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RS92: rs92ecc /w bch_ecc.c

pull/3/head
Zilog80 2017-11-12 23:09:29 +01:00
rodzic 5deae32921
commit b0b3c0107e
1 zmienionych plików z 42 dodań i 46 usunięć
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rs92/rs92ecc.c
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@ -19,31 +19,27 @@
*/
/*
gcc rs92gps.c -lm -o rs92gps
gcc rs92ecc.c -lm -o rs92ecc
(includes nav_gps_vel.c)
examples:
sox -t oss /dev/dsp -t wav - lowpass 2600 2>/dev/null | ./rs92gps -e brdc3050.15n
sox -t oss /dev/dsp -t wav - lowpass 2600 2>/dev/null | ./rs92ecc -e brdc3050.15n
./rs92gps -r 2015_11_01.wav > raw1.out
sox -t oss /dev/dsp -t wav - lowpass 2600 2>/dev/null | stdbuf -oL ./rs92gps -r > raw2.out
./rs92gps --dop 5 -gg -e brdc3050.15n --rawin1 raw.out
./rs92ecc -r 2015_11_01.wav > raw1.out
sox -t oss /dev/dsp -t wav - lowpass 2600 2>/dev/null | stdbuf -oL ./rs92ecc -r > raw2.out
./rs92ecc --dop 5 -gg -e brdc3050.15n --rawin1 raw.out
sox -t oss /dev/dsp -t wav - lowpass 2600 2>/dev/null | tee audio.wav | ./rs92gps -e brdc3050.15n
./rs92gps -g1 -e brdc3050.15n 2015_11_01-14.wav | tee out1.txt
./rs92gps -g2 -e brdc3050.15n 2015_11_01-14.wav | tee out2.txt
sox 2015_11_01.wav -t wav - lowpass 2600 2>/dev/null | ./rs92gps -gg -e brdc3050.15n | tee out3.txt
sox -t oss /dev/dsp -t wav - lowpass 2600 2>/dev/null | tee audio.wav | ./rs92ecc -e brdc3050.15n
./rs92ecc -g1 -e brdc3050.15n 2015_11_01-14.wav | tee out1.txt
./rs92ecc -g2 -e brdc3050.15n 2015_11_01-14.wav | tee out2.txt
sox 2015_11_01.wav -t wav - lowpass 2600 2>/dev/null | ./rs92ecc -gg -e brdc3050.15n | tee out3.txt
sox -t oss /dev/dsp -t wav - lowpass 2600 2>/dev/null | stdbuf -oL ./rs92gps -e brdc3050.15n > out1.txt
sox -t oss /dev/dsp -t wav - lowpass 2600 2>/dev/null | stdbuf -oL ./rs92gps -e brdc3050.15n | tee out2.txt
sox -t oss /dev/dsp -t wav - lowpass 2600 2>/dev/null | stdbuf -oL ./rs92ecc -e brdc3050.15n > out1.txt
sox -t oss /dev/dsp -t wav - lowpass 2600 2>/dev/null | stdbuf -oL ./rs92ecc -e brdc3050.15n | tee out2.txt
*/
/* (uses fec-lib by KA9Q)
ka9q-fec:
gcc -c init_rs_char.c
gcc -c decode_rs_char.c
gcc init_rs_char.o decode_rs_char.o rs92ecc.c -lm -o rs92ecc
--ecc: error correction
sox -t oss /dev/dsp -t wav - lowpass 6000 2>/dev/null | ./rs92ecc -b --ecc --crc -e brdc3050.15n
*/
#include <stdio.h>
@ -57,14 +53,18 @@
#endif
#include "fec.h"
typedef unsigned char ui8_t;
typedef unsigned short ui16_t;
typedef unsigned int ui32_t;
#include "bch_ecc.c" // RS/ecc/
#define rs_N 255
#define rs_R 24
#define rs_K (rs_N-rs_R)
void *rs;
unsigned char codeword[rs_N];
ui8_t cw[rs_N];
typedef struct {
int typ;
@ -78,10 +78,6 @@ typedef struct {
rscfg_t cfg_rs92 = { 92, 240-6-24, 6, 240-24, 6, 240};
typedef unsigned char ui8_t;
typedef unsigned short ui16_t;
typedef unsigned int ui32_t;
typedef struct {
int frnr;
char id[11];
@ -601,8 +597,9 @@ int get_Cal() {
unsigned byte;
ui8_t calfr = 0;
//ui8_t burst = 0;
ui8_t bytes[2];
int freq = 0;
ui8_t freq_bytes[2];
unsigned int killtime = 0;
byte = framebyte(pos_CalData);
calfr = byte;
@ -636,14 +633,20 @@ int get_Cal() {
if (calfr == 0x00) {
for (i = 0; i < 2; i++) {
byte = framebyte(pos_Calfreq + i);
freq_bytes[i] = byte;
bytes[i] = framebyte(pos_Calfreq + i);
}
byte = freq_bytes[0] + (freq_bytes[1] << 8);
byte = bytes[0] + (bytes[1] << 8);
//fprintf(stdout, ":%04x ", byte);
freq = 400000 + 10*byte; // kHz;
gpx.freq = freq;
fprintf(stdout, " : fq %d kHz", freq);
for (i = 0; i < 2; i++) {
bytes[i] = framebyte(pos_Calfreq + 2 + i);
}
killtime = bytes[0] + (bytes[1] << 8);
if (killtime < 0xFFFF && option_verbose == 4) {
fprintf(stdout, " ; KT:%ds", killtime);
}
}
return 0;
@ -1297,30 +1300,21 @@ int get_GPSkoord(int N) {
int rs92_ecc(int msglen) {
int i, ret = 0;
int errors, errpos[rs_R];
int errors;
ui8_t err_pos[rs_R], err_val[rs_R];
if (msglen > FRAME_LEN) msglen = FRAME_LEN;
for (i = msglen; i < FRAME_LEN; i++) frame[i] = 0;
for (i = msglen; i < FRAME_LEN; i++) frame[i] = 0;//xFF;
for (i = 0; i < cfg_rs92.msglen; i++) codeword[rs_K-1-i] = frame[cfg_rs92.msgpos+i];
for (i = 0; i < rs_R ; i++) codeword[rs_N-1-i] = frame[cfg_rs92.parpos+i];
for (i = 0; i < rs_R; i++) cw[i] = frame[cfg_rs92.parpos+i];
for (i = 0; i < cfg_rs92.msglen; i++) cw[rs_R+i] = frame[cfg_rs92.msgpos+i];
errors = decode_rs_char(rs, codeword, errpos, 0);
/*
fprintf(stdout, "codeword, ");
fprintf(stdout, "errors: %d\n", errors);
if (errors > 0) {
fprintf(stdout, "pos: ");
for (i = 0; i < errors; i++) fprintf(stdout, " %d", errpos[i]);
fprintf(stdout, "\n");
}
*/
errors = rs_decode(cw, err_pos, err_val);
//for (i = 0; i < cfg_rs92.hdrlen; i++) frame[i] = data[i];
for (i = 0; i < cfg_rs92.msglen; i++) frame[cfg_rs92.msgpos+i] = codeword[rs_K-1-i];
for (i = 0; i < rs_R ; i++) frame[cfg_rs92.parpos+i] = codeword[rs_N-1-i];
for (i = 0; i < rs_R; i++) frame[cfg_rs92.parpos+i] = cw[i];
for (i = 0; i < cfg_rs92.msglen; i++) frame[cfg_rs92.msgpos+i] = cw[rs_R+i];
ret = errors;
@ -1606,7 +1600,7 @@ int main(int argc, char *argv[]) {
if (option_ecc) {
rs = init_rs_char( 8, 0x11d, 0, 1, rs_R, 0);
rs_init_RS255();
}
@ -1649,6 +1643,7 @@ int main(int argc, char *argv[]) {
if (bit_count == BITS) {
bit_count = 0;
byte = bits2byte(bitbuf);
if (byte > 0xFF) byte = 0xFF;
frame[byte_count] = byte;
byte_count++;
if (byte_count == FRAME_LEN) {
@ -1671,6 +1666,7 @@ int main(int argc, char *argv[]) {
if (bit_count == BITS) {
bit_count = 0;
byte = bits2byte(bitbuf);
if (byte > 0xFF) byte = 0xFF;
frame[byte_count] = byte;
byte_count++;
}