process_input_waveform.m

安捷仑的数字调制信号发生器E4438用于很多通信系统的开发过程中。本代码可以用于通过网络接口或GPIB接口向E4438下载被调制数据

%=============================================================================
%
% LTD DSP Software Schaumburg, IL.
%
% COPYRIGHT 2006 Motorola, Inc.
%
%     All Rights Reserved
%
%------------------------------- Module Name ---------------------------------
% 
% Module Name: process_input_waveform.m
% 
% Original Author: Michael Laginess
% 
% Date of Origin (MM/DD/YY): 07/12/2006
% 
%-------------------------------- Revisions ----------------------------------
% 
% Person Date Comments
% 
% 07/12/2006 - laginess - created
% 
%----------------------- Detailed Design Description -------------------------
%
% Accepts input wavefile in ASCII format. Converts wavefile to a string of 
% input bits. Sends converted waveform to ESG for execution.
%
% Assumptions:
%     File format consists of data in ASCII hex.
%
% Inputs:
%   input_wavefile_name - name of file where input filelist is stored.
%       0 = 'default_wavefile_list.txt'
%   esg_gpib_addr - GPIB address of ESG
%
% Notes:
%   Input Wavefile Format:
%       The following is the format used for the input wavefile. This
%       format MUST be followed for the process_input_waveform function to
%       operate. Note that the filenames themselves are not limited to the
%       format in the below example and are not case sensitive.
%
%       Example: default_wavefile_list.txt
%       |---------------------------------------------------------------|
%       input_test_filename_1.txt
%       ESG_WAVEFILE_NAME_1
%       input_test_filename_2.txt
%       ESG_WAVEFILE_NAME_2
%       etc...
%       |---------------------------------------------------------------|
%
% Outputs:
%   Wavefiles listed in the input file will be loaded onto the ESG
%
%=============================================================================
function process_input_waveform(input_wavefile_name, esg_gpib_addr)

if input_wavefile_name == 0
    input_wavefile_name = 'default_wavefile_list.txt';
end

%=============================================================================
% Open file
%=============================================================================
fid = fopen(input_wavefile_name, 'r');

%=============================================================================
% Read data
%=============================================================================

% read entire ASCII file
file_input_data = fread(fid, 'uchar');
fclose(fid);

% make sure input data is 1 row
[ nr, nc ] = size(file_input_data);
ascii_input_data = reshape(file_input_data, 1, nr*nc);

%Initialize the file character markers
j=1;
k=1;
%Step through all the characters in the file and pull out the file names,
%which are seperated by the carriage return sequence(13 10). The file names
%are stored row by row, character by character.
for i=1:nr
    if ascii_input_data(i) ~= 13
        if ascii_input_data(i) ~= 10
            filename_char_array(j,k) = ascii_input_data(i);
            k = k+1;
        end
    else
        j = j+1;
        k = 1;
    end
end
%The rows of file name characters are condensed to single cells.
filename_char_array = char(filename_char_array);
filename_cell_array = cellstr(filename_char_array);

number_of_filenames = size(filename_cell_array);

%For every file listed, send the contents to the ESG with the user defined
%filename and slot setup.

% get dirname of input wave filename
[ input_file_dir filename ext ] = fileparts(input_wavefile_name);

for i=1:2:number_of_filenames(1),
    % assume all files are in same dir as input_wavefile_name
    waveform_pathname = [ input_file_dir '/' char(filename_cell_array(i)) ];
    esg_input_payload = read_input_payload(waveform_pathname);
    write_waveform_to_esg(esg_gpib_addr,char(filename_cell_array(i+1)),esg_input_payload,1);
end
    
%=============================================================================
% Close files
%=============================================================================
fclose(fid);