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Added morse receiver app. (#2923)

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* Adder morse receiver app. Works with cw and fm mode. Adaptive speed learning. Logging.
This commit is contained in:
Pezsma
2026-01-16 09:57:45 +01:00
committed by GitHub
parent 19eb1c40ab
commit 877ede5f86
18 changed files with 1265 additions and 17 deletions
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firmware/application/external/morse_practice/morsedecoder.hpp
Vendored
+27 -12
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@@ -24,8 +24,7 @@
#include <cstdint>
#include <string>
#define MORSEDEC_ERROR "<ERR>"
#include "string_format.hpp"
namespace ui::external_app::morse_practice {
@@ -89,21 +88,28 @@ class MorseDecoder {
};
MorseDecoder() {}
DecodeResult handleInput(int32_t duration_ms) {
DecodeResult
handleInput(int32_t duration_ms) {
DecodeResult result = {"", 0.0};
if (duration_ms < 5 && duration_ms > -5) return result;
if (duration_ms > 0) {
pulse_history_.push_back(duration_ms);
double dah_prob = getDahProbability(duration_ms);
current_sequence_ += (dah_prob > 0.5) ? '-' : '.';
last_confidence_ = (dah_prob > 0.5) ? dah_prob : (1.0 - dah_prob);
last_sequence_ = current_sequence_;
} else {
uint32_t gap_duration = -duration_ms;
pulse_gaps_.push_back(gap_duration);
if (gap_duration >= getInterCharThreshold() && !current_sequence_.empty()) {
result.text = lookupMorse(current_sequence_);
result.confidence = (result.text != MORSEDEC_ERROR) ? last_confidence_ : 0.0;
result.confidence = (result.text[0] != '{') ? last_confidence_ : 0.0;
if (gap_duration >= getInterWordThreshold()) {
result.text += " ";
}
@@ -116,9 +122,9 @@ class MorseDecoder {
return result;
}
inline double getInterElementThreshold() { return time_unit_ms_ * 2.0; }
inline double getInterCharThreshold() { return time_unit_ms_ * 4.0; }
inline double getInterWordThreshold() { return time_unit_ms_ * 7.0; }
inline double getInterElementThreshold() { return time_unit_ms_ * 0.8; }
inline double getInterCharThreshold() { return time_unit_ms_ * 2.5; }
inline double getInterWordThreshold() { return time_unit_ms_ * 6.0; }
inline double getCurrentTimeUnit() { return time_unit_ms_; }
inline std::string getLastSequence() { return last_sequence_; }
@@ -126,7 +132,7 @@ class MorseDecoder {
private:
std::string current_sequence_ = "";
std::string last_sequence_ = "";
double time_unit_ms_ = 160.0;
double time_unit_ms_ = 119.0;
double last_confidence_ = 0.0;
MorseRingBuffer pulse_history_{};
MorseRingBuffer pulse_gaps_{};
@@ -136,7 +142,7 @@ class MorseDecoder {
if (seq == morse_table_[i].code)
return morse_table_[i].letter;
}
return MORSEDEC_ERROR; // not found
return "{" + seq + "}"; // not found
}
double getDahProbability(uint32_t duration_ms) {
@@ -298,8 +304,8 @@ class MorseDecoder {
time_unit_ms_ = (time_unit_ms_ * (1.0 - learning_factor)) + (new_time_unit * learning_factor);
}
size_t morse_table_size_ = 41;
MorseEntry morse_table_[41] = {
size_t morse_table_size_ = 50;
MorseEntry morse_table_[50] = {
{".-", "A"},
{"-...", "B"},
{"-.-.", "C"},
@@ -340,7 +346,16 @@ class MorseDecoder {
{"..--..", "?"},
{"-.-.--", "!"},
{"--..--", ","},
{"-...-", "="}};
{"-...-", "="},
{"-..-.", "/"},
{".--.-.", "@"},
{"---...", ":"},
{"-....-", "-"},
{".----.", "'"},
{".-..-.", "\""},
{"-.--.", "("},
{"-.--.-", ")"},
{".-.-.", "+"}};
};
} // namespace ui::external_app::morse_practice