Processing video images, using the xilinx v5 board, when the 964*625 camera output, the effective pixel area 768*576,, after using the following code, every time the program, the video output from the board has a row and column deviation, every time Different.
Ask, how to use your own counter to make the output of the board consistent with that when it does not pass through the board. (If you directly use wire assign definition for lval fval cameralink, it can be satisfied)
Attached code:
module cameralink(
clk,
rst_n,
fval,
lval,
// dval,
cameralink_A,
clk_out,
fval_out,
lval_out,
cameralink_B
);
input clk;
input rst_n;
input fval;
input lval;
// input dval;
input [7:0]cameralink_A;
output clk_out;
output fval_out;
output lval_out;
output cameralink_B;
wire clk_out;
assign clk_out=clk;
reg [7:0] video_in_data_r;
reg [7:0] video_out_data_r;
/*************************Counting and decoding module********************* ************/
reg [9:0] pix_in_x_cnt; //964, 8+ 768+ 188 768 pixels per line
reg [9:0] pix_in_y_cnt; //625, 11+ 576+ 38 576 lines of pixels in one frame
//fval line 29 to 600 is line 1, the rest is 0, there are 625 lines in one frame
//Lval Columns 20 to 842 are 1, and the rest are 0, a total of 964 rows
always @ (posedge clk )begin
if(!rst_n)
pix_in_x_cnt <= 10'd0;
else begin
if(pix_in_x_cnt == 10'd964)
pix_in_x_cnt <= 10'd0;
else
pix_in_x_cnt <= pix_in_x_cnt+1'b1;
end
end
always @ (posedge clk )begin
if(!rst_n)
pix_in_y_cnt <= 10'd0;
else begin
if(pix_in_y_cnt == 10'd625)
pix_in_y_cnt <= 10'd0;
else begin
if(pix_in_x_cnt == 10'd964)
pix_in_y_cnt <= pix_in_y_cnt+1'b1;
end
end
end
wire dval; //effective pixel area
assign dval=((pix_in_x_cnt>=10'd27)&&(pix_in_x_cnt<=10'd794))&&((pix_in_y_cnt>=10'd33)&&(pix_in_y_cnt<=10'd608));
always @ (posedge clk )begin
if(!rst_n)begin
video_in_data_r<=8'd0;
end
else begin
if(dval)begin
video_in_data_r<=cameralink_A;
end
end
end
/*************************Algorithm processing module********************* ************/
/*************************Counting coding module********************* ************/
reg [9:0] pix_out_x_cnt; //964, 8+ 768+ 188 768 pixels in a row
reg [9:0] pix_out_y_cnt; //625, 11+ 576+ 38 576 lines of pixels in one frame
//fval line 29 to 620 is line 1, the rest is 0, there are 625 lines in one frame
//Lval Columns 20 to 842 are 1, and the rest are 0, a total of 964 rows
wire frame_end_flag;
assign frame_end_flag=((pix_in_x_cnt == 10'd0)&&(pix_in_y_cnt == 10'd0));
always @ (posedge clk)begin
if(!rst_n)
pix_out_x_cnt <= 10'd0;
else begin
if((pix_out_x_cnt == 10'd964)|| (frame_end_flag))
pix_out_x_cnt <= 10'd0;
else
pix_out_x_cnt <= pix_out_x_cnt+1'b1;
end
end
always @ (posedge clk )begin
if(!rst_n)
pix_out_y_cnt <= 10'd0;
else begin
if((pix_out_y_cnt == 10'd625)|| (frame_end_flag))
pix_out_y_cnt <= 10'd0;
else if(pix_out_x_cnt == 10'd964)
pix_out_y_cnt <= pix_out_y_cnt+1'b1;
end
end
wire fval_out;
assign fval_out=((pix_out_y_cnt>=10'd28)&&(pix_out_y_cnt<=10'd619));//Initial
// assign fval_out=fval;
wire lval_out;
assign lval_out=((pix_out_x_cnt>=10'd19)&&(pix_out_x_cnt<=10'd841));
// assign lval_out=lval;
wire pix_en_dis; //Effective pixel area
assign pix_en_dis=((pix_out_x_cnt>=10'd27)&&(pix_out_x_cnt<=10'd794))&&((pix_out_y_cnt>=10'd33)&&(pix_out_y_cnt<=10'd608));
wire [7:0] cameralink_B;
reg [7:0] cameralink_B_r;
assign cameralink_B=cameralink_B_r;
always @ (posedge clk )begin
if(!rst_n)
begin
cameralink_B_r<=8'd0;
end
else begin
if(pix_en_dis)
begin
//cameralink_B_r<=video_out_data_r;
cameralink_B_r<=video_in_data_r;
end
else
cameralink_B_r<=8'd0;
end
end
endmodule
