Added EPAR transmit (slow FSK), bit bug for now

firmware/baseband-tx/Makefile

@@ -140,6 +140,7 @@ CPPSRC = main.cpp \
          matched_filter.cpp \
          proc_audiotx.cpp \
          proc_fsk_lcr.cpp \
+         proc_epar.cpp \
          proc_playaudio.cpp \
          proc_xylos.cpp \
          dsp_squelch.cpp \

firmware/baseband-tx/baseband_thread.cpp

@@ -31,6 +31,7 @@
 #include "proc_playaudio.hpp"
 #include "proc_audiotx.hpp"
 #include "proc_xylos.hpp"
+#include "proc_epar.hpp"
 #include "proc_fsk_lcr.hpp"
 
 #include "rssi.hpp"
@@ -124,6 +125,7 @@ BasebandProcessor* BasebandThread::create_processor(const int32_t mode) {
 	case 1:		return new AudioTXProcessor();
 	case 2:		return new XylosProcessor();
 	case 3:		return new LCRFSKProcessor();
+	case 4:		return new EPARProcessor();
 	default:	return nullptr;
 	}
 }

firmware/baseband-tx/proc_epar.cpp

@@ -0,0 +1,104 @@
+/*
+ * 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 "proc_epar.hpp"
+
+#include "dsp_iir_config.hpp"
+#include "audio_output.hpp"
+
+#include "portapack_shared_memory.hpp"
+#include "sine_table.hpp"
+
+#include <cstdint>
+
+void EPARProcessor::execute(const buffer_c8_t& buffer) {
+	
+	// This is called at 1536000/2048 = 750Hz
+	
+	for (size_t i = 0; i<buffer.count; i++) {
+		
+		// Sample generation rate: 1536000/10 = 153kHz
+		if (s >= 9) {
+			s = 0;
+			
+			if (sample_count >= EPAR_TU) {
+				
+				if (state) {
+					// Send code
+					if (current_tu == 2) {
+						current_bit = shared_memory.epardata[bit_pos];
+						if (bit_pos == 12) {
+							bit_pos = 0;
+							current_tu = 0;
+							state = 0;
+						} else {
+							bit_pos++;
+						}
+
+						current_tu = 0;
+					} else {
+						current_tu++;
+					}
+					
+					sample = bitdef[current_bit][current_tu];
+				} else {
+					// Pause
+					if (current_tu == EPAR_SPACE) {
+						if (repeat_count == EPAR_REPEAT) {
+							message.n = 100;			// End of transmission code
+							shared_memory.transmit_done = true;
+							shared_memory.application_queue.push(message);
+						}
+						if (shared_memory.transmit_done == false) {
+							message.n = repeat_count;	// Inform UI about progress (just as eye candy)
+							shared_memory.application_queue.push(message);
+							state = 1;
+						}
+						repeat_count++;
+						current_tu = 0;
+					} else {
+						current_tu++;
+					}
+					sample = 0;
+				}
+				
+				sample_count = 0;
+			} else {
+				sample_count++;
+			}
+			
+		} else {
+			s++;
+		}
+		
+		//FM
+		frq = sample * 1000; // ~25kHz wide
+		
+		phase = (phase + frq);
+		sphase = phase + (256<<16);
+
+		re = (sine_table_f32[(sphase & 0x03FF0000)>>18]*127);
+		im = (sine_table_f32[(phase & 0x03FF0000)>>18]*127);
+		
+		buffer.p[i] = {(int8_t)re,(int8_t)im};
+	}
+}

firmware/baseband-tx/proc_epar.hpp

@@ -0,0 +1,70 @@
+/*
+ * 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 __PROC_EPAR_H__
+#define __PROC_EPAR_H__
+
+#include "baseband_processor.hpp"
+
+#include "dsp_decimate.hpp"
+#include "dsp_demodulate.hpp"
+
+#include "audio_output.hpp"
+#include "baseband_processor.hpp"
+
+// One bit is 0.005119048s (~200bps ?)
+// Time unit is 0.001706349s (586Hz)
+
+#define EPAR_TU 262-1 		// 1536000/10/586
+#define EPAR_SPACE 33-1
+#define EPAR_REPEAT 26*2	// DEBUG
+
+// 0: 011
+// 1: 001
+
+// Good: 1001110111111
+// Bad:  1100111011111
+
+class EPARProcessor : public BasebandProcessor {
+public:
+	void execute(const buffer_c8_t& buffer) override;
+
+private:
+	const uint8_t bitdef[2][3] = {
+		{0, 255, 255},
+		{0, 0, 255}
+	};
+	int8_t re, im;
+	uint8_t s;
+	uint8_t state_length = 0;
+	uint8_t current_bit = 0;
+	uint8_t current_tu = 0;
+    uint8_t bit_pos = 0;
+    uint8_t repeat_count = 0;
+    uint32_t sample_count = 0;
+	uint32_t aphase, phase, sphase;
+	int32_t sample, frq;
+	uint8_t state = 1;
+	TXDoneMessage message;
+};
+
+#endif

firmware/baseband-tx/proc_xylos.cpp

@@ -43,7 +43,7 @@ void XylosProcessor::execute(const buffer_c8_t& buffer) {
 			s = 0;
 			
 			if (sample_count >= CCIR_TONELENGTH) {
-				if (shared_memory.xylos_transmit_done == false) {
+				if (shared_memory.transmit_done == false) {
 					message.n = byte_pos;	// Inform UI about progress (just as eye candy)
 					shared_memory.application_queue.push(message);
 					digit = shared_memory.xylosdata[byte_pos++];
@@ -51,7 +51,7 @@ void XylosProcessor::execute(const buffer_c8_t& buffer) {
 					
 				if (digit == 0xFF) {
 					message.n = 25;	// End of message code
-					shared_memory.xylos_transmit_done = true;
+					shared_memory.transmit_done = true;
 					shared_memory.application_queue.push(message);
 				}
 				
@@ -60,7 +60,7 @@ void XylosProcessor::execute(const buffer_c8_t& buffer) {
 				sample_count++;
 			}
 			
-			aphase += ccir_phases[digit];		// DEBUG
+			aphase += ccir_phases[digit];
 		} else {
 			s++;
 		}
@@ -76,7 +76,7 @@ void XylosProcessor::execute(const buffer_c8_t& buffer) {
 		}*/
 		
 		//FM
-		frq = sample * 1000; // ~10kHz wide
+		frq = sample * 1000; // ~25kHz wide
 		
 		phase = (phase + frq);
 		sphase = phase + (256<<16);