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Added CTCSS decoder in NFM RX

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RSSI output is now pitch instead of PWM
Disabled RSSI output in WBFM mode
This commit is contained in:
furrtek 2017-11-28 08:52:04 +01:00
parent f128b9b0b7
commit d77337dd77
19 changed files with 284 additions and 160 deletions
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28
firmware/application/analog_audio_app.cpp
View File

@ -26,6 +26,7 @@
#include "portapack.hpp"
#include "portapack_persistent_memory.hpp"
using namespace portapack;
using namespace tonekey;
#include "audio.hpp"
#include "file.hpp"
@ -97,6 +98,7 @@ AnalogAudioView::AnalogAudioView(
&field_vga,
&options_modulation,
&field_volume,
&text_ctcss,
&record_view,
&waterfall,
});
@ -203,6 +205,8 @@ void AnalogAudioView::remove_options_widget() {
options_widget.reset();
}
text_ctcss.hidden(true);
field_lna.set_style(nullptr);
options_modulation.set_style(nullptr);
field_frequency.set_style(nullptr);
@ -253,7 +257,7 @@ void AnalogAudioView::on_show_options_modulation() {
break;
case ReceiverModel::Mode::NarrowbandFMAudio:
widget = std::make_unique<NBFMOptionsView>(options_view_rect, &style_options_group);
widget = std::make_unique<NBFMOptionsView>(nbfm_view_rect, &style_options_group);
break;
default:
@ -262,6 +266,8 @@ void AnalogAudioView::on_show_options_modulation() {
set_options_widget(std::move(widget));
options_modulation.set_style(&style_options_group);
if (modulation == ReceiverModel::Mode::NarrowbandFMAudio) text_ctcss.hidden(false);
}
void AnalogAudioView::on_frequency_step_changed(rf::Frequency f) {
@ -326,4 +332,24 @@ void AnalogAudioView::squelched() {
if (exit_on_squelch) nav_.pop();
}
void AnalogAudioView::handle_coded_squelch(const uint32_t value) {
//const std::string value_string = to_string_dec_uint(value / 10) + "." + to_string_dec_uint(value % 10);
float diff, min_diff = value;
size_t min_idx { 0 };
size_t c;
for (c = 0; c < KEY_TONES_NB; c++) {
diff = abs(((float)value / 100.0) - tone_keys[c].second);
if (diff < min_diff) {
min_idx = c;
min_diff = diff;
}
}
if (min_diff < 40)
text_ctcss.set("CTCSS " + tone_keys[min_idx].first);
else
text_ctcss.set("???");
}
} /* namespace ui */

26
firmware/application/analog_audio_app.hpp
View File

@ -30,6 +30,8 @@
#include "ui_font_fixed_8x16.hpp"
#include "tone_key.hpp"
namespace ui {
constexpr Style style_options_group {
@ -68,7 +70,6 @@ private:
{ 0 * 8, 0 * 16, 2 * 8, 1 * 16 },
"BW",
};
OptionsField options_config {
{ 3 * 8, 0 * 16 },
4,
@ -80,14 +81,13 @@ private:
};
Text text_squelch {
{ 9 * 8, 0 * 16, 7 * 8, 1 * 16 },
"SQ /100"
{ 9 * 8, 0 * 16, 8 * 8, 1 * 16 },
"SQ /99"
};
NumberField field_squelch {
{ 12 * 8, 0 * 16 },
3,
{ 0, 100 },
2,
{ 0, 99 },
1,
' ',
};
@ -108,6 +108,7 @@ private:
static constexpr ui::Dim header_height = 3 * 16;
const Rect options_view_rect { 0 * 8, 1 * 16, 30 * 8, 1 * 16 };
const Rect nbfm_view_rect { 0 * 8, 1 * 16, 18 * 8, 1 * 16 };
NavigationView& nav_;
bool exit_on_squelch { false };
@ -155,6 +156,11 @@ private:
' ',
};
Text text_ctcss {
{ 19 * 8, 1 * 16, 11 * 8, 1 * 16 },
""
};
std::unique_ptr<Widget> options_widget { };
RecordView record_view {
@ -181,6 +187,7 @@ private:
void update_modulation(const ReceiverModel::Mode modulation);
void squelched();
void handle_coded_squelch(const uint32_t value);
MessageHandlerRegistration message_handler_squelch_signal {
Message::ID::RequestSignal,
@ -190,6 +197,13 @@ private:
}
};
MessageHandlerRegistration message_handler_coded_squelch {
Message::ID::CodedSquelch,
[this](const Message* const p) {
const auto message = *reinterpret_cast<const CodedSquelchMessage*>(p);
this->handle_coded_squelch(message.value);
}
};
};
} /* namespace ui */

5
firmware/application/baseband_api.cpp
View File

@ -171,10 +171,9 @@ void set_fifo_data(const int8_t * data) {
send_message(&message);
}
void set_pwmrssi(int32_t avg, bool enabled) {
const PWMRSSIConfigureMessage message {
void set_pitch_rssi(int32_t avg, bool enabled) {
const PitchRSSIConfigureMessage message {
enabled,
1000, // 1kHz
avg
};
send_message(&message);

2
firmware/application/baseband_api.hpp
View File

@ -63,7 +63,7 @@ void set_sstv_data(const uint8_t vis_code, const uint32_t pixel_duration);
void set_audiotx_data(const uint32_t divider, const uint32_t bw, const uint32_t gain_x10,
const uint32_t tone_key_delta, const float tone_key_mix_weight);
void set_fifo_data(const int8_t * data);
void set_pwmrssi(int32_t avg, bool enabled);
void set_pitch_rssi(int32_t avg, bool enabled);
void set_afsk_data(const uint32_t afsk_samples_per_bit, const uint32_t afsk_phase_inc_mark, const uint32_t afsk_phase_inc_space,
const uint8_t afsk_repeat, const uint32_t afsk_bw, const uint8_t symbol_count);
void kill_afsk();

3
firmware/application/tone_key.cpp
View File

@ -79,7 +79,8 @@ const tone_key_t tone_keys[] = {
{ "50 0Z", 254.100 },
{ "Axient 28kHz", 28000.0 },
{ "Sennheiser 32.768k", 32768.0 },
{ "Sennheiser 32kHz", 32000.0 },
{ "Sennheiser 32.000k", 32000.0 },
{ "Sony 32.382k", 32382.0 },
{ "Shure 19kHz", 19000.0 }
};

2
firmware/application/tone_key.hpp
View File

@ -28,7 +28,7 @@
using namespace ui;
#define KEY_TONES_NB (sizeof(tone_keys) / sizeof(tone_keys[0]))
#define KEY_TONES_NB 56
namespace tonekey {

25
firmware/application/ui_record_view.cpp
View File

@ -36,21 +36,20 @@ using namespace portapack;
namespace ui {
void RecordView::toggle_pwmrssi() {
pwmrssi_enabled = !pwmrssi_enabled;
void RecordView::toggle_pitch_rssi() {
pitch_rssi_enabled = !pitch_rssi_enabled;
// Send to RSSI widget
const PWMRSSIConfigureMessage message {
pwmrssi_enabled,
64,
const PitchRSSIConfigureMessage message {
pitch_rssi_enabled,
0
};
shared_memory.application_queue.push(message);
if( !pwmrssi_enabled ) {
button_pwmrssi.set_foreground(Color::orange());
if( !pitch_rssi_enabled ) {
button_pitch_rssi.set_foreground(Color::orange());
} else {
button_pwmrssi.set_foreground(Color::green());
button_pitch_rssi.set_foreground(Color::green());
}
}
@ -68,7 +67,7 @@ RecordView::RecordView(
{
add_children({
&rect_background,
&button_pwmrssi,
&button_pitch_rssi,
&button_record,
&text_record_filename,
&text_record_dropped,
@ -77,8 +76,8 @@ RecordView::RecordView(
rect_background.set_parent_rect({ { 0, 0 }, size() });
button_pwmrssi.on_select = [this](ImageButton&) {
this->toggle_pwmrssi();
button_pitch_rssi.on_select = [this](ImageButton&) {
this->toggle_pitch_rssi();
};
button_record.on_select = [this](ImageButton&) {
@ -238,8 +237,8 @@ void RecordView::update_status_display() {
text_record_dropped.set(s);
}
if (pwmrssi_enabled) {
button_pwmrssi.invert_colors();
if (pitch_rssi_enabled) {
button_pitch_rssi.invert_colors();
}
if( sampling_rate ) {

6
firmware/application/ui_record_view.hpp
View File

@ -64,7 +64,7 @@ public:
private:
void toggle();
void toggle_pwmrssi();
void toggle_pitch_rssi();
Optional<File::Error> write_metadata_file(const std::filesystem::path& filename);
void on_tick_second();
@ -73,7 +73,7 @@ private:
void handle_capture_thread_done(const File::Error error);
void handle_error(const File::Error error);
bool pwmrssi_enabled = false;
bool pitch_rssi_enabled = false;
const std::filesystem::path filename_stem_pattern;
const FileType file_type;
const size_t write_size;
@ -85,7 +85,7 @@ private:
Color::black()
};
ImageButton button_pwmrssi {
ImageButton button_pitch_rssi {
{ 2, 0 * 16, 3 * 8, 1 * 16 },
&bitmap_rssipwm,
Color::orange(),

13
firmware/application/ui_rssi.cpp
View File

@ -75,16 +75,13 @@ void RSSI::paint(Painter& painter) {
Color::black()
);
if (pwmrssi_enabled) {
const range_t<int> pwmrssi_avg_range { 0, 96 };
const auto pwmrssi_avg = pwmrssi_avg_range.clip((avg_ - raw_min) * 96 / raw_delta);
baseband::set_pwmrssi(pwmrssi_avg, true);
}
if (pitch_rssi_enabled)
baseband::set_pitch_rssi((avg_ - raw_min) * 2000 / raw_delta, true);
}
void RSSI::set_pwmrssi(bool enabled) {
pwmrssi_enabled = enabled;
if (!enabled) baseband::set_pwmrssi(0, false);
void RSSI::set_pitch_rssi(bool enabled) {
pitch_rssi_enabled = enabled;
if (!enabled) baseband::set_pitch_rssi(0, false);
}
void RSSI::on_statistics_update(const RSSIStatistics& statistics) {

12
firmware/application/ui_rssi.hpp
View File

@ -52,7 +52,7 @@ private:
int32_t avg_;
int32_t max_;
bool pwmrssi_enabled = false;
bool pitch_rssi_enabled = false;
MessageHandlerRegistration message_handler_stats {
Message::ID::RSSIStatistics,
@ -61,16 +61,16 @@ private:
}
};
MessageHandlerRegistration message_handler_pwmrssi {
Message::ID::PWMRSSIConfigure,
MessageHandlerRegistration message_handler_pitch_rssi {
Message::ID::PitchRSSIConfigure,
[this](const Message* const p) {
const auto message = *reinterpret_cast<const PWMRSSIConfigureMessage*>(p);
this->set_pwmrssi(message.enabled);
const auto message = *reinterpret_cast<const PitchRSSIConfigureMessage*>(p);
this->set_pitch_rssi(message.enabled);
}
};
void on_statistics_update(const RSSIStatistics& statistics);
void set_pwmrssi(bool enabled);
void set_pitch_rssi(bool enabled);
};
}

79
firmware/baseband/proc_nfm_audio.cpp
View File

@ -21,6 +21,7 @@
*/
#include "proc_nfm_audio.hpp"
#include "sine_table_int8.hpp"
#include "portapack_shared_memory.hpp"
#include "event_m4.hpp"
@ -29,7 +30,7 @@
#include <cstddef>
void NarrowbandFMAudio::execute(const buffer_c8_t& buffer) {
bool new_state;
//bool new_state;
if( !configured ) {
return;
@ -42,30 +43,63 @@ void NarrowbandFMAudio::execute(const buffer_c8_t& buffer) {
feed_channel_stats(channel_out);
channel_spectrum.feed(channel_out, channel_filter_pass_f, channel_filter_stop_f);
if (!pwmrssi_enabled) {
if (!pitch_rssi_enabled) {
// Normal mode, output demodulated audio
auto audio = demod.execute(channel_out, audio_buffer);
audio_output.write(audio);
} else {
for (c = 0; c < 32; c++) {
if (synth_acc < pwmrssi_avg)
pwmrssi_audio_buffer.p[c] = 32767;
else
pwmrssi_audio_buffer.p[c] = -32768;
if (synth_acc < synth_div)
synth_acc++;
else
synth_acc = 0;
if (ctcss_detect_enabled) {
/* 24kHz int16_t[16]
* -> FIR filter, <300Hz pass, >300Hz stop, gain of 1
* -> 12kHz int16_t[8] */
auto audio_ctcss = ctcss_filter.execute(audio, work_audio_buffer);
// s16 to f32 for hpf
std::array<float, 8> audio_f;
for (size_t i = 0; i < audio_ctcss.count; i++) {
audio_f[i] = audio_ctcss.p[i] * ki;
}
hpf.execute_in_place(buffer_f32_t {
audio_f.data(),
audio_ctcss.count,
audio_ctcss.sampling_rate
});
// Zero-crossing detection
for (size_t c = 0; c < audio_ctcss.count; c++) {
cur_sample = audio_f[c];
if (cur_sample * prev_sample < 0.0) {
z_acc += z_timer;
z_timer = 0;
z_count++;
} else
z_timer++;
prev_sample = cur_sample;
}
if (z_count >= 30) {
ctcss_message.value = (100 * 12000 / 2 * z_count) / z_acc;
shared_memory.application_queue.push(ctcss_message);
z_count = 0;
z_acc = 0;
}
}
} else {
// Direction-finding mode; output tone with pitch related to RSSI
for (size_t c = 0; c < 16; c++) {
tone_buffer.p[c] = (sine_table_i8[(tone_phase & 0xFF000000U) >> 24]) * 128;
tone_phase += tone_delta;
}
audio_output.write(pwmrssi_audio_buffer);
audio_output.write(tone_buffer);
new_state = audio_output.is_squelched();
/*new_state = audio_output.is_squelched();
if (new_state && !old_state)
shared_memory.application_queue.push(sig_message);
old_state = new_state;
old_state = new_state;*/
}
}
@ -84,8 +118,8 @@ void NarrowbandFMAudio::on_message(const Message* const message) {
capture_config(*reinterpret_cast<const CaptureConfigMessage*>(message));
break;
case Message::ID::PWMRSSIConfigure:
pwmrssi_config(*reinterpret_cast<const PWMRSSIConfigureMessage*>(message));
case Message::ID::PitchRSSIConfigure:
pitch_rssi_config(*reinterpret_cast<const PitchRSSIConfigureMessage*>(message));
break;
default:
@ -114,16 +148,15 @@ void NarrowbandFMAudio::configure(const NBFMConfigureMessage& message) {
channel_spectrum.set_decimation_factor(std::floor(channel_filter_output_fs / (channel_filter_pass_f + channel_filter_stop_f)));
audio_output.configure(message.audio_hpf_config, message.audio_deemph_config, (float)message.squelch_level / 100.0);
synth_acc = 0;
hpf.configure(audio_24k_hpf_30hz_config);
ctcss_filter.configure(taps_64_lp_025_025.taps);
configured = true;
}
void NarrowbandFMAudio::pwmrssi_config(const PWMRSSIConfigureMessage& message) {
pwmrssi_enabled = message.enabled;
pwmrssi_avg = message.avg / 3;
synth_div = message.synth_div;
synth_acc = 0;
void NarrowbandFMAudio::pitch_rssi_config(const PitchRSSIConfigureMessage& message) {
pitch_rssi_enabled = message.enabled;
tone_delta = (message.rssi + 1000) * ((1ULL << 32) / 24000);
}
void NarrowbandFMAudio::capture_config(const CaptureConfigMessage& message) {

45
firmware/baseband/proc_nfm_audio.hpp
View File

@ -29,6 +29,7 @@
#include "dsp_decimate.hpp"
#include "dsp_demodulate.hpp"
#include "dsp_iir.hpp"
#include "audio_output.hpp"
#include "spectrum_collector.hpp"
@ -52,16 +53,21 @@ private:
dst.data(),
dst.size()
};
std::array<float, 32> audio { };
const buffer_f32_t audio_buffer {
audio.data(),
audio.size()
const buffer_s16_t work_audio_buffer {
(int16_t*)dst.data(),
sizeof(dst) / sizeof(int16_t)
};
std::array<int16_t, 32> pwm { };
const buffer_s16_t pwmrssi_audio_buffer {
(int16_t*)pwm.data(),
sizeof(pwm) / sizeof(int16_t)
std::array<int16_t, 16> audio { };
const buffer_s16_t audio_buffer {
(int16_t*)audio.data(),
sizeof(audio) / sizeof(int16_t)
};
std::array<int16_t, 16> tone { };
const buffer_s16_t tone_buffer {
(int16_t*)tone.data(),
sizeof(tone) / sizeof(int16_t)
};
dsp::decimate::FIRC8xR16x24FS4Decim8 decim_0 { };
@ -70,24 +76,33 @@ private:
uint32_t channel_filter_pass_f = 0;
uint32_t channel_filter_stop_f = 0;
// For CTCSS decoding
dsp::decimate::FIR64AndDecimateBy2Real ctcss_filter { };
IIRBiquadFilter hpf { };
dsp::demodulate::FM demod { };
AudioOutput audio_output { };
bool old_state { };
SpectrumCollector channel_spectrum { };
unsigned int c { 0 }, synth_acc { 0 };
uint32_t synth_div { 0 };
bool pwmrssi_enabled = false;
uint32_t pwmrssi_avg { 0 };
uint32_t tone_phase { 0 };
uint32_t tone_delta { 0 };
bool pitch_rssi_enabled { false };
float cur_sample { }, prev_sample { };
uint32_t z_acc { 0}, z_timer { 0 }, z_count { 0 };
bool ctcss_detect_enabled { true };
static constexpr float k = 32768.0f;
static constexpr float ki = 1.0f / k;
bool configured { false };
void pwmrssi_config(const PWMRSSIConfigureMessage& message);
void pitch_rssi_config(const PitchRSSIConfigureMessage& message);
void configure(const NBFMConfigureMessage& message);
void capture_config(const CaptureConfigMessage& message);
RequestSignalMessage sig_message { RequestSignalMessage::Signal::Squelched };
//RequestSignalMessage sig_message { RequestSignalMessage::Signal::Squelched };
CodedSquelchMessage ctcss_message { 0 };
};
#endif/*__PROC_NFM_AUDIO_H__*/

72
firmware/baseband/proc_wfm_audio.cpp
View File

@ -45,49 +45,32 @@ void WidebandFMAudio::execute(const buffer_c8_t& buffer) {
channel_spectrum.feed(channel, channel_filter_pass_f, channel_filter_stop_f);
}
if ( !pwmrssi_enabled ) {
/* 384kHz complex<int16_t>[256]
* -> FM demodulation
* -> 384kHz int16_t[256] */
/* TODO: To improve adjacent channel rejection, implement complex channel filter:
* pass < +/- 100kHz, stop > +/- 200kHz
*/
/* 384kHz complex<int16_t>[256]
* -> FM demodulation
* -> 384kHz int16_t[256] */
/* TODO: To improve adjacent channel rejection, implement complex channel filter:
* pass < +/- 100kHz, stop > +/- 200kHz
*/
auto audio_oversampled = demod.execute(channel, work_audio_buffer);
auto audio_oversampled = demod.execute(channel, work_audio_buffer);
/* 384kHz int16_t[256]
* -> 4th order CIC decimation by 2, gain of 1
* -> 192kHz int16_t[128] */
auto audio_4fs = audio_dec_1.execute(audio_oversampled, work_audio_buffer);
/* 384kHz int16_t[256]
* -> 4th order CIC decimation by 2, gain of 1
* -> 192kHz int16_t[128] */
auto audio_4fs = audio_dec_1.execute(audio_oversampled, work_audio_buffer);
/* 192kHz int16_t[128]
* -> 4th order CIC decimation by 2, gain of 1
* -> 96kHz int16_t[64] */
auto audio_2fs = audio_dec_2.execute(audio_4fs, work_audio_buffer);
/* 192kHz int16_t[128]
* -> 4th order CIC decimation by 2, gain of 1
* -> 96kHz int16_t[64] */
auto audio_2fs = audio_dec_2.execute(audio_4fs, work_audio_buffer);
/* 96kHz int16_t[64]
* -> FIR filter, <15kHz (0.156fs) pass, >19kHz (0.198fs) stop, gain of 1
* -> 48kHz int16_t[32] */
auto audio = audio_filter.execute(audio_2fs, work_audio_buffer);
/* 96kHz int16_t[64]
* -> FIR filter, <15kHz (0.156fs) pass, >19kHz (0.198fs) stop, gain of 1
* -> 48kHz int16_t[32] */
auto audio = audio_filter.execute(audio_2fs, work_audio_buffer);
/* -> 48kHz int16_t[32] */
audio_output.write(audio);
} else {
for (c = 0; c < 32; c++) {
if (synth_acc < pwmrssi_avg)
pwmrssi_audio_buffer.p[c] = 32767;
else
pwmrssi_audio_buffer.p[c] = -32768;
if (synth_acc < synth_div) // 48kHz / 96 = 500Hz
synth_acc++;
else
synth_acc = 0;
}
/* -> 48kHz int16_t[32] */
audio_output.write(pwmrssi_audio_buffer);
}
/* -> 48kHz int16_t[32] */
audio_output.write(audio);
}
@ -106,10 +89,6 @@ void WidebandFMAudio::on_message(const Message* const message) {
capture_config(*reinterpret_cast<const CaptureConfigMessage*>(message));
break;
case Message::ID::PWMRSSIConfigure:
pwmrssi_config(*reinterpret_cast<const PWMRSSIConfigureMessage*>(message));
break;
default:
break;
}
@ -137,18 +116,9 @@ void WidebandFMAudio::configure(const WFMConfigureMessage& message) {
channel_spectrum.set_decimation_factor(1);
synth_acc = 0;
configured = true;
}
void WidebandFMAudio::pwmrssi_config(const PWMRSSIConfigureMessage& message) {
pwmrssi_enabled = message.enabled;
pwmrssi_avg = message.avg;
synth_div = message.synth_div;
synth_acc = 0;
}
void WidebandFMAudio::capture_config(const CaptureConfigMessage& message) {
if( message.config ) {
audio_output.set_stream(std::make_unique<StreamInput>(message.config));

12
firmware/baseband/proc_wfm_audio.hpp
View File

@ -56,12 +56,6 @@ private:
sizeof(dst) / sizeof(int16_t)
};
std::array<int16_t, 32> pwm { };
const buffer_s16_t pwmrssi_audio_buffer {
(int16_t*)pwm.data(),
sizeof(pwm) / sizeof(int16_t)
};
dsp::decimate::FIRC8xR16x24FS4Decim4 decim_0 { };
dsp::decimate::FIRC16xR16x16Decim2 decim_1 { };
uint32_t channel_filter_pass_f = 0;
@ -78,13 +72,7 @@ private:
size_t spectrum_interval_samples = 0;
size_t spectrum_samples = 0;
unsigned int c { 0 }, synth_acc { 0 };
uint32_t synth_div { 0 };
bool pwmrssi_enabled { false };
uint32_t pwmrssi_avg { 0 };
bool configured { false };
void pwmrssi_config(const PWMRSSIConfigureMessage& message);
void configure(const WFMConfigureMessage& message);
void capture_config(const CaptureConfigMessage& message);
};

47
firmware/common/dsp_fir_taps.hpp
View File

@ -1,5 +1,6 @@
/*
* Copyright (C) 2015 Jared Boone, ShareBrained Technology, Inc.
* Copyright (C) 2017 Furrtek
*
* This file is part of PortaPack.
*
@ -115,7 +116,7 @@ constexpr fir_taps_real<32> taps_11k0_channel {
} },
};
/// NBFM 8K50F3E emission type ////////////////////////////////////////////
// NBFM 8K50F3E emission type /////////////////////////////////////////////
// IFIR image-reject filter: fs=3072000, pass=4250, stop=340250, decim=8, fout=384000
constexpr fir_taps_real<24> taps_4k25_decim_0 {
@ -152,6 +153,50 @@ constexpr fir_taps_real<32> taps_4k25_channel {
} },
};
/* CTCSS audio filter */
/* 12kHz int16_t input
* -> FIR filter, <300Hz pass, >300Hz stop, gain of 1
* -> 6kHz int16_t output, gain of 1.0 (I think).
* Padded to multiple of four taps for unrolled FIR code.
* sum(abs(taps)): 125270
*/
/*constexpr fir_taps_real<64> taps_64_lp_025_025 {
.pass_frequency_normalized = 0.025f,
.stop_frequency_normalized = 0.025f,
.taps = { {
0, 0, -3, -7, -13, -20, -27, -32,
-34, -33, -25, -10, 13, 47, 94, 152,
223, 307, 402, 508, 622, 742, 866, 991,
1113, 1229, 1336, 1430, 1510, 1571, 1614, 1635,
1635, 1614, 1571, 1510, 1430, 1336, 1229, 1113,
991, 866, 742, 622, 508, 402, 307, 223,
152, 94, 47, 13, -10, -25, -33, -34,
-32, -27, -20, -13, -7, -3, 0, 0
} },
};*/
/* CTCSS audio filter */
/* 24kHz int16_t input
* -> FIR filter, <300Hz pass, >300Hz stop, gain of 1
* -> 12kHz int16_t output, gain of 1.0 (I think).
* Padded to multiple of four taps for unrolled FIR code.
* sum(abs(taps)): 125270
*/
constexpr fir_taps_real<64> taps_64_lp_025_025 {
.pass_frequency_normalized = 0.0125f,
.stop_frequency_normalized = 0.0125f,
.taps = { {
0, 0, 2, 6, 12, 20, 32, 46,
64, 85, 110, 138, 169, 204, 241, 281,
323, 367, 412, 457, 502, 547, 590, 631,
669, 704, 735, 762, 784, 801, 812, 818,
818, 812, 801, 784, 762, 735, 704, 669,
631, 590, 547, 502, 457, 412, 367, 323,
281, 241, 204, 169, 138, 110, 85, 64,
46, 32, 20, 12, 6, 2, 0, 0
} },
};
// DSB AM 6K00A3E emission type ///////////////////////////////////////////
// IFIR image-reject filter: fs=3072000, pass=3000, stop=339000, decim=8, fout=384000

7
firmware/common/dsp_iir_config.hpp
View File

@ -1,5 +1,6 @@
/*
* Copyright (C) 2015 Jared Boone, ShareBrained Technology, Inc.
* Copyright (C) 2017 Furrtek
*
* This file is part of PortaPack.
*
@ -43,6 +44,12 @@ constexpr iir_biquad_config_t audio_24k_hpf_300hz_config {
};
// scipy.signal.butter(2, 30 / 12000.0, 'highpass', analog=False)
constexpr iir_biquad_config_t audio_24k_hpf_30hz_config {
{ 0.99446179f, -1.98892358f, 0.99446179f },
{ 1.00000000f, -1.98889291f, 0.98895425f }
};
// scipy.signal.butter(2, 300 / 8000.0, 'highpass', analog=False)
constexpr iir_biquad_config_t audio_16k_hpf_300hz_config {
{ 0.92006616f, -1.84013232f, 0.92006616f },

30
firmware/common/message.hpp
View File

@ -80,7 +80,7 @@ public:
TonesConfigure = 32,
AFSKTxConfigure = 33,
PWMRSSIConfigure = 34,
PitchRSSIConfigure = 34,
OOKConfigure = 35,
RDSConfigure = 36,
AudioTXConfig = 37,
@ -103,6 +103,7 @@ public:
FIFOData = 61,
AudioLevelReport = 70,
CodedSquelch = 71,
MAX
};
@ -351,6 +352,18 @@ public:
uint32_t value;
};
class CodedSquelchMessage : public Message {
public:
constexpr CodedSquelchMessage(
const uint32_t value
) : Message { ID::CodedSquelch },
value { value }
{
}
uint32_t value;
};
class ShutdownMessage : public Message {
public:
constexpr ShutdownMessage(
@ -667,22 +680,19 @@ public:
const bool trigger_word;
};
class PWMRSSIConfigureMessage : public Message {
class PitchRSSIConfigureMessage : public Message {
public:
constexpr PWMRSSIConfigureMessage(
constexpr PitchRSSIConfigureMessage(
const bool enabled,
const uint32_t synth_div,
const int32_t avg
) : Message { ID::PWMRSSIConfigure },
const int32_t rssi
) : Message { ID::PitchRSSIConfigure },
enabled(enabled),
synth_div(synth_div),
avg(avg)
rssi(rssi)
{
}
const bool enabled;
const uint32_t synth_div;
const int32_t avg;
const int32_t rssi;
};
class TonesConfigureMessage : public Message {

BIN
firmware/portapack-h1-havoc.bin
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20
firmware/tools/fir_lpf.py Normal file
View File

@ -0,0 +1,20 @@
import math
m = 64 - 1
ft = 300.0 / 24000.0
taps = []
window = []
print("Normalized ft = " + str(ft))
for n in range(0, 64):
taps.append(math.sin(2 * math.pi * ft * (n - (m / 2.0))) / (math.pi * (n - (m / 2.0))))
for n in range(0, 64):
window.append(0.5 - 0.5 * math.cos(2 * math.pi * n / m))
for n in range(0, 64):
taps[n] = int(taps[n] * window[n] * 32768)
print(taps)