172 lines
6.3 KiB
C++
172 lines
6.3 KiB
C++
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/*
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* Copyright (C) 2016 Jared Boone, ShareBrained Technology, Inc.
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* Copyright (C) 2018 Furrtek
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*
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* This file is part of PortaPack.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street,
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* Boston, MA 02110-1301, USA.
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*/
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#include "capture_app.hpp"
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#include "baseband_api.hpp"
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#include "portapack.hpp"
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using namespace portapack;
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namespace ui {
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CaptureAppView::CaptureAppView(NavigationView& nav) {
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baseband::run_image(portapack::spi_flash::image_tag_capture);
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add_children({
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&labels,
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&rssi,
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&channel,
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&field_frequency,
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&field_frequency_step,
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&field_rf_amp,
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&field_lna,
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&field_vga,
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&option_bandwidth,
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&record_view,
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&waterfall,
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});
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// Hack for initialization
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// TODO: This should be included in a more global section so apps dont need to do it
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receiver_model.set_sampling_rate(3072000);
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receiver_model.set_baseband_bandwidth(1750000);
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//-------------------
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field_frequency.set_value(receiver_model.tuning_frequency());
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field_frequency.set_step(receiver_model.frequency_step());
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field_frequency.on_change = [this](rf::Frequency f) {
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this->on_tuning_frequency_changed(f);
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};
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field_frequency.on_edit = [this, &nav]() {
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// TODO: Provide separate modal method/scheme?
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auto new_view = nav.push<FrequencyKeypadView>(receiver_model.tuning_frequency());
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new_view->on_changed = [this](rf::Frequency f) {
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this->on_tuning_frequency_changed(f);
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this->field_frequency.set_value(f);
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};
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};
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field_frequency_step.set_by_value(receiver_model.frequency_step());
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field_frequency_step.on_change = [this](size_t, OptionsField::value_t v) {
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receiver_model.set_frequency_step(v);
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this->field_frequency.set_step(v);
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};
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option_bandwidth.on_change = [this](size_t, uint32_t base_rate) {
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sampling_rate = 8 * base_rate; // Decimation by 8 done on baseband side
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/* base_rate is used for FFT calculation and display LCD, and also in recording writing SD Card rate. */
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/* ex. sampling_rate values, 4Mhz, when recording 500 kHz (BW) and fs 8 Mhz , when selected 1 Mhz BW ...*/
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/* ex. recording 500kHz BW to .C16 file, base_rate clock 500kHz x2(I,Q) x 2 bytes (int signed) =2MB/sec rate SD Card */
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waterfall.on_hide();
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record_view.set_sampling_rate(sampling_rate);
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receiver_model.set_sampling_rate(sampling_rate);
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/* Set up proper anti aliasing BPF bandwith in MAX2837 before ADC sampling according to the new added BW Options . */
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switch(sampling_rate) { // we use the var fs (sampling_rate) , to set up BPF aprox < fs_max/2 by Nyquist theorem.
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case 0 ... 2000000: // BW Captured range (0 <= 250kHz max ) fs = 8 x 250 kHz
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anti_alias_baseband_bandwidth_filter = 1750000; // Minimum BPF MAX2837 for all those lower BW options.
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break;
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case 4000000 ... 6000000: // BW capture range (500k ... 750kHz max ) fs_max = 8 x 750kHz = 6Mhz
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// BW 500k ... 750kHz , ex. 500kHz (fs = 8*BW = 4Mhz) , BW 600kHz (fs = 4,8Mhz) , BW 750 kHz (fs = 6Mhz)
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anti_alias_baseband_bandwidth_filter = 2500000; // in some IC MAX2837 appear 2250000 , but both works similar.
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break;
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case 8800000: // BW capture 1,1Mhz fs = 8 x 1,1Mhz = 8,8Mhz . (1Mhz showed slightly higher noise background).
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anti_alias_baseband_bandwidth_filter = 3500000;
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break;
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case 14000000: // BW capture 1,75Mhz , fs = 8 x 1,75Mhz = 14Mhz
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// good BPF ,good matching, but LCD making flicker , refresh rate should be < 20 Hz , but reasonable picture
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anti_alias_baseband_bandwidth_filter = 5000000;
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break;
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case 16000000: // BW capture 2Mhz , fs = 8 x 2Mhz = 16Mhz
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// good BPF ,good matching, but LCD making flicker , refresh rate should be < 20 Hz , but reasonable picture
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anti_alias_baseband_bandwidth_filter = 6000000;
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break;
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case 20000000: // BW capture 2,5Mhz , fs= 8 x 2,5 Mhz = 20Mhz
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// good BPF ,good matching, but LCD making flicker , refresh rate should be < 20 Hz , but reasonable picture
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anti_alias_baseband_bandwidth_filter = 7000000;
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break;
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default: // BW capture 2,75Mhz, fs = 8 x 2,75Mhz= 22Mhz max ADC sampling) and others.
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// We tested also 9Mhz FPB stightly too much noise floor , better 8Mhz
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anti_alias_baseband_bandwidth_filter = 8000000;
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}
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receiver_model.set_baseband_bandwidth(anti_alias_baseband_bandwidth_filter);
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waterfall.on_show();
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};
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option_bandwidth.set_selected_index(7); // 500k, Preselected starting default option 500kHz
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receiver_model.set_modulation(ReceiverModel::Mode::Capture);
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receiver_model.enable();
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record_view.on_error = [&nav](std::string message) {
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nav.display_modal("Error", message);
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};
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}
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CaptureAppView::~CaptureAppView() {
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// Hack for preventing halting other apps
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// TODO: This should be also part of something global
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receiver_model.set_sampling_rate(3072000);
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receiver_model.set_baseband_bandwidth(1750000);
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receiver_model.set_modulation(ReceiverModel::Mode::WidebandFMAudio);
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// ----------------------------
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receiver_model.disable();
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baseband::shutdown();
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}
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void CaptureAppView::on_hide() {
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// TODO: Terrible kludge because widget system doesn't notify Waterfall that
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// it's being shown or hidden.
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waterfall.on_hide();
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View::on_hide();
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}
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void CaptureAppView::set_parent_rect(const Rect new_parent_rect) {
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View::set_parent_rect(new_parent_rect);
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const ui::Rect waterfall_rect { 0, header_height, new_parent_rect.width(), new_parent_rect.height() - header_height };
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waterfall.set_parent_rect(waterfall_rect);
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}
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void CaptureAppView::focus() {
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record_view.focus();
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}
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void CaptureAppView::on_tuning_frequency_changed(rf::Frequency f) {
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receiver_model.set_tuning_frequency(f);
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}
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} /* namespace ui */
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