/* * Copyright (C) 2016 Jared Boone, ShareBrained Technology, Inc. * Copyright (C) 2018 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 "capture_app.hpp" #include "baseband_api.hpp" #include "portapack.hpp" using namespace portapack; namespace ui { CaptureAppView::CaptureAppView(NavigationView& nav) { baseband::run_image(portapack::spi_flash::image_tag_capture); add_children({ &labels, &rssi, &channel, &field_frequency, &field_frequency_step, &field_rf_amp, &field_lna, &field_vga, &option_bandwidth, &record_view, &waterfall, }); // Hack for initialization // TODO: This should be included in a more global section so apps dont need to do it receiver_model.set_sampling_rate(3072000); receiver_model.set_baseband_bandwidth(1750000); //------------------- field_frequency.set_value(receiver_model.tuning_frequency()); field_frequency.set_step(receiver_model.frequency_step()); field_frequency.on_change = [this](rf::Frequency f) { this->on_tuning_frequency_changed(f); }; field_frequency.on_edit = [this, &nav]() { // TODO: Provide separate modal method/scheme? auto new_view = nav.push(receiver_model.tuning_frequency()); new_view->on_changed = [this](rf::Frequency f) { this->on_tuning_frequency_changed(f); this->field_frequency.set_value(f); }; }; field_frequency_step.set_by_value(receiver_model.frequency_step()); field_frequency_step.on_change = [this](size_t, OptionsField::value_t v) { receiver_model.set_frequency_step(v); this->field_frequency.set_step(v); }; option_bandwidth.on_change = [this](size_t, uint32_t base_rate) { sampling_rate = 8 * base_rate; // Decimation by 8 done on baseband side /* base_rate is used for FFT calculation and display LCD, and also in recording writing SD Card rate. */ /* ex. sampling_rate values, 4Mhz, when recording 500 kHz (BW) and fs 8 Mhz , when selected 1 Mhz BW ...*/ /* ex. recording 500kHz BW to .C16 file, base_rate clock 500kHz x2(I,Q) x 2 bytes (int signed) =2MB/sec rate SD Card */ waterfall.on_hide(); record_view.set_sampling_rate(sampling_rate); receiver_model.set_sampling_rate(sampling_rate); /* Set up proper anti aliasing BPF bandwith in MAX2837 before ADC sampling according to the new added BW Options . */ switch(sampling_rate) { // we use the var fs (sampling_rate) , to set up BPF aprox < fs_max/2 by Nyquist theorem. case 0 ... 2000000: // BW Captured range (0 <= 250kHz max ) fs = 8 x 250 kHz anti_alias_baseband_bandwidth_filter = 1750000; // Minimum BPF MAX2837 for all those lower BW options. break; case 4000000 ... 6000000: // BW capture range (500k ... 750kHz max ) fs_max = 8 x 750kHz = 6Mhz // BW 500k ... 750kHz , ex. 500kHz (fs = 8*BW = 4Mhz) , BW 600kHz (fs = 4,8Mhz) , BW 750 kHz (fs = 6Mhz) anti_alias_baseband_bandwidth_filter = 2500000; // in some IC MAX2837 appear 2250000 , but both works similar. break; case 8800000: // BW capture 1,1Mhz fs = 8 x 1,1Mhz = 8,8Mhz . (1Mhz showed slightly higher noise background). anti_alias_baseband_bandwidth_filter = 3500000; break; case 14000000: // BW capture 1,75Mhz , fs = 8 x 1,75Mhz = 14Mhz // good BPF ,good matching, but LCD making flicker , refresh rate should be < 20 Hz , but reasonable picture anti_alias_baseband_bandwidth_filter = 5000000; break; case 16000000: // BW capture 2Mhz , fs = 8 x 2Mhz = 16Mhz // good BPF ,good matching, but LCD making flicker , refresh rate should be < 20 Hz , but reasonable picture anti_alias_baseband_bandwidth_filter = 6000000; break; case 20000000: // BW capture 2,5Mhz , fs= 8 x 2,5 Mhz = 20Mhz // good BPF ,good matching, but LCD making flicker , refresh rate should be < 20 Hz , but reasonable picture anti_alias_baseband_bandwidth_filter = 7000000; break; default: // BW capture 2,75Mhz, fs = 8 x 2,75Mhz= 22Mhz max ADC sampling) and others. // We tested also 9Mhz FPB stightly too much noise floor , better 8Mhz anti_alias_baseband_bandwidth_filter = 8000000; } receiver_model.set_baseband_bandwidth(anti_alias_baseband_bandwidth_filter); waterfall.on_show(); }; option_bandwidth.set_selected_index(7); // 500k, Preselected starting default option 500kHz receiver_model.set_modulation(ReceiverModel::Mode::Capture); receiver_model.enable(); record_view.on_error = [&nav](std::string message) { nav.display_modal("Error", message); }; } CaptureAppView::~CaptureAppView() { // Hack for preventing halting other apps // TODO: This should be also part of something global receiver_model.set_sampling_rate(3072000); receiver_model.set_baseband_bandwidth(1750000); receiver_model.set_modulation(ReceiverModel::Mode::WidebandFMAudio); // ---------------------------- receiver_model.disable(); baseband::shutdown(); } void CaptureAppView::on_hide() { // TODO: Terrible kludge because widget system doesn't notify Waterfall that // it's being shown or hidden. waterfall.on_hide(); View::on_hide(); } void CaptureAppView::set_parent_rect(const Rect new_parent_rect) { View::set_parent_rect(new_parent_rect); const ui::Rect waterfall_rect { 0, header_height, new_parent_rect.width(), new_parent_rect.height() - header_height }; waterfall.set_parent_rect(waterfall_rect); } void CaptureAppView::focus() { record_view.focus(); } void CaptureAppView::on_tuning_frequency_changed(rf::Frequency f) { receiver_model.set_tuning_frequency(f); } } /* namespace ui */