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28 #if !defined(_SPANDSP_PRIVATE_V17TX_H_)
29 #define _SPANDSP_PRIVATE_V17TX_H_
32 #define V17_TX_FILTER_STEPS 9
52 #if defined(SPANDSP_USE_FIXED_POINT)
power_meter_t power
A power meter, to measure the HPF'ed signal power in the channel.
Definition: private/v17rx.h:192
get_bit_func_t current_get_bit
The get_bit function in use at any instant.
Definition: private/v17tx.h:100
void * status_user_data
A user specified opaque pointer passed to the status function.
Definition: private/v17tx.h:50
int rrc_filter_step
Current offset into the RRC pulse shaping filter buffer.
Definition: private/v17tx.h:69
int in_training
Scrambler tap.
Definition: private/v17tx.h:83
void(* modem_status_func_t)(void *user_data, int status)
Definition: async.h:114
int bits_per_symbol
The current number of data bits per symbol. This does not include the redundant bit.
Definition: private/v17tx.h:98
int training_step
A counter used to track progress through sending the training sequence.
Definition: private/v17tx.h:87
int32_t dds_phase_ratef(float frequency)
Find the phase rate equivalent to a frequency, in Hz.
Definition: dds_float.c:2109
complexf_t dds_complexf(uint32_t *phase_acc, int32_t phase_rate)
Generate a complex floating point tone sample.
Definition: dds_float.c:2165
v17_tx_state_t * v17_tx_init(v17_tx_state_t *s, int bit_rate, int tep, get_bit_func_t get_bit, void *user_data)
Initialise a V.17 modem transmit context.
Definition: v17tx.c:431
int baud_phase
The current fractional phase of the baud timing.
Definition: private/v17tx.h:94
void v17_tx_set_get_bit(v17_tx_state_t *s, get_bit_func_t get_bit, void *user_data)
Change the get_bit function associated with a V.17 modem transmit context.
Definition: v17tx.c:358
SPAN_DECLARE_NONSTD(int) async_tx_get_bit(void *user_data)
Get the next bit of a transmitted serial bit stream.
#define V17_TX_FILTER_STEPS
Definition: private/v17tx.h:32
float im
Imaginary part.
Definition: complex.h:47
#define V17_TRAINING_SEG_1
Definition: v17tx.c:81
void * get_bit_user_data
A user specified opaque pointer passed to the get_bit function.
Definition: private/v17tx.h:45
int constellation_state
The code number for the current position in the constellation.
Definition: private/v17tx.h:76
@ SIG_STATUS_SHUTDOWN_COMPLETE
A modem has completed its task, and shut down.
Definition: async.h:77
int(* get_bit_func_t)(void *user_data)
Definition: async.h:108
int v17_tx_restart(v17_tx_state_t *s, int bit_rate, int tep, int short_train)
Reinitialise an existing V.17 modem transmit context.
Definition: v17tx.c:380
uint32_t scramble_reg
The register for the data scrambler.
Definition: private/v17tx.h:79
void v17_tx_power(v17_tx_state_t *s, float power)
Adjust a V.17 modem transmit context's output power.
Definition: v17tx.c:346
int diff
The current state of the differential encoder.
Definition: private/v17tx.h:72
#define V17_TRAINING_SEG_TEP_A
Definition: v17tx.c:77
#define V17_TRAINING_SEG_TEP_B
Definition: v17tx.c:79
int v17_tx_free(v17_tx_state_t *s)
Free a V.17 modem transmit context.
Definition: v17tx.c:469
modem_status_func_t status_handler
The callback function used to report modem status changes.
Definition: private/v17tx.h:48
#define V17_TRAINING_END
Definition: v17tx.c:91
#define CARRIER_NOMINAL_FREQ
Definition: v17tx.c:73
uint32_t carrier_phase
The current phase of the carrier (i.e. the DDS parameter).
Definition: private/v17tx.h:90
complexf_t rrc_filter[2 *9]
The root raised cosine (RRC) pulse shaping filter buffer.
Definition: private/v17tx.h:65
#define V17_TRAINING_SHORT_SEG_4
Definition: v17tx.c:89
#define V17_TRAINING_SEG_3
Definition: v17tx.c:85
#define V17_BRIDGE_WORD
Definition: v17tx.c:97
int bit_rate
The bit rate of the modem. Valid values are 4800, 7200 and 9600.
Definition: private/v17tx.h:41
float gain
The gain factor needed to achieve the specified output power.
Definition: private/v17tx.h:61
#define V17_TRAINING_SHUTDOWN_END
Definition: v17tx.c:94
int v17_tx_release(v17_tx_state_t *s)
Release a V.17 modem transmit context.
Definition: v17tx.c:463
void v17_tx_set_modem_status_handler(v17_tx_state_t *s, modem_status_func_t handler, void *user_data)
Change the modem status report function associated with a V.17 modem transmit context.
Definition: v17tx.c:367
int short_train
Scrambler tap.
Definition: private/v17rx.h:168
float re
Real part.
Definition: complex.h:45
int convolution
The current state of the convolutional encoder.
Definition: private/v17tx.h:74
Definition: private/v17tx.h:38
int short_train
TRUE if the short training sequence is to be used.
Definition: private/v17tx.h:85
logging_state_t * v17_tx_get_logging_state(v17_tx_state_t *s)
Get the logging context associated with a V.17 modem transmit context.
Definition: v17tx.c:374
const complexf_t * constellation
A pointer to the constellation currently in use.
Definition: private/v17tx.h:63
logging_state_t logging
Error and flow logging control.
Definition: private/v17tx.h:102
#define V17_TRAINING_SEG_4
Definition: v17tx.c:87
Definition: private/logging.h:33
int32_t carrier_phase_rate
The update rate for the phase of the carrier (i.e. the DDS increment).
Definition: private/v17tx.h:92
int bit_rate
The bit rate of the modem. Valid values are 7200 9600, 12000 and 14400.
Definition: private/v17rx.h:57
@ SIG_STATUS_END_OF_DATA
The data stream has ended.
Definition: async.h:71
complexi_t dds_complexi(uint32_t *phase_acc, int32_t phase_rate)
Generate a complex integer tone sample.
Definition: dds_int.c:394
#define V17_TRAINING_SEG_2
Definition: v17tx.c:83
get_bit_func_t get_bit
The callback function used to get the next bit to be transmitted.
Definition: private/v17tx.h:43