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Author SHA1 Message Date
Thomas Kolb 0fc63f5f69 HAM-64 address format implementation 2024-07-01 20:58:20 +02:00
Thomas Kolb b6f040ebc7 Implement layer 2 header packing and unpacking 2024-06-30 17:39:56 +02:00
Thomas Kolb cadfd63997 Start defining layer2 structures 2024-06-30 16:18:11 +02:00
Thomas Kolb 2fefbc7f8c doc: ignore generated diagrams 2024-06-30 15:57:47 +02:00
Thomas Kolb 1840b3099c doc: add some message sequence charts 
- Connection establishment
- Connection close
- Packet transfer
 2024-06-22 01:29:29 +02:00
Thomas Kolb 95d9eda0a0 doc: add introduction + some more ideas 2024-06-08 11:49:43 +02:00
Thomas Kolb dde4e5ba7d doc: moved CRC from layer 1 to layer 2 2024-06-08 11:34:52 +02:00
Thomas Kolb c45eb4e334 doc: define connectionless frame type 2024-06-08 11:34:52 +02:00
Thomas Kolb 6fe9fdbe2b doc: minor clarifications 2024-06-08 11:34:52 +02:00
Thomas Kolb 8fb345b27c doc: automatic packet repetition algorithm 2024-06-08 11:34:52 +02:00
Thomas Kolb 6065157023 doc: added Makefile 2024-06-08 11:34:52 +02:00
Thomas Kolb 698cf74f3a doc: document data whitening procedure 2024-06-08 11:34:52 +02:00
Thomas Kolb ccc4e452ff doc: start defining the layer 2 2024-06-08 11:34:52 +02:00
Thomas Kolb fe5bcabd14 doc: document burst format 2024-06-08 11:34:52 +02:00
Thomas Kolb be0cac13c1 Starting to write the documentation with AsciiDoc 2024-06-08 11:34:52 +02:00
Thomas Kolb fd17ef3c1e Use full preamble for frequency estimation 2024-06-08 01:57:43 +02:00
Thomas Kolb 26a2558535 Add differential part to coarse frequency control 2024-06-08 01:54:42 +02:00
Thomas Kolb 2f2834026e Fix size of transmitted packets 2024-06-01 16:47:10 +02:00
Thomas Kolb de0f3620e6 Move hexdump() function to utils 2024-06-01 16:04:17 +02:00
Thomas Kolb 692780b313 setup_tundev.sh: fix shebang 2024-05-31 20:09:53 +02:00
Thomas Kolb 24bc1f8140 Fixed packet size with appended CRC 2024-05-31 18:36:16 +02:00
Thomas Kolb f6404dd0ea Move payload CRC to layer 2 
Layer 1 only does decoding of the FEC, but the CRC check for data integrity is
done in layer 2 now.
 2024-05-31 17:25:50 +02:00
Thomas Kolb 0e8e049e0a Replace all perror() calls with LOG() 2024-05-30 11:02:08 +02:00
Thomas Kolb 65daa182ef Use the new logging system everywhere 2024-05-30 10:49:43 +02:00
Thomas Kolb d6eaef91cd Switch to new logging system 
The new system supports:

- time-tagging of log messages
- message priority levels with a threshold below which they are not printed
- colored output of the message priority for easy identification
- compile-time disabling of all logging per C module

So far, it is integrated in the main and rx modules which generate most
messages. Other modules will be migrated in the future.
 2024-05-28 23:53:11 +02:00
Thomas Kolb d60788b6ad Config changes known to work with two directly connected HackRFs 2024-05-28 20:00:46 +02:00
Thomas Kolb 91facbf699 rx: reset internal state when restarting after a transmission 2024-05-28 19:55:21 +02:00
Simon Ruderich d5aeb6c0bc visualizer: make it optional to dup JSON to file 2024-05-28 08:59:06 +02:00
Simon Ruderich 570c379bc5 visualizer: always use === for comparisons 2024-05-28 08:51:56 +02:00
Simon Ruderich 21220deed7 visualizer: draw marker in history plot after selecting a packet 2024-05-28 08:51:56 +02:00
Simon Ruderich 7024964cae visualizer: use multiple plots for history 2024-05-28 08:51:56 +02:00
Simon Ruderich a2e23fceff visualizer: limit history plot to 300 packets 
The drawing gets slow with too many points.
 2024-05-28 08:51:56 +02:00
Simon Ruderich bc2f5ca76c visualizer: assign id to identify packets 
The id is displayed in the graph, the packet information and in the
trace (on mouse over).
 2024-05-28 08:51:56 +02:00
Simon Ruderich c5024a0b30 visualizer: skip redraws when they take too long 2024-05-28 08:51:56 +02:00
Simon Ruderich c63f7e8b57 visualizer: treat -1e38 as NaN 
I considered updating jsonlogger.c to represent NaN as "null" in the
JSON. However, this makes the hand-written JSON generator much more
complicated.
 2024-05-28 08:51:56 +02:00
Simon Ruderich 53190cd17c visualizer: don't use fixed scales 
We might get (unexpected) input which is outside of the usual range.
 2024-05-28 08:51:56 +02:00
Simon Ruderich 6fc4df205c Add HTML/JS visualizer with plots and graphs 2024-05-28 08:51:56 +02:00
Simon Ruderich 5fb5a2908d jsonlogger: increase pipe buffer to reduce likelihood of corrupted messages 
Our JSON messages can get rather large which can cause a buffer overrun
when the reading program is not scheduled at the same time. When the
kernel returns EAGAIN we abort writing the current JSON message.
However, the unfinished (and thus invalid) JSON message is still in the
pipe and will be processed by the reading program.

Increase the pipe buffer from the default 65536 to reduce the likelihood
of this happening. It's difficult to completely prevent the issue as we
don't want to slow down the main program due to slow logging.
 2024-05-28 08:51:56 +02:00
Simon Ruderich 657ac4faa3 test_rx_file: add JSON logging (controllable via JSONLOGGER define) 2024-05-28 08:51:56 +02:00
Thomas Kolb 33df7132ef rx: tag most debug messages with the sample index 2024-05-25 18:24:40 +02:00
Thomas Kolb 5f8346d290 agc: update squelch threshold more often 
This fixes the noise level tracking in test cases like the loopback
test where the signal has already ramped up before the first noise level
update.
 2024-05-25 18:16:24 +02:00
Thomas Kolb ca241f266b rx: add monotonic sample counter for debug messages 2024-05-25 18:15:23 +02:00
Simon Ruderich 0237ea6494 tests: fix compile 2024-05-09 18:32:51 +02:00
Simon Ruderich a4e55f781b Always NUL-terminate path in jsonlogger_init() 2024-05-09 18:32:26 +02:00
Simon Ruderich f689c4ec15 Fix compiler warnings 
- implicit declaration of built-in function 'strncpy'
- control reaches end of non-void function
- assignment to 'void (*)(int,  siginfo_t *, void *)' from incompatible pointer type 'void (*)(int)'
 2024-05-09 14:37:39 +02:00
Thomas Kolb a42d795002 Dump debug info from the RX via jsonlogger 2024-05-07 21:40:29 +02:00
Thomas Kolb 5bcd3a6933 jsonlogger: add test file and improve open/close behaviour 2024-05-05 18:40:50 +02:00
Thomas Kolb 251aca7738 Basic implementation of a JSON logger module 2024-05-05 18:09:00 +02:00
Thomas Kolb 033c26bcae preamble: invert symbols to match BPSK convention 2024-04-27 22:42:32 +02:00
Thomas Kolb c6ea578808 sdr: fix loss of samples due to unaligned buffer reads 
sdr_rf_to_baseband() processes samples in blocks of size SDR_OVERSAMPLING. If
the total number of samples does not align with this block size, the leftover
samples are lost and phase and timing glitches result.

To mitigate this, sdr_receive() now has an additional parameter that specifies
the alignment of the returned data. The number of samples returned is always a
multiple of this alignment factor. This feature is used to ensure that the
number of returned samples is a multiple of SDR_OVERSAMPLING and therefore no
samples are lost in sdr_rf_to_baseband().

sdr_rf_to_baseband() now has an additional check that makes the function fail
if the alignment is incorrect.
 2024-04-27 20:08:04 +02:00