0bc8f551de
Use matched filter for AIS GMSK demodulation demo.
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Less than optimal for plain FSK, but flexible enough to also support GFSK/GMSK. Not at all optimized for SIMD instructions, so may not perform adequately at Bluetooth/GSM rates.
2015-11-06 09:40:00 -08:00
a9c190b6bb
Matched filter implementation.
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Essentially a complex FIR filter that's more flexible than the ones already in the code base. Refactor?!
2015-11-06 09:40:00 -08:00
6499de39bf
Shorten AIS packet to expected data + FCS length.
2015-11-06 09:40:00 -08:00
bd76f0e13b
Note to try different -mcpu= for LPC43xx Cortex-M0.
2015-11-06 09:40:00 -08:00
e9f28f9ef3
Provide configuration of symbol unstuffing.
2015-11-06 09:40:00 -08:00
a00fcbaa8f
Unstuffing pattern length of zero should never match.
2015-11-06 09:40:00 -08:00
05badaddda
Put symbol coding into PacketBuilder.
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Removes stuffing symbols before placing them into packet buffer.
2015-11-06 09:40:00 -08:00
c936e09702
Add bit unstuffing algorithm.
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For use in AIS. Probably useful elsewhere, too...
2015-11-06 09:39:59 -08:00
31ff13f1c0
Un-const Message in message handler interfaces.
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I want to modify in place the messages that are received. Naughty, but oh well.
2015-11-06 09:39:59 -08:00
5469a3a31d
Get ui::Console to a working state.
2015-11-06 09:39:59 -08:00
5c31e803c8
Change interface to AccessCodeCorrelator, inline in header.
2015-11-06 09:39:59 -08:00
a3cce5632e
Complete rewrite of clock recovery, lots of refactoring.
2015-11-06 09:39:59 -08:00
8b2e75a299
Add LinearResampler implementation for clock recovery.
2015-11-06 09:39:59 -08:00
f13e2d32c0
Add symbol coding namespace, NRZI decoder.
2015-11-06 09:39:59 -08:00
934936d3f6
Enhancements to clock recovery
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Linearly interpolate input and delayed samples, based on phase of internal symbol clock.
2015-11-06 09:39:59 -08:00
b41ff962f4
Replace std::sin() with interpolated LUT.
2015-10-14 11:10:24 -07:00
291de8f869
Change channel_spectrum type to std::complex<float>.
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Move FFT bit-reversal to complex<int16_t> -> complex<float> copy.
Change window so that adjacent bins have constant(-ish) gain.
Change window to float.
Change time domain samples to accumulate at even intervals over the FFT interval.
2015-10-14 11:10:24 -07:00
882fbbef31
Add more fft_swap bit reversal functions.
2015-10-14 11:10:24 -07:00
8f7e26b5c1
Break out BasebandStatsView, add main, RSSI threads.
2015-10-14 10:59:32 -07:00
7f46f0d071
Add tick tracking for all baseband threads.
2015-10-14 10:44:20 -07:00
aa733b1b61
Remove FSK from receiver menu. It doesn't do anything (yet).
2015-09-02 18:55:00 -07:00
f91f17b9fb
Increase touch sensitivity a bit.
2015-09-02 18:48:51 -07:00
9a3454d695
Touch code cleanup, stop scanning when no touch.
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No need to change voltages on touch panel when no touch is detected. This should reduce noise a bit.
2015-09-02 18:48:38 -07:00
f1ca3fe5bb
Switch RFFC5072, MAX2837 back to 40MHz reference.
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Turns out the MAX2837 can't tune the necessary range when given a 50MHz reference. Oops.
2015-09-02 17:45:19 -07:00
293337b647
Init radio in RX mode, not TX mode.
2015-09-02 17:30:16 -07:00
e2bb77d756
Change wideband FFT bin filter, clean up code a bit.
2015-09-02 11:29:38 -07:00
c4de9c4423
Mute audio whenever baseband mode is changed.
2015-09-01 21:05:47 -07:00
c52de7abe6
Clean up baseband/RSSI streaming control.
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Address hang-up of baseband and RSSI when switching modulation modes really fast.
2015-09-01 21:05:32 -07:00
687e627dae
Mechanism to clear waterfall when switching modulations.
2015-09-01 21:04:27 -07:00
d4c85bd786
Move receiver "back" button to separate row.
2015-09-01 20:38:59 -07:00
24e398ca62
Add HackRF mode explanation text.
2015-09-01 20:23:11 -07:00
4846557f12
Missed spots when renaming REVISION to GIT_REVISION.
2015-09-01 14:21:40 -07:00
5d8c636f40
Halt M4 right after sending M0 the shutdown message.
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Addresses issue #55 .
2015-09-01 13:49:09 -07:00
75d9aa9c73
Remove extra CPLD code internal signals.
2015-08-27 16:54:38 -07:00
19764ce693
Swap function of P2_8, P2_4 in schematic, firmware, CPLD.
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gpio_unused: P2_4 -> P2_8
gpio_lcd_rd: P2_8 -> P2_4
P2_8 is a very long line, shared with DFU button.
Revise schematic to match CPLD signal names.
2015-08-27 16:54:38 -07:00
3fea68d777
Adjust wideband specan gain to match other modes.
2015-08-27 14:57:05 -07:00
b13081696d
Simplify MessageQueue pop() usage.
2015-08-27 14:35:17 -07:00
d8b3b4cb6b
Check queue empty only once when reading messages.
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There was a second is_empty() call hidden in the pop() call, so the while(condition) was redundant.
2015-08-27 14:27:29 -07:00
5d9079f87f
Stop streaming when changing baseband configuration.
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Without, the baseband would get confused.
2015-08-27 14:07:15 -07:00
e751e10e45
Add wideband spectrum processor.
2015-08-27 13:57:31 -07:00
23ac04ad56
Make channel spectrum members protected, not private.
2015-08-27 13:51:55 -07:00
c7907e948c
Extract FSKProcessor into separate files.
2015-08-27 13:31:39 -07:00
ffe829cf67
Extract WidebandFMAudio into separate files.
2015-08-27 13:19:34 -07:00
7c5db55f8f
Extract NarrowbandFMAudio into separate files.
2015-08-27 13:14:45 -07:00
e246ea2c39
Extract NarrowbandAMAudio class into separate files.
2015-08-27 13:07:07 -07:00
6bf61cbe88
Extract BasebandProcessor into separate files.
2015-08-27 11:11:08 -07:00
b0e9afe26c
Add missing #includes.
2015-08-27 11:10:44 -07:00
04d05368c7
Push static variables and spectrum calc into BasebandProcessor.
2015-08-27 10:48:29 -07:00
de0777f476
Extract FMSquelch into separate files.
2015-08-27 09:59:03 -07:00
b904971ef2
Extract IIR filter configurations into separate file.
2015-08-27 09:58:37 -07:00
Jared Boone