unleashed-firmware/applications/lfrfid/helpers/osc-fsk.cpp

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#include "osc-fsk.h"
OscFSK::OscFSK(uint16_t _freq_low, uint16_t _freq_hi, uint16_t _osc_phase_max)
: freq{_freq_low, _freq_hi}
, osc_phase_max(_osc_phase_max) {
osc_phase_current = 0;
}
bool OscFSK::next(bool bit, uint16_t* period) {
bool advance = false;
*period = freq[bit];
osc_phase_current += *period;
if(osc_phase_current > osc_phase_max) {
advance = true;
osc_phase_current -= osc_phase_max;
}
return advance;
}