100 lines
2.7 KiB
C
100 lines
2.7 KiB
C
#pragma once
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#include <stdint.h>
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#include <stdbool.h>
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#include <unistd.h>
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#include <math.h>
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#include <osmocom/core/endian.h>
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#include "debug.h"
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#define MAX_RX_BURST_BUF_SIZE 444 /* 444 = EDGE_BURST_NBITS */
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enum Modulation {
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MODULATION_GMSK,
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MODULATION_8PSK,
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/* Not supported yet:
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MODULATION_AQPSK,
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MODULATION_16QAM,
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MODULATION_32QAM
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*/
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};
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struct trx_ul_burst_ind {
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float rx_burst[MAX_RX_BURST_BUF_SIZE]; /* soft bits normalized 0..1 */
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unsigned nbits; // number of symbols per slot in rxBurst, not counting guard periods
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uint32_t fn; // TDMA frame number
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uint8_t tn; // TDMA time-slot number
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double rssi; // in dBFS
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double toa; // in symbols
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double noise; // noise level in dBFS
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bool idle; // true if no valid burst is included
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enum Modulation modulation; // modulation type
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uint8_t tss; // training sequence set
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uint8_t tsc; // training sequence code
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float ci; // Carrier-to-Interference ratio, in dB
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};
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bool trxd_send_burst_ind_v0(size_t chan, int fd, const struct trx_ul_burst_ind *bi);
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bool trxd_send_burst_ind_v1(size_t chan, int fd, const struct trx_ul_burst_ind *bi);
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/* The latest supported TRXD header format version */
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#define TRX_DATA_FORMAT_VER 1
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struct trxd_hdr_common {
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#if OSMO_IS_LITTLE_ENDIAN
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uint8_t tn:3,
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reserved:1,
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version:4;
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#elif OSMO_IS_BIG_ENDIAN
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/* auto-generated from the little endian part above (libosmocore/contrib/struct_endianness.py) */
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uint8_t version:4, reserved:1, tn:3;
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#endif
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uint32_t fn; /* big endian */
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} __attribute__ ((packed));
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struct trxd_hdr_v0_specific {
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uint8_t rssi;
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uint16_t toa; /* big endian */
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} __attribute__ ((packed));
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struct trxd_hdr_v0 {
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struct trxd_hdr_common common;
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struct trxd_hdr_v0_specific v0;
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uint8_t soft_bits[0];
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} __attribute__ ((packed));
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/* Downlink burst (BTS->TRX), v0 anf v1 use same format */
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struct trxd_hdr_v01_dl {
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struct trxd_hdr_common common;
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uint8_t tx_att; /* Tx Attentuation */
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uint8_t soft_bits[0];
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} __attribute__ ((packed));
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#define TRXD_MODULATION_GMSK(ts_set) (0b0000 | (ts_set & 0b0011))
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#define TRXD_MODULATION_8PSK(ts_set) (0b0100 | (ts_set & 0b0001))
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#define TRXD_MODULATION_AQPSK(ts_set) (0b0110 | (ts_set & 0b0001))
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#define TRXD_MODULATION_16QAM(ts_set) (0b1000 | (ts_set & 0b0001))
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#define TRXD_MODULATION_32QAM(ts_set) (0b1010 | (ts_set & 0b0001))
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struct trxd_hdr_v1_specific {
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#if OSMO_IS_LITTLE_ENDIAN
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uint8_t tsc:3,
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modulation:4,
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idle:1;
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#elif OSMO_IS_BIG_ENDIAN
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/* auto-generated from the little endian part above (libosmocore/contrib/struct_endianness.py) */
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uint8_t idle:1, modulation:4, tsc:3;
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#endif
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int16_t ci; /* big endian, in centiBels */
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} __attribute__ ((packed));
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struct trxd_hdr_v1 {
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struct trxd_hdr_common common;
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struct trxd_hdr_v0_specific v0;
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struct trxd_hdr_v1_specific v1;
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uint8_t soft_bits[0];
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} __attribute__ ((packed));
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