DCMI inteface

AVR_DCMI.c

#include <avr/io.h>
#include <avr/interrupt.h>

#define PIXEL_WIDTH 8
#define IMAGE_WIDTH 640
#define IMAGE_HEIGHT 480

volatile uint8_t pixel_count = 0;
volatile uint8_t line_count = 0;
volatile uint8_t frame_count = 0;

uint8_t image_buffer[IMAGE_HEIGHT][IMAGE_WIDTH];
uint8_t pixel_data = 0;

void setup() {
    // Set PORTB pins as output
    DDRB = 0xFF;

    // Set up Timer1 for pixel clock
    TCCR1A = 0;
    TCCR1B = (1 << CS10);
    TIMSK1 = (1 << TOIE1);

    // Enable interrupts
    sei();
}

void loop() {
    // Your main program logic here
}

ISR(TIMER1_OVF_vect) {
    if (pixel_count >= IMAGE_WIDTH) {
        pixel_count = 0;
        line_count++;

        if (line_count >= IMAGE_HEIGHT) {
            line_count = 0;
            frame_count++;
        }
    }

    if (frame_count == 0 && line_count == 0 && pixel_count == 0) {
        // Start of a new frame
        // Your code here
    } else if (frame_count > 0 && line_count == 0 && pixel_count == 0) {
        // Start of a new line
        // Your code here
    } else {
        // Capture pixel data
        if (line_count < IMAGE_HEIGHT && pixel_count < IMAGE_WIDTH) {
            image_buffer[line_count][pixel_count] = pixel_data;
        }
        pixel_count++;
    }

    // Output image data
    if (line_count < IMAGE_HEIGHT && pixel_count < IMAGE_WIDTH) {
        PORTB = image_buffer[line_count][pixel_count];
    } else {
        PORTB = 0;
    }
}

DCMI.verilog

module DCMI_Controller (
    input wire clk,
    input wire reset,
    input wire dcmi_pclk,
    input wire dcmi_vsync,
    input wire dcmi_hsync,
    input wire [7:0] dcmi_data,
    output wire [7:0] image_data
);

    parameter PIXEL_WIDTH = 8;
    parameter IMAGE_WIDTH = 640;
    parameter IMAGE_HEIGHT = 480;

    reg [PIXEL_WIDTH-1:0] pixel_count;
    reg [8:0] line_count;
    reg [8:0] frame_count;

    reg [7:0] image_buffer [0:IMAGE_HEIGHT-1][0:IMAGE_WIDTH-1];
    reg [7:0] pixel_data;

    always @(posedge clk) begin
        if (reset) begin
            pixel_count <= 0;
            line_count <= 0;
            frame_count <= 0;
        end else begin
            if (dcmi_pclk && dcmi_vsync && dcmi_hsync) begin
                // Start of a new frame
                frame_count <= frame_count + 1;
                line_count <= 0;
                pixel_count <= 0;
            end else if (dcmi_pclk && dcmi_vsync) begin
                // Start of a new line
                line_count <= line_count + 1;
                pixel_count <= 0;
            end else if (dcmi_pclk) begin
                // Capture pixel data
                if (line_count < IMAGE_HEIGHT && pixel_count < IMAGE_WIDTH) begin
                    image_buffer[line_count][pixel_count] <= dcmi_data;
                end
                pixel_count <= pixel_count + 1;
            end
        end
    end

    always @(posedge clk) begin
        if (reset) begin
            image_data <= 0;
        end else begin
            if (line_count < IMAGE_HEIGHT && pixel_count < IMAGE_WIDTH) begin
                image_data <= image_buffer[line_count][pixel_count];
            end else begin
                image_data <= 0;
            end
        end
    end

endmodule