PPT active logic

[4x4eb]

hi everybody

where can one change the PTT active logic?\

Eitan

[onemikedelta]

Hi Eitan,
I am not sure about this solution but give it a chance. Replace following code block in AFSK.c file. In addition to this probably you are going to need to initialize that pin to output high in setup function.

ISR(ADC_vect) {
    TIFR1 = _BV(ICF1);
    AFSK_adc_isr(AFSK_modem, ((int16_t)((ADC) >> 2) - 128));
    if (hw_afsk_dac_isr) {
        DAC_PORT = (AFSK_dac_isr(AFSK_modem) & 0xF0); 
    } else {
        DAC_PORT = 136;
    }
    ++_clock;
}