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FIX: added @marshmellow42 's fix for #514 (offical repo) lf search hang with no tag on antenna.

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iceman1001 2018-02-28 07:59:41 +01:00
commit 535c92fee5
3 changed files with 23 additions and 15 deletions
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28
armsrc/lfsampling.c
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@ -116,7 +116,7 @@ void LFSetupFPGAForADC(int divisor, bool lf_field) {
* @param silent - is true, now outputs are made. If false, dbprints the status
* @return the number of bits occupied by the samples.
*/
uint32_t DoAcquisition(uint8_t decimation, uint32_t bits_per_sample, bool averaging, int trigger_threshold, bool silent, int bufsize) {
uint32_t DoAcquisition(uint8_t decimation, uint32_t bits_per_sample, bool averaging, int trigger_threshold, bool silent, int bufsize, uint32_t cancel_after) {
//bigbuf, to hold the aquired raw data signal
uint8_t *dest = BigBuf_get_addr();
bufsize = (bufsize > 0 && bufsize < BigBuf_max_traceLen()) ? bufsize : BigBuf_max_traceLen();
@ -135,8 +135,9 @@ uint32_t DoAcquisition(uint8_t decimation, uint32_t bits_per_sample, bool averag
uint32_t sample_sum =0 ;
uint32_t sample_total_numbers = 0;
uint32_t sample_total_saved = 0;
while(!BUTTON_PRESS() && !usb_poll_validate_length() ) {
uint32_t cancel_counter = 0;
while (!BUTTON_PRESS() && !usb_poll_validate_length() ) {
WDT_HIT();
if (AT91C_BASE_SSC->SSC_SR & AT91C_SSC_TXRDY) {
AT91C_BASE_SSC->SSC_THR = 0x43;
@ -146,9 +147,15 @@ uint32_t DoAcquisition(uint8_t decimation, uint32_t bits_per_sample, bool averag
sample = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
LED_D_OFF();
// threshold either high or low values 128 = center 0. if trigger = 178
if ((trigger_threshold > 0) && (sample < (trigger_threshold+128)) && (sample > (128-trigger_threshold))) //
if ((trigger_threshold > 0) && (sample < (trigger_threshold + 128)) && (sample > (128 - trigger_threshold))) {
if (cancel_after > 0) {
cancel_counter++;
if (cancel_after == cancel_counter)
break;
}
continue;
}
trigger_threshold = 0;
sample_total_numbers++;
@ -191,7 +198,7 @@ uint32_t DoAcquisition(uint8_t decimation, uint32_t bits_per_sample, bool averag
}
if (!silent) {
Dbprintf("Done, saved %d out of %d seen samples at %d bits/sample",sample_total_saved, sample_total_numbers,bits_per_sample);
Dbprintf("Done, saved %d out of %d seen samples at %d bits/sample", sample_total_saved, sample_total_numbers, bits_per_sample);
Dbprintf("buffer samples: %02x %02x %02x %02x %02x %02x %02x %02x ...",
dest[0], dest[1], dest[2], dest[3], dest[4], dest[5], dest[6], dest[7]);
}
@ -206,7 +213,7 @@ uint32_t DoAcquisition(uint8_t decimation, uint32_t bits_per_sample, bool averag
* @return number of bits sampled
*/
uint32_t DoAcquisition_default(int trigger_threshold, bool silent) {
return DoAcquisition(1, 8, 0,trigger_threshold, silent, 0);
return DoAcquisition(1, 8, 0,trigger_threshold, silent, 0, 0);
}
uint32_t DoAcquisition_config( bool silent, int sample_size) {
return DoAcquisition(config.decimation
@ -214,11 +221,12 @@ uint32_t DoAcquisition_config( bool silent, int sample_size) {
,config.averaging
,config.trigger_threshold
,silent
,sample_size);
,sample_size
,0);
}
uint32_t DoPartialAcquisition(int trigger_threshold, bool silent, int sample_size) {
return DoAcquisition(1, 8, 0, trigger_threshold, silent, sample_size);
uint32_t DoPartialAcquisition(int trigger_threshold, bool silent, int sample_size, uint32_t cancel_after) {
return DoAcquisition(1, 8, 0, trigger_threshold, silent, sample_size, cancel_after);
}
uint32_t ReadLF(bool activeField, bool silent, int sample_size) {