DVP verilog

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相关问题

DVP时序解析模块verilog

DVP时序解析模块（Digital Video Port Timing Parsing Module）是用于数字视频接口（Digital Video Port）的时序解析的模块。它将DVP时序信号进行解析，以获得各种视频信号的时序参数，如行数、场数、帧率、数据位宽等。

以下是一个简单的DVP时序解析模块的Verilog代码示例：

module dvp_timing_parser(
    input clk,
    input rstn,
    input dvp_pclk,
    input dvp_vsync,
    input dvp_href,
    output reg [11:0] hcount,
    output reg [10:0] vcount,
    output reg [1:0] field,
    output reg [6:0] data_width,
    output reg [31:0] pixel_count
);

reg [1:0] state;
reg [11:0] count;

parameter IDLE = 2'b00;
parameter HACTIVE = 2'b01;
parameter HBLANK = 2'b10;
parameter VSYNC = 2'b11;

always @(posedge clk or negedge rstn) begin
    if (!rstn) begin
        state <= IDLE;
        count <= 12'd0;
        hcount <= 12'd0;
        vcount <= 11'd0;
        field <= 2'd0;
        data_width <= 7'd0;
        pixel_count <= 32'd0;
    end else begin
        case (state)
            IDLE: begin
                if (dvp_vsync == 1'b0) begin
                    state <= VSYNC;
                    count <= 12'd0;
                end
            end
            VSYNC: begin
                if (dvp_vsync == 1'b1) begin
                    state <= HBLANK;
                    count <= 12'd0;
                end
            end
            HBLANK: begin
                if (dvp_href == 1'b1) begin
                    state <= HACTIVE;
                    count <= 12'd0;
                end
            end
            HACTIVE: begin
                if (dvp_href == 1'b0) begin
                    hcount <= count;
                    state <= HBLANK;
                    count <= 12'd0;
                    if (vcount == 10'd0) begin
                        field <= ~field;
                    end
                end else begin
                    count <= count + 12'd1;
                end
            end
        endcase
        if (state == VSYNC) begin
            vcount <= count;
        end
        if (dvp_pclk == 1'b0 && count == 12'd0) begin
            data_width <= 7'd0;
            pixel_count <= 32'd0;
        end else if (dvp_pclk == 1'b1 && count > 12'd0 && count < 12'd8) begin
            data_width <= dvp_data;
        end else if (dvp_pclk == 1'b1 && count >= 12'd8) begin
            pixel_count <= pixel_count + 32'd1;
        end
    end
end

endmodule

该模块通过有限状态机（FSM）的方式对DVP信号进行时序解析，得到各种视频信号的时序参数。其中，模块输入包括DVP的像素时钟（dvp_pclk）、垂直同步信号（dvp_vsync）和水平参考信号（dvp_href）等，输出包括行数（hcount）、场数（vcount）、帧率（field）、数据位宽（data_width）和像素计数（pixel_count）等。

camera DVP spec

DVP (Digital Video Port) is a type of interface used to connect cameras and other video devices to digital processors or microcontrollers. The DVP interface typically consists of a set of data lines and control signals, and supports video data transfer in a variety of formats, such as YUV, RGB, and RAW.

The DVP interface specification may vary depending on the specific camera or video device. Some common specifications of the DVP interface include the number of data lines, the bit width of the data bus, the clock frequency, and the electrical characteristics of the interface signals.

Some typical specifications of the DVP interface for a camera may include:

- Number of data lines: 8, 10, or 12
- Bit width of the data bus: 8, 10, or 12 bits
- Clock frequency: up to several hundred megahertz
- Signal voltage levels: typically 1.8V or 2.8V
- Signal timing: defined by specific camera or video device

Overall, the DVP interface provides a high-speed, low-latency connection between cameras and digital processors, making it a popular choice for many video applications.