portapack-mayhem/firmware/application/apps/ui_adsb_tx.cpp

/*
 * Copyright (C) 2015 Jared Boone, ShareBrained Technology, Inc.
 * Copyright (C) 2016 Furrtek
 *
 * 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.
 */

#include "ui_adsb_tx.hpp"
#include "ui_alphanum.hpp"

#include "manchester.hpp"
#include "string_format.hpp"
#include "portapack.hpp"
#include "baseband_api.hpp"

#include <cstring>
#include <stdio.h>

using namespace adsb;
using namespace portapack;

namespace ui {

Compass::Compass(
    const Point parent_pos)
    : Widget{{parent_pos, {64, 64}}} {
}

void Compass::set_value(uint32_t new_value) {
    Point center = screen_pos() + Point(32, 32);

    new_value = range.clip(new_value);

    display.draw_line(
        center,
        center + polar_to_point(value_, 28),
        Color::dark_grey());

    display.draw_line(
        center,
        center + polar_to_point(new_value, 28),
        Color::green());

    value_ = new_value;
}

void Compass::paint(Painter&) {
    display.fill_circle(screen_pos() + Point(32, 32), 32, Color::dark_grey(), Color::black());

    display.fill_rectangle({screen_pos() + Point(32 - 2, 0), {4, 4}}, Color::black());       // N
    display.fill_rectangle({screen_pos() + Point(32 - 2, 64 - 4), {4, 4}}, Color::black());  // S
    display.fill_rectangle({screen_pos() + Point(0, 32 - 2), {4, 4}}, Color::black());       // W
    display.fill_rectangle({screen_pos() + Point(64 - 4, 32 - 2), {4, 4}}, Color::black());  // E

    set_value(value_);
}

ADSBPositionView::ADSBPositionView(
    NavigationView& nav,
    Rect parent_rect)
    : OptionTabView(parent_rect) {
    set_type("position");

    add_children({&geopos,
                  &button_set_map});

    geopos.set_altitude(36000);

    button_set_map.on_select = [this, &nav](Button&) {
        nav.push<GeoMapView>(
            geopos.altitude(),
            GeoPos::alt_unit::FEET,
            geopos.lat(),
            geopos.lon(),
            [this](int32_t altitude, float lat, float lon) {
                geopos.set_altitude(altitude);
                geopos.set_lat(lat);
                geopos.set_lon(lon);
            });
    };
}

void ADSBPositionView::collect_frames(const uint32_t ICAO_address, std::vector<ADSBFrame>& frame_list) {
    if (!enabled) return;

    ADSBFrame temp_frame;

    encode_frame_pos(temp_frame, ICAO_address, geopos.altitude(),
                     geopos.lat(), geopos.lon(), 0);

    frame_list.emplace_back(temp_frame);

    encode_frame_pos(temp_frame, ICAO_address, geopos.altitude(),
                     geopos.lat(), geopos.lon(), 1);

    frame_list.emplace_back(temp_frame);
}

ADSBCallsignView::ADSBCallsignView(
    NavigationView& nav,
    Rect parent_rect)
    : OptionTabView(parent_rect) {
    set_type("callsign");

    add_children({&labels_callsign,
                  &button_callsign});

    set_enabled(true);

    button_callsign.set_text(callsign);

    button_callsign.on_select = [this, &nav](Button&) {
        text_prompt(
            nav,
            callsign,
            8,
            [this](std::string& s) {
                button_callsign.set_text(s);
            });
    };
}

void ADSBCallsignView::collect_frames(const uint32_t ICAO_address, std::vector<ADSBFrame>& frame_list) {
    if (!enabled) return;

    ADSBFrame temp_frame;

    encode_frame_id(temp_frame, ICAO_address, callsign);

    frame_list.emplace_back(temp_frame);
}

ADSBSpeedView::ADSBSpeedView(
    Rect parent_rect)
    : OptionTabView(parent_rect) {
    set_type("speed");

    add_children({&labels_speed,
                  &labels_vert_rate,
                  &compass,
                  &field_angle,
                  &field_speed,
                  &field_vert_rate});

    field_angle.set_value(0);
    field_speed.set_value(400);
    field_vert_rate.set_value(0);

    field_angle.on_change = [this](int32_t v) {
        compass.set_value(v);
    };
}

void ADSBSpeedView::collect_frames(const uint32_t ICAO_address, std::vector<ADSBFrame>& frame_list) {
    if (!enabled) return;

    ADSBFrame temp_frame;

    encode_frame_velo(temp_frame, ICAO_address, field_speed.value(),
                      field_angle.value(), field_vert_rate.value());  // Added v_rate ,  ft/min  ,  (+) climb ,  (-) descend .

    frame_list.emplace_back(temp_frame);
}

ADSBSquawkView::ADSBSquawkView(
    Rect parent_rect)
    : OptionTabView(parent_rect) {
    set_type("squawk");

    add_children({&labels_squawk,
                  &field_squawk});
}

void ADSBSquawkView::collect_frames(const uint32_t /*ICAO_address*/, std::vector<ADSBFrame>& frame_list) {
    if (!enabled) return;

    ADSBFrame temp_frame;

    encode_frame_squawk(temp_frame, field_squawk.to_integer());

    frame_list.emplace_back(temp_frame);
}

ADSBTXThread::ADSBTXThread(
    std::vector<ADSBFrame> frames)
    : frames_{std::move(frames)} {
    thread = chThdCreateFromHeap(NULL, 1024, NORMALPRIO + 10, ADSBTXThread::static_fn, this);
}

ADSBTXThread::~ADSBTXThread() {
    if (thread) {
        chThdTerminate(thread);
        chThdWait(thread);
        thread = nullptr;
    }
}

msg_t ADSBTXThread::static_fn(void* arg) {
    auto obj = static_cast<ADSBTXThread*>(arg);
    obj->run();
    return 0;
}

void ADSBTXThread::run() {
    uint8_t* bin_ptr = shared_memory.bb_data.data;
    uint8_t* raw_ptr;
    uint32_t frame_index = 0;  //, plane_index = 0;
    // uint32_t regen = 0;
    // float offs = 0;

    while (!chThdShouldTerminate()) {
        /*if (!regen) {
                        regen = 10;

                        encode_frame_id(frames[0], plane_index, "DEMO" + to_string_dec_uint(plane_index));
                        encode_frame_pos(frames[1], plane_index, 5000, plane_lats[plane_index]/8 + offs + 38.5, plane_lons[plane_index]/8 + 125.8, 0);
                        encode_frame_pos(frames[2], plane_index, 5000, plane_lats[plane_index]/8 + offs + 38.5, plane_lons[plane_index]/8 + 125.8, 1);
                        encode_frame_identity(frames[3], plane_index, 1337);

                        if (plane_index == 11)
                                plane_index = 0;
                        else
                                plane_index++;

                        offs += 0.001;
                }*/

        memset(bin_ptr, 0, 256);  // 112 bits * 2 parts = 224 should be enough

        raw_ptr = frames_[frame_index].get_raw_data();

        // The preamble isn't manchester encoded
        memcpy(bin_ptr, adsb_preamble, 16);

        // Convert to binary (1 byte per bit, faster for baseband code)
        manchester_encode(bin_ptr + 16, raw_ptr, 112, 0);

        // Display in hex for debug
        // text_frame.set(to_string_hex_array(frames[0].get_raw_data(), 14));

        baseband::set_adsb();

        chThdSleepMilliseconds(50);

        frame_index++;
        if (frame_index >= frames_.size()) {
            frame_index = 0;
            // if (regen)
            //	regen--;
        }
    }
}

void ADSBTxView::focus() {
    tab_view.focus();
}

ADSBTxView::~ADSBTxView() {
    transmitter_model.disable();
    baseband::shutdown();
}

void ADSBTxView::generate_frames() {
    const uint32_t ICAO_address = sym_icao.to_integer();

    frames.clear();

    /* This scheme kinda sucks. Each "tab"'s collect_frames method
     * is called to generate its related frame(s). Getting values
     * from each widget of each tab would be better ?
     * */
    view_position.collect_frames(ICAO_address, frames);
    view_callsign.collect_frames(ICAO_address, frames);
    view_speed.collect_frames(ICAO_address, frames);
    view_squawk.collect_frames(ICAO_address, frames);

    // Show how many frames were generated
    // text_frame.set(to_string_dec_uint(frames.size()) + " frame(s).");
}

void ADSBTxView::start_tx() {
    generate_frames();

    /* Already tested , with SDR Angel + another Hackrf RX  and dump1090 + SDR RLT. Final conclusion is TX LPF 6 Mhz is
     * the best settings to fulfill ADSB transponder spectrum mask requirements (<=-20 dB's at +-7Mhz , <=-40 dB's at +-23Mhz )
     * and not showing any ADSB data decoding degradation.*/
    transmitter_model.set_baseband_bandwidth(6'000'000);  // best settings for ADSB TX.
    transmitter_model.enable();

    baseband::set_adsb();

    tx_thread = std::make_unique<ADSBTXThread>(frames);
}

ADSBTxView::ADSBTxView(
    NavigationView& nav)
    : nav_{nav} {
    baseband::run_image(portapack::spi_flash::image_tag_adsb_tx);

    add_children({&tab_view,
                  &labels,
                  &sym_icao,
                  &view_position,
                  &view_callsign,
                  &view_speed,
                  &view_squawk,
                  &text_frame,
                  &tx_view});

    tx_view.on_edit_frequency = [this, &nav]() {
        auto new_view = nav.push<FrequencyKeypadView>(transmitter_model.target_frequency());
        new_view->on_changed = [this](rf::Frequency f) {
            transmitter_model.set_target_frequency(f);
        };
    };

    tx_view.on_start = [this]() {
        start_tx();
        tx_view.set_transmitting(true);
    };

    tx_view.on_stop = [this]() {
        tx_view.set_transmitting(false);
        transmitter_model.disable();
    };
}

} /* namespace ui */