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Add option for TX blanking to suppress decoder when transmitting for half-duplex audio

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zenith 2026-02-17 11:53:21 -05:00
commit be38e04153
3 changed files with 64 additions and 2 deletions
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22
tnc_ui.hh
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@ -102,6 +102,7 @@ struct TNCUIState {
float airtime_seconds = 0.0f;
int random_data_size = 0;
bool fragmentation_enabled = false;
bool tx_blanking_enabled = false;
// stats
std::atomic<float> total_tx_time{0.0f};
@ -415,6 +416,7 @@ struct TNCUIState {
fprintf(f, "slot_time_ms=%d\n", slot_time_ms);
fprintf(f, "p_persistence=%d\n", p_persistence);
fprintf(f, "fragmentation_enabled=%d\n", fragmentation_enabled ? 1 : 0);
fprintf(f, "tx_blanking_enabled=%d\n", tx_blanking_enabled ? 1 : 0);
fprintf(f, "# Audio/PTT\n");
fprintf(f, "audio_input=%s\n", audio_input_device.c_str());
fprintf(f, "audio_output=%s\n", audio_output_device.c_str());
@ -463,6 +465,7 @@ struct TNCUIState {
else if (strcmp(key, "slot_time_ms") == 0) slot_time_ms = atoi(value);
else if (strcmp(key, "p_persistence") == 0) p_persistence = atoi(value);
else if (strcmp(key, "fragmentation_enabled") == 0) fragmentation_enabled = atoi(value) != 0;
else if (strcmp(key, "tx_blanking_enabled") == 0) tx_blanking_enabled = atoi(value) != 0;
else if (strcmp(key, "audio_input") == 0) audio_input_device = value;
else if (strcmp(key, "audio_output") == 0) audio_output_device = value;
else if (strcmp(key, "audio_device") == 0) {
@ -740,6 +743,7 @@ private:
FIELD_THRESHOLD,
FIELD_PERSISTENCE,
FIELD_FRAGMENTATION,
FIELD_TX_BLANKING,
FIELD_AUDIO_INPUT,
FIELD_AUDIO_OUTPUT,
FIELD_PTT_TYPE,
@ -1241,6 +1245,11 @@ private:
state_.update_modem_info(); // Update random_data_size limits
state_.add_log("(!) Fragmentation changed, restart required");
break;
case FIELD_TX_BLANKING:
state_.tx_blanking_enabled = !state_.tx_blanking_enabled;
apply_settings();
state_.add_log(std::string("TX blanking ") + (state_.tx_blanking_enabled ? "enabled" : "disabled"));
break;
case FIELD_AUDIO_INPUT:
break;
case FIELD_AUDIO_OUTPUT:
@ -2281,6 +2290,19 @@ private:
if (dy >= 0) draw_toggle_field(dy, c1, c2, "Enabled", FIELD_FRAGMENTATION, state_.fragmentation_enabled);
row += 2;
// TX Blanking section
dy = visible_y(row);
if (dy >= 0) {
attron(A_DIM);
mvaddstr(dy, c1, "TX BLANKING");
attroff(A_DIM);
}
row++;
dy = visible_y(row);
if (dy >= 0) draw_toggle_field(dy, c1, c2, "Enabled", FIELD_TX_BLANKING, state_.tx_blanking_enabled);
row += 2;
// Audio / ptt
dy = visible_y(row);