FreeCalypso > hg > fc-rfcal-tools

annotate autocal/vcxomeas.c @ 24:0b6881281d86

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fc-rfcal-vcxo ready for first test
author Mychaela Falconia <falcon@freecalypso.org>
date Mon, 22 May 2017 22:00:36 +0000
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children 5226dbaa5333
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0b6881281d86 fc-rfcal-vcxo ready for first test
Mychaela Falconia <falcon@freecalypso.org>
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1 /*
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2 * This module contains the frequency measurement code for fc-rfcal-vcxo.
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Mychaela Falconia <falcon@freecalypso.org>
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3 */
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4
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5 #include <stdio.h>
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6 #include <stdlib.h>
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7 #include <unistd.h>
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8 #include <rvinterf/l1tm.h>
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Mychaela Falconia <falcon@freecalypso.org>
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9 #include <rvinterf/exitcodes.h>
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10
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11 extern char tsid_response[];
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12
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13 float
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14 vcxo_freq_meas(dac, hint)
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15 int dac;
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16 char *hint;
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17 {
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18 char cmd[80];
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19 double meas;
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20
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21 printf("Performing frequency measurement at DAC=%d (%s)\n", dac, hint);
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Mychaela Falconia <falcon@freecalypso.org>
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22 do_rfpw(AFC_DAC_VALUE, dac);
0b6881281d86 fc-rfcal-vcxo ready for first test
Mychaela Falconia <falcon@freecalypso.org>
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23 usleep(80000);
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24 sprintf(cmd, "freq-meas %s\n", hint);
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25 tsid_command(cmd);
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26 atof(tsid_response + 1);
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27 printf("Measured frequency offset %.2f Hz\n", meas);
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Mychaela Falconia <falcon@freecalypso.org>
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28 return(meas);
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29 }