MATLAB代码
% 参数设置
N = 4096; % 数据点数量
t = linspace(0, 2*pi, N); % 时间向量
width = 12; % 位宽% 正弦波，幅度在0到5之间
sine_wave = 2.5 * sin(t) + 2.5;% 三角波，幅度在0到5之间
tri_wave = 5 * (1 - abs(mod(t/(2*pi)*4, 2) - 1));% 方波，幅度在0到5之间
square_wave = 2.5 * (square(t) + 1); % 将范围调整为0到5之间% 将波形数据保存为COE文件
save_to_coe('sine_wave.coe', sine_wave, width);
save_to_coe('tri_wave.coe', tri_wave, width);
save_to_coe('square_wave.coe', square_wave, width);% 读取并绘制正弦波
sine_wave_data = read_coe('sine_wave.coe', N, width);
figure;
plot(sine_wave_data);
title('Sine Wave');
xlabel('Sample');
ylabel('Amplitude');% 读取并绘制三角波
tri_wave_data = read_coe('tri_wave.coe', N, width);
figure;
plot(tri_wave_data);
title('Triangle Wave');
xlabel('Sample');
ylabel('Amplitude');% 读取并绘制方波
square_wave_data = read_coe('square_wave.coe', N, width);
figure;
plot(square_wave_data);
title('Square Wave');
xlabel('Sample');
ylabel('Amplitude');% 函数：保存为COE文件
function save_to_coe(filename, data, width)% 打开文件fid = fopen(filename, 'w');% 写入COE文件头部fprintf(fid, 'memory_initialization_radix=16;\n');fprintf(fid, 'memory_initialization_vector=\n');% 写入数据for i = 1:length(data)if i == length(data)fprintf(fid, '%X;\n', round(data(i) * (2^width - 1) / 5)); % 最后一行以分号结尾elsefprintf(fid, '%X,\n', round(data(i) * (2^width - 1) / 5));endend% 关闭文件fclose(fid);
end% 函数：从COE文件中读取数据
function data = read_coe(filename, depth, width)% 打开COE文件fid = fopen(filename, 'r');% 跳过文件头部信息while trueline = fgetl(fid);if contains(line, 'memory_initialization_vector=')break;endend% 初始化数据数组data = zeros(1, depth);% 读取数据部分i = 1;while i <= depthline = fgetl(fid);if line(end) == ';'line(end) = []; % 去掉分号endvalues = strsplit(line, ',');for j = 1:length(values)hex_value = strtrim(values{j});if ~isempty(hex_value) % 确保值不为空data(i) = hex2dec(hex_value) * 5 / (2^width - 1);i = i + 1;endendend% 关闭文件fclose(fid);
end
运行结果
