Initial commit of files

SoftwareDefined/HackRF/hackrf-2015.07.2/firmware/sgpio-rx/sgpio-rx.c

@@ -0,0 +1,113 @@
+/*
+ * Copyright 2012 Michael Ossmann
+ * Copyright (C) 2012 Jared Boone
+ *
+ * This file is part of HackRF.
+ *
+ * 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 <libopencm3/lpc43xx/gpio.h>
+#include <libopencm3/lpc43xx/sgpio.h>
+
+#include <hackrf_core.h>
+#include <rf_path.h>
+#include <sgpio.h>
+#include <tuning.h>
+
+void tx_test() {
+	sgpio_set_slice_mode(false);
+	sgpio_configure(TRANSCEIVER_MODE_TX);
+	
+	// LSB goes out first, samples are 0x<Q1><I1><Q0><I0>
+	volatile uint32_t buffer[] = {
+		0xda808080,
+		0xda80ff80,
+		0x26808080,
+		0x26800180,
+	};
+	uint32_t i = 0;
+
+	sgpio_cpld_stream_enable();
+	
+	while(true) {
+		while(SGPIO_STATUS_1 == 0);
+		SGPIO_REG_SS(SGPIO_SLICE_A) = buffer[(i++) & 3];
+		SGPIO_CLR_STATUS_1 = 1;
+	}
+}
+
+void rx_test() {
+	sgpio_set_slice_mode(false);
+	sgpio_configure(TRANSCEIVER_MODE_RX);
+
+    volatile uint32_t buffer[4096];
+    uint32_t i = 0;
+	int16_t magsq;
+	int8_t sigi, sigq;
+
+    sgpio_cpld_stream_enable();
+
+	gpio_set(PORT_LED1_3, (PIN_LED2)); /* LED2 on */
+    while(true) {
+        while(SGPIO_STATUS_1 == 0);
+		gpio_set(PORT_LED1_3, (PIN_LED1)); /* LED1 on */
+        SGPIO_CLR_STATUS_1 = 1;
+        buffer[i & 4095] = SGPIO_REG_SS(SGPIO_SLICE_A);
+
+		/* find the magnitude squared */
+		sigi = (buffer[i & 4095] & 0xff) - 0x80;
+		sigq = ((buffer[i & 4095] >> 8) & 0xff) - 0x80;
+		magsq = sigi * sigq;
+		if ((uint16_t)magsq & 0x8000) {
+			magsq ^= 0xffff;
+			magsq++;
+		}
+		
+		/* illuminate LED3 only when magsq exceeds threshold */
+		if (magsq > 0x3c00)
+			gpio_set(PORT_LED1_3, (PIN_LED3)); /* LED3 on */
+		else
+			gpio_clear(PORT_LED1_3, (PIN_LED3)); /* LED3 off */
+		i++;
+    }
+}
+
+int main(void) {
+
+	const uint64_t freq = 2700000000U;
+
+	pin_setup();
+	enable_1v8_power();
+#ifdef HACKRF_ONE
+	enable_rf_power();
+#endif
+	cpu_clock_init();
+    ssp1_init();
+    rf_path_init();
+    rf_path_set_direction(RF_PATH_DIRECTION_RX);
+
+	set_freq(freq);
+
+	rx_test();
+	gpio_set(PORT_LED1_3, (PIN_LED2)); /* LED2 on */
+
+	while (1) {
+
+	}
+
+	return 0;
+}