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minimodem: make leader tone 2.0 bits long

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This commit is contained in:
Kamal Mostafa 2011-06-21 20:28:17 -07:00
parent 243af5da56
commit 65d0232c46
1 changed files with 4 additions and 2 deletions
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6
src/minimodem.c
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@ -84,7 +84,8 @@ static void fsk_transmit_stdin(
size_t bit_nsamples = sample_rate / data_rate + 0.5;
int c;
simpleaudio_tone(sa_out, bfsk_mark_f, sample_rate/2); // 0.5 sec leader
simpleaudio_tone(sa_out, bfsk_mark_f, bit_nsamples); // 2.0 bit leader
simpleaudio_tone(sa_out, bfsk_mark_f, bit_nsamples);
while ( (c = getchar()) != EOF )
{
@ -104,7 +105,8 @@ static void fsk_transmit_stdin(
simpleaudio_tone(sa_out, bfsk_mark_f, bit_nsamples); // stop
}
}
simpleaudio_tone(sa_out, bfsk_mark_f, sample_rate/2); // 0.5 sec tail
simpleaudio_tone(sa_out, bfsk_mark_f, bit_nsamples); // 2.0 bit tail
simpleaudio_tone(sa_out, bfsk_mark_f, bit_nsamples);
// 0.5 sec of zero samples to flush - FIXME lame
simpleaudio_tone(sa_out, 0, sample_rate/2);