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added "gray" area between data and control signal to improve sync detection

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This commit is contained in:
Ahmet Inan 2014-12-07 18:14:37 +01:00
parent 9446d5976e
commit 32efb41613
2 changed files with 9 additions and 9 deletions
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7
app/src/main/rs/calibration_detector.rsh
View file

@ -20,12 +20,11 @@ limitations under the License.
#include "constants.rsh"
#include "state.rsh"
static int calibration_detected(float dat_value, int cnt_active, int cnt_quantized)
static int calibration_detected(float dat_value, int dat_active, int cnt_active, int cnt_quantized)
{
static int progress, countdown;
static int leader_counter, break_counter;
int dat_active = !cnt_active;
progress = countdown ? progress : 0;
countdown -= !!countdown;
@ -99,9 +98,9 @@ static int calibration_detected(float dat_value, int cnt_active, int cnt_quantiz
return -1;
}
static int calibration_detector(float dat_value, int cnt_active, int cnt_quantized)
static int calibration_detector(float dat_value, int dat_active, int cnt_active, int cnt_quantized)
{
switch (calibration_detected(dat_value, cnt_active, cnt_quantized)) {
switch (calibration_detected(dat_value, dat_active, cnt_active, cnt_quantized)) {
case 0x88:
return mode_robot36;
case 0x0c:

11
app/src/main/rs/decoder.rs
View file

@ -130,10 +130,11 @@ void decode(int samples) {
float cnt_value = demodulate(&cnt_fmd, cnt_baseband);
float dat_value = demodulate(&dat_fmd, dat_baseband);
int cnt_active = cabs(dat_baseband) < cabs(cnt_baseband);
uchar cnt_level = save_cnt ? 127.5f - 127.5f * cnt_value : 0.0f;
uchar dat_level = save_dat ? 127.5f + 127.5f * dat_value : 0.0f;
value_buffer[hpos + even_hpos] = cnt_active ? cnt_level : dat_level;
int cnt_active = cabs(dat_baseband) < 4.0f * cabs(cnt_baseband);
int dat_active = cabs(cnt_baseband) < 4.0f * cabs(dat_baseband);
uchar cnt_level = save_cnt && cnt_active ? 127.5f - 127.5f * cnt_value : 0.0f;
uchar dat_level = save_dat && dat_active ? 127.5f + 127.5f * dat_value : 0.0f;
value_buffer[hpos + even_hpos] = cnt_level | dat_level;
int cnt_quantized = round(cnt_value);
int dat_quantized = round(dat_value);
@ -143,7 +144,7 @@ void decode(int samples) {
sync_counter = sync_level ? sync_counter + 1 : 0;
if (*current_mode != mode_raw) {
int detected_mode = calibration_detector(dat_value, cnt_active, cnt_quantized);
int detected_mode = calibration_detector(dat_value, dat_active, cnt_active, cnt_quantized);
if (detected_mode >= 0)
reset();
switch_mode(detected_mode);