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enum am791x_type {
AM791X_TYPE_7910 = 0,
AM791X_TYPE_7911 = 1,
};
enum am791x_st {
AM791X_STATE_INIT = 0,
AM791X_STATE_RCON,
AM791X_STATE_CDON,
AM791X_STATE_DATA,
AM791X_STATE_RCOFF,
AM791X_STATE_CDOFF,
AM791X_STATE_STO_OFF,
AM791X_STATE_SQ_OFF,
AM791X_STATE_BRCON,
AM791X_STATE_BCDON,
AM791X_STATE_BDATA,
AM791X_STATE_BRCOFF,
AM791X_STATE_BCDOFF,
};
typedef struct am791x {
/* settings */
void *inst; /* upper layer instance */
enum am791x_type type;
int samplerate;
double tx_baud, rx_baud;
/* callbacks */
void (*cts_cb)(void *inst, int cts);
void (*bcts_cb)(void *inst, int cts);
void (*cd_cb)(void *inst, int cd);
void (*bcd_cb)(void *inst, int cd);
int (*td_cb)(void *inst);
int (*btd_cb)(void *inst);
void (*rd_cb)(void *inst, int bit, double quality, double level);
void (*brd_cb)(void *inst, int bit, double quality, double level);
/* modes */
uint8_t mc; /* current mode setting */
int fullduplex; /* duplex */
int loopback_main, loopback_back; /* loopback */
int equalizer, sto; /* equalizer & STO */
int bell_202; /* is BELL 202 */
/* states */
enum am791x_st tx_state, rx_state;
int tx_silence; /* no audio transmitted */
int tx_sto; /* no STO transmitted */
int block_td; /* "TD IGNORED" */
int block_rd; /* "RD = MARK" */
int line_cd; /* 1 = CD is low */
int block_cd; /* "SET CD HIGH" (CD is ignored) */
int block_btd; /* "BTD IGNORED" */
int block_brd; /* "BRD = MARK" */
int line_bcd; /* 1 = BCD is low */
int block_bcd; /* "SET BCD HIGH" (BCD is ignored) */
int squelch; /* "SQUELCH" (mute received audio) */
int line_dtr; /* 1 = DTR is low */
int line_rts; /* 1 = RTS is low */
int line_brts; /* 1 = BRTS is low */
int line_ring; /* 1 = ring is low */
/* frequencies */
int f0_tx, f1_tx;
int f0_rx, f1_rx;
/* timers */
struct osmo_timer_list tx_timer, rx_timer;
double t_rcon;
double t_rcoff;
double t_brcon;
double t_brcoff;
double t_cdon;
double t_cdoff;
double t_bcdon;
double t_bcdoff;
double t_at;
double t_sil1;
double t_sil2;
double t_sq;
double t_sto;
/* FSK/STO signal */
int rx_back_channel; /* indikates if receiver is tuned to back channel */
fsk_mod_t fsk_tx; /* FSK modulator */
fsk_demod_t fsk_rx; /* FSK demodulator */
double tx_level; /* level of TX */
double cd_on, cd_off; /* levels for CD */
int cd, bcd; /* carrier detected */
double sto_phaseshift65536; /* STO tone phase shift */
} am791x_t;
void am791x_send(am791x_t *am791x, sample_t *samples, int length);
void am791x_receive(am791x_t *am791x, sample_t *samples, int length);
void am791x_list_mc(enum am791x_type type);
int am791x_init(am791x_t *am791x, void *inst, enum am791x_type type, uint8_t mc, int samplerate, double tx_baud, double rx_baud, void (*cts)(void *inst, int cts), void (*bcts)(void *inst, int cts), void (*cd)(void *inst, int cd), void (*bcd)(void *inst, int cd), int (*td)(void *inst), int (*btd)(void *inst), void (*rd)(void *inst, int bit, double quality, double level), void (*brd)(void *inst, int bit, double quality, double level));
void am791x_exit(am791x_t *am791x);
double am791x_max_baud(uint8_t mc);
int am791x_mc(am791x_t *am791x, uint8_t mc, int samplerate, double tx_baud, double rx_baud);
void am791x_reset(am791x_t *am791x);
void am791x_dtr(am791x_t *am791x, int dtr);
void am791x_rts(am791x_t *am791x, int rts);
void am791x_brts(am791x_t *am791x, int brts);
void am791x_ring(am791x_t *am791x, int ring);
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