async.c File Reference

#include <inttypes.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include "spandsp/telephony.h"
#include "spandsp/async.h"

Functions
void	async_rx_init (async_rx_state_t *s, int data_bits, int parity, int stop_bits, int use_v14, put_byte_func_t put_byte, void *user_data)
	Initialise an asynchronous data receiver context.
void	async_rx_put_bit (void *user_data, int bit)
	Accept a bit from a received serial bit stream.
void	async_tx_init (async_tx_state_t *s, int data_bits, int parity, int stop_bits, int use_v14, get_byte_func_t get_byte, void *user_data)
	Initialise an asynchronous data transmit context.
int	async_tx_get_bit (void *user_data)
	Get the next bit of a transmitted serial bit stream.

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Detailed Description

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Function Documentation

void async_rx_init	(	async_rx_state_t *	s,
		int	data_bits,
		int	parity_bits,
		int	stop_bits,
		int	use_v14,
		put_byte_func_t	put_byte,
		void *	user_data
	)

Initialise an asynchronous data receiver context.

Initialise an asynchronous data receiver context.

Parameters:

	s	The receiver context.
	data_bits	The number of data bits.
	parity_bits	The type of parity.
	stop_bits	The number of stop bits.
	use_v14	TRUE if V.14 rate adaption processing should be used.
	put_byte	The callback routine used to put the received data.
	user_data	An opaque pointer.

void async_rx_put_bit	(	void *	user_data,
		int	bit
	)

Accept a bit from a received serial bit stream.

Accept a bit from a received serial bit stream

Parameters:

	user_data	An opaque point which must point to a receiver context.
	bit	The new bit. Some special values are supported for this field. PUTBIT_CARRIER_UP PUTBIT_CARRIER_DOWN PUTBIT_TRAINING_SUCCEEDED PUTBIT_TRAINING_FAILED PUTBIT_END_OF_DATA

int async_tx_get_bit

(

void *

user_data

)

Get the next bit of a transmitted serial bit stream.

Get the next bit of a transmitted serial bit stream.

Parameters:

user_data

An opaque point which must point to a transmitter context.

Returns:

the next bit, or PUTBIT_END_OF_DATA to indicate the data stream has ended.

void async_tx_init	(	async_tx_state_t *	s,
		int	data_bits,
		int	parity_bits,
		int	stop_bits,
		int	use_v14,
		get_byte_func_t	get_byte,
		void *	user_data
	)

Initialise an asynchronous data transmit context.

Initialise an asynchronous data transmit context.

Parameters:

	s	The transmitter context.
	data_bits	The number of data bit.
	parity_bits	The type of parity.
	stop_bits	The number of stop bits.
	use_v14	TRUE if V.14 rate adaption processing should be used.
	get_byte	The callback routine used to get the data to be transmitted.
	user_data	An opaque pointer.

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