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Update Kraken.cpp
- Fixed minor issues and added IQ data copying to blah2 buffers - (This is superfluous . read next comment) I haven't checked the gain validation routine, so I copied the valid values as a comment. I guess this will need separate validation somewhere. - I have also enabled auto gain after seeing it enabled in kraken's own firmware.
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1 changed files with 23 additions and 19 deletions
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@ -11,7 +11,7 @@ Kraken::Kraken(std::string _type, uint32_t _fc, uint32_t _fs,
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: Source(_type, _fc, _fs, _path, _saveIq)
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{
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// convert gain to tenths of dB
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for (int i = 0; i <= _gain.size(); i++)
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for (int i = 0; i < _gain.size(); i++)
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{
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gain.push_back(static_cast<int>(_gain[i]*10));
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channelIndex.push_back(i);
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@ -33,7 +33,9 @@ Kraken::Kraken(std::string _type, uint32_t _fc, uint32_t _fs,
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check_status(status, "Failed to close device for available gains.");
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// update gains to next value if invalid
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for (int i = 0; i <= _gain.size(); i++)
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// supported gain values (29): 0.0 0.9 1.4 2.7 3.7 7.7 8.7 12.5 14.4 15.7 16.6 19.7 20.7 22.9 25.4 28.0 29.7 32.8 33.8 36.4 37.2 38.6 40.2 42.1 43.4 43.9 44.5 48.0 49.6
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for (int i = 0; i < _gain.size(); i++)
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{
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int adjustedGain = static_cast<int>(_gain[i] * 10);
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auto it = std::lower_bound(validGains.begin(),
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@ -54,17 +56,17 @@ void Kraken::start()
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for (size_t i = 0; i < channelIndex.size(); i++)
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{
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std::cout << "[Kraken] Setting up channel " << i << "." << std::endl;
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rtlsdr_dev_t* dev;
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status = rtlsdr_open(&dev, i);
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status = rtlsdr_open(&devs[i], i);
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check_status(status, "Failed to open device.");
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devs.push_back(dev);
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status = rtlsdr_set_center_freq(devs[i], fc);
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check_status(status, "Failed to set center frequency.");
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status = rtlsdr_set_sample_rate(devs[i], fs);
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check_status(status, "Failed to set sample rate.");
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status = rtlsdr_set_dithering(devs[i], 0); // disable dither
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check_status(status, "Failed to disable dithering.");
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status = rtlsdr_set_tuner_gain_mode(devs[i], 1); // disable AGC
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status = rtlsdr_set_tuner_gain_mode(devs[i], 0); // enable AGC
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check_status(status, "Failed to disable AGC.");
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status = rtlsdr_set_tuner_gain(devs[i], gain[i]);
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check_status(status, "Failed to set gain.");
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@ -86,11 +88,8 @@ void Kraken::stop()
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void Kraken::process(IqData *buffer1, IqData *buffer2)
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{
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std::vector<std::thread> threads;
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for (size_t i = 0; i < channelIndex.size(); i++)
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{
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threads.emplace_back(rtlsdr_read_async, devs[i], callback, &channelIndex, 0, 16 * 16384);
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}
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threads.emplace_back(rtlsdr_read_async, devs[0], callback, buffer1, 0, 16 * 16384);
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threads.emplace_back(rtlsdr_read_async, devs[1], callback, buffer2, 0, 16 * 16384);
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// join threads
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for (auto& thread : threads) {
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thread.join();
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@ -99,13 +98,19 @@ void Kraken::process(IqData *buffer1, IqData *buffer2)
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void Kraken::callback(unsigned char *buf, uint32_t len, void *ctx)
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{
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int deviceIndex = *reinterpret_cast<int*>(ctx);
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// buffers[i]->lock();
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// for (size_t j = 0; j < n_read; j++)
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// {
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// buffers[i]->push_back({buffer[j].real(), buffer[j].imag()});
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// }
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// buffers[i]->unlock();
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IqData* buffer_blah2 = (IqData*)ctx;
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int8_t* buffer_kraken = (int8_t*)buf;
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buffer_blah2->lock();
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for (size_t i = 0; i < len; i += 2) {
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double iqi = static_cast<double>(buffer_kraken[i]);
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double iqq = static_cast<double>(buffer_kraken[i + 1]);
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buffer_blah2->push_back({iqi, iqq});
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}
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buffer_blah2->unlock();
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}
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void Kraken::replay(IqData *buffer1, IqData *buffer2, std::string _file, bool _loop)
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@ -120,4 +125,3 @@ void Kraken::check_status(int status, std::string message)
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throw std::runtime_error("[Kraken] " + message);
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}
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}
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