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RGB Resampler IP核的测试
关于RGB Resampler IP核的测试
1.RGB Resampler功能描述
将输入的RGB数据流转换成其它格式的RGB数据流。
2.功能验证
设置源图像像素数据为：3X4格式。
设置RGB Resampler参数如下图所示，将24-bit RGB格式转换为40-bit RGBA格式。
顶层文件的编写：
1 module top( 2 clk_clk, 3 reset_reset_n, 4 video_rgb_resampler_avalon_rgb_source_ready, 5 video_rgb_resampler_avalon_rgb_source_startofpacket, 6 video_rgb_resampler_avalon_rgb_source_endofpacket, 7 video_rgb_resampler_avalon_rgb_source_valid, 8 video_rgb_resampler_avalon_rgb_source_data, 9 ); 10 11 input clk_clk; 12 input reset_reset_n; 13 input video_rgb_resampler_avalon_rgb_source_ready; 14 output video_rgb_resampler_avalon_rgb_source_startofpacket; 15 output video_rgb_resampler_avalon_rgb_source_endofpacket; 16 output video_rgb_resampler_avalon_rgb_source_valid; 17 output [39:0]video_rgb_resampler_avalon_rgb_source_data; 18 19 RGB_format u1 ( 20 .clk_clk (clk_clk), 21 .reset_reset_n (reset_reset_n), 22 .video_rgb_resampler_avalon_rgb_source_ready (video_rgb_resampler_avalon_rgb_source_ready), 23 .video_rgb_resampler_avalon_rgb_source_startofpacket (video_rgb_resampler_avalon_rgb_source_startofpacket), 24 .video_rgb_resampler_avalon_rgb_source_endofpacket (video_rgb_resampler_avalon_rgb_source_endofpacket), 25 .video_rgb_resampler_avalon_rgb_source_valid (video_rgb_resampler_avalon_rgb_source_valid), 26 .video_rgb_resampler_avalon_rgb_source_data (video_rgb_resampler_avalon_rgb_source_data) 27 ); 28 29 endmodule
Testbench的编写：
initial begin reset_reset_n = 0; #10; reset_reset_n = 1; clk_clk = 1; forever #10 clk_clk = ~clk_clk; end always@(posedge clk_clk or negedge reset_reset_n) if(!reset_reset_n) video_rgb_resampler_avalon_rgb_source_ready = 1‘b0; else video_rgb_resampler_avalon_rgb_source_ready = 1‘b1;
ModelSIM仿真波形：
波形分析： 输出source_data为40-bit,在start---end之间输出12个数据。
3.将224X224 24-bit RGB图像转换为40-bit RGBA 图像
参数配置：
modelsim仿真并导出modelsim中生成的图像像素数据：
integer w_file; initial w_file = $fopen("video_rgb_resampler_avalon_rgb_source_data.txt"); always@(posedge clk_clk) $fdisplay(w_file, "%d", video_rgb_resampler_avalon_rgb_source_data);
40-bit RGBA数据格式：
在Matlab中进行数据处理：
fd = fopen(‘video_rgb_resampler_avalon_rgb_source_data.txt‘);
A =uint64(fscanf(fd,‘%f‘));
fclose(fd);
B = uint64(zeros(224,224));
A1 = uint64(zeros(50176,1));
A2 = uint64(zeros(50176,1));
A3 = uint64(zeros(224,224));
R1 = uint64(zeros(50176,1));
R2 = uint64(zeros(50176,1));
R3 = uint64(zeros(224,224));
G1 = uint64(zeros(50176,1));
G2 = uint64(zeros(50176,1));
G3 = uint64(zeros(224,224));
B1 = uint64(zeros(50176,1));
B2 = uint64(zeros(224,224));
for j = 1:224
for i = 1:224
B(j,i) = A((j-1)*224+i);
end
end
% A---1111 1111 11 --- 0000 0000 00 --- 0000 0000 00 --- 0000 0000 00
% R---0000 0000 00 --- 1111 1111 11 --- 0000 0000 00 --- 0000 0000 00
% G---0000 0000 00 --- 0000 0000 00 --- 1111 1111 11 --- 0000 0000 00
% B---0000 0000 00 --- 0000 0000 00 --- 0000 0000 00 --- 1111 1111 11
a = uint64(bin2dec(‘1111111111000000000000000000000000000000‘));
r = uint64(bin2dec(‘0000000000111111111100000000000000000000‘));
g = uint64(bin2dec(‘0000000000000000000011111111110000000000‘));
b = uint64(bin2dec(‘0000000000000000000000000000001111111111‘));
%---A
for i = 1:50176
A1(i) = bitand(A(i),a);
end
for i = 1:50176
A2(i) = bitshift(A1(i),-30);
end
for j = 1:224
for i = 1:224
A3(j,i) = A2((j-1)*224+i);
end
end
%---R
for i = 1:50176
R1(i) = bitand(A(i),r);
end
for i = 1:50176
R2(i) = bitshift(R1(i),-20);
end
for j = 1:224
for i = 1:224
R3(j,i) = R2((j-1)*224+i);
end
end
%---G
for i = 1:50176
G1(i) = bitand(A(i),g);
end
for i = 1:50176
G2(i) = bitshift(G1(i),-10);
end
for j = 1:224
for i = 1:224
G3(j,i) = G2((j-1)*224+i);
end
end
%---B
for i = 1:50176
B1(i) = bitand(A(i),b);
end
for j = 1:224
for i = 1:224
B2(j,i) = B1((j-1)*224+i);
end
end
需要注意的问题：
源文件中的数据值比较大，如果以十进制的方式读入数据，会出现如下问题：
如果以16进制的形式读入，则不会出现此问题：
RGB Resampler IP核的测试
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