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https://github.com/eried/portapack-mayhem.git
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853ca2ef53
* Solve_low_bit_rate_150k_Capture_App * Applying review comments. * format issues * Adding back requested previous low bit rates
113 lines
4.0 KiB
C++
113 lines
4.0 KiB
C++
/*
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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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#include "ui_freqman.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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: nav_{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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&option_format,
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&record_view,
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&waterfall,
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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_format.set_selected_index(0); // Default to C16
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option_format.on_change = [this](size_t, uint32_t file_type) {
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record_view.set_file_type((RecordView::FileType)file_type);
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};
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freqman_set_bandwidth_option(SPEC_MODULATION, option_bandwidth);
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option_bandwidth.on_change = [this](size_t, uint32_t bandwidth) {
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/* Nyquist would imply a sample rate of 2x bandwidth, but because the ADC
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* provides 2 values (I,Q), the sample_rate is equal to bandwidth here. */
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auto sample_rate = bandwidth;
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/* base_rate (bandwidth) 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.stop();
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// record_view determines the correct oversampling to apply and returns the actual sample rate.
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// NB: record_view is what actually updates proc_capture baseband settings.
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auto actual_sample_rate = record_view.set_sampling_rate(sample_rate);
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// Update the radio model with the actual sampling rate.
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receiver_model.set_sampling_rate(actual_sample_rate);
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// Get suitable anti-aliasing BPF bandwidth for MAX2837 given the actual sample rate.
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auto anti_alias_filter_bandwidth = filter_bandwidth_for_sampling_rate(actual_sample_rate);
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receiver_model.set_baseband_bandwidth(anti_alias_filter_bandwidth);
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waterfall.start();
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};
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receiver_model.enable();
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option_bandwidth.set_by_value(500000); // better by_value than by option_bandwidth.set_selected_index(4), Preselected default option 500kHz.
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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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receiver_model.disable();
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baseband::shutdown();
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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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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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} /* namespace ui */
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