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annotate sw/mcsi-rxtx/rx_samples.c @ 16:f422d19c0118 default tip

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fc-mcsi-rxtx: fix bug in PCM sample Rx
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 29 Oct 2024 01:41:33 +0000
parents 315428573a25
children
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1 /*
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2 * In this module we handle PCM samples received from MCSI via the FPGA.
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3 */
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5 #include <sys/types.h>
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6 #include <stdio.h>
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7
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8 extern int is_active;
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10 u_short rx_pcm_samples[160];
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11
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12 void
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13 process_rx_block(buf)
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14 u_char *buf;
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15 {
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16 unsigned n, samp;
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17 u_char *sp;
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19 sp = buf;
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20 for (n = 0; n < 160; n++) {
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21 samp = ((unsigned) sp[1] << 8) | ((unsigned) sp[0]);
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22 rx_pcm_samples[n] = samp;
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23 sp += 2;
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24 }
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25 record_process();
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26 }
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28 void
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29 cmd_print_rx()
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30 {
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31 unsigned i, j, n;
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33 if (!is_active) {
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34 printf("Rx is not active\n");
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35 return;
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36 }
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37 n = 0;
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38 for (i = 0; i < 10; i++) {
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39 for (j = 0; j < 16; j++) {
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40 printf("%04x", rx_pcm_samples[n++]);
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41 if (j == 15)
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42 putchar('\n');
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43 else
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44 putchar(' ');
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45 }
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46 }
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47 }