Added morse receiver app. (#2923)

* Adder morse receiver app. Works with cw and fm mode. Adaptive speed learning. Logging.
2026-09-12 17:49:31 +00:00 · 2026-01-16 09:57:45 +01:00
parent 19eb1c40ab
commit 877ede5f86
18 changed files with 1265 additions and 17 deletions
@@ -0,0 +1,90 @@
+/*
+ * Copyright (C) 2026 Pezsma
+ *
+ * This file is part of PortaPack.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifndef __PROC_MORSE_H__
+#define __PROC_MORSE_H__
+
+#include "baseband_processor.hpp"
+#include "baseband_thread.hpp"
+#include "message.hpp"
+#include "dsp_decimate.hpp"
+#include "dsp_demodulate.hpp"
+#include "audio_output.hpp"
+#include "dsp_fir_taps.hpp"
+#include "rssi_thread.hpp"
+
+class MorseProcessor : public BasebandProcessor {
+   public:
+    MorseProcessor() {}
+
+    void execute(const buffer_c8_t& buffer) override;
+    void on_message(const Message* const p) override;
+    void update_goertzel_coeff(float freq);
+
+   private:
+    bool configured{false};
+
+    size_t baseband_fs = 3072000;
+
+    BasebandThread baseband_thread{baseband_fs, this, baseband::Direction::Receive};
+    RSSIThread rssi_thread{};
+
+    std::array<complex16_t, 512> dst_buffer{};
+    std::array<int16_t, 32> audio_buffer{};
+
+    dsp::decimate::FIRC8xR16x24FS4Decim8 decim_0{};
+    dsp::decimate::FIRC16xR16x32Decim8 decim_1{};
+    dsp::decimate::FIRAndDecimateComplex channel_filter{};
+    dsp::demodulate::FM demod{};
+    AudioOutput audio_output{};
+
+    // Goertzel and signal detection
+    int32_t coeff_int{0};
+    int32_t s_prev_i{0};
+    int32_t s_prev2_i{0};
+    uint32_t goertzel_count{0};
+    uint32_t duration_samples{0};
+    bool was_signaling{false};
+
+    // Variables required for measurement
+    int16_t prev_sample{0};
+    uint32_t zc_counter{0};
+    float current_freq{0.0f};
+
+    int32_t lpf_sample{0};
+    int32_t dc_offset{0};
+
+    // Squelch and stability
+    bool squelch_is_open{false};
+    int32_t squelch_hold{0};
+
+    int32_t user_squelch_level{0};
+    int64_t noise_floor{0};
+
+    int32_t startup_delay{0};    // Power-on delay
+    int32_t last_zc_counter{0};  // Previous ZC measurement for comparison
+
+    MorseRXDataMessage message{};
+
+    void configure();
+};
+
+#endif  // __PROC_MORSE_H__