在quartus中将彩色图片输出为灰度图像并通过VGA显示到液晶屏上的代码
时间: 2024-02-03 08:12:13 浏览: 38
以下是一个将彩色图片输出为灰度图像并通过VGA显示到液晶屏上的Quartus代码:
```
module VGA_Controller(
input clk, reset_n,
input [7:0] r_in, g_in, b_in,
output [3:0] vga_red, vga_green, vga_blue,
output hsync, vsync
);
// VGA timing constants
parameter H_DISPLAY = 640;
parameter H_FRONT_PORCH = 16;
parameter H_SYNC = 96;
parameter H_BACK_PORCH = 48;
parameter V_DISPLAY = 480;
parameter V_FRONT_PORCH = 10;
parameter V_SYNC = 2;
parameter V_BACK_PORCH = 33;
reg [9:0] h_count = 0;
reg [9:0] v_count = 0;
// Horizontal timing state machine
reg [1:0] h_state = 0;
always @(posedge clk) begin
if (reset_n == 0) begin
h_count <= 0;
h_state <= 0;
hsync <= 1;
vga_red <= 0;
vga_green <= 0;
vga_blue <= 0;
end else begin
case (h_state)
0: begin // Horizontal front porch
if (h_count == H_FRONT_PORCH - 1) begin
h_count <= 0;
h_state <= 1;
end else begin
h_count <= h_count + 1;
end
end
1: begin // Horizontal display
if (h_count == H_DISPLAY - 1) begin
h_count <= 0;
h_state <= 2;
end else begin
h_count <= h_count + 1;
// Convert RGB to grayscale
vga_red <= (r_in * 0.3) + (g_in * 0.59) + (b_in * 0.11);
vga_green <= vga_red;
vga_blue <= vga_red;
end
end
2: begin // Horizontal sync
if (h_count == H_SYNC - 1) begin
h_count <= 0;
h_state <= 3;
hsync <= 0;
end else begin
h_count <= h_count + 1;
end
end
3: begin // Horizontal back porch
if (h_count == H_BACK_PORCH - 1) begin
h_count <= 0;
h_state <= 0;
hsync <= 1;
end else begin
h_count <= h_count + 1;
end
end
endcase
end
end
// Vertical timing state machine
reg [1:0] v_state = 0;
always @(posedge clk) begin
if (reset_n == 0) begin
v_count <= 0;
v_state <= 0;
vsync <= 1;
end else begin
case (v_state)
0: begin // Vertical front porch
if (v_count == V_FRONT_PORCH - 1) begin
v_count <= 0;
v_state <= 1;
end else begin
v_count <= v_count + 1;
end
end
1: begin // Vertical display
if (v_count == V_DISPLAY - 1) begin
v_count <= 0;
v_state <= 2;
end else begin
v_count <= v_count + 1;
end
end
2: begin // Vertical sync
if (v_count == V_SYNC - 1) begin
v_count <= 0;
v_state <= 3;
vsync <= 0;
end else begin
v_count <= v_count + 1;
end
end
3: begin // Vertical back porch
if (v_count == V_BACK_PORCH - 1) begin
v_count <= 0;
v_state <= 0;
vsync <= 1;
end else begin
v_count <= v_count + 1;
end
end
endcase
end
end
endmodule
```
这个代码包含一个VGA控制器模块,它接受一个RGB颜色输入,并输出一个灰度的VGA信号以显示在液晶屏上。该模块使用一个状态机来控制水平和垂直同步信号,并且将RGB颜色值转换为灰度值。你需要在代码中调整VGA的分辨率以适应你的液晶屏,并且根据你的需要调整颜色转换方法。
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