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QRP_LABS_WSPR
kopia lustrzana https://github.com/roncarr880/QRP_LABS_WSPR
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roncarr880 2020-09-04 10:01:15 -04:00 zatwierdzone przez GitHub
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QRP_LABS_WSPR.ino
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@ -485,36 +485,43 @@ uint64_t local_drift; // corrects for drift due to day/night temperature c
char wwvb_trends( char val, uint8_t data ){
static int i;
uint8_t count;
uint8_t type1,type2; // 64 == sync, 32 == 1, 0 == 0
#define HANG 11 // trend time needed and bit timeout on errors
uint8_t trend_t,new_t;
#define HANG 11 // trend time needed and bit timeout on errors ( max 15 )
#define SYNC 64
#define ONES 32
#define ZEROS 0
if( ++i >= 60 ) i = 0;
if( data == 0 ) return val; // probably transmitting
count = trends[i] & 31;
type1 = trends[i] & (32 | 64 );
type2 = 128; // assume error
if( val == 'S' ) type2 = 64;
if( val == '1' ) type2 = 32;
if( val == '0' ) type2 = 0;
trend_t = trends[i] & (ONES | SYNC );
new_t = 128; // assume error
if( val == 'S' ) new_t = SYNC;
if( val == '1' ) new_t = ONES;
if( val == '0' ) new_t = ZEROS;
if( type1 == type2 ){ // increment the trend if match
if( trend_t == new_t ){ // increment the trend if match
if( count < 2*HANG ) count += 1;
}
else if( type2 == 128 ){ // decrement the trend on error
if( count ) --count; // will fall below trend threshold in HANG time
else if( new_t == 128 && trend_t != SYNC ){ // decrement the trend on error, but sticky sync type
if( count ) --count; // will fall below trend threshold in HANG time
}
if( type1 != type2 && type2 != 128 ){
count = 1; // initial count when the bit decoded but different than before
type1 = type2; // new type
if( trend_t != new_t && new_t != 128 ){ // valid decode, bit changed, replace type
if( trend_t == SYNC && count > 1 ) --count; // don't directly replace a sync, decay it instead
else{
count = 1; // initial count when the bit decoded but different than before
trend_t = new_t; // new type
}
}
trends[i] = type1 + count; // save new trend values
trends[i] = trend_t + count; // save new trend values
if( type2 != 128 ) return val; // return successful decode
if( new_t != 128 ) return val; // return successful decode
if( count > HANG ){ // else return history for this bit
if( type1 == 0 ) val = 'o';
if( type1 == 32 ) val = 'i';
if( type1 == 64 ) val = 's';
if( trend_t == 0 ) val = 'o';
if( trend_t == 32 ) val = 'i';
if( trend_t == 64 ) val = 's';
}
return val;