jepler/wwvbdecode-2011
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This commit is contained in:
Jeff Epler 2021-10-25 08:21:33 -05:00
parent 3ec149e90e
commit 56a131651f
1 changed files with 42 additions and 16 deletions
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58
wwvbdecode.cc
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@ -250,10 +250,10 @@ bool try_set_time(wwvb_t &new_t) {
decode_one_minute(0, t0);
decode_one_minute(60, t1);
printf("first minute %s\n", format_wwvbtime(t0));
printf("second minute %s\n", format_wwvbtime(t1));
//printf("first minute %s\n", format_wwvbtime(t0));
//printf("second minute %s\n", format_wwvbtime(t1));
advance_minute(t0);
printf("advanced %s\n", format_wwvbtime(t0));
//printf("advanced %s\n", format_wwvbtime(t0));
if(t0 == t1) {
t1.second = 59;
new_t = t1;
@ -300,20 +300,46 @@ void wwvb_receive_loop(bool raw_wwvb) {
bool rising_edge = edge && wwvb;
bool falling_edge = edge && !wwvb;
free_running_ms ++;
if(free_running_ms >= 1000) {
free_running_ms -= 1000;
next_second();
}
printf("wwvb_receive_loop %c %4d %d %8d\n",
"_~-+"[wwvb + 2*edge], counter, wwvb_polarity, free_running_ms);
switch(wwvb_state) {
case STATE_FIND_POLARITY:
if(rising_edge) {
if(counter_near(1000)) {
if(sos_counter == 0) {
printf(
"rising edge with sos_counter = 0: reset counter %d->0\n",
counter);
counter = 0;
sos_counter ++;
} else if(counter_near(1000)) {
sos_counter++;
if(sos_counter == 5) {
printf(
"good rising edge counter=%d sos_counter->%d\n",
counter, sos_counter);
if(sos_counter == 10) {
goto set_state_capture_time;
}
} else { sos_counter = 0; wwvb_polarity = !wwvb_polarity; }
} else {
printf(
"bad rising edge counter=%d polarity->%d\n",
counter, !wwvb_polarity);
sos_counter = 0; wwvb_polarity = !wwvb_polarity;
}
}
break;
case STATE_CAPTURE_TIME:
if(rising_edge) {
if(!counter_near(1000)) {
printf(
"bad rising edge counter=%d -> find_polarity",
counter);
goto set_state_find_polarity;
}
if(pending_set_time) {
@ -321,6 +347,9 @@ void wwvb_receive_loop(bool raw_wwvb) {
pending_set_time = false;
free_running_ms = 1000 + SIGNAL_DELAY;
}
static uint8_t seconds_unset;
seconds_unset ++;
if(seconds_unset == 0) goto set_state_find_polarity;
}
if(falling_edge) {
if(counter_near(200)) WWVB_PUT(0);
@ -328,21 +357,16 @@ void wwvb_receive_loop(bool raw_wwvb) {
else if(counter_near(800)) {
WWVB_PUT(2);
pending_set_time = try_set_time(pending_time);
} else
} else {
printf(
"bad falling edge counter=%d -> find_polarity",
counter);
goto set_state_find_polarity;
}
}
static uint8_t seconds_unset;
seconds_unset ++;
if(seconds_unset == 0) goto set_state_find_polarity;
}
free_running_ms ++;
if(free_running_ms >= 1000) {
free_running_ms -= 1000;
next_second();
}
if(rising_edge) {
pps_good = counter_near(1000);
#ifdef TUNE
@ -358,12 +382,14 @@ void wwvb_receive_loop(bool raw_wwvb) {
return;
set_state_capture_time:
printf("->capture time\n");
counter = 0;
memset(wwvb_buf, 0, sizeof(wwvb_buf));
wwvb_state = STATE_CAPTURE_TIME;
return;
set_state_find_polarity:
printf("->find_polarity\n");
sos_counter = 0;
wwvb_state = STATE_FIND_POLARITY;
return;