verilog hdmi代码
时间: 2023-07-02 12:04:50 浏览: 59
下面是一个简单的Verilog HDIM代码示例,用于将图像数据发送到HDMI显示器。注意,此代码示例仅包括基本的HDMI信号生成器,它不包括任何图像处理逻辑。
```
`timescale 1ns / 1ps
module hdmi_generator (
input clk,
input rstn,
input [7:0] pixel_data,
output reg hsync,
output reg vsync,
output reg [11:0] hdmi_data
);
// Timing parameters
parameter H_DISPLAY = 640;
parameter H_FRONT_PORCH = 16;
parameter H_SYNC_WIDTH = 96;
parameter H_BACK_PORCH = 48;
parameter V_DISPLAY = 480;
parameter V_FRONT_PORCH = 10;
parameter V_SYNC_WIDTH = 2;
parameter V_BACK_PORCH = 33;
// Internal counters
reg [9:0] h_counter;
reg [9:0] v_counter;
// Horizontal sync
always @ (posedge clk)
begin
if (!rstn) begin
hsync <= 1'b0;
h_counter <= 0;
end
else begin
if (h_counter >= H_DISPLAY+H_FRONT_PORCH+H_SYNC_WIDTH+H_BACK_PORCH-1)
h_counter <= 0;
else
h_counter <= h_counter + 1;
if (h_counter >= H_DISPLAY+H_FRONT_PORCH && h_counter < H_DISPLAY+H_FRONT_PORCH+H_SYNC_WIDTH)
hsync <= 1'b0;
else
hsync <= 1'b1;
end
end
// Vertical sync
always @ (posedge clk)
begin
if (!rstn) begin
vsync <= 1'b0;
v_counter <= 0;
end
else begin
if (v_counter >= V_DISPLAY+V_FRONT_PORCH+V_SYNC_WIDTH+V_BACK_PORCH-1)
v_counter <= 0;
else
v_counter <= v_counter + 1;
if (v_counter >= V_DISPLAY+V_FRONT_PORCH && v_counter < V_DISPLAY+V_FRONT_PORCH+V_SYNC_WIDTH)
vsync <= 1'b0;
else
vsync <= 1'b1;
end
end
// HDMI data
always @ (posedge clk)
begin
if (!rstn)
hdmi_data <= 0;
else begin
if (h_counter >= H_DISPLAY+H_FRONT_PORCH && v_counter >= V_DISPLAY+V_FRONT_PORCH)
hdmi_data <= pixel_data;
else
hdmi_data <= 12'h000;
end
end
endmodule
```