FreeCalypso > hg > freecalypso-tools

annotate rfcal/vcxo-manual/genparams.c @ 219:d13ee4ef86c7

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
rfcal migration
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 20 May 2017 19:43:49 +0000
parents 3eb53be9e667
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
182
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1 #include <math.h>
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
2 #include <stdio.h>
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
3 #include <stdlib.h>
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
4 #include "meas.h"
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
5
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
6 struct meas meas[4];
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
7 float lin_a, lin_b, lin_a2, lin_b2;
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
8 float dac_min, dac_max, dac_init;
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
9 float Psi_sta, Psi_st;
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
10
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
11 write_output(filename)
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
12 char *filename;
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
13 {
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
14 FILE *outf;
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
15
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
16 if (filename) {
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
17 outf = fopen(filename, "w");
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
18 if (!outf) {
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
19 perror(filename);
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
20 exit(1);
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
21 }
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
22 } else
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
23 outf = stdout;
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
24
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
25 fputs("rf_table afcparams\n\n", outf);
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
26 /* Psi parameters */
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
27 fprintf(outf, "%10u\t# Psi_sta_inv\n", (unsigned)(1.0f / Psi_sta));
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
28 fprintf(outf, "%10u\t# Psi_st\n", (unsigned)(Psi_st * 65536.0f));
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
29 fprintf(outf, "%10u\t# Psi_st_32\n",
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
30 (unsigned)(Psi_st * 65536.0f * 65536.0f));
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
31 fprintf(outf, "%10u\t# Psi_st_inv\n\n", (unsigned)(1.0f / Psi_st));
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
32 /* DAC settings */
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
33 fprintf(outf, "%10d\t# DAC_INIT * 8\n", (int)(dac_init * 8.0f));
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
34 fprintf(outf, "%10d\t# DAC_MIN * 8\n", (int)(dac_min * 8.0f));
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
35 fprintf(outf, "%10d\t# DAC_MAX * 8\n", (int)(dac_max * 8.0f));
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
36 fprintf(outf, "%10d\t# snr_thr\n", 2560);
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
37 /* rfpw 10 setting in a comment line */
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
38 fprintf(outf, "\n# DAC_INIT: rfpw 10 %d\n", (int)dac_init);
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
39
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
40 if (filename)
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
41 fclose(outf);
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
42 }
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
43
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
44 main(argc, argv)
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
45 char **argv;
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
46 {
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
47 if (argc < 2 || argc > 3) {
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
48 fprintf(stderr, "usage: %s meas-file [outfile]\n", argv[0]);
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
49 exit(1);
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
50 }
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
51 read_meas_file(argv[1], meas, 4);
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
52
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
53 /* first linear approximation */
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
54 lin_a = (float)(meas[1].freq_offset - meas[0].freq_offset) /
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
55 (float)(meas[1].dac_value - meas[0].dac_value);
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
56 lin_b = (float)meas[1].freq_offset - lin_a * meas[1].dac_value;
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
57
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
58 /* second linear approximation */
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
59 lin_a2 = (float)(meas[3].freq_offset - meas[2].freq_offset) /
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
60 (float)(meas[3].dac_value - meas[2].dac_value);
184
b8599a1d5813 fc-vcxo-param: bug in lin_b2 computation
Mychaela Falconia <falcon@freecalypso.org>
parents: 182
diff changeset
61 lin_b2 = (float)meas[3].freq_offset - lin_a2 * meas[3].dac_value;
182
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
62
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
63 /* DAC settings */
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
64 dac_min = (-13500.0f - lin_b) / lin_a;
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
65 dac_max = (13500.0f - lin_b) / lin_a;
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
66 dac_init = -lin_b2 / lin_a2;
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
67
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
68 /* Psi computations */
185
3eb53be9e667 fc-vcxo-param: use M_PI constant instead of acos(-1.0)
Mychaela Falconia <falcon@freecalypso.org>
parents: 184
diff changeset
69 Psi_sta = 2.0f * (float)M_PI *
3eb53be9e667 fc-vcxo-param: use M_PI constant instead of acos(-1.0)
Mychaela Falconia <falcon@freecalypso.org>
parents: 184
diff changeset
70 (float)(meas[1].freq_offset - meas[0].freq_offset) /
3eb53be9e667 fc-vcxo-param: use M_PI constant instead of acos(-1.0)
Mychaela Falconia <falcon@freecalypso.org>
parents: 184
diff changeset
71 ((float)(meas[1].dac_value - meas[0].dac_value) * 270833.0f);
182
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
72 Psi_st = Psi_sta * 0.8f;
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
73
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
74 /* spit it all out */
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
75 write_output(argv[2]);
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
76 exit(0);
9099a35a705f manual VCXO calibration code: fc-vcxo-param utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
77 }