An implementation of Analog cellular networks like A-Netz, B-Netz, C-Netz, NMT, AMPS, TACS, JTACS, Radiocom 2000, IMTS, MPT1327, Eurosignal and more http://osmocom-analog.eversberg.eu/
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osmocom-analog/src/bnetz/bnetz.h

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4.8 KiB

#include "../libsquelch/squelch.h"
#include "../libfsk/fsk.h"
#include "../libmobile/sender.h"
#include "../libtimer/timer.h"
/* fsk modes of transmission */
enum dsp_mode {
DSP_MODE_SILENCE, /* sending silence */
DSP_MODE_AUDIO, /* stream audio */
DSP_MODE_AUDIO_METER, /* stream audio */
DSP_MODE_0, /* send tone 0 */
DSP_MODE_1, /* send tone 1 */
DSP_MODE_TELEGRAMM, /* send "Telegramm" */
};
/* current state of b-netz sender */
enum bnetz_state {
BNETZ_NULL = 0,
BNETZ_FREI, /* sending 'Gruppenfreisignal' */
BNETZ_WAHLABRUF, /* sending 'Wahlabruf', receiving call setup */
BNETZ_SELEKTIVRUF_EIN, /* paging phone (switch to calling channel) */
BNETZ_SELEKTIVRUF_AUS, /* paging phone (wait before switching back) */
BNETZ_RUFBESTAETIGUNG, /* waitig for acknowledge from phone */
BNETZ_RUFHALTUNG, /* phone is ringing */
BNETZ_GESPRAECH, /* during conversation */
BNETZ_TRENNEN, /* release of call */
};
/* current state of received dialing */
enum dial_mode {
DIAL_MODE_START,
DIAL_MODE_STATIONID,
DIAL_MODE_NUMBER,
DIAL_MODE_START2,
DIAL_MODE_STATIONID2,
DIAL_MODE_NUMBER2,
};
/* current dialing type (metering support) */
enum dial_type {
DIAL_TYPE_NOMETER,
DIAL_TYPE_METER,
DIAL_TYPE_METER_MUENZ,
};
/* current state of paging mobile station */
enum page_mode {
PAGE_MODE_NUMBER,
PAGE_MODE_KANALBEFEHL,
};
/* instance of bnetz sender */
typedef struct bnetz {
sender_t sender;
/* system info */
int gfs; /* 'Gruppenfreisignal' */
int metering; /* use metering pulses in seconds 0 = off, < 0 = force */
/* switch sender to channel 19 */
char paging_file[256]; /* if set, write to given file to switch to channel 19 or back */
char paging_on[256]; /* what to write to switch to channel 19 */
char paging_off[256]; /* what to write to switch back */
int paging_is_on; /* set, if we are on channel 19. also used to switch back on exit */
/* all bnetz states */
enum bnetz_state state; /* main state of sender */
int callref; /* call reference */
enum dial_mode dial_mode; /* sub state while dialing is received */
enum dial_type dial_type; /* defines if mobile supports metering pulses */
char dial_number[14]; /* dial string received (13 digits + termination, first 0-digit not included) */
int dial_pos; /* current position while receiving digits */
char station_id[6]; /* current station ID */
int station_id_pos; /* position while transmitting */
enum page_mode page_mode; /* sub state while paging */
int page_try; /* try number (1 or 2) */
struct timer timer;
int trenn_count; /* count number of release messages */
/* display measurements */
dispmeasparam_t *dmp_tone_level;
dispmeasparam_t *dmp_tone_stddev;
dispmeasparam_t *dmp_tone_quality;
dispmeasparam_t *dmp_frame_level;
dispmeasparam_t *dmp_frame_stddev;
dispmeasparam_t *dmp_frame_quality;
/* dsp states */
enum dsp_mode dsp_mode; /* current mode: audio, durable tone 0 or 1, "Telegramm" */
fsk_t fsk; /* fsk modem instance */
uint16_t rx_telegramm; /* rx shift register for receiveing telegramm */
double rx_telegramm_quality[16];/* quality of each bit in telegramm */
double rx_telegramm_level[16]; /* level of each bit in telegramm */
int rx_telegramm_qualidx; /* index of quality array above */
uint16_t rx_tone; /* rx shift register for receiveing continuous tone */
double rx_tone_quality[16]; /* quality of tone fragment (100th of second) */
double rx_tone_level[16]; /* level of tone fragment (100th of second) */
int rx_tone_qualidx; /* index of quality array above */
int tone_detected; /* what tone has been detected */
int tone_count; /* how long has that tone been detected */
int tone_duration; /* how long has that tone been detected */
const char *tx_telegramm; /* carries bits of one frame to transmit */
int tx_telegramm_pos;
double meter_phaseshift65536; /* how much the phase of sine wave changes per sample */
double meter_phase65536; /* current phase */
squelch_t squelch; /* squelch detection process */
/* loopback test for latency */
int loopback_count; /* count digits from 0 to 9 */
double loopback_time[10]; /* time stamp when sending digits 0..9 */
} bnetz_t;
double bnetz_kanal2freq(int kanal, int unterband);
int bnetz_init(void);
int bnetz_create(int kanal, const char *audiodev, int use_sdr, int samplerate, double rx_gain, int gfs, int pre_emphasis, int de_emphasis, const char *write_rx_wave, const char *write_tx_wave, const char *read_rx_wave, const char *read_tx_wave, int loopback, double squelch_db, const char *paging, int metering);
void bnetz_destroy(sender_t *sender);
void bnetz_loss_indication(bnetz_t *bnetz, double loss_time);
void bnetz_receive_tone(bnetz_t *bnetz, int bit);
void bnetz_receive_telegramm(bnetz_t *bnetz, uint16_t telegramm);
const char *bnetz_get_telegramm(bnetz_t *bnetz);