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Add initial 750 Hz tone.

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This commit is contained in:
Jean-François DEL NERO 2026-05-23 13:56:29 +02:00
parent 227407e87e
commit db94c05c8b
1 changed files with 24 additions and 0 deletions
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24
src/pocsag/pocsag.c
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@ -684,6 +684,30 @@ int main(int argc, char* argv[])
i += BUFFER_IQ_SAMPLES_SIZE;
}
// Initial 750Hz tone
serial_init(&ser, 8, smprate, 750*2); // 750 Hz tone
i = 0;
while(i < (smprate/5)) // ~ 200 ms
{
for(j=0;j<BUFFER_IQ_SAMPLES_SIZE;j++)
{
if(serial_is_tx_reg_empty(&ser))
{
serial_tx_settxreg(&ser,0xAA);
}
iqgen.Frequency = ((double)CENTRAL_IF_FREQ + ( freqshift + ( (serial_tx_getlinestate(&ser) ) * ( -freqshift * 2 ) ) ) );
iq_wave_buf[j] = get_next_iq(&iqgen);
}
write_wave(wave1, &iq_wave_buf,BUFFER_IQ_SAMPLES_SIZE);
i += BUFFER_IQ_SAMPLES_SIZE;
}
serial_init(&ser, 8, smprate, baud);
// Main loop : Generate the message
while( !pocctx.frm_end || !serial_is_tx_reg_empty(&ser) )
{