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Honor --invert-start-stop in TX

This commit is contained in:
Marcos Vives Del Sol 2014-08-27 11:58:14 +02:00 committed by Kamal Mostafa
parent 25d01f73d8
commit 532bcfb84c
1 changed files with 8 additions and 5 deletions
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13
src/minimodem.c
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@ -82,12 +82,13 @@ static void fsk_transmit_frame(
float bfsk_space_f,
float bfsk_nstartbits,
float bfsk_nstopbits,
int invert_start_stop,
int bfsk_msb_first
)
{
int i;
if ( bfsk_nstartbits > 0 )
simpleaudio_tone(sa_out, bfsk_space_f,
simpleaudio_tone(sa_out, invert_start_stop ? bfsk_mark_f : bfsk_space_f,
bit_nsamples * bfsk_nstartbits); // start
for ( i=0; i<n_data_bits; i++ ) { // data
unsigned int bit;
@ -101,7 +102,7 @@ static void fsk_transmit_frame(
simpleaudio_tone(sa_out, tone_freq, bit_nsamples);
}
if ( bfsk_nstopbits > 0 )
simpleaudio_tone(sa_out, bfsk_mark_f,
simpleaudio_tone(sa_out, invert_start_stop ? bfsk_space_f : bfsk_mark_f,
bit_nsamples * bfsk_nstopbits); // stop
}
@ -114,6 +115,7 @@ static void fsk_transmit_stdin(
int n_data_bits,
float bfsk_nstartbits,
float bfsk_nstopbits,
int invert_start_stop,
int bfsk_msb_first,
unsigned int bfsk_do_tx_sync_bytes,
unsigned int bfsk_sync_byte,
@ -159,19 +161,19 @@ static void fsk_transmit_stdin(
tx_transmitting = 1;
/* emit leader tone (mark) */
for ( j=0; j<tx_leader_bits_len; j++ )
simpleaudio_tone(sa_out, bfsk_mark_f, bit_nsamples);
simpleaudio_tone(sa_out, invert_start_stop ? bfsk_space_f : bfsk_mark_f, bit_nsamples);
/* emit "preamble" of sync bytes */
for ( j=0; j<bfsk_do_tx_sync_bytes; j++ )
fsk_transmit_frame(sa_out, bfsk_sync_byte, n_data_bits,
bit_nsamples, bfsk_mark_f, bfsk_space_f,
bfsk_nstartbits, bfsk_nstopbits, 0);
bfsk_nstartbits, bfsk_nstopbits, invert_start_stop, 0);
}
/* emit data bits */
for ( j=0; j<nwords; j++ )
fsk_transmit_frame(sa_out, bits[j], n_data_bits,
bit_nsamples, bfsk_mark_f, bfsk_space_f,
bfsk_nstartbits, bfsk_nstopbits, bfsk_msb_first);
bfsk_nstartbits, bfsk_nstopbits, invert_start_stop, bfsk_msb_first);
if ( tx_interactive )
setitimer(ITIMER_REAL, &itv, NULL);
@ -869,6 +871,7 @@ main( int argc, char*argv[] )
bfsk_n_data_bits,
bfsk_nstartbits,
bfsk_nstopbits,
invert_start_stop,
bfsk_msb_first,
bfsk_do_tx_sync_bytes,
bfsk_sync_byte,