Added basic POCSAG receiver

Added Yes/no modal screen (for future tx warnings)

firmware/common/dsp_iir_config.hpp

@@ -40,6 +40,7 @@ constexpr iir_biquad_config_t audio_48k_hpf_300hz_config {
 constexpr iir_biquad_config_t audio_24k_hpf_300hz_config {
 	{  0.94597686f, -1.89195371f,  0.94597686f },
 	{  1.00000000f, -1.88903308f,  0.89487434f }
+
 };
 
 // scipy.signal.butter(2, 300 / 8000.0, 'highpass', analog=False)

firmware/common/message.hpp

@@ -32,6 +32,7 @@
 #include "baseband_packet.hpp"
 #include "ert_packet.hpp"
 #include "tpms_packet.hpp"
+#include "pocsag_packet.hpp"
 #include "dsp_fir_taps.hpp"
 #include "dsp_iir.hpp"
 #include "fifo.hpp"
@@ -73,9 +74,12 @@ public:
 		OOKConfigure = 25,
 		RDSConfigure = 26,
 		AudioTXConfig = 27,
+		POCSAGConfigure = 28,
 		
-		FIFOSignal = 28,
-		FIFOData = 29,
+		POCSAGPacket = 30,
+		
+		FIFOSignal = 31,
+		FIFOData = 32,
 		MAX
 	};
 
@@ -270,6 +274,18 @@ public:
 	baseband::Packet packet;
 };
 
+class POCSAGPacketMessage : public Message {
+public:
+	constexpr POCSAGPacketMessage(
+		const pocsag::POCSAGPacket& packet
+	) : Message { ID::POCSAGPacket },
+		packet { packet }
+	{
+	}
+	
+	pocsag::POCSAGPacket packet;
+};
+
 class ShutdownMessage : public Message {
 public:
 	constexpr ShutdownMessage(
@@ -602,6 +618,18 @@ public:
 	const uint32_t pause_symbols;
 };
 
+class POCSAGConfigureMessage : public Message {
+public:
+	constexpr POCSAGConfigureMessage(
+		const uint32_t rate
+	) : Message { ID::POCSAGConfigure },
+		rate(rate)
+	{
+	}
+
+	const uint32_t rate;
+};
+
 // TODO: use streaming buffer instead
 class FIFOSignalMessage : public Message {
 public:

firmware/common/pocsag_packet.cpp

@@ -0,0 +1,27 @@
+/*
+ * 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_packet.hpp"
+
+namespace pocsag {
+
+} /* namespace pocsag */

firmware/common/pocsag_packet.hpp

@@ -0,0 +1,78 @@
+/*
+ * 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.
+ */
+
+#ifndef __POCSAG_PACKET_H__
+#define __POCSAG_PACKET_H__
+
+#include <cstdint>
+#include <cstddef>
+
+#include "optional.hpp"
+
+#include "baseband.hpp"
+
+namespace pocsag {
+
+enum SignalRate : uint32_t {
+	FSK512 = 1,
+	FSK1200 = 2,
+	FSK2400 = 3,
+	DEBUG = 4
+};
+
+class POCSAGPacket {
+public:
+	void set_timestamp(const Timestamp& value) {
+		timestamp_ = value;
+	}
+	
+	Timestamp timestamp() const {
+		return timestamp_;
+	}
+
+	void set(const size_t index, const uint32_t data) {
+		if (index < 16)
+			codewords[index] = data;
+	}
+
+	uint32_t operator[](const size_t index) const {
+		return (index < 16) ? codewords[index] : 0;
+	}
+	
+	SignalRate signal_rate() const {
+		return FSK1200;
+	}
+
+	void clear() {
+		for (size_t c = 0; c < 16; c++)
+			codewords[c] = 0;
+	}
+
+private:
+	//SignalRate rate = FSK1200;
+	uint32_t codewords[16];
+	Timestamp timestamp_ { };
+};
+
+} /* namespace pocsag */
+
+#endif/*__POCSAG_PACKET_H__*/

firmware/common/spi_image.hpp

@@ -68,6 +68,7 @@ constexpr image_tag_t image_tag_capture				{ 'P', 'C', 'A', 'P' };
 constexpr image_tag_t image_tag_ert					{ 'P', 'E', 'R', 'T' };
 constexpr image_tag_t image_tag_nfm_audio			{ 'P', 'N', 'F', 'M' };
 constexpr image_tag_t image_tag_tpms				{ 'P', 'T', 'P', 'M' };
+constexpr image_tag_t image_tag_pocsag				{ 'P', 'P', 'O', 'C' };
 constexpr image_tag_t image_tag_wfm_audio			{ 'P', 'W', 'F', 'M' };
 constexpr image_tag_t image_tag_wideband_spectrum	{ 'P', 'S', 'P', 'E' };