Я пытаюсь написать модуль, который выполняет свертку на растровом изображении 24 на 24.
А вот DUT и testbench.
Возможно, есть некоторые проблемы, и я провожу пару часов, чтобы найти, в чем проблема, но я не могу понять.
Кроме того, RTL Anaylsis работает хорошо без каких-либо ошибок, что заставляет меня думать, что на DUT проблем нет.
есть кто-нибудь, кто может мне помочь?
module top_conv(clk,resetn,start,load_image_0,load_image_1,load_image_2,done,result);
input clk,resetn,load_image_0,load_image_1,load_image_2,start;
output done,result;
reg [1:0] st;
reg [1:0] nst;
reg [7:0] input_buffer_0 [0:2];
reg [7:0] input_buffer_1 [0:2];
reg [7:0] input_buffer_2 [0:2];
wire [7:0] load_image_0;
wire [7:0] load_image_1;
wire [7:0] load_image_2;
reg [7:0] result;
reg done;
integer load_cnt, row_cnt, col_cnt , result_cnt ;
parameter IDLE = 2'b00, LOAD = 2'b01, MAC = 2'b10, DONE = 2'b11;
always@(posedge clk or negedge resetn)begin
case(st)
LOAD:begin
input_buffer_0[load_cnt] <= load_image_0;
input_buffer_1[load_cnt] <= load_image_1;
input_buffer_2[load_cnt] <= load_image_2;
end
MAC:begin
input_buffer_0[0] <= input_buffer_0[1];
input_buffer_1[0] <= input_buffer_1[1];
input_buffer_2[0] <= input_buffer_2[1];
input_buffer_0[1] <= input_buffer_0[2];
input_buffer_1[1] <= input_buffer_0[2];
input_buffer_2[1] <= input_buffer_0[2];
input_buffer_0[2] <= load_image_0;
input_buffer_1[2] <= load_image_1;
input_buffer_2[2] <= load_image_2;
end
endcase
end
always@(posedge clk or negedge resetn)begin
if(!resetn) load_cnt <= 0;
else if(st == LOAD) load_cnt <= load_cnt + 1;
else load_cnt <= 0;
end
always@(posedge clk or negedge resetn)begin
if(!resetn) begin
col_cnt <= 0;
row_cnt <= 0;
end
else if(st == MAC) begin
if(col_cnt == 21) begin
col_cnt <= 0;
row_cnt <= row_cnt +1;
end
end
else begin
col_cnt <= 0;
row_cnt <= 0;
end
end
always@(posedge clk or negedge resetn)begin
if( st == MAC ) begin
result <= (input_buffer_0[0] + 2*input_buffer_0[1] + input_buffer_0[2])/16 + (input_buffer_1[0] + 2*input_buffer_1[1] + input_buffer_1[2])/8 + (input_buffer_2[0] + 2*input_buffer_2[1] + input_buffer_2[2])/16;
done <= 1'b1;
end
else done <=1'b0;
end
always@(posedge clk or negedge resetn)begin
if(!resetn) st <= 0;
else st <= nst;
end
always@(*)begin
case(st)
IDLE:begin
if(start) nst = LOAD;
else nst = IDLE;
end
LOAD:begin
if(load_cnt == 2)nst = MAC;
else nst = LOAD;
end
MAC:begin
if((row_cnt == 21)&&(col_cnt == 21)) nst = DONE;
else if(col_cnt == 21) nst = LOAD;
else nst = MAC;
end
DONE:begin
nst = IDLE;
end
endcase
end
endmodule
module testbench;
reg clk,resetn,start;
reg[7:0] val;
reg [7:0] b_load_image_0,g_load_image_0,r_load_image_0;
reg [7:0] b_load_image_1,g_load_image_1,r_load_image_1;
reg [7:0] b_load_image_2,g_load_image_2,r_load_image_2;
wire [2:0] done;
wire [7:0] b_result,g_result,r_result;
integer index;
top_conv blue_result (clk,resetn,start,b_load_image_0,b_load_image_1,b_load_image_2,done[0],b_result);
top_conv green_result (clk,resetn,start,g_load_image_0,g_load_image_1,g_load_image_2,done[1],g_result);
top_conv red_result (clk,resetn,start,r_load_image_0,r_load_image_1,r_load_image_2,done[2],r_result);
parameter read_fileName1 = "D:/blur_filter_unit/test.bmp" ;
localparam ARRAY_LEN = 24*24*3 + 54;
reg [7:0] data1 [0:ARRAY_LEN-1];
integer size,start_pos,width,height,bitcount;
task readBMP;
integer fileID1;
begin
fileID1 = $fopen(read_fileName1, "rb");
$display("%d" ,fileID1);
if(fileID1 == 0) begin
$display("Error: please check file path");
$finish;
end
else begin
$fread(data1, fileID1);
$fclose(fileID1);
size = {data1[5],data1[4],data1[3],data1[2]};
$display("size - %d", size);
start_pos = {data1[13],data1[12],data1[11],data1[10]};
$display("startpos : %d", start_pos);
width = {data1[21],data1[20],data1[19],data1[18]};
height = {data1[25],data1[24],data1[23],data1[22]};
$display("width - %d; height - %d",width,height);
bitcount = {data1[29],data1[28]};
if(bitcount != 24) begin
$display("Error: Please check the image file. It may be corrupted");
end
if(width%4)begin
$display("width is not suitable");
$finish;
end
end
end
endtask
integer i,j;
localparam RESULT_ARRAY_LEN = 24*24*3;
reg[7:0] result[0:RESULT_ARRAY_LEN - 1];
always @(posedge clk or negedge resetn)begin
if(!resetn)begin
j <= 8'b0;
end
else begin
if(&done[2:0]) begin
result[j] <= b_result;
result[j+1] <= g_result;
result[j+2] <= r_result;
j <= j+3;
end
end
end
parameter write_fileName1 = "D:/blur_filter_unit/result.bmp";
task writeBMP;
integer fileID, k;
begin
fileID = $fopen(write_fileName1,"wb");
for(k = 0; k < start_pos; k=k+1)begin
$fwrite(fileID, "%c",data1[k]);
end
for(k = start_pos; k<size; k=k+1)begin
$fwrite(fileID,"%c",result[k-start_pos]);
end
$fclose(fileID);
$display("Result.bmp is generated \n");
end
endtask
always begin
#1 clk = ~clk;
end
initial begin
clk = 1;
resetn = 0;
start = 0;
index = 1;
b_load_image_0 = 0;
g_load_image_0 = 0;
r_load_image_0 = 0;
b_load_image_1 = 0;
g_load_image_1 = 0;
r_load_image_1 = 0;
b_load_image_2 = 0;
g_load_image_2 = 0;
r_load_image_2 = 0;
readBMP;
#10;
resetn = 1;
start = 1;
for(i = start_pos; i<size; i=i+3)begin
{r_load_image_0, r_load_image_1, r_load_image_2} ={data1[i+2],data1[i+2+width*3],data1[i+2+width*6]};
{g_load_image_0, g_load_image_1, g_load_image_2} = {data1[i+1],data1[i+1+width*3],data1[i+1+width*6]};
{b_load_image_0, b_load_image_1, b_load_image_2} = {data1[i],data1[i+width*3],data1[i+width*6]};
#1;
end
#10;
#writeBMP;
#10
$stop;
end
endmodule