| Line 26... |
Line 26... |
// Creator: Dan Gisselquist, Ph.D.
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// Creator: Dan Gisselquist, Ph.D.
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// Gisselquist Technology, LLC
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// Gisselquist Technology, LLC
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//
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//
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////////////////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////////////////
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//
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//
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// Copyright (C) 2015, Gisselquist Technology, LLC
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// Copyright (C) 2015-2016, Gisselquist Technology, LLC
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//
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//
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// This program is free software (firmware): you can redistribute it and/or
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// This program is free software (firmware): you can redistribute it and/or
|
// modify it under the terms of the GNU General Public License as published
|
// modify it under the terms of the GNU General Public License as published
|
// by the Free Software Foundation, either version 3 of the License, or (at
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// by the Free Software Foundation, either version 3 of the License, or (at
|
// your option) any later version.
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// your option) any later version.
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| Line 141... |
Line 141... |
} ROUND_T;
|
} ROUND_T;
|
|
|
const char cpyleft[] =
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const char cpyleft[] =
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"////////////////////////////////////////////////////////////////////////////////\n"
|
"////////////////////////////////////////////////////////////////////////////////\n"
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"//\n"
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"//\n"
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"// Copyright (C) 2015, Gisselquist Technology, LLC\n"
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"// Copyright (C) 2015-2016, Gisselquist Technology, LLC\n"
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"//\n"
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"//\n"
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"// This program is free software (firmware): you can redistribute it and/or\n"
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"// This program is free software (firmware): you can redistribute it and/or\n"
|
"// modify it under the terms of the GNU General Public License as published\n"
|
"// modify it under the terms of the GNU General Public License as published\n"
|
"// by the Free Software Foundation, either version 3 of the License, or (at\n"
|
"// by the Free Software Foundation, either version 3 of the License, or (at\n"
|
"// your option) any later version.\n"
|
"// your option) any later version.\n"
|
| Line 2239... |
Line 2239... |
// "\tfftgen -i\n"
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// "\tfftgen -i\n"
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"\t-1\tBuild a normal FFT, running at one clock per complex sample, or (for\n"
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"\t-1\tBuild a normal FFT, running at one clock per complex sample, or (for\n"
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"\t\ta real FFT) at one clock per two real input samples.\n"
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"\t\ta real FFT) at one clock per two real input samples.\n"
|
"\t-c <cbits>\tCauses all internal complex coefficients to be\n"
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"\t-c <cbits>\tCauses all internal complex coefficients to be\n"
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"\t\tlonger than the corresponding data bits, to help avoid\n"
|
"\t\tlonger than the corresponding data bits, to help avoid\n"
|
"\t\tcoefficient truncation errors. The default is %d bits lnoger\n"
|
"\t\tcoefficient truncation errors. The default is %d bits longer\n"
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"\t\tthan the data bits.\n"
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"\t\tthan the data bits.\n"
|
"\t-d <dir>\tPlaces all of the generated verilog files into <dir>.\n"
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"\t-d <dir>\tPlaces all of the generated verilog files into <dir>.\n"
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"\t\tThe default is a subdirectory of the current directory named %s.\n"
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"\t\tThe default is a subdirectory of the current directory named %s.\n"
|
"\t-f <size>\tSets the size of the FFT as the number of complex\n"
|
"\t-f <size>\tSets the size of the FFT as the number of complex\n"
|
"\t\tsamples input to the transform. (No default value, this is\n"
|
"\t\tsamples input to the transform. (No default value, this is\n"
|
| Line 2659... |
Line 2659... |
fprintf(vmain, "// i_clk\tThe clock. All operations are synchronous with this clock.\n");
|
fprintf(vmain, "// i_clk\tThe clock. All operations are synchronous with this clock.\n");
|
fprintf(vmain, "//\ti_rst\tSynchronous reset, active high. Setting this line will\n");
|
fprintf(vmain, "//\ti_rst\tSynchronous reset, active high. Setting this line will\n");
|
fprintf(vmain, "//\t\t\tforce the reset of all of the internals to this routine.\n");
|
fprintf(vmain, "//\t\t\tforce the reset of all of the internals to this routine.\n");
|
fprintf(vmain, "//\t\t\tFurther, following a reset, the o_sync line will go\n");
|
fprintf(vmain, "//\t\t\tFurther, following a reset, the o_sync line will go\n");
|
fprintf(vmain, "//\t\t\thigh the same time the first output sample is valid.\n");
|
fprintf(vmain, "//\t\t\thigh the same time the first output sample is valid.\n");
|
fprintf(vmain, "// i_ce\tA clock enable line. If this line is set, this module\n");
|
fprintf(vmain, "//\ti_ce\tA clock enable line. If this line is set, this module\n");
|
fprintf(vmain, "//\t\t\twill accept two complex values as inputs, and produce\n");
|
fprintf(vmain, "//\t\t\twill accept two complex values as inputs, and produce\n");
|
fprintf(vmain, "//\t\t\ttwo (possibly empty) complex values as outputs.\n");
|
fprintf(vmain, "//\t\t\ttwo (possibly empty) complex values as outputs.\n");
|
fprintf(vmain, "//\t\ti_left\tThe first of two complex input samples. This value\n");
|
fprintf(vmain, "//\ti_left\tThe first of two complex input samples. This value is split\n");
|
fprintf(vmain, "//\t\t\tis split into two two\'s complement numbers, of \n");
|
fprintf(vmain, "//\t\t\tinto two two\'s complement numbers, %d bits each, with\n", nbitsin);
|
fprintf(vmain, "//\t\t\t%d bits each, with the real portion in the high\n", nbitsin);
|
fprintf(vmain, "//\t\t\tthe real portion in the high order bits, and the\n");
|
fprintf(vmain, "//\t\t\torder bits, and the imaginary portion taking the\n");
|
fprintf(vmain, "//\t\t\timaginary portion taking the bottom %d bits.\n", nbitsin);
|
fprintf(vmain, "//\t\t\tbottom %d bits.\n", nbitsin);
|
fprintf(vmain, "//\ti_right\tThis is the same thing as i_left, only this is the second of\n");
|
fprintf(vmain, "//\t\ti_right\tThis is the same thing as i_left, only this is the\n");
|
fprintf(vmain, "//\t\t\ttwo such samples. Hence, i_left would contain input\n");
|
fprintf(vmain, "//\t\t\tsecond of two such samples. Hence, i_left would\n");
|
fprintf(vmain, "//\t\t\tsample zero, i_right would contain sample one. On the\n");
|
fprintf(vmain, "//\t\t\tcontain input sample zero, i_right would contain\n");
|
fprintf(vmain, "//\t\t\tnext clock i_left would contain input sample two,\n");
|
fprintf(vmain, "//\t\t\tsample one. On the next clock i_left would contain\n");
|
fprintf(vmain, "//\t\t\ti_right number three and so forth.\n");
|
fprintf(vmain, "//\t\t\tinput sample two, i_right number three and so forth.\n");
|
fprintf(vmain, "//\to_left\tThe first of two output samples, of the same format as i_left,\n");
|
fprintf(vmain, "//\t\to_left\tThe first of two output samples, of the same\n");
|
fprintf(vmain, "//\t\t\tonly having %d bits for each of the real and imaginary\n", nbitsout);
|
fprintf(vmain, "//\t\t\tformat as i_left, only having %d bits for each of\n", nbitsout);
|
fprintf(vmain, "//\t\t\tcomponents, leading to %d bits total.\n", nbitsout*2);
|
fprintf(vmain, "//\t\t\tthe real and imaginary components, leading to %d\n", nbitsout*2);
|
fprintf(vmain, "//\to_right\tThe second of two output samples produced each clock. This has\n");
|
fprintf(vmain, "//\t\t\tbits total.\n");
|
fprintf(vmain, "//\t\t\tthe same format as o_left.\n");
|
fprintf(vmain, "//\t\to_right\tThe second of two output samples produced each clock.\n");
|
fprintf(vmain, "//\to_sync\tA one bit output indicating the first valid sample produced by\n");
|
fprintf(vmain, "//\t\t\tThis has the same format as o_left.\n");
|
fprintf(vmain, "//\t\t\tthis FFT following a reset. Ever after, this will\n");
|
fprintf(vmain, "//\t\to_sync\tA one bit output indicating the first valid sample\n");
|
fprintf(vmain, "//\t\t\tindicate the first sample of an FFT frame.\n");
|
fprintf(vmain, "//\t\t\tproduced by this FFT following a reset. Ever after,\n");
|
|
fprintf(vmain, "//\t\t\tthis will indicate the first sample of an FFT frame.\n");
|
|
fprintf(vmain, "//\n");
|
fprintf(vmain, "//\n");
|
fprintf(vmain, "// Arguments:\tThis file was computer generated using the\n");
|
fprintf(vmain, "// Arguments:\tThis file was computer generated using the\n");
|
fprintf(vmain, "//\t\tfollowing command line:\n");
|
fprintf(vmain, "//\t\tfollowing command line:\n");
|
fprintf(vmain, "//\n");
|
fprintf(vmain, "//\n");
|
fprintf(vmain, "//\t\t%% %s\n", cmdline.c_str());
|
fprintf(vmain, "//\t\t%% %s\n", cmdline.c_str());
|
