模块框图：
时序图：
代码：
/*
// 24'h000000 4324 9Mhz 480*272
// 24'h800000 7084 33Mhz 800*480
// 24'h008080 7016 50Mhz 1024*600
// 24'h000080 4384 33Mhz 800*480
// 24'h800080 1018 70Mhz 1280*800
*/
module rd_id(
input wire sys_clk ,
input wire sys_rst_n ,
input wire [23:0] lcd_rgb ,
output reg [15:0] lcd_id
);
reg rd_flag ;
always @(posedge sys_clk or negedge sys_rst_n) begin
if(~sys_rst_n)
rd_flag <= 1'b1 ;
else
rd_flag <= 1'b0 ;
end
always @(posedge sys_clk or negedge sys_rst_n) begin
if(~sys_rst_n)
lcd_id <= 24'd0 ;
else if(rd_flag) begin
case (lcd_rgb)
24'h000000: lcd_id <= 16'd4324 ;
24'h800000: lcd_id <= 16'd7084 ;
24'h008080: lcd_id <= 16'd7016 ;
24'h000080: lcd_id <= 16'd4384 ;
24'h800080: lcd_id <= 16'd1018 ;
default : lcd_id <= 16'd1018 ;
endcase
end
end
endmodulemodule clk_div(
input wire sys_clk ,
input wire sys_rst_n ,
input wire [15:0] lcd_id ,
output reg clk_lcd ,
output wire rst_n
);
wire clk_9Mhz ;
wire clk_33Mhz ;
wire clk_50Mhz ;
wire clk_70Mhz ;
wire locked ;
assign rst_n = (sys_rst_n && locked) ;
always @(*) begin
case (lcd_id)
16'd4324: clk_lcd <= clk_9Mhz ;
16'd7084: clk_lcd <= clk_33Mhz ;
16'd7016: clk_lcd <= clk_50Mhz ;
16'd4384: clk_lcd <= clk_33Mhz ;
16'd1018: clk_lcd <= clk_70Mhz ;
default : clk_lcd <= 1'b0 ;
endcase
end
pll pll_inst(
.clk_in ( sys_clk ) ,
.resetn ( sys_rst_n ) ,
.clk_9Mhz ( clk_9Mhz ) ,
.clk_33Mhz ( clk_33Mhz ) ,
.clk_50Mhz ( clk_50Mhz ) ,
.clk_70Mhz ( clk_70Mhz ) ,
.locked ( locked )
);
endmodule// 根据传进来的有效图像坐标信息，产生有效的像素数据。
module lcd_display (
input wire sys_clk ,
input wire sys_rst_n ,
input wire [10:0] axi_x ,
input wire [10:0] axi_y ,
input wire [10:0] H_SYNC ,
input wire [10:0] H_BACK ,
input wire [10:0] H_DISP ,
input wire [10:0] V_SYNC ,
input wire [10:0] V_BACK ,
input wire [10:0] V_DISP ,
output reg [23:0] pix_data
);
localparam BLACK = 24'h000000 , // 黑色
WHITE = 24'hFFFFFF , // 白色
RosyBrown = 24'hBC8F8F , // 玫瑰褐
RED = 24'hFF0000 , // 红色
APRICOT = 24'hE69966 , // 杏黄色
VIOLET = 24'h8B00FF , // 紫罗兰色
LINEN = 24'hFAF0E6 , // 亚麻色
KHAKI = 24'h996B1F , // 卡其色
PEACH = 24'hFFE5B4 , // 桃色
GOLDEN = 24'hFFD700 , // 金色
SkyBule = 24'h87CEEB ; // 天空蓝
always @(posedge sys_clk or negedge sys_rst_n) begin
if(~sys_rst_n)
pix_data <= BLACK ;
else if((axi_y >= V_SYNC + V_BACK) && (axi_y <= V_SYNC + V_BACK + V_DISP - 1)) begin// 在场同步有效区间内
if((axi_x >= H_SYNC + H_BACK) && (axi_x <= H_SYNC + H_BACK + H_DISP/10 - 1))
pix_data <= WHITE ;
else
if((axi_x >= H_SYNC + H_BACK + H_DISP/10) && (axi_x <= H_SYNC + H_BACK + (H_DISP/10)*2 - 1))
pix_data <= BLACK ;
else
if((axi_x >= H_SYNC + H_BACK + (H_DISP/10)*2) && (axi_x <= H_SYNC + H_BACK + (H_DISP/10)*3 - 1))
pix_data <= RosyBrown ;
else
if((axi_x >= H_SYNC + H_BACK + (H_DISP/10)*3) && (axi_x <= H_SYNC + H_BACK + (H_DISP/10)*4 - 1))
pix_data <= APRICOT ;
else
if((axi_x >= H_SYNC + H_BACK + (H_DISP/10)*4) && (axi_x <= H_SYNC + H_BACK + (H_DISP/10)*5 - 1))
pix_data <= RED ;
else
if((axi_x >= H_SYNC + H_BACK + (H_DISP/10)*5) && (axi_x <= H_SYNC + H_BACK + (H_DISP/10)*6 - 1))
pix_data <= VIOLET ;
else
if((axi_x >= H_SYNC + H_BACK + (H_DISP/10)*6) && (axi_x <= H_SYNC + H_BACK + (H_DISP/10)*7 - 1))
pix_data <= KHAKI ;
else
if((axi_x >= H_SYNC + H_BACK + (H_DISP/10)*7) && (axi_x <= H_SYNC + H_BACK + (H_DISP/10)*8 - 1))
pix_data <= PEACH ;
else
if((axi_x >= H_SYNC + H_BACK + (H_DISP/10)*8) && (axi_x <= H_SYNC + H_BACK + (H_DISP/10)*9 - 1))
pix_data <= GOLDEN ;
else
if((axi_x >= H_SYNC + H_BACK + (H_DISP/10)*9) && (axi_x <= H_SYNC + H_BACK + (H_DISP/10)*10 - 1))
pix_data <= SkyBule ;
else
pix_data <= BLACK ;
end
else
pix_data <= BLACK ;
end
endmodule// 接口模块，产生接口时序。又名驱动模块。
// 产生像素信息，有效信号。其余信号直接赋值1
module lcd_driver (
input wire sys_clk ,
input wire sys_rst_n ,
input wire [23:0] pix_data ,
input wire [15:0] lcd_id ,
output wire [10:0] H_SYNCtoDIS ,
output wire [10:0] H_BACKtoDIS ,
output wire [10:0] H_DISPtoDIS ,
output wire [10:0] V_SYNCtoDIS ,
output wire [10:0] V_BACKtoDIS ,
output wire [10:0] V_DISPtoDIS ,
output reg lcd_de ,
output wire [23:0] lcd_rgb_out ,
output wire lcd_bl ,
output wire lcd_rstn ,
output wire lcd_hsync ,
output wire lcd_vsync ,
output wire lcd_clk ,
output wire [10:0] axi_x ,
output wire [10:0] axi_y
);
// localparam
// 4.3' 480*272
localparam H_SYNC_4342 = 11'd41 ,
H_BACK_4342 = 11'd2 ,
H_DISP_4342 = 11'd480 ,
H_FRONT_4342 = 11'd2 ,
H_TOTAL_4342 = 11'd525 ,
V_SYNC_4342 = 11'd10 ,
V_BACK_4342 = 11'd2 ,
V_DISP_4342 = 11'd272 ,
V_FRONT_4342 = 11'd2 ,
V_TOTAL_4342 = 11'd286 ,
// 7' 800*480
H_SYNC_7084 = 11'd128 ,
H_BACK_7084 = 11'd88 ,
H_DISP_7084 = 11'd800 ,
H_FRONT_7084 = 11'd40 ,
H_TOTAL_7084 = 11'd1056 ,
V_SYNC_7084 = 11'd2 ,
V_BACK_7084 = 11'd33 ,
V_DISP_7084 = 11'd480 ,
V_FRONT_7084 = 11'd10 ,
V_TOTAL_7084 = 11'd525 ,
// 7' 1024*600
H_SYNC_7016 = 11'd20 ,
H_BACK_7016 = 11'd140 ,
H_DISP_7016 = 11'd1024 ,
H_FRONT_7016 = 11'd160 ,
H_TOTAL_7016 = 11'd1344 ,
V_SYNC_7016 = 11'd3 ,
V_BACK_7016 = 11'd20 ,
V_DISP_7016 = 11'd600 ,
V_FRONT_7016 = 11'd12 ,
V_TOTAL_7016 = 11'd635 ,
// 10.1' 1280*800
H_SYNC_1018 = 11'd10 ,
H_BACK_1018 = 11'd80 ,
H_DISP_1018 = 11'd1280 ,
H_FRONT_1018 = 11'd70 ,
H_TOTAL_1018 = 11'd1440 ,
V_SYNC_1018 = 11'd3 ,
V_BACK_1018 = 11'd10 ,
V_DISP_1018 = 11'd800 ,
V_FRONT_1018 = 11'd10 ,
V_TOTAL_1018 = 11'd823 ,
// 4.3' 800*480
H_SYNC_4384 = 11'd128 ,
H_BACK_4384 = 11'd88 ,
H_DISP_4384 = 11'd800 ,
H_FRONT_4384 = 11'd40 ,
H_TOTAL_4384 = 11'd1056 ,
V_SYNC_4384 = 11'd2 ,
V_BACK_4384 = 11'd33 ,
V_DISP_4384 = 11'd480 ,
V_FRONT_4384 = 11'd10 ,
V_TOTAL_4384 = 11'd525 ;
// 不同分辨率时序参数不同
reg [10:0] H_SYNC ;
reg [10:0] H_BACK ;
reg [10:0] H_DISP ;
reg [10:0] H_FRONT ;
reg [10:0] H_TOTAL ;
reg [10:0] V_SYNC ;
reg [10:0] V_BACK ;
reg [10:0] V_DISP ;
reg [10:0] V_FRONT ;
reg [10:0] V_TOTAL ;
// reg signal define
reg [10:0] cnt_row ; // 行计数器，记录一行中的第几列。行计数器归零，说明一行扫描完。
reg [10:0] cnt_col ; // 列计数器，记录一列中的第几行。列计数器归零，说明一帧图像扫描完。
// wire signal define
wire valid_H ; // 行时序有效信号
wire valid_V ; // 列时序有效信号
wire valid_HV; // 图像有效信号，由于lcd_display模块中产生像素数据信息是时序逻辑，所以lcd_de信号要对图像有效信号打1拍。
/******************************************************************************************
********************************************main code**************************************
*******************************************************************************************/
// 时序参数赋值
always @(*) begin
case(lcd_id)
16'd4324: begin
H_SYNC = H_SYNC_4342 ;
H_BACK = H_BACK_4342 ;
H_DISP = H_DISP_4342 ;
H_FRONT = H_FRONT_4342 ;
H_TOTAL = H_TOTAL_4342 ;
V_SYNC = V_SYNC_4342 ;
V_BACK = V_BACK_4342 ;
V_DISP = V_DISP_4342 ;
V_FRONT = V_FRONT_4342 ;
V_TOTAL = V_TOTAL_4342 ;
end
16'd7084: begin
H_SYNC = H_SYNC_7084 ;
H_BACK = H_BACK_7084 ;
H_DISP = H_DISP_7084 ;
H_FRONT = H_FRONT_7084 ;
H_TOTAL = H_TOTAL_7084 ;
V_SYNC = V_SYNC_7084 ;
V_BACK = V_BACK_7084 ;
V_DISP = V_DISP_7084 ;
V_FRONT = V_FRONT_7084 ;
V_TOTAL = V_TOTAL_7084 ;
end
16'd7016: begin
H_SYNC = H_SYNC_7016 ;
H_BACK = H_BACK_7016 ;
H_DISP = H_DISP_7016 ;
H_FRONT = H_FRONT_7016 ;
H_TOTAL = H_TOTAL_7016 ;
V_SYNC = V_SYNC_7016 ;
V_BACK = V_BACK_7016 ;
V_DISP = V_DISP_7016 ;
V_FRONT = V_FRONT_7016 ;
V_TOTAL = V_TOTAL_7016 ;
end
16'd4384: begin
H_SYNC = H_SYNC_4384 ;
H_BACK = H_BACK_4384 ;
H_DISP = H_DISP_4384 ;
H_FRONT = H_FRONT_4384 ;
H_TOTAL = H_TOTAL_4384 ;
V_SYNC = V_SYNC_4384 ;
V_BACK = V_BACK_4384 ;
V_DISP = V_DISP_4384 ;
V_FRONT = V_FRONT_4384 ;
V_TOTAL = V_TOTAL_4384 ;
end
16'd1018: begin
H_SYNC = H_SYNC_1018 ;
H_BACK = H_BACK_1018 ;
H_DISP = H_DISP_1018 ;
H_FRONT = H_FRONT_1018 ;
H_TOTAL = H_TOTAL_1018 ;
V_SYNC = V_SYNC_1018 ;
V_BACK = V_BACK_1018 ;
V_DISP = V_DISP_1018 ;
V_FRONT = V_FRONT_1018 ;
V_TOTAL = V_TOTAL_1018 ;
end
default : begin
H_SYNC = H_SYNC_1018 ;
H_BACK = H_BACK_1018 ;
H_DISP = H_DISP_1018 ;
H_FRONT = H_FRONT_1018 ;
H_TOTAL = H_TOTAL_1018 ;
V_SYNC = V_SYNC_1018 ;
V_BACK = V_BACK_1018 ;
V_DISP = V_DISP_1018 ;
V_FRONT = V_FRONT_1018 ;
V_TOTAL = V_TOTAL_1018 ;
end
endcase
end
// // reg signal define
// reg [10:0] cnt_row ; // 行计数器，记录一行中的第几列。行计数器归零，说明一行扫描完。
always @(posedge sys_clk or negedge sys_rst_n) begin
if(~sys_rst_n)
cnt_row <= 11'd0 ;
else if(cnt_row == (H_TOTAL - 1))
cnt_row <= 11'd0 ;
else
cnt_row <= cnt_row + 1'b1 ;
end
// reg [10:0] cnt_col ; // 列计数器，记录一列中的第几行。列计数器归零，说明一帧图像扫描完。
always @(posedge sys_clk or negedge sys_rst_n) begin
if(~sys_rst_n)
cnt_col <= 11'd0 ;
else if((cnt_col == (V_TOTAL - 1)) && (cnt_row == (H_TOTAL - 1)))
cnt_col <= 11'd0 ;
else if(cnt_row == (H_TOTAL - 1))
cnt_col <= cnt_col + 1'b1 ;
else
cnt_col <= cnt_col ;
end
// // wire signal define
// wire valid_H ; // 行时序有效信号
assign valid_H = ((cnt_row >= H_SYNC + H_BACK) && (cnt_row <= H_SYNC + H_BACK + H_DISP - 1)) ? 1'b1 : 1'b0 ;
// wire valid_V ; // 列时序有效信号
assign valid_V = ((cnt_col >= V_SYNC + V_BACK) && (cnt_col <= V_SYNC + V_BACK + V_DISP - 1)) ? 1'b1 : 1'b0 ;
// wire valid_HV; // 图像有效信号，由于lcd_display模块中产生像素数据信息是时序逻辑，所以lcd_de信号要对图像有效信号打1拍。
assign valid_HV = (valid_H && valid_V) ;
// output wire [10:0] axi_x ,
assign axi_x = (valid_HV) ? cnt_row : 11'd0 ;
// output wire [10:0] axi_y ,
assign axi_y = (valid_HV) ? cnt_col : 11'd0 ;
// output wire [23:0] lcd_rgb_out ,
assign lcd_rgb_out = pix_data ;
// output reg lcd_de ,
always @(posedge sys_clk or negedge sys_rst_n) begin
if(~sys_rst_n)
lcd_de <= 1'b0 ;
else
lcd_de <= valid_HV ;
end
// 本实验没用到的信号，赋值1;
assign lcd_bl = 1'b1 ;
assign lcd_rstn = 1'b1 ;
assign lcd_hsync = 1'b1 ;
assign lcd_vsync = 1'b1 ;
assign lcd_clk = (sys_rst_n == 1'b1) ? sys_clk : 1'b0 ;
// 传给像素数据生成模块的时序参数
assign H_SYNCtoDIS = H_SYNC ;
assign H_BACKtoDIS = H_BACK ;
assign H_DISPtoDIS = H_DISP ;
assign V_SYNCtoDIS = V_SYNC ;
assign V_BACKtoDIS = V_BACK ;
assign V_DISPtoDIS = V_DISP ;
endmodulemodule top (
input wire sys_clk ,
input wire sys_rst_n ,
inout wire [23:0] lcd_rgb ,
output wire lcd_de ,
output wire lcd_bl ,
output wire lcd_rstn ,
output wire lcd_hsync ,
output wire lcd_vsync ,
output wire lcd_clk
);
// inout
wire [23:0] lcd_rgb_out ;
wire [23:0] lcd_rgb_in ;
assign lcd_rgb = (lcd_de) ? lcd_rgb_out : 24'dz ;
assign lcd_rgb_in = lcd_rgb ;
// 例化间连线
wire [15:0] lcd_id ;
wire clk_lcd ;
wire rst_n ;
wire [10:0] H_SYNCtoDIS ;
wire [10:0] H_BACKtoDIS ;
wire [10:0] H_DISPtoDIS ;
wire [10:0] V_SYNCtoDIS ;
wire [10:0] V_BACKtoDIS ;
wire [10:0] V_DISPtoDIS ;
wire [10:0] axi_x ;
wire [10:0] axi_y ;
wire [23:0] pix_data ;
rd_id rd_id_inst(
.sys_clk ( sys_clk ) ,
.sys_rst_n ( sys_rst_n ) ,
.lcd_rgb ( lcd_rgb_in ) ,
.lcd_id ( lcd_id )
);
clk_div clk_div_inst(
.sys_clk ( sys_clk ) ,
.sys_rst_n ( sys_rst_n ) ,
.lcd_id ( lcd_id ) ,
.clk_lcd ( clk_lcd ) ,
.rst_n ( rst_n )
);
lcd_driver lcd_driver_inst(
.sys_clk ( clk_lcd ) ,
.sys_rst_n ( rst_n ) ,
.pix_data ( pix_data ) ,
.lcd_id ( lcd_id ) ,
.H_SYNCtoDIS ( H_SYNCtoDIS ) ,
.H_BACKtoDIS ( H_BACKtoDIS ) ,
.H_DISPtoDIS ( H_DISPtoDIS ) ,
.V_SYNCtoDIS ( V_SYNCtoDIS ) ,
.V_BACKtoDIS ( V_BACKtoDIS ) ,
.V_DISPtoDIS ( V_DISPtoDIS ) ,
.lcd_de ( lcd_de ) ,
.lcd_rgb_out ( lcd_rgb_out ) ,
.lcd_bl ( lcd_bl ) ,
.lcd_rstn ( lcd_rstn ) ,
.lcd_hsync ( lcd_hsync ) ,
.lcd_vsync ( lcd_vsync ) ,
.lcd_clk ( lcd_clk ) ,
.axi_x ( axi_x ) ,
.axi_y ( axi_y )
);
lcd_display lcd_display_inst(
.sys_clk ( clk_lcd ) ,
.sys_rst_n ( rst_n ) ,
.axi_x ( axi_x ) ,
.axi_y ( axi_y ) ,
.H_SYNC ( H_SYNCtoDIS ) ,
.H_BACK ( H_BACKtoDIS ) ,
.H_DISP ( H_DISPtoDIS ) ,
.V_SYNC ( V_SYNCtoDIS ) ,
.V_BACK ( V_BACKtoDIS ) ,
.V_DISP ( V_DISPtoDIS ) ,
.pix_data ( pix_data )
);
endmodule`timescale 1ns/1ns
module test_top();
reg sys_clk ;
reg sys_rst_n ;
wire [23:0] lcd_rgb ;
wire lcd_de ;
wire lcd_bl ;
wire lcd_rstn ;
wire lcd_hsync ;
wire lcd_vsync ;
wire lcd_clk ;
assign lcd_rgb = lcd_de ? {24{1'bz}} : 24'h80;
top top_inst(
.sys_clk ( sys_clk ) ,
.sys_rst_n ( sys_rst_n ) ,
.lcd_rgb ( lcd_rgb ) ,
.lcd_de ( lcd_de ) ,
.lcd_bl ( lcd_bl ) ,
.lcd_rstn ( lcd_rstn ) ,
.lcd_hsync ( lcd_hsync ) ,
.lcd_vsync ( lcd_vsync ) ,
.lcd_clk ( lcd_clk )
);
parameter CYCLE = 20 ;
initial begin
sys_clk = 1'b1 ;
sys_rst_n <= 1'b0 ;
#( CYCLE * 10 ) ;
#2 ;
sys_rst_n <= 1'b1 ;
#( CYCLE * 1000 ) ;
$stop ;
end
always #( CYCLE / 2 ) sys_clk = ~sys_clk ;
endmodule仿真：
