Testing OOK TX baseband module

firmware/baseband/proc_ook.cpp

@@ -0,0 +1,108 @@
+/*
+ * Copyright (C) 2014 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_ook.hpp"
+#include "portapack_shared_memory.hpp"
+#include "sine_table_int8.hpp"
+#include "event_m4.hpp"
+
+#include <cstdint>
+
+void OOKProcessor::execute(const buffer_c8_t& buffer) {
+	
+	// This is called at 2.28M/2048 = 1113Hz
+	
+	if (!configured) return;
+	
+	for (size_t i = 0; i<buffer.count; i++) {
+		
+		// Synthesis at 2.28M/2 = 1.14MHz
+		if (!s) {
+			s = 2 - 1;
+			if (sample_count >= samples_per_bit) {
+				if (configured) {
+					cur_bit = (bitstream[bit_pos >> 3] << (bit_pos & 7)) & 0x80;
+					
+					bit_pos++;
+					
+					if (bit_pos >= stream_size) {
+						// End of data
+						if (repeat_counter < repeat) {
+							// Repeat
+							bit_pos = 0;
+							cur_bit = bitstream[0] & 0x80;
+							message.n = repeat_counter + 1;
+							shared_memory.application_queue.push(message);
+							repeat_counter++;
+						} else {
+							// Stop
+							cur_bit = 0;
+							message.n = 0;
+							shared_memory.application_queue.push(message);
+							configured = false;
+						}
+					}
+				}
+				
+				sample_count = 0;
+			} else {
+				sample_count++;
+			}
+		} else {
+			s--;
+		}
+		
+		if (cur_bit) phase += 100;		// ?
+		
+		sphase = phase + (64 << 18);
+
+		re = (sine_table_i8[(sphase & 0x03FC0000) >> 18]);
+		im = (sine_table_i8[(phase & 0x03FC0000) >> 18]);
+		
+		buffer.p[i] = {(int8_t)re, (int8_t)im};
+	}
+}
+
+void OOKProcessor::on_message(const Message* const p) {
+	const auto message = *reinterpret_cast<const OOKConfigureMessage*>(p);
+	
+	if (message.id == Message::ID::OOKConfigure) {
+		//memcpy(bitstream, message.ook_bitstream, 64);
+		
+		samples_per_bit = message.samples_per_bit;
+		stream_size = message.stream_length;
+		repeat = message.repeat - 1;
+	
+		s = 0;
+		sample_count = samples_per_bit;
+		repeat_counter = 0;
+		bit_pos = 0;
+		cur_bit = 0;
+		configured = true;
+	}
+}
+
+int main() {
+	EventDispatcher event_dispatcher { std::make_unique<OOKProcessor>() };
+	event_dispatcher.run();
+	return 0;
+}