頻計數器
reg[9:0] cnt; //寫操作計數器
reg cnt_rst; //寫操作計數器復位信號
wire[7:0] showdata; //要顯示的數據
reg[1:0] cs_r;
reg [2:0] page_addr;
reg [5:0] row_addr;
//內部網線
wire clk_div; //分頻時鍾
wire clk_divs;
wire page_done; //寫一行數據完成標志位
wire frame_done; //寫一屏數據完成標志位
wire left_done;
//狀態機參數
parameter idle =4'b0000,
setbase_1 =4'b0001,
setbase_2 =4'b0011,
setmode_1 =4'b0010,
setmode_2 =4'b0110,
SETpage_addr_1 =4'b0111,
SETpage_addr_2 =4'b0101,
SETrow_addr_1 =4'b1101,
SETrow_addr_2 =4'b1111,
write_right_1 =4'b1110,
write_right_2 =4'b1010,
write_nextpage_1 =4'b1011,
write_nextpage_2 =4'b1001,
wr_data_1 =4'b0100,
wr_data_2 =4'b1100;
// set_1 =4'b1000;
//******************************代碼開始*********************************
assign rw = 1'b0; //對LCD始終為寫操作
//時鍾分頻
always@(posedge clock or negedge rst_n)
begin
if(!rst_n)
div_cnt <= 0;
else
div_cnt <= div_cnt+1'b1;
end
assign clk_div = (div_cnt[15:0] == 20'h7fff);
//狀態機轉向
always@(posedge clock or negedge rst_n)
begin
if(! rst_n)
state <= idle;
else if(clk_div)
state <= next_state;
end
//************************狀態機邏輯*********************************
always@(state or page_done or left_done or frame_done or cnt or showdata or page_addr or row_addr or cs_r)
begin
rs <= 1'b0;
en <= 1'b0;
lcd_cs <= cs_r;
cnt_rst <= 1'b0;
data <= 8'h0;
case(state)
idle:
begin
next_state <= setbase_1;
cnt_rst <= 1'b1;
end
//**************************初始化LCD********************************
setbase_1: //基本指令操作
begin
lcd_cs <= 2'b11;
next_state <= setbase_2;
data <= 8'hc0;
en <= 1'b1;
end
setbase_2:
begin
lcd_cs <= 2'b11;
next_state <= setmode_1;
data <= 8'hc0;
end
//******************************************************************
setmode_1:
begin
lcd_cs <= 2'b11;
next_state <= setmode_2;
data <= 8'h3f;
en <=1'b1;
end
setmode_2:
begin
next_state <= SETpage_addr_1;
data <= 8'h3f;
end
//******************************************************************
SETpage_addr_1: //設置頁地址
begin
next_state <= SETpage_addr_2;
data <= ;
en <= 1'b1;
end
SETpage_addr_2:
begin
next_state <= SETrow_addr_1;
data <= ;
end
SETrow_addr_1: //設置列地址
begin
next_state <= SETrow_addr_2;
data <= ;
en <= 1'b1;
end
SETrow_addr_2:
begin
next_state <= wr_data_1;
data <= ;
end
//******************************************************************
/*
write_right_1: //寫完左半屏64個,換為右半屏顯示
begin
next_state <=write_right_2;
row_addr <= 0;
end
write_right_2:
begin
next_state <= SETpage_addr_1;
end
//******************************************************************
write_nextpage_1: //寫完全一行128個
begin
next_state <=write_nextpage_2;
row_addr <= 0;
end
write_nextpage_2:
begin
next_state <= SETpage_addr_1;
end
*/
//******************************************************************
wr_data_1: //寫數據到圖形顯示區
begin
next_state <= wr_data_2;
rs <= 1'b1;
en <= 1'b1;
data <= showdata;
end
wr_data_2:
begin
rs <= 1'b1;
data <= showdata;
if(left_done) //寫完左半屏數據64個
begin
if(page_done) //寫完一頁數據128個
begin
if(frame_done) //寫完一屏數據（8頁）
next_state <= idle;
else
// next_state <= write_nextpage_1;
next_state <= SETpage_addr_1;
end
else
// next_state <= write_right_1;
next_state <= SETpage_addr_1;
end
else
next_state <= wr_data_1;
end
default: next_state <= idle;
endcase
end
//********************************************************************
always@(posedge clock)
begin
if(clk_div)
begin
if(cnt_rst)
begin
cnt <= 0;
end
else if(state == wr_data_2)
begin
cnt <= cnt+1'b1;
end
end
end
//****************************************************
always@(posedge clock or negedge rst_n)
if(!rst_n)
begin
cs_r <= 2'b01;
page_addr <= 0;
end
else
if(clk_div && (state == wr_data_2))
if(page_done)//
begin
cs_r <= 2'b01;
page_addr <= page_addr + 1'b1;//一頁寫完時寫下一頁
end
else
if(left_done)
begin
cs_r <= 2'b10;
end
//*********************************************************************
//********************************************************************
assign left_done = (cnt[5:0] == 6'd63); //寫完左半屏數據64個
assign page_done = (cnt[6:0] == 7'd127); //寫完一頁數據128個
assign frame_done = (cnt[9:4] == 7'h3f); //寫完一屏數據
//***********************************************************************
//*******************************************************************
//調用ROM（圖片數據）
rom rom(.address(cnt+'d8),.clock(clock),.q(showdata));
endmole
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