mayhem-firmware/firmware/application/apps/ui_morse.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_morse.hpp"

#include "portapack.hpp"
#include "baseband_api.hpp"
#include "hackrf_gpio.hpp"
#include "portapack_shared_memory.hpp"
#include "cpld_update.hpp"
#include "ui_textentry.hpp"
#include "string_format.hpp"

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

using namespace portapack;
using namespace morse;
using namespace hackrf::one;

namespace ui {

static WORKING_AREA(ookthread_wa, 256);

static msg_t ookthread_fn(void* arg) {
    uint32_t v = 0, delay = 0;
    uint8_t* message_symbols = shared_memory.bb_data.tones_data.message;
    uint8_t symbol;
    MorseView* arg_c = (MorseView*)arg;

    chRegSetThreadName("ookthread");

    for (uint32_t i = 0; i < arg_c->symbol_count; i++) {
        if (chThdShouldTerminate()) break;

        symbol = message_symbols[i];

        v = (symbol < 2) ? 1 : 0;  // TX on for dot or dash, off for pause
        delay = morse_symbols[symbol];

        gpio_og_tx.write(v);
        arg_c->on_tx_progress(i, false);

        chThdSleepMilliseconds(delay * arg_c->time_unit_ms);
    }

    gpio_og_tx.write(0);  // Ensure TX is off
    arg_c->on_tx_progress(0, true);
    chThdExit(0);

    return 0;
}

static msg_t loopthread_fn(void* arg) {
    MorseView* arg_c = (MorseView*)arg;
    uint32_t wait = arg_c->loop;

    chRegSetThreadName("loopthread");

    for (uint32_t i = 0; i < wait; i++) {
        if (chThdShouldTerminate()) break;

        arg_c->on_loop_progress(i, false);
        chThdSleepMilliseconds(1000);
    }

    arg_c->on_loop_progress(0, true);
    chThdExit(0);

    return 0;
}

void MorseView::on_set_text(NavigationView& nav) {
    text_prompt(nav, buffer, 28);
}

void MorseView::focus() {
    button_message.focus();
}

MorseView::~MorseView() {
    // save app settings
    app_settings.tx_frequency = transmitter_model.tuning_frequency();
    settings.save("tx_morse", &app_settings);

    transmitter_model.disable();
    hackrf::cpld::load_sram_no_verify();  // to leave all RX ok, without ghost signal problem at the exit .
    baseband::shutdown();                 // better this function at the end, not load_sram() that sometimes produces hang up.
}

void MorseView::paint(Painter&) {
    message = buffer;
    text_message.set(message);
    update_tx_duration();
}

bool MorseView::start_tx() {
    // Re-generate message, just in case
    update_tx_duration();

    if (!symbol_count) {
        nav_.display_modal("Error", "Message too long,\nmust be < 256 symbols.", INFO, nullptr);
        return false;
    }

    progressbar.set_max(symbol_count);

    transmitter_model.set_sampling_rate(1536000U);
    transmitter_model.set_baseband_bandwidth(1750000);
    transmitter_model.enable();

    if (modulation == CW) {
        ookthread = chThdCreateStatic(ookthread_wa, sizeof(ookthread_wa), NORMALPRIO + 10, ookthread_fn, this);
    } else if (modulation == FM) {
        baseband::set_tones_config(transmitter_model.channel_bandwidth(), 0, symbol_count, false, false);
    }

    return true;
}

void MorseView::update_tx_duration() {
    uint32_t duration_ms;

    time_unit_ms = 1200 / field_speed.value();
    symbol_count = morse_encode(message, time_unit_ms, field_tone.value(), &time_units);

    if (symbol_count) {
        duration_ms = time_units * time_unit_ms;
        text_tx_duration.set(to_string_dec_uint(duration_ms / 1000) + "." + to_string_dec_uint((duration_ms / 100) % 10, 1) + "s   ");
    } else {
        text_tx_duration.set("-");  // Error
    }
}

void MorseView::on_tx_progress(const uint32_t progress, const bool done) {
    if (done) {
        transmitter_model.disable();
        progressbar.set_value(0);

        if (loop && run) {
            text_tx_duration.set("wait");
            progressbar.set_max(loop);
            progressbar.set_value(0);

            if (loopthread) {
                chThdRelease(loopthread);
                loopthread = nullptr;
            }

            loopthread = chThdCreateFromHeap(NULL, 1024, NORMALPRIO, loopthread_fn, this);
        } else {
            tx_view.set_transmitting(false);
        }
    } else
        progressbar.set_value(progress);
}

void MorseView::on_loop_progress(const uint32_t progress, const bool done) {
    if (done) {
        start_tx();
    } else
        progressbar.set_value(progress);
}

void MorseView::set_foxhunt(size_t i) {
    message = foxhunt_codes[i];
    buffer = message.c_str();
    text_message.set(message);
    update_tx_duration();
}

MorseView::MorseView(
    NavigationView& nav)
    : nav_(nav) {
    baseband::run_image(portapack::spi_flash::image_tag_tones);

    add_children({&labels,
                  &checkbox_foxhunt,
                  &options_foxhunt,
                  &field_speed,
                  &field_tone,
                  &options_modulation,
                  &options_loop,
                  &text_tx_duration,
                  &text_message,
                  &button_message,
                  &progressbar,
                  &tx_view});

    // load app settings
    auto rc = settings.load("tx_morse", &app_settings);
    if (rc == SETTINGS_OK) {
        transmitter_model.set_rf_amp(app_settings.tx_amp);
        transmitter_model.set_channel_bandwidth(app_settings.channel_bandwidth);
        transmitter_model.set_tuning_frequency(app_settings.tx_frequency);
        transmitter_model.set_tx_gain(app_settings.tx_gain);
    }

    // Default settings
    field_speed.set_value(15);                 // 15wps
    field_tone.set_value(700);                 // 700Hz FM tone
    options_modulation.set_selected_index(0);  // CW mode
    options_loop.set_selected_index(0);        // Off

    checkbox_foxhunt.on_select = [this](Checkbox&, bool value) {
        foxhunt_mode = value;

        if (foxhunt_mode)
            set_foxhunt(options_foxhunt.selected_index_value());
    };

    options_foxhunt.on_change = [this](size_t i, int32_t) {
        if (foxhunt_mode)
            set_foxhunt(i);
    };

    options_modulation.on_change = [this](size_t i, int32_t) {
        modulation = (modulation_t)i;
    };

    options_loop.on_change = [this](size_t i, uint32_t n) {
        (void)i;  // avoid unused warning
        loop = n;
    };

    field_speed.on_change = [this](int32_t) {
        update_tx_duration();
    };

    button_message.on_select = [this, &nav](Button&) {
        this->on_set_text(nav);
    };

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

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

    tx_view.on_stop = [this]() {
        run = false;
        if (ookthread) chThdTerminate(ookthread);

        if (loopthread) {
            chThdTerminate(loopthread);
            chThdWait(loopthread);
            loopthread = nullptr;
        }

        transmitter_model.disable();
        baseband::kill_tone();
        tx_view.set_transmitting(false);
    };
}

} /* namespace ui */