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QRP_LABS_WSPR
kopia lustrzana https://github.com/roncarr880/QRP_LABS_WSPR
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roncarr880 2019-09-18 11:58:58 -04:00 zatwierdzone przez GitHub
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QRP_LABS_WSPR.ino
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@ -45,8 +45,8 @@
// values of 10 and 1 will change about 1hz per 16 hours.
#define CLK_UPDATE_MIN 10
#define CLK_UPDATE_AMT 20 // amount in factional hz, 1/100 hz
#define CLK_UPDATE_THRESHOLD 20 // errors allowed for consider valid sync to WWVB and allow clock adjustment
uint8_t clk_update_threshold = 45; // start out with a higher threshold and reduce it as we sync to wwvb
#define CLK_UPDATE_THRESHOLD 30 // errors allowed per minute to consider valid sync to WWVB
uint8_t clk_update_threshold = 57; // start out with a higher threshold and reduce it as we sync to wwvb
#define stage(c) Serial.write(c)
@ -112,11 +112,6 @@ const uint32_t magic_freq[10] = {
474200, 1836600, 3568600, 7038600, 10138700, 14095600, 18104600, 21094600, 24924600, 28124600
};
// WWVB receiver in a fringe area - integrate the signal to remove noise
// Although it probably makes more sense to dump the integrator 10 times per second, here we use 8.
// sample each millisecond, sum 100 or 150 samples , decide if low or high, shift into temp variable
// at end of 1 second( 8 bits), decide if temp has a 1, 0, or sync. Shift into 64 bit data and sync variables.
// when the sync variable contains the magic number, decode the 64 bit data.
#define WWVB_OUT 9
#define WWVB_PWDN 8 // was the low enable. Rewired the WWVB receiver to get power from this I/O pin.
// this reverses the logic so it is now high to enable. With only two wires in the
@ -127,8 +122,8 @@ uint64_t wwvb_data, wwvb_sync, wwvb_errors;
uint8_t wwvb_quiet = 0; // wwvb debug print flag, set to 1 for printing
// or enter 1 CAT command( ?V for Rx only or #0 to stay in FRAME mode with logging )
uint8_t wwvb_stats[8]; // bit distribution over 60 seconds
uint8_t wwvb_last_err; // display last error character received ( will show what causes just one error )
//uint8_t wwvb_stats[8]; // bit distribution over 60 seconds
//uint8_t wwvb_last_err; // display last error character received ( will show what causes just one error )
uint8_t frame_sec; // frame timer counts 0 to 120
int frame_msec;
@ -300,144 +295,111 @@ static int temp; // just for flashing the LED when there is I2C activ
}
// each second starts with a low signal and ends with a high signal
// much like software sampling rs232 start and stop bits.
// this routine runs fast by design until it locks on the wwvb signal
// sample the wwvb signal and detect bits, syncs, and errors
void wwvb_sample(unsigned long t){
static unsigned long old_t;
int loops;
static uint8_t bounce;
static uint8_t state;
static long ms;
static unsigned int low_counter;
static unsigned int high_counter;
static long ave_time;
static long ave_count;
uint8_t b,s,e;
static uint8_t wwvb_clk, wwvb_sum, wwvb_tmp, wwvb_count; // data decoding
const uint8_t counts[8] = { 100,100,150,150,150,150,100,100 }; // total of 1000 ms
static uint8_t secs,errors,early,late; // debug use
static uint8_t dither = 4; // quick sync, adjusts to 1 when signal is good
int adj;
loops = t - old_t;
old_t = t;
loops = t - old_t;
old_t = t;
while( loops-- ){ // repeat for any missed milliseconds
while( loops-- ){ // repeat for any missed milliseconds
if( digitalRead(WWVB_OUT) == LOW ) ++wwvb_sum;
if( --wwvb_clk == 0 ){ // end of period, dump integrator
b = ( wwvb_sum > (counts[wwvb_count] >> 1) ) ? 0 : 128;
wwvb_tmp >>= 1;
wwvb_tmp |= b;
wwvb_sum = 0;
// 8 dumps of the integrator is one second, decode this bit ?
wwvb_count++;
wwvb_count &= 7;
wwvb_clk = counts[wwvb_count]; // 100 100 150 150 150 150 100 100
// decode 0 1 sync stop should be high
if( wwvb_count == 0 ){ // decode time
// clocks late or early, just dither them back and forth across the falling edge
// when not in sync, more 1's than 0's are detected and this slips in time.
if( wwvb_tmp != 0xff && wwvb_tmp != 0x00 ){
if( digitalRead(WWVB_OUT) == 0 ){
++late; // sampling late
wwvb_clk -= dither; // adjust sample to earlier
}
else{
++early; // need to sample later
wwvb_clk += dither; // longer clock ( more of these as arduino runs fast )
}
}
// decode
// 11111100 is a zero, 11110000 is a one, 11000000 is a sync
b = 0; s = 0; e = 1; // assume it is an error
// strict decode works well, added some loose decode for common bit errors
if( wwvb_tmp == 0xfc || wwvb_tmp == 0xfd || wwvb_tmp == 0xfe ) e = 0, b = 0;
if( wwvb_tmp == 0xf0 || wwvb_tmp == 0xf1 ) e = 0, b = 1;
if( wwvb_tmp == 0xc0 || wwvb_tmp == 0xc1 ) e = 0, s = 1;
wwvb_data <<= 1; wwvb_data |= b; // shift 64 bits data
wwvb_sync <<= 1; wwvb_sync |= s; // sync
wwvb_errors <<= 1; wwvb_errors |= e; // errors
if( e ) ++errors;
gather_stats( wwvb_tmp , e ); // for serial logging display
bounce <<= 1;
if( digitalRead(WWVB_OUT) == HIGH ) bounce |= 1; // debounce, looking for zero or 255 value
++ms;
switch(state){
case 0: // looking for a low signal
++high_counter;
if( bounce == 0 ){ // found the low, decode the bit for the previous second
state = 1;
b = s = e = 0;
high_counter += low_counter; // get total frame ms
if( high_counter < 800 || high_counter > 1200 ) e = 1; // too short or too long
if( low_counter > 100 && low_counter < 300 ) b = 0; // decode the bit
else if( low_counter > 400 && low_counter < 600 ) b = 1;
else if( low_counter > 700 && low_counter < 900 ) s = 1;
else e = 1; // no valid decode
low_counter = 0;
wwvb_data <<= 1; wwvb_data |= b; // shift 64 bits data
wwvb_sync <<= 1; wwvb_sync |= s; // sync
wwvb_errors <<= 1; wwvb_errors |= e; // errors
// magic 64 bits of sync ( looking at 60 seconds of data with 4 seconds of the past minute )
// xxxx1000000001 0000000001 0000000001 0000000001 0000000001 0000000001
// wwvb_sync &= 0x0fffffffffffffff; // mask off the old bits from previous minute
// instead of masking, use the old bits to see the double sync bits at 0 of this minute
// use the old bits to see the double sync bits at 0 of this minute
// and 59 seconds of the previous minute. This decodes at zero time rather than some
// algorithms that decode at 1 second past.
if( wwvb_sync == 0b0001100000000100000000010000000001000000000100000000010000000001 ){
if( wwvb_errors == 0 ){ // decode if no bit errors
wwvb_decode();
}
}
if( wwvb_sync == 0b0001100000000100000000010000000001000000000100000000010000000001 ){
if( wwvb_errors == 0 ){ // decode if no bit errors
wwvb_decode();
}
}
if( ++secs >= 60 /*&& frame_sec < 114*/ ){ // adjust dither each minute
int tm = frame_sync( errors );
// debug print out some stats when in test mode
if( wwvb_quiet == 1 && errors != 0){
Serial.print("Tm "); Serial.print(frame_msec);
Serial.write(','); Serial.print(tm);
Serial.print(" Err "); Serial.print(errors);
Serial.print(" Clk "); Serial.print(early);
Serial.write(','); Serial.print(late);
print_stats(1);
//Serial.write(' '); Serial.print((unsigned long)( clock_freq / 100LL) );
Serial.write(' '); Serial.print(clock_adj_sum/100);
Serial.println();
// gather some stats for printing
if( e == 0 ){
ave_time += frame_msec;
if( frame_msec >= 500 ) ave_time -= 1000; // 500-999 averaged in as -(1000-frame_msec)
++ave_count; // implemented as +frame_msec - 1000
}
else print_stats(0);
dither = ( errors >> 4 ) + 1;
early = late = secs = errors = 0; // reset the stats for the next minute
}
}
break;
case 1: // looking for a high signal
++low_counter;
if( bounce == 255 ){
state = 0;
high_counter = 0;
}
break;
}
if( ms >= 60000 ){ // print out some stats if in printing mode
if( ave_count ){
ave_time = ave_time/ave_count;
if( ave_time < 0 ) ave_time += 1000;
}
adj = frame_sync( 60-ave_count, ave_time ); // sync our seconds to wwvb falling edge signal
// debug print out some stats when in test mode
if( wwvb_quiet == 1 && ave_count != 60){
Serial.print("Tm ");
if( ave_time < 100 ) Serial.write(' ');
if( ave_time < 10 ) Serial.write(' ');
Serial.print(ave_time);
Serial.print(" Adj");
if( adj >= 0 ) Serial.write(' ');
if( abs(adj) < 100 ) Serial.write(' ');
if( abs(adj) < 10 ) Serial.write(' ');
Serial.print(adj);
Serial.print(" Valid ");
if( ave_count < 10 ) Serial.write(' ');
Serial.print(ave_count);
Serial.print(" Clock "); Serial.print(clock_adj_sum/100);
Serial.println();
}
// reset the stats for the next minute
ms = ave_count = ave_time = 0;
}
} // end decode time
} // end integration timer
} // loops - repeat for lost milliseconds if any
}
void gather_stats( uint8_t data, uint8_t err ){
uint8_t i;
if( err ) wwvb_last_err = data; // capture the last failed data bits for Serial log
for( i = 0; i < 8; ++i ){
if( data & 1 ) ++wwvb_stats[i];
data >>= 1;
}
}
void print_stats(uint8_t prnt){
uint8_t i;
if( prnt ){ // ones and zeros distribution
Serial.print(" "); // when in sync with WWVB, will see a display such as 11XXxx00
for( i = 7; i < 8; --i ){
if( wwvb_stats[i] > 50 ) Serial.write('1');
else if( wwvb_stats[i] < 10 ) Serial.write('0');
else if( wwvb_stats[i] > 30 ) Serial.write('X');
else Serial.write('x');
// wwvb_stats[i] = 0;
}
// Serial.write(' '); // print binary with leading zero's, example failing data
// for( i = 7; i < 8; --i ){
// if( wwvb_last_err & 0x80 ) Serial.write('1');
// else Serial.write('0');
// wwvb_last_err <<= 1;
// }
}
for( i = 0; i < 8; ++i ) wwvb_stats[i] = 0;
}
void wwvb_decode(){ // WWVB transmits the data for the previous minute just ended
uint16_t tmp;
@ -538,12 +500,13 @@ long error;
// adjust frame timing based upon undecoded wwvb statistics, locks to the falling edge of the
// wwvb signal.
int frame_sync(int err){
int frame_sync(int err, long tm){
int8_t t,i;
static int last_time_error;
static int last_error_count = 60;
int loops;
if( tm > 990 || tm < 10 ) tm = 0; // deadband for clock corrections
loops = last_time_error/100; // loop 1,2,3,4 or 5 times for error <100, <200, <300, <400, <500
if( loops < 0 ) loops = -loops;
++loops;
@ -553,8 +516,9 @@ int loops;
t = 0;
if( err < clk_update_threshold && err < last_error_count ){ // test threshold for signal present or not, and
t = ( frame_msec < 500 ) ? -1 : 1 ; // lower error than last signal
last_time_error = ( frame_msec < 500 ) ? frame_msec : frame_msec - 1000 ; // refresh correction amount
t = ( tm < 500 ) ? -1 : 1 ; // lower error than last signal
if( tm == 0 ) t = 0;
last_time_error = ( tm < 500 ) ? tm : tm - 1000 ; // refresh correction amount
last_time_error += t;
last_error_count = err;
}
@ -1092,3 +1056,149 @@ static uint8_t delay_counter;
if( i2in != i2out ) return (state + 8);
else return state;
}
/*************************** some old code with interesting algorithms ****************************
// WWVB receiver in a fringe area - integrate the signal to remove noise
// Although it probably makes more sense to dump the integrator 10 times per second, here we use 8.
// sample each millisecond, sum 100 or 150 samples , decide if low or high, shift into temp variable
// at end of 1 second( 8 bits), decide if temp has a 1, 0, or sync. Shift into 64 bit data and sync variables.
// when the sync variable contains the magic number, decode the 64 bit data.
// each second starts with a low signal and ends with a high signal
// much like software sampling rs232 start and stop bits.
// this routine runs fast by design until it locks on the wwvb signal
void wwvb_sample(unsigned long t){
static unsigned long old_t;
int loops;
uint8_t b,s,e;
static uint8_t wwvb_clk, wwvb_sum, wwvb_tmp, wwvb_count; // data decoding
const uint8_t counts[8] = { 100,100,150,150,150,150,100,100 }; // total of 1000 ms
static uint8_t secs,errors,early,late; // debug use
static uint8_t dither = 4; // quick sync, adjusts to 1 when signal is good
loops = t - old_t;
old_t = t;
while( loops-- ){ // repeat for any missed milliseconds
if( digitalRead(WWVB_OUT) == LOW ) ++wwvb_sum;
if( --wwvb_clk == 0 ){ // end of period, dump integrator
b = ( wwvb_sum > (counts[wwvb_count] >> 1) ) ? 0 : 128;
wwvb_tmp >>= 1;
wwvb_tmp |= b;
wwvb_sum = 0;
// 8 dumps of the integrator is one second, decode this bit ?
wwvb_count++;
wwvb_count &= 7;
wwvb_clk = counts[wwvb_count]; // 100 100 150 150 150 150 100 100
// decode 0 1 sync stop should be high
if( wwvb_count == 0 ){ // decode time
// clocks late or early, just dither them back and forth across the falling edge
// when not in sync, more 1's than 0's are detected and this slips in time.
if( wwvb_tmp != 0xff && wwvb_tmp != 0x00 ){
if( digitalRead(WWVB_OUT) == 0 ){
++late; // sampling late
wwvb_clk -= dither; // adjust sample to earlier
}
else{
++early; // need to sample later
wwvb_clk += dither; // longer clock ( more of these as arduino runs fast )
}
}
// decode
// 11111100 is a zero, 11110000 is a one, 11000000 is a sync
b = 0; s = 0; e = 1; // assume it is an error
// strict decode works well, added some loose decode for common bit errors
if( wwvb_tmp == 0xfc || wwvb_tmp == 0xfd || wwvb_tmp == 0xfe ) e = 0, b = 0;
if( wwvb_tmp == 0xf0 || wwvb_tmp == 0xf1 ) e = 0, b = 1;
if( wwvb_tmp == 0xc0 || wwvb_tmp == 0xc1 ) e = 0, s = 1;
wwvb_data <<= 1; wwvb_data |= b; // shift 64 bits data
wwvb_sync <<= 1; wwvb_sync |= s; // sync
wwvb_errors <<= 1; wwvb_errors |= e; // errors
if( e ) ++errors;
gather_stats( wwvb_tmp , e ); // for serial logging display
// magic 64 bits of sync ( looking at 60 seconds of data with 4 seconds of the past minute )
// xxxx1000000001 0000000001 0000000001 0000000001 0000000001 0000000001
// wwvb_sync &= 0x0fffffffffffffff; // mask off the old bits from previous minute
// instead of masking, use the old bits to see the double sync bits at 0 of this minute
// and 59 seconds of the previous minute. This decodes at zero time rather than some
// algorithms that decode at 1 second past.
if( wwvb_sync == 0b0001100000000100000000010000000001000000000100000000010000000001 ){
if( wwvb_errors == 0 ){ // decode if no bit errors
wwvb_decode();
}
}
if( ++secs >= 60 ){ // adjust dither each minute
int tm = frame_sync( errors );
// debug print out some stats when in test mode
if( wwvb_quiet == 1 && errors != 0){
Serial.print("Tm "); Serial.print(frame_msec);
Serial.write(','); Serial.print(tm);
Serial.print(" Err "); Serial.print(errors);
Serial.print(" Clk "); Serial.print(early);
Serial.write(','); Serial.print(late);
print_stats(1);
//Serial.write(' '); Serial.print((unsigned long)( clock_freq / 100LL) );
Serial.write(' '); Serial.print(clock_adj_sum/100);
Serial.println();
}
else print_stats(0);
dither = ( errors >> 4 ) + 1;
early = late = secs = errors = 0; // reset the stats for the next minute
}
} // end decode time
} // end integration timer
} // loops - repeat for lost milliseconds if any
}
void gather_stats( uint8_t data, uint8_t err ){
uint8_t i;
if( err ) wwvb_last_err = data; // capture the last failed data bits for Serial log
for( i = 0; i < 8; ++i ){
if( data & 1 ) ++wwvb_stats[i];
data >>= 1;
}
}
void print_stats(uint8_t prnt){
uint8_t i;
if( prnt ){ // ones and zeros distribution
Serial.print(" "); // when in sync with WWVB, will see a display such as 11XXxx00
for( i = 7; i < 8; --i ){
if( wwvb_stats[i] > 50 ) Serial.write('1');
else if( wwvb_stats[i] < 10 ) Serial.write('0');
else if( wwvb_stats[i] > 30 ) Serial.write('X');
else Serial.write('x');
// wwvb_stats[i] = 0;
}
// Serial.write(' '); // print binary with leading zero's, example failing data
// for( i = 7; i < 8; --i ){
// if( wwvb_last_err & 0x80 ) Serial.write('1');
// else Serial.write('0');
// wwvb_last_err <<= 1;
// }
}
for( i = 0; i < 8; ++i ) wwvb_stats[i] = 0;
}
************************************************/