FreeCalypso > hg > freecalypso-tools
annotate rfcal/vcxo-manual/linear.c @ 189:425f16556e69
doc/CMU200-notes started
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Sun, 23 Apr 2017 16:42:43 +0000 |
parents | dcab0be3f67a |
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rev | line source |
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dcab0be3f67a
started manual VCXO calibration code: fc-vcxo-linear utility written
Mychaela Falconia <falcon@freecalypso.org>
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1 #include <stdio.h> |
dcab0be3f67a
started manual VCXO calibration code: fc-vcxo-linear utility written
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2 #include <stdlib.h> |
dcab0be3f67a
started manual VCXO calibration code: fc-vcxo-linear utility written
Mychaela Falconia <falcon@freecalypso.org>
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3 #include "meas.h" |
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4 |
dcab0be3f67a
started manual VCXO calibration code: fc-vcxo-linear utility written
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5 struct meas meas[2]; |
dcab0be3f67a
started manual VCXO calibration code: fc-vcxo-linear utility written
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6 float lin_a, lin_b, target_off; |
dcab0be3f67a
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Mychaela Falconia <falcon@freecalypso.org>
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7 int target_dac; |
dcab0be3f67a
started manual VCXO calibration code: fc-vcxo-linear utility written
Mychaela Falconia <falcon@freecalypso.org>
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8 |
dcab0be3f67a
started manual VCXO calibration code: fc-vcxo-linear utility written
Mychaela Falconia <falcon@freecalypso.org>
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9 main(argc, argv) |
dcab0be3f67a
started manual VCXO calibration code: fc-vcxo-linear utility written
Mychaela Falconia <falcon@freecalypso.org>
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10 char **argv; |
dcab0be3f67a
started manual VCXO calibration code: fc-vcxo-linear utility written
Mychaela Falconia <falcon@freecalypso.org>
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11 { |
dcab0be3f67a
started manual VCXO calibration code: fc-vcxo-linear utility written
Mychaela Falconia <falcon@freecalypso.org>
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12 if (argc < 2 || argc > 3) { |
dcab0be3f67a
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Mychaela Falconia <falcon@freecalypso.org>
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13 fprintf(stderr, "usage: %s meas-file [target]\n", argv[0]); |
dcab0be3f67a
started manual VCXO calibration code: fc-vcxo-linear utility written
Mychaela Falconia <falcon@freecalypso.org>
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14 exit(1); |
dcab0be3f67a
started manual VCXO calibration code: fc-vcxo-linear utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
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15 } |
dcab0be3f67a
started manual VCXO calibration code: fc-vcxo-linear utility written
Mychaela Falconia <falcon@freecalypso.org>
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16 read_meas_file(argv[1], meas, 2); |
dcab0be3f67a
started manual VCXO calibration code: fc-vcxo-linear utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
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17 if (argc > 2) |
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18 target_off = atof(argv[2]); |
dcab0be3f67a
started manual VCXO calibration code: fc-vcxo-linear utility written
Mychaela Falconia <falcon@freecalypso.org>
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19 else |
dcab0be3f67a
started manual VCXO calibration code: fc-vcxo-linear utility written
Mychaela Falconia <falcon@freecalypso.org>
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20 target_off = 0; |
dcab0be3f67a
started manual VCXO calibration code: fc-vcxo-linear utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
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21 lin_a = (float)(meas[1].freq_offset - meas[0].freq_offset) / |
dcab0be3f67a
started manual VCXO calibration code: fc-vcxo-linear utility written
Mychaela Falconia <falcon@freecalypso.org>
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22 (float)(meas[1].dac_value - meas[0].dac_value); |
dcab0be3f67a
started manual VCXO calibration code: fc-vcxo-linear utility written
Mychaela Falconia <falcon@freecalypso.org>
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23 lin_b = (float)meas[1].freq_offset - lin_a * meas[1].dac_value; |
dcab0be3f67a
started manual VCXO calibration code: fc-vcxo-linear utility written
Mychaela Falconia <falcon@freecalypso.org>
parents:
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24 target_dac = (target_off - lin_b) / lin_a; |
dcab0be3f67a
started manual VCXO calibration code: fc-vcxo-linear utility written
Mychaela Falconia <falcon@freecalypso.org>
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25 printf("%d\n", target_dac); |
dcab0be3f67a
started manual VCXO calibration code: fc-vcxo-linear utility written
Mychaela Falconia <falcon@freecalypso.org>
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26 exit(0); |
dcab0be3f67a
started manual VCXO calibration code: fc-vcxo-linear utility written
Mychaela Falconia <falcon@freecalypso.org>
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27 } |