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comparison ft16/tx_func.c @ 2:5c18cd38c8ad

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ft16: import from ice1-trau-tester/abis
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 29 Aug 2024 13:07:16 +0000
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1:e5527fc2050b 2:5c18cd38c8ad
1 /*
2 * Here we are going to implement Tx on Abis toward the BTS.
3 */
4
5 #include <stdint.h>
6 #include <stdbool.h>
7 #include <stdio.h>
8 #include <stdlib.h>
9 #include <string.h>
10 #include <unistd.h>
11
12 #include <osmocom/core/msgb.h>
13 #include <osmocom/core/select.h>
14 #include <osmocom/isdn/i460_mux.h>
15 #include <osmocom/trau/trau_frame.h>
16
17 #include "globals.h"
18 #include "submux.h"
19 #include "dl_frames.h"
20
21 static void tx_service_subslot(int nr)
22 {
23 struct abis_subslot *ab = &subslots[nr];
24 const uint8_t *srcbuf;
25 struct msgb *msg;
26 uint8_t *outbuf;
27
28 if (!ab->got_sync)
29 return;
30 switch (ab->frame_type) {
31 case TRAU_FT_FR_UP:
32 srcbuf = dl_frame_fr;
33 break;
34 case TRAU_FT_EFR:
35 srcbuf = dl_frame_efr;
36 break;
37 default:
38 return;
39 }
40 msg = msgb_alloc_c(g_ctx, DL_OUTPUT_LEN, "TRAU-DL-frame");
41 if (!msg)
42 return;
43 outbuf = msgb_put(msg, DL_OUTPUT_LEN);
44 memcpy(outbuf, srcbuf, DL_OUTPUT_LEN);
45 osmo_i460_mux_enqueue(ab->schan, msg);
46 }
47
48 void transmit_e1_ts(void)
49 {
50 uint8_t buf[160];
51 int nr;
52
53 for (nr = 0; nr < ABIS_SUBSLOTS; nr++)
54 tx_service_subslot(nr);
55 osmo_i460_mux_out(&i460_ts, buf, 160);
56 write(ts_fd, buf, 160);
57 }