Shows the algorithm to get que optimal Hi/Lo injection prior to a select frequency command.

select_frequency_hilo.cpp

void TEA5767N::selectFrequency(float frequency) {
  calculateOptimalHiLoInjection(frequency);
  transmitFrequency(frequency);
}

void TEA5767N::calculateOptimalHiLoInjection(float freq) {
  byte signalHigh;
  byte signalLow;
	
  setHighSideLOInjection();
  transmitFrequency((float) (freq + 0.45));
	
  signalHigh = getSignalLevel();
	
  setLowSideLOInjection();
  transmitFrequency((float) (freq - 0.45));
	
  signalLow = getSignalLevel();

  hiInjection = (signalHigh < signalLow) ? 1 : 0;
}