afsk.h File Reference

AFSK1200 modem. More...

#include "cfg/cfg_afsk.h"
#include "hw/hw_afsk.h"
#include <cfg/compiler.h>
#include <io/kfile.h>
#include <struct/fifobuf.h>

Data Structures
struct	Hdlc
	HDLC (High-Level Data Link Control) context. More...
struct	Afsk
	AFSK1200 modem context. More...
Defines
#define	SAMPLERATE 9600
	ADC sample rate.
#define	BITRATE 1200
	Bitrate of the received/transmitted data.
#define	AFSK_RXFIFO_OVERRUN BV(0)
	RX FIFO buffer full error.
Afsk filter types.

#define	AFSK_BUTTERWORTH 0
#define	AFSK_CHEBYSHEV 1
Functions
void	afsk_adc_isr (Afsk *af, int8_t sample)
	ADC ISR callback.
uint8_t	afsk_dac_isr (Afsk *af)
	DAC ISR callback.
void	afsk_init (Afsk *af, int adc_ch, int dac_ch)
	Initialize an AFSK1200 modem.

Detailed Description

AFSK1200 modem.

Definition in file afsk.h.

#define BITRATE 1200

Bitrate of the received/transmitted data.

The demodulator filters and decoderes are designed to work at this frequency. If you need to change this remember to update afsk_adc_isr().

Definition at line 69 of file afsk.h.

#define SAMPLERATE 9600

ADC sample rate.

The demodulator filters are designed to work at this frequency. If you need to change this remember to update afsk_adc_isr().

Definition at line 62 of file afsk.h.

ADC ISR callback.

This function has to be called by the ADC ISR when a sample of the configured channel is available.

Parameters:

	af	Afsk context to operate on.
	curr_sample	current sample from the ADC.

Definition at line 214 of file afsk.c.

uint8_t afsk_dac_isr ( Afsk * af )

DAC ISR callback.

This function has to be called by the DAC ISR when a sample of the configured channel has been converted out.

Parameters:

af

Afsk context to operate on.

Definition at line 346 of file afsk.c.

Initialize an AFSK1200 modem.

Parameters:

	af	Afsk context to operate on.
	adc_ch	ADC channel used by the demodulator.
	dac_ch	DAC channel used by the modulator.

Definition at line 541 of file afsk.c.