TFT屏幕波形显示

REVIEW

关于TFT显示屏，之前已经做过彩条显示：

TFT显示屏驱动_tft驱动-CSDN博客

关于ROM IP核，以及coe文件生成：

FPGA寄存器 Vivado IP核_fpga寄存器资源-CSDN博客

1. TFT屏幕+ROM显示正弦波

①生成coe文件

%% sin-cos wave data write in coe file
clear all ;
clc ;

width = 12;%与幅值有关
N = 1024 ; % depth 数据个数
y = zeros(N , 1) ;
for i = 1:1:N
x = i ;
y(i,1) = ceil( 240*cos(x*2*pi/400) ) + 240 ;%显示屏800*480
end
plot(y);
hold on;
fid = fopen('cos_1024.coe','wt');
%- standard format
fprintf( fid, 'MEMORY_INITIALIZATION_RADIX = 10;\n');
fprintf( fid, 'MEMORY_INITIALIZATION_VECTOR =\n');
%- write data in coe file
for i = 1:1:N
fprintf(fid,'%d,\n',y(i,1));
end
fclose(fid);

②配置ROM

③VGA时钟配置

④VGA_CTRL

module VGA_CTRL(
input clk ,
input reset_n ,
input [15:0]data ,
output reg data_req ,
output reg [11:0]H_addr , //当前扫描点的H坐标
output reg [11:0]V_addr , //当前扫描点的V坐标
output reg VGA_HS ,
output reg VGA_VS ,
output reg VGA_BLK , //BLK表示的就是输出输出的时间段
output reg [15:0]VGA_RGB //{R[7:0]、G[7:0]、B[7:0]}
);


`include "vga_parameter.v"
localparam VGA_HS_end = `H_Sync_Time - 1'b1 ;
localparam Hdat_begin = `H_Sync_Time + `H_Back_Porch + `H_Left_Border - 1'b1 ;
localparam Hdat_end = `H_Total_Time - `H_Right_Border - `H_Front_Porch - 1'b1 ;
localparam Hpixel_end = `H_Total_Time - 1'b1 ;
localparam VGA_VS_end = `V_Sync_Time - 1'b1 ;
localparam Vdat_begin = `V_Sync_Time + `V_Back_Porch + `V_Top_Border - 1'b1 ;
localparam Vdat_end = `V_Total_Time - `V_Bottom_Border - `V_Front_Porch - 1'b1 ;
localparam Vline_end = `V_Total_Time - 1'b1 ;

//行计数器
reg[11:0]H_cnt;
always@(posedge clk or negedge reset_n)
if(!reset_n) H_cnt <= 0 ;
else if(H_cnt == Hpixel_end)
H_cnt <= 0 ;
else
H_cnt <= H_cnt + 1'b1 ;

// 场计数器
reg[11:0]V_cnt;
always@(posedge clk or negedge reset_n)
if(!reset_n) V_cnt <= 0 ;
else if(H_cnt == Hpixel_end)
if(V_cnt == Vline_end)
V_cnt <= 0 ;
else
V_cnt <= V_cnt + 1'b1 ;
else
V_cnt <= V_cnt ;

// VGA_HS
always@(posedge clk or negedge reset_n)
if(!reset_n) VGA_HS <= 1;
else if(H_cnt == 0) VGA_HS <= 0;
else if(H_cnt > VGA_HS_end) VGA_HS <= 1;

// VGA_VS
always@(posedge clk or negedge reset_n)
if(!reset_n) VGA_VS <= 1;
else if(V_cnt == 0) VGA_VS <= 0;
else if(V_cnt > VGA_VS_end) VGA_VS <= 1;

// data_req
always@(posedge clk or negedge reset_n)
if(!reset_n) data_req <= 0 ;
else data_req <= ((H_cnt >= Hdat_begin)&&(H_cnt < Hdat_end)&&(V_cnt >= Vdat_begin)&&(V_cnt <= Vdat_end)) ? 1 : 0;

// VGA_BLK
always@(posedge clk or negedge reset_n)
if(!reset_n) VGA_BLK <= 0 ;
else VGA_BLK <= data_req ;

// assign VGA_RGB = VGA_BLK? Data:0;
// VGA_RGB
always@(posedge clk )
if(data_req)
VGA_RGB <= data;
else
VGA_RGB <= 0;

//address
always@(posedge clk )
if(data_req)
begin
H_addr <= H_cnt - Hdat_begin;
V_addr <= V_cnt - Vdat_begin;
end
else
begin
H_addr <= 0;
V_addr <= 0;
end
endmodule

⑤vga_parameter.v

/*
使用时根据实际工作需求选择几个预定义参数就可以
MODE_RGB888 和 MODE_RGB565 两个参数二选一，用来决定驱动工作在 16 位模式还是
24 位模式
针对小梅哥提供的一系列显示设备，各个设备参数如下所述
4.3 寸屏：16 位色 RGB565 模式
5 寸屏：16 位色 RGB565 模式
GM7123 模块使用 24 位色 RGB888 模式，
Resolution_xxxx 预定义用来决定显示设备分辨率，常见设备分辨率如下所述
4.3 寸 TFT 显示屏：Resolution_480x272
5 寸 TFT 显示屏：Resolution_800x480
VGA 常见分辨率：
Resolution_640x480
Resolution_800x600
Resolution_1024x768
Resolution_1280x720
Resolution_1920x1080
*/

//以下两行预定义根据实际使用的模式，选择一个使能，另外一个使用注释的方式屏蔽
`define MODE_RGB888
//`define MODE_RGB565

//以下 7 行预定义根据实际使用的分辨率，选择一个使能，另外 6 个使用注释的方式屏蔽
//`define Resolution_480x272 1 //时钟为 9MHz
//`define Resolution_640x480 1 //时钟为 25.175MHz
`define Resolution_800x480 1 //时钟为 33MHz
//`define Resolution_800x600 1 //时钟为 40MHz TFT_5屏幕分辨率
//`define Resolution_1024x768 1 //时钟为 65MHz
//`define Resolution_1280x720 1 //时钟为 74.25MHz
//`define Resolution_1920x1080 1 //时钟为 148.5MHz

//定义不同的颜色深度
`ifdef MODE_RGB888
`define Red_Bits 8
`define Green_Bits 8
`define Blue_Bits 8
`elsif MODE_RGB565
`define Red_Bits 5
`define Green_Bits 6
`define Blue_Bits 5
`endif

//定义不同分辨率的时序参数
`ifdef Resolution_480x272
`define H_Total_Time 12'd525
`define H_Right_Border 12'd0
`define H_Front_Porch 12'd2
`define H_Sync_Time 12'd41
`define H_Back_Porch 12'd2
`define H_Left_Border 12'd0

`define V_Total_Time 12'd286
`define V_Bottom_Border 12'd0
`define V_Front_Porch 12'd2
`define V_Sync_Time 12'd10
`define V_Back_Porch 12'd2
`define V_Top_Border 12'd0


`elsif Resolution_640x480
`define H_Total_Time 12'd800
`define H_Right_Border 12'd8
`define H_Front_Porch 12'd8
`define H_Sync_Time 12'd96
`define H_Back_Porch 12'd40
`define H_Left_Border 12'd8

`define V_Total_Time 12'd525
`define V_Bottom_Border 12'd8
`define V_Front_Porch 12'd2
`define V_Sync_Time 12'd2
`define V_Back_Porch 12'd25
`define V_Top_Border 12'd8


`elsif Resolution_800x480
`define H_Total_Time 12'd1056
`define H_Right_Border 12'd0
`define H_Front_Porch 12'd40
`define H_Sync_Time 12'd128
`define H_Back_Porch 12'd88
`define H_Left_Border 12'd0

`define V_Total_Time 12'd525
`define V_Bottom_Border 12'd8
`define V_Front_Porch 12'd2
`define V_Sync_Time 12'd2
`define V_Back_Porch 12'd25
`define V_Top_Border 12'd8


`elsif Resolution_800x600
`define H_Total_Time 12'd1056
`define H_Right_Border 12'd0
`define H_Front_Porch 12'd40
`define H_Sync_Time 12'd128
`define H_Back_Porch 12'd88
`define H_Left_Border 12'd0

`define V_Total_Time 12'd628
`define V_Bottom_Border 12'd0
`define V_Front_Porch 12'd1
`define V_Sync_Time 12'd4
`define V_Back_Porch 12'd23
`define V_Top_Border 12'd0


`elsif Resolution_1024x768
`define H_Total_Time 12'd1344
`define H_Right_Border 12'd0
`define H_Front_Porch 12'd24
`define H_Sync_Time 12'd136
`define H_Back_Porch 12'd160
`define H_Left_Border 12'd0

`define V_Total_Time 12'd806
`define V_Bottom_Border 12'd0
`define V_Front_Porch 12'd3
`define V_Sync_Time 12'd6
`define V_Back_Porch 12'd29
`define V_Top_Border 12'd0


`elsif Resolution_1280x720
`define H_Total_Time 12'd1650
`define H_Right_Border 12'd0
`define H_Front_Porch 12'd110
`define H_Sync_Time 12'd40
`define H_Back_Porch 12'd220
`define H_Left_Border 12'd0

`define V_Total_Time 12'd750
`define V_Bottom_Border 12'd0
`define V_Front_Porch 12'd5
`define V_Sync_Time 12'd5
`define V_Back_Porch 12'd20
`define V_Top_Border 12'd0


`elsif Resolution_1920x1080
`define H_Total_Time 12'd2200
`define H_Right_Border 12'd0
`define H_Front_Porch 12'd88
`define H_Sync_Time 12'd44
`define H_Back_Porch 12'd148
`define H_Left_Border 12'd0

`define V_Total_Time 12'd1125
`define V_Bottom_Border 12'd0
`define V_Front_Porch 12'd4
`define V_Sync_Time 12'd5
`define V_Back_Porch 12'd36
`define V_Top_Border 12'd0


`endif

⑥VGA_CTRL.xdc

set_property IOSTANDARD LVCMOS33 [get_ports {VGA_RGB[15]}]
set_property IOSTANDARD LVCMOS33 [get_ports {VGA_RGB[14]}]
set_property IOSTANDARD LVCMOS33 [get_ports {VGA_RGB[13]}]
set_property IOSTANDARD LVCMOS33 [get_ports {VGA_RGB[12]}]
set_property IOSTANDARD LVCMOS33 [get_ports {VGA_RGB[11]}]
set_property IOSTANDARD LVCMOS33 [get_ports {VGA_RGB[10]}]
set_property IOSTANDARD LVCMOS33 [get_ports {VGA_RGB[9]}]
set_property IOSTANDARD LVCMOS33 [get_ports {VGA_RGB[8]}]
set_property IOSTANDARD LVCMOS33 [get_ports {VGA_RGB[7]}]
set_property IOSTANDARD LVCMOS33 [get_ports {VGA_RGB[6]}]
set_property IOSTANDARD LVCMOS33 [get_ports {VGA_RGB[5]}]
set_property IOSTANDARD LVCMOS33 [get_ports {VGA_RGB[4]}]
set_property IOSTANDARD LVCMOS33 [get_ports {VGA_RGB[3]}]
set_property IOSTANDARD LVCMOS33 [get_ports {VGA_RGB[2]}]
set_property IOSTANDARD LVCMOS33 [get_ports {VGA_RGB[1]}]
set_property IOSTANDARD LVCMOS33 [get_ports {VGA_RGB[0]}]
set_property IOSTANDARD LVCMOS33 [get_ports clk]
set_property IOSTANDARD LVCMOS33 [get_ports reset_n]
set_property IOSTANDARD LVCMOS33 [get_ports VGA_BLK]
set_property IOSTANDARD LVCMOS33 [get_ports TFT_BL]
set_property IOSTANDARD LVCMOS33 [get_ports VGA_CLK]
set_property IOSTANDARD LVCMOS33 [get_ports VGA_HS]
set_property IOSTANDARD LVCMOS33 [get_ports VGA_VS]
set_property PACKAGE_PIN W20 [get_ports {VGA_RGB[15]}]
set_property PACKAGE_PIN W19 [get_ports {VGA_RGB[14]}]
set_property PACKAGE_PIN V17 [get_ports {VGA_RGB[13]}]
set_property PACKAGE_PIN V16 [get_ports {VGA_RGB[12]}]
set_property PACKAGE_PIN T15 [get_ports {VGA_RGB[11]}]
set_property PACKAGE_PIN V20 [get_ports {VGA_RGB[10]}]
set_property PACKAGE_PIN U17 [get_ports {VGA_RGB[9]}]
set_property PACKAGE_PIN V18 [get_ports {VGA_RGB[8]}]
set_property PACKAGE_PIN T16 [get_ports {VGA_RGB[7]}]
set_property PACKAGE_PIN R16 [get_ports {VGA_RGB[6]}]
set_property PACKAGE_PIN U19 [get_ports {VGA_RGB[5]}]
set_property PACKAGE_PIN Y19 [get_ports {VGA_RGB[4]}]
set_property PACKAGE_PIN W18 [get_ports {VGA_RGB[3]}]
set_property PACKAGE_PIN Y18 [get_ports {VGA_RGB[2]}]
set_property PACKAGE_PIN W16 [get_ports {VGA_RGB[1]}]
set_property PACKAGE_PIN Y17 [get_ports {VGA_RGB[0]}]
set_property PACKAGE_PIN W14 [get_ports VGA_VS]
set_property PACKAGE_PIN U14 [get_ports VGA_HS]
set_property PACKAGE_PIN U15 [get_ports VGA_CLK]
set_property PACKAGE_PIN R17 [get_ports TFT_BL]
set_property PACKAGE_PIN U18 [get_ports clk]
set_property PACKAGE_PIN H18 [get_ports reset_n]
set_property PACKAGE_PIN W15 [get_ports VGA_BLK]

⑦VGA_cos

module VGA_cos(

input clk , //50MHZ时钟
input reset_n ,
output VGA_CLK,
output VGA_HS, //TFT行同步信号
output VGA_VS, //TFT场同步信号
output VGA_BLK, //VGA 场消隐信号
output [15:0] VGA_RGB ,//TFT数据输出
output TFT_BL //背光
);

assign TFT_BL = 1;

reg [15:0]disp_data;
wire [11:0]hcount;
wire [11:0]vcount;
wire Clk33M;
   wire Data_Req;


   assign VGA_CLK= Clk33M;

clk_vga vga_clk(
.clk_out1(Clk33M),
.clk_in1(clk)
);
VGA_CTRL VGA_CTRL_(
.clk(Clk33M), //系统输入时钟25MHZ
.reset_n(reset_n),
.data(disp_data), //待显示数据
       .data_req(Data_Req),
.H_addr(hcount), //VGA行扫描计数器
.V_addr(vcount), //VGA场扫描计数器
.VGA_HS(VGA_HS), //VGA行同步信号
.VGA_VS(VGA_VS), //VGA场同步信号
.VGA_BLK(VGA_BLK) , //VGA 场消隐信号
.VGA_RGB(VGA_RGB) //VGA数据输出
);

//定义颜色编码
localparam
BLACK = 16'h0000, //黑色
WHITE = 16'hFFFF; //白色

localparam
DOT = BLACK, //点是黑色
BACKGROUND = WHITE; //背景白色

wire R_all = vcount >= 0 && vcount < 480;
wire C_all = hcount >= 0 && hcount < 800;
wire BR = R_all & C_all;//底色全为白色


wire[11:0]dot ;

//这里是ROM，摸鱼怪又没改名字，嘎嘎嘎
blk_mem_gen_0 blk_mem_gen_0_(
.clka(Clk33M),
.ena(1'b1),
.addra(hcount), //
.douta(dot)
);

wire dotline = (vcount == dot) && hcount;

always@(*)
case({BR,dotline})
2'b10: disp_data = BACKGROUND;
2'b11: disp_data = DOT;
endcase


endmodule