williamp/osmocom-analog
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

New common FSK implementation, replaces all individual implementations

Browse Source
This commit is contained in:
Andreas Eversberg
2017-08-05 10:41:23 +02:00
parent ffd3b848e1
commit 534411d660
21 changed files with 785 additions and 1117 deletions
Download Patch File Download Diff File Expand all files Collapse all files

26
src/bnetz/bnetz.h
View File

@@ -1,4 +1,4 @@
#include "../common/goertzel.h"
#include "../common/fsk.h"
#include "../common/sender.h"
/* fsk modes of transmission */
@@ -75,24 +75,20 @@ typedef struct bnetz {
/* dsp states */
enum dsp_mode dsp_mode; /* current mode: audio, durable tone 0 or 1, "Telegramm" */
goertzel_t fsk_goertzel[2]; /* filter for fsk decoding */
int samples_per_bit; /* how many samples lasts one bit */
sample_t *fsk_filter_spl; /* array with samples_per_bit */
int fsk_filter_pos; /* current sample position in filter_spl */
int fsk_filter_step; /* number of samples for each analyzation */
int fsk_filter_bit; /* last bit, so we detect a bit change */
int fsk_filter_sample; /* count until it is time to sample bit */
uint16_t fsk_filter_telegramm; /* rx shift register for receiveing telegramm */
double fsk_filter_quality[16]; /* quality of each bit in telegramm */
double fsk_filter_level[16]; /* level of each bit in telegramm */
int fsk_filter_qualidx; /* index of quality array above */
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 */
int tone_detected; /* what tone has been detected */
int tone_count; /* how long has that tone been detected */
double phaseshift65536[2]; /* how much the phase of sine wave changes per sample */
double phase65536; /* current phase */
int telegramm; /* set, if there is a valid telegram */
sample_t *telegramm_spl; /* 16 * samples_per_bit */
int telegramm_pos; /* current sample position in telegramm_spl */
const char *tx_telegramm; /* carries bits of one frame to transmit */
int tx_telegramm_pos;
int samples_per_chunk; /* samples per loss detection interval */
sample_t *chunk_spl; /* chunk sample */
int chunk_pos; /* current received sample of chunk */
/* loopback test for latency */
int loopback_count; /* count digits from 0 to 9 */