Initial firmware commit.

firmware/application/baseband_cpld.cpp

@@ -0,0 +1,51 @@
+/*
+ * Copyright (C) 2014 Jared Boone, ShareBrained Technology, Inc.
+ *
+ * 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 "baseband_cpld.hpp"
+
+#include "hackrf_gpio.hpp"
+using namespace hackrf::one;
+
+namespace baseband {
+
+void CPLD::init() {
+	set_decimation_by(1);
+	gpios_baseband_decimation[0].output();
+	gpios_baseband_decimation[1].output();
+	gpios_baseband_decimation[2].output();
+
+	set_q_invert(false);
+	gpio_baseband_q_invert.output();
+}
+
+void CPLD::set_decimation_by(const uint8_t n) {
+	const uint8_t skip_n = n - 1;
+	const uint8_t value = skip_n ^ 7;
+	gpios_baseband_decimation[0].write(value & 1);
+	gpios_baseband_decimation[1].write(value & 2);
+	gpios_baseband_decimation[2].write(value & 4);
+}
+
+void CPLD::set_q_invert(const bool invert) {
+	gpio_baseband_q_invert.write(invert);
+}
+
+}