n5ac/smartsdr-dsp
1
0
Fork 0
mirror of https://github.com/n5ac/smartsdr-dsp.git synced 2026-04-09 00:03:46 +00:00
Code Issues Projects Releases Packages Wiki Activity

Successfully decoding DSTAR Header information. Cleanup and full state machine work starting

Browse source
This commit is contained in:
Ed Gonzalez 2015-06-11 11:31:29 -05:00
parent 8b3fc14b2f
commit 014b457794
4 changed files with 76 additions and 31 deletions
Download patch file Download diff file Expand all files Collapse all files

42
DSP_API/SmartSDR_Interface/sched_waveform.c
View file

@ -49,6 +49,7 @@
#include "thumbDV.h"
#include "bit_pattern_matcher.h"
#include "dstar.h"
#include "DStarDefines.h"
//static Queue sched_fft_queue;
@ -207,6 +208,7 @@ static int _dv_serial_fd = 0;
static GMSK_DEMOD _gmsk_demod = NULL;
static GMSK_MOD _gmsk_mod = NULL;
static BIT_PM _syn_pm = NULL;
static BIT_PM _data_sync_pm = NULL;
static void* _sched_waveform_thread(void* param)
{
@ -288,6 +290,7 @@ static void* _sched_waveform_thread(void* param)
BOOL dstar_header[660] = {0};
uint32 header_count = 0;
BOOL found_syn_bits = FALSE;
BOOL found_data_sync_bits = FALSE;
// show that we are running
BufferDescriptor buf_desc;
@ -380,7 +383,7 @@ static void* _sched_waveform_thread(void* param)
output("FOUND SYN BITS\n");
bitPM_reset(_syn_pm);
}
} else {
} else if ( header_count < 660 ){
/* We have already found syn-bits accumulate 660 bits */
if ( state == DEMOD_TRUE ) {
dstar_header[header_count++] = TRUE;
@ -394,29 +397,49 @@ static void* _sched_waveform_thread(void* param)
output("Found 660 bits - descrambling\n");
/* Found 660 bits of header */
unsigned char bytes[660/8 +1];
gmsk_bitsToBytes(dstar_header, bytes, 660);
thumbDV_dump("RAW:", bytes, 660/8);
uint32 scramble_count = 0;
BOOL descrambled[660] = {0};
dstar_scramble(dstar_header, descrambled, header_count, &scramble_count);
gmsk_bitsToBytes(descrambled, bytes, 660);
thumbDV_dump("DESCRAMBLE:", bytes, 660/8);
BOOL out[660] = {0};
dstar_deinterleave(descrambled, out, 660);
gmsk_bitsToBytes(out, bytes, 660);
thumbDV_dump("DEINTERLEAVE:", bytes, 660/8);
dstar_fec fec;
memset(&fec, 0, sizeof(dstar_fec));
unsigned int outLen = 0;
dstar_FECdecode(&fec, out, dstar_header, 660, &outLen);
unsigned int outLen = 660;
BOOL decoded[330] = {0};
dstar_FECdecode(&fec, out, decoded, 660, &outLen);
output("outLen = %d\n" ,outLen);
gmsk_bitsToBytes(dstar_header, bytes, outLen);
thumbDV_dump("FEC: ", dstar_header, outLen/8);
gmsk_bitsToBytes(decoded, bytes, outLen);
thumbDV_dump("FEC: ", bytes, outLen/8);
header_count = 0;
found_syn_bits = FALSE;
}
} else {
if ( state == DEMOD_TRUE ) {
found_data_sync_bits = bitPM_addBit(_data_sync_pm, TRUE);
//output("%d ", 1);
} else if ( state == DEMOD_FALSE ) {
found_data_sync_bits = bitPM_addBit(_data_sync_pm, FALSE);
//output("%d ", 0);
} else {
//output("UNKNOWN DEMOD STATE");
//bits[bit] = 0x00;
}
if ( found_data_sync_bits ) {
output("FOUND DATA SYNC BITS\n");
bitPM_reset(_syn_pm);
header_count = 0;
found_syn_bits = FALSE;
}
}
}
@ -664,7 +687,7 @@ static void* _sched_waveform_thread(void* param)
void sched_waveform_Init(void)
{
//dstar_FECTest();
dstar_FECTest();
//exit(0);
_gmsk_demod = gmsk_createDemodulator();
@ -685,6 +708,7 @@ void sched_waveform_Init(void)
}
_syn_pm = bitPM_create( syn_bits, 64+15);
_data_sync_pm = bitPM_create( DATA_SYNC_BITS, 24);