d38535715b
adding some notes, tested both send and recieve, both work fine but shift to letters and figures still needs to be implemented
2015-01-24 22:17:18 +00:00
d962b12ac2
it works, may need some more testing but after calling and testing I'm able to read text from the microsoft customer support tty/tdd
2015-01-24 21:48:41 +00:00
7dfee8900b
working on adding tty/tdd support
2015-01-24 21:25:41 +00:00
ff47edfb68
minimodem: accept "uic*" for uic-ground
2014-11-16 12:46:14 -08:00
532bcfb84c
Honor --invert-start-stop in TX
2014-11-16 12:46:14 -08:00
25d01f73d8
Add UIC-751-3 decoding and optional MSB-first TX/RX
...
[ kamal: cleanup ]
2014-11-16 12:46:14 -08:00
ff0346f5a8
Really use 64 data types for demodulation
...
[ kamal: cleanup ]
2014-11-16 12:46:14 -08:00
2cdf2d29e4
build_expect_bits_string cleanup
2014-11-16 12:46:14 -08:00
bbf121a63f
Compute expected bit strings outside of main loop
2014-11-16 12:46:14 -08:00
cc6b5c9123
Change code to use 64-bit variables for decoding
2014-11-16 12:46:13 -08:00
909adf0d59
Add option to change start-stop polarity
2014-11-16 12:46:13 -08:00
746f0f6c7a
minimodem: free samplebuf to appease valgrind
2014-11-14 09:12:27 -08:00
ba5ecec2f7
update copyright dates 2014
2014-11-13 10:56:31 -08:00
a6a7e0da35
callerid: warn when used with --auto-carrier
2014-11-08 09:27:31 -08:00
151e360720
minimodem: -7 implements 7-bit ASCII
2013-09-17 07:56:20 -07:00
a524e38222
minimodem: fix --baudot cmdline switch
...
The --baudot (a.k.a. -5) command line switch didn't actually engage
the Baudot encoder/decoder, just set 5 bits per frame.
2013-09-05 15:36:49 -07:00
f9bdf43423
update copyright dates
2013-06-10 09:28:02 -07:00
0140e0df12
minimodem: --tx SAME emits 16 sync-byte preamble
...
Emit a preamble of 16 (hardcoded) sync-bytes if --sync-byte is
specified with --tx mode. This makes --tx SAME emit the required
preamble of 16 0xAB's automatically. So --rx SAME now directly
decodes the output of --tx SAME without needing to manually inject
the preamble byte(s), simplifying the test case.
Thanks to Harold Giddings, for reporting the issue.
2013-06-08 10:16:56 -07:00
24f1acff4f
minimodem: fsk_transmit_frame factored out
2013-06-08 10:04:06 -07:00
8876f6674a
minimodem: rename bfsk_sync_on_data to bfsk_do_rx_sync
2013-06-08 09:27:01 -07:00
d774ad74dd
minimodem: handle arbitrary --startbits N
...
minimodem --startbits N works for rx and tx, where (0 <= N <= 20).
Thanks Martyn (kronalias), for reporting.
2013-03-20 12:08:52 -07:00
7ab18a268f
minimodem: do not call setitimer(new_value=NULL)
...
Linux kernel warns:
minimodem calls setitimer() with new_value NULL pointer. Misfeature support
will be removed
Thanks Robert Hooker, for reporting.
2013-01-25 15:03:54 -08:00
032d0bb79c
minimodem: refine frame position if confidence falls
...
Allows for more accurate tracking, esp. for no-frame-bits protocols.
Fixes tests/test-80-SAME-datastream.
2012-11-03 14:20:33 -07:00
1446844d32
minimodem: do not transmit leader tone if no start bits
2012-11-03 14:10:44 -07:00
6ad778ce03
minimodem: fix --tx startbits/stopbits handling
...
Make --tx support specified --startbits and --stopbits; also enables --tx SAME.
Thanks to Jamie Batmanglidj for reporting the issue.
2012-11-01 12:48:40 -07:00
65493fa12a
minimodem: --rx callerid
...
New "callerid" baudmode supports Bell202 Caller-ID (MDMF or SDMF) prototol.
2012-10-05 19:40:17 -07:00
49ccd10e1f
minimodem: --rx prints all bytes unmolested, unless --print-filter
...
Now, minimodem prints all received bytes without isprint() filtering,
unless --print-filter is specified. Allows for binary file transfers
and multibyte characters.
2012-10-05 13:29:30 -07:00
761cf00b16
minimodem: handle SIGINT on --rx: close the sa backend and print stats
2012-10-02 14:22:38 -07:00
2373364d9a
minimodem: performance: read samples in larger blocks
...
For performance, read samples from the simpleaudio backend in larger
blocks when the number of bits per frame ends up being small.
2012-10-01 21:00:28 -07:00
6340365e2f
simpleaudio-sndfile: fix minimodem tx_interactive
...
Un-break tx_interactive: minimodem enables tx_interactive whenever the
stream_name is NULL, so go back to using the stream_name as the sndfile
filename.
2012-09-10 20:02:53 -07:00
9f1695a3b6
minimodem: fix --auto-carrier crash on positive-shift modes
2012-09-09 17:42:53 -07:00
d603fc444d
minimodem: --alsa[=plughw:X,Y]
2012-09-09 15:24:35 -07:00
fabd47ba99
minimodem: less aggressive refine on acquisition
2012-09-05 23:22:27 -07:00
c8dd7ac06b
minimodem: fix --rx-one
2012-09-05 09:37:06 -07:00
3a1469b85e
minimodem: fix usage message
2012-09-05 09:36:12 -07:00
30de59026b
minimodem: --inverted switches the mark/space freqs
2012-09-04 16:26:10 -07:00
8731b54bc2
minimodem: refine fsk frame position on carrier acquisition
...
FSK_ANALYZE_NSTEPS was previously 10.
Now FSK_ANALYZE_NSTEPS_CARRIER_LOCK is 100, and FSK_ANALYZE_NSTEPS is
reduced to 4.
(Also, try_confidence_search_limit = INFINITY on carrier acquisition frame).
Effects: Better initial phase lock on signal in the first
place; sloppier tracking of fast/slow signals; reduced longterm CPU load.
2012-09-03 23:31:16 -07:00
aa1124d6e7
minimodem: fix incorrect try_max_nsamples calculation
2012-09-02 14:25:43 -07:00
fd45b5571c
minimodem: restrict try_max_nsamples to 75% of a bit-width
...
... actually 125% of a bit width before acquiring carrier.
2012-09-02 14:27:04 -07:00
7b0e47ac4e
minimodem: --binary-output
2012-09-01 00:09:32 -07:00
a172268117
minimodem: auto get samplerate from audio files
2012-09-02 18:10:59 -07:00
0f3338a91b
minimodem: match sync_byte in the fsk layer
2012-09-02 12:02:06 -07:00
9187dd60a7
minimodem: --rx same (NOAA SAME protocol)
2012-09-01 13:34:50 -07:00
04cc215640
minimodem: --sync-byte {0xXX}
2012-09-01 14:54:32 -07:00
82c72352ab
minimodem: --startbits; deprecate -T
2012-09-01 13:33:49 -07:00
e2a51f093a
databits: split out the databits implementations
...
rename framebits to databits
added databits_binary decoder
2012-08-31 21:39:08 -07:00
a7d1602c9d
minimodem: calculate frame_bits_{mask,shift}
2012-08-31 20:42:05 -07:00
cbd048aac6
minimodem: bfsk_nstartsbits variable
...
- FIXME: doesn't actually implement the proper expect_bits string
- only useful for testing SAME decoder's hardcoded "dddddddd" expect_bits
2012-08-30 16:02:53 -07:00
7b34e89433
minimodem: --stopbits replaces --txstopbits; better bps metric
...
RX metrics account for fractional number of stop bits (e.g 1.5);
RX bps metric slightly more accurate (?).
2012-08-30 15:05:33 -07:00
becf16761e
minimodem: fsk confidence thresholds: thresh=1.5, limit=2.3
...
Note: fsk_confidence_thresh can now be reduced to 1.5 due to track_amplitude.
2012-08-26 15:16:49 -07:00
erratic