Added basic POCSAG receiver

Added Yes/no modal screen (for future tx warnings)
2025-06-23 06:14:13 -04:00 · 2016-08-23 08:45:33 +02:00 · 2016-08-23 08:45:33 +02:00 · 02f0271553
commit 02f0271553
parent c2fbc0c8d5
34 changed files with 944 additions and 42 deletions
--- a/firmware/application/pocsag_app.cpp
+++ b/firmware/application/pocsag_app.cpp
@ -0,0 +1,168 @@
+/*
+ * 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 "pocsag_app.hpp"
+
+#include "baseband_api.hpp"
+
+#include "portapack.hpp"
+using namespace portapack;
+
+#include "string_format.hpp"
+
+#include "utility.hpp"
+
+#define POCSAG_IDLE		0x7A89C197
+
+namespace pocsag {
+
+namespace format {
+
+static std::string signal_rate_str(SignalRate signal_rate) {
+	switch(signal_rate) {
+		case SignalRate::FSK512:	return "FSK 512 ";
+		case SignalRate::FSK1200:	return "FSK 1200";
+		case SignalRate::FSK2400:	return "FSK 2400";
+		default:					return "- - - - ";
+	}
+}
+
+} /* namespace format */
+
+} /* namespace pocsag */
+
+void POCSAGLogger::on_packet(const pocsag::POCSAGPacket& packet) {
+	std::string entry = pocsag::format::signal_rate_str(packet.signal_rate()) + " ";
+	for (size_t c = 0; c < 16; c++)
+		entry += to_string_hex(packet[c], 8) + " ";
+	
+	log_file.write_entry(packet.timestamp(), entry);
+}
+
+namespace ui {
+
+POCSAGAppView::POCSAGAppView(NavigationView& nav) {
+	baseband::run_image(portapack::spi_flash::image_tag_pocsag);
+
+	add_children({ {
+		&rssi,
+		&channel,
+		&options_band,
+		&field_rf_amp,
+		&field_lna,
+		&field_vga,
+		//&text_debug,
+		&console
+	} });
+
+	radio::enable({
+		tuning_frequency(),
+		sampling_rate,
+		baseband_bandwidth,
+		rf::Direction::Receive,
+		receiver_model.rf_amp(),
+		static_cast<int8_t>(receiver_model.lna()),
+		static_cast<int8_t>(receiver_model.vga()),
+		1,
+	});
+
+	options_band.on_change = [this](size_t, OptionsField::value_t v) {
+		this->on_band_changed(v);
+	};
+	options_band.set_by_value(target_frequency());
+
+	logger = std::make_unique<POCSAGLogger>();
+	if( logger ) {
+		logger->append("pocsag.txt");
+	}
+	
+	baseband::set_pocsag();
+}
+
+POCSAGAppView::~POCSAGAppView() {
+	radio::disable();
+	baseband::shutdown();
+}
+
+void POCSAGAppView::focus() {
+	options_band.focus();
+}
+
+void POCSAGAppView::set_parent_rect(const Rect new_parent_rect) {
+	View::set_parent_rect(new_parent_rect);
+}
+
+void POCSAGAppView::on_packet(const POCSAGPacketMessage * message) {
+	bool eom = false;
+	uint32_t codeword;
+	
+	if( logger ) {
+		logger->on_packet(message->packet);
+	}
+	
+	for (size_t c = 0; c < 16; c++) {
+		codeword = message->packet[c];
+		
+		if (codeword & 0x80000000) {
+			// Message
+			console.writeln("Message !");
+			
+		} else {
+			// Address
+			if (codeword == POCSAG_IDLE) {
+				eom = true;
+			} else {
+				function = (codeword >> 11) & 3;
+				address  = ((codeword >> 10) & 0x1FFFF8) | ((codeword >> 1) & 7);
+			}
+		}
+	}
+
+	if (eom)
+		console.writeln("Address:" + to_string_hex(address, 6) + " Function:" + to_string_dec_uint(function));
+		//console.writeln("EOM");
+	//console.writeln(to_string_hex(message->packet[0], 8) + "/"+ to_string_hex(message->packet[1], 8));
+	
+	if (eom)
+		batch_cnt = 0;
+	else
+		batch_cnt++;
+}
+
+void POCSAGAppView::on_band_changed(const uint32_t new_band_frequency) {
+	set_target_frequency(new_band_frequency);
+}
+
+void POCSAGAppView::set_target_frequency(const uint32_t new_value) {
+	target_frequency_ = new_value;
+	radio::set_tuning_frequency(tuning_frequency());
+}
+
+uint32_t POCSAGAppView::target_frequency() const {
+	return target_frequency_;
+}
+
+uint32_t POCSAGAppView::tuning_frequency() const {
+	return target_frequency() - (sampling_rate / 4);
+}
+
+} /* namespace ui */