Initial firmware commit.

firmware/baseband/rssi.cpp

@@ -0,0 +1,91 @@
+/*
+ * 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 "rssi.hpp"
+
+#include <cstdint>
+
+#include "adc.hpp"
+#include "rssi_dma.hpp"
+#include "utility.hpp"
+
+#include "hal.h"
+
+using namespace lpc43xx;
+
+#include "hackrf_hal.hpp"
+using namespace hackrf::one;
+
+#include "portapack_adc.hpp"
+
+namespace rf {
+namespace rssi {
+
+constexpr uint32_t adc1_sel = (1U << portapack::adc1_rssi_input);
+const auto adc1_interrupt_mask = 0;
+
+//constexpr uint32_t adc1_clkdiv = base_apb3_clk_f / adc::clock_rate_max;
+constexpr adc::CR adc1_cr {
+	.sel = adc1_sel,
+	.clkdiv = 49,		/* 400kHz sample rate, 2.5us/sample @ 200MHz PCLK */
+	.resolution = 9,	/* Ten clocks */
+	.edge = 0,
+};
+constexpr adc::Config adc1_config {
+	.cr = adc1_cr,
+};
+
+// volatile size_t rssi_buffer_available_count = 0;
+// volatile size_t rssi_buffer_error_count = 0;
+
+// static void rssi_buffer_available() {
+// 	rssi_buffer_available_count++;
+// }
+
+// static void rssi_buffer_error() {
+// 	rssi_buffer_error_count++;
+// }
+
+void init() {
+	adc1.clock_enable();
+	//adc1.interrupts_disable();
+	adc1.power_up(adc1_config);
+
+	/* An interrupt must be enabled within peripheral to issue request to
+	 *GPDMA */
+	adc1.interrupts_enable(adc1_interrupt_mask);
+
+	dma::init();
+//	dma::set_handlers(rssi_buffer_available, rssi_buffer_error);
+}
+
+void start() {
+	dma::enable();
+	adc1.start_burst();
+}
+
+void stop() {
+	dma::disable();
+	adc1.stop_burst();
+}
+
+} /* namespace rssi */
+} /* namespace rf */